SYHDFEE-1X/355R-VZB25U99-0576-A0A1V

Manufacturer: Bosch Rexroth

Material #: R978052721

Model : SYHDFEE-1X/355R-VZB25U99-0576-A0A1V

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth SYHDFEE-1X/355R-VZB25U99-0576-A0A1V (R978052721) is a sophisticated hydraulic control system designed for precise electrohydraulic control of axial piston variable displacement pumps. This system is particularly optimized for the AVSO series of pumps, ensuring seamless integration and operation. The SYHDFEE-1X/355R-VZB25U99-0576-A0A1V includes a comprehensive set of components such as a pilot control valve, counter piston, actuating piston, and springs for robust functionality. Incorporated within this system are advanced sensors including an inductive position transducer and a swivel angle position sensor to accurately monitor valve positioning and the swivel angle of the pump. The proportional solenoid plays a critical role in adjusting the flow as per command signals, while the valve spool is integral to directing hydraulic fluid flow within the system. The model also features integral electronics that simplify circuitry and reduce installation complexity. It comes equipped with Connector X for easy connection to pressure transducers like the HM series, providing real-time pressure feedback when configured with actual pressure value input F. Additionally, there's provision for connecting to a CAN bus through Mating connector X in certain configurations. The drive shaft and connection flange are engineered for durability and reliable power transmission. Users have the option to include a subplate with or without through-drive according to their specific requirements. This control system is capable of swivel angle control, pressure control, torque limitation, and features Master/Slave communication capabilities. It supports analog signals which can be configured according to user needs. With its maximum operating pressure bar rating, it ensures efficient performance in various hydraulic applications requiring meticulous control over pump operations.

$57,341.00 USD

More are expected on May 23, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as May 23, 2025 when ordered in

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Repairs from $9,978.00

A SYHDFEE-1X control system is used for the electro-hydraulic control of swivel angle, pressure and power (partially optional, see ordering code) of an axial piston variable displacement pump.
The control system consists of the following components: A4VSO axial piston variable displacement pump optimized for the operation in the control system VT-DFPE-2X or VT-DFPD-1X proportional valve as pilot valve including inductive position transducer for valve position sensing. Position transducer for sensing the swivel angle Pressure transducer with suitable signal level and dynamics (optionally HM 20, separate order)

1	Swash plate
2	Pilot control valve
3	Counter piston
4	Actuating piston
5	Spring
6	Inductive position transducer for valve position
7	Swivel angle position sensor
8	Proportional solenoid
9	Valve spool
10	Spring
11	Integral electronics
12	Connector X1
13	Connector X2 for connection of the pressure transducer HM 20, cable version (for SYHDFEE only with actual pressurevalue input F, for SYHDFEC/SYHDFEn always available)
14	Mating connector X3 for connection of the CAN bus (only available with SYDFEC/SYDFEn)
15	Drive shaft
16	Connection flange
17	Subplate, optionally with through-drive

01	02	03		04	05	06	07	08		09		10	11	12	13	14		15
SYHDFEE-1X/	125		–				25	U99	–		–		0				–	*

Pump of the SYHDFE.-1X control system
Series
01	Control system with integrated analog electronics							SYHDFEE‑1X
Size		040	071	125	180	250	355
02	Displacement cm³	40	71	125	180	250	355
Direction of rotation looking at the drive shaft
03	Right	●	●	●	●	●	●	R
03	Left	●	●	●	●	●	●	L
Hydraulic fluid
04	Mineral oil according to DIN 51524 (HL/HLP)	●	●	●	●	●	●	V
04	HFC	–	●	●	●	●	●	F
Drive shaft variant
05	Cylindrical with fitting key DIN 6885 (not in connection with through-drive)	●	●	●	●	●	●	P
05	Splined shaft profile DIN 5480	●	●	●	●	●	●	Z
Connection flange
06	ISO 4-hole	●	●	●	●	●	●	B
Port for working lines pressure port B and suction port S
07	Port B and S: SAE, laterally displaced by 90°, metric mounting thread, 2nd pressure port B1 vis-à-vis B – upon delivery closed by means of flange plate	●	●	●	●	●	●	25
Through-drive (All through-drives with single pumps come without a hub and are operationally safe, provided with an end cover)
08	Universal through-drive U99 closed operationally safe with end cover at the factory; for components for the adaptation of more pump stages, see table Accessories for through-drives	–	–	●	●	●	●	U99
	Through-drive K99 closed operationally safe with end cover at the factory; for components for the adaptation of more pump stages, see the table in accessories for through-drives	●	●	–	–	–	–	K99
	Without through-drive	●	●	–	–	–	–	N00
	Centering: ISO ⌀100 mm Attachment pump (examples): A10VSO..31 NG28/45	–	●	–	–	–	–	KD3
	Centering: SAE ⌀82,55 mm Attachment pump (examples): A10VSO..31 NG18, PGF2M, PGH2, PGH3, AZPF	●	●	–	–	–	–	KC1
Base pump variant
09	Standard (internal pilot oil)	●	●	●	●	●	●	0000
09	External supply	●	●	●	●	●	●	0576
Pilot and preload valve of the SYHDFEE control system
Spool design
10	Standard							A
10	4-groove spool (e.g. for HFC fluids)							C
Integrated electronics, installation orientation
11	Integrated electronics parallel to the pump axis direction subplate							0
Control, additional function				A	B	C	D
12	Switchable pressure controller (high signal)			●				A
	Power limitation adjustable at the OBE valve				●			B
	Power limitation adjustable via analog input					●		C
	Pressure controller that can be switched off (high signal)						●	D
Electronics assembly, option
13	Standard electronics with leakage oil compensation			●	●	●	●	0
13	Standard electronics without leakage oil compensation			●	●	●	●	1
Actual pressure value input (For the description of the connectors refer to electrical connection)							Plug-in connector
14	Current input 4...20 mA						X1	C
	Voltage input 0...10 V						X1	V
	Voltage input 1...10 V						X1	E
	Voltage input 0.5...5 V						X2	F
15	Further details in the plain text e. g. SO variant							*

●	available
-	not available

Ordering code pump combination SYHDFEE-1X

01		02		03		04		05
SY2HDFEE-1X	/		–		/		+

01	2-fold pump	SY2HDFEE-1X
02	Size of the main pump 1)
03	Size of the attachment pump or pump abbreviation if the attachment pump is not SYHDFE (e.g. PGF) 1)
04	Material number without "R9" for the main pump or type designation if material number is not known
05	Material number without "R9" for the attachment pump or type designation if material number is not known

1)	Detailed information see type key

01		02		03		04
SY3HDFEE-1X	/		+		+

01	3-fold pump	SY3HDFEE-1X
02	Material number without "R9" for the main pump or type designation if material number is not known
03	Material number without "R9" for the attachment pump or type designation if material number is not known
04	Material number without "R9" for the attachment pump or type designation if material number is not known

Example of a name plate

Notice:

For enquiries regarding the control system, material number, production order number, serial number, and date of production are necessary.

For applications outside these parameters, please consult us!

mechanic and hydraulic

Size				40	71	125	180	250	355
Displacement		Vg max	cm³	40	71	125	180	250	355
Speed 1)	maximum at Vg max	no	rpm	2600	2200	1800		1900	1700
Speed 1)	maximum at Vg max and HFC fluids	no	rpm		2200	1800		1500
Minimum speed 2)		nmin	rpm	200
Min. Speed at HFC-fluids	with ν = 25 mm2/s	nmin	rpm		750	850	600	550	450
Max. flow (displacement)	at n0 and Vg max	qv0 max	l/min	104	156	225	324	450	533
Max. flow (displacement)	with nE = 1500 min-1 and Vg max	qvE max	l/min	60	107	186	270	375	533
Max. power (Δp = 350 bar)	at n0 and Vg max	P0 max	kW	61	91	131	189	263	311
Max. power (Δp = 350 bar)	with nE = 1500 min-1 and Vg max	PE max	kW	35	62	109	158	219	311
Max. torque (Δp = 350 bar)		Tmax	Nm	223	395	696	1002	1391	1976
Maximum permissible drive torque	Fitting key	Ttotal	Nm	380	700	1392	1400	2300	3557
	Splined shaft S overall torque	Ttotal	Nm	446	790	1392	2004	2782	3952
	Max. admissible through-drive torque	TD	Nm	223	395	696	1002	1391	1976
Drive shaft load	max. admissible axial force	Fax max	N	600	800	1000	1400	1800	2000
Drive shaft load	max. admissible radial force 3)	Fq	N	1000	1200	1600	2000		2200
Weight without filling quantity		m	kg	39	53	88	102	184	207
Moment of inertia around drive axis			kg·m²	0.0049	0.0121	0.03	0.055	0.0959	0.19
Filling quantity of the housing			l	2	2.5	5	4	10	8
Maximum admissible operating pressure 4)		pmax	bar	350
Operating pressure, min. (without load)		pmin	bar	≥ 20
Admissible inlet pressure		p	bar	0.8 ... 30
Hydraulic fluid				Mineral oil (HL, HLP) according to DIN 51524; HFC optional
Hydraulic fluid temperature range		ϑ	°C	-20 … +70
Maximum admissible degree of contamination of the hydraulic fluid according to ISO 4406				Class 18/16/13 (for particle size ≤ 4/6/14 μm)

1)	The values are applicable at an absolute pressure of 1 bar at the suction opening S. With a reduction of the displacement or an increase in the inlet pressure, the speed can be increased according to the following characteristic curve. With a reduced inlet pressure, the speed is to be reduced.
2)	Does not apply to HFC fluid, formula for determination of the minimum speed see below
3)	In case of higher radial forces, please consult us. Not applicable for use of HFC fluids.
4)	When using HFC fluids, also see data sheet 92053.

Admissible load ‒ determination of nominal load and minimum speed

1)	At SYHDFEN, the minimum speed can be determined by means of the derating function.

Example 1:

A4VSO125 may be operated at ν = 16 mm2/s

as of n = 1328 rpm with nominal load

Example 2:

the admissible load for A4VSO250

is n = 500 rpm and 10 mm2/s

x = 10/25*500/550 = 0.364 (= 127 bar at Vgmax)

electrical

Size				40	71	125	180	250	355
Operating voltage		UB		24 VDC +40 % –5 %
Operating range (short-time operation)	Upper limit value	UB(t)max	V	35
	Lower limit value	UB(t)min	V	21
Current consumption (in static control operation)	Rated current	Inom	A	0.6
	Maximum current	Imax	A	1.25
Inputs	Actual pressure value input X1; pin 10 and 11	U or I		Determination by means of ordering code
	Analog current inputs, load	RB		100 Ω
	Analog voltage inputs	RE		≥ 50 kΩ
	Digital inputs	Logic 0		≤ 0,6 V
		Logic 1		≥ 21 V
Outputs	pactual / UOUT1	UO 1)		0 ... 10 V
		Imax 1)		1,5 mA
	αactual / UOUT2	UO 1)		± 10 V
		Imax 1)		1,5 mA
	Digital outputs	Logic 0		Ua < 1 V
		Logic 1		Ua ≥ UB – 5 V; 10 mA (short-circuit-proof)
Ambient temperature range at the pump		ϑ	°C	0 … 60
Storage temperature range (pump + electronics)		ϑ	°C	0 … 70
Electronics design				Integrated in the pilot valve (OBE)
Type of protection according to EN 60529	Pump incl. pilot valve			IP65 with mounted and locked plug-in connectors
Power limitation				optional

1)	With SYDFEC, the outputs are parameterizable, for the condition as supplied, see electrical connection

Notice:

For information on the environment simulation testing for the areas of EMC (electro-magnetic compatibility), climate and mechanical load, see data sheet 30030-U.

Bearing flushing

With the following operating conditions, bearing flushing is necessary for safe continuous operation:

Applications with special fluids (not mineral fluids) due to limited lubricity and tight operating temperature range Operation with boundary conditions of temperature and viscosity with mineral oil operation

With vertical installation (drive shaft upwards), bearing flushing is recommended for lubrication of the front bearing and the shaft seal ring.

The bearing is flushed using port "U" in the area of the front flange of the variable displacement pump. The flushing fluid flows through the front bearing and exits with the pump leakage at the leakage connection.

For the individual sizes, the following flushing quantities are recommended:

Size			40	71	125	180	250	355
recommended flushing quantity	qSp	l/min	3	4	5	7	10	15

The specified flushing quantities result in a pressure differential between port "U” (including fitting) and the leakage chamber of approx. 2 bar (series 1) and approx. 3 bar (series 3).

When using the external bearing flushing, the throttle screw in port U has to be screwed-in to the stop.

Leakage pressure

The admissible leakage pressure (housing pressure) depends on the speed (see diagram).

Max. leakage pressure (housing pressure)

pL abs max = 4 bar absolute

These specifications are guidelines; under special operating conditions, a limitation may become necessary.

Flow direction

S → B

Control loop quality

Notes:

The specified values are only valid when using the system-related components specified in this data sheet. At pressures < 20 bar, higher tolerances have to be anticipated due to lower actuating forces.

	Swivel angle control	Pressure control 1)
Linearity tolerance	≤ 1.0 %	≤ 1.5 %
Temperature error	≤ 0.5 % / 10 K	≤ 0.5 % / 10 K
Hysteresis	≤ 0.2 %	≤ 0.2 %
Repetition accuracy	≤ 0.2 %	≤ 0.2 %

1)	Without considering the pump pulsation.

Through-drives: Torques

Admissible drive and through-drive torques
Size			40	71	125	180	250	355
Splined shaft
Maximally admissible total drive torque at the shaft of pump 1 (pump 1 + pump 2)	TGes max	[Nm]	446	790	1392	2004	2782	3952
A Admissible through-drive torque	TD1 max	[Nm]	223	395	696	1002	1391	1976
A Admissible through-drive torque	TD2 max	[Nm]	223	395	696	1002	1391	1976
B Admissible through-drive torque	TD1 max	[Nm]	223	395	696	1002	1391	1976
B Admissible through-drive torque	TD2 max	[Nm]	223	395	696	1002	1391	1976
Fitting key
Maximally admissible total drive torque at the shaft of pump 1 (pump 1 + pump 2)	TGes max	[Nm]	380	700	1392	1400	2300	3557
A Admissible through-drive torque	TD1 max	[Nm]	223	395	696	1002	1391	1976
A Admissible through-drive torque	TD2 max	[Nm]	157	305	696	398	909	1581
B Admissible through-drive torque	TD1 max	[Nm]	157	305	696	398	909	1581
B Admissible through-drive torque	TD2 max	[Nm]	223	395	696	1002	1391	1976

Distribution of the torques

Admissible mass torque

related to mounting flange of the main pump

Tm [Nm]	Admissible mass torque
m1, m2 [kg]	Weight of the pump
l1, l2 [mm]	Distance of the center of gravity

Size			40	71	125	180	250	355
Admissible mass torque	Tm zul.	Nm	1800	2000	4200	4200	9300	9300
Admissible mass torque with dynamic mass acceleration of 10 g = 98.1 m/sec2	Tm zul.	Nm	180	200	420	420	930	930
Weight (SYHDFE or A4VSO...DR)	m	kg	39	53	88	102	184	207
Distance of the center of gravity	l1	mm	120	140	170	180	210	220

Tightening torques:

The tightening torques specified in this data sheet are maximum values and must not be exceeded (maximum values for screw-in threads).
Manufacturer's specifications on the max. admissible tightening torques of the fittings used are to be observed! For mounting screws according to DIN 13, we recommend checking the tightening torque case by case according to VDI 2230, version 2003.

Transition function with pressure command value step with spool design "A"

The specified curve shapes and control times refer to a drive speed of 1500 rpm and are only reached with an optimization of the pressure controller.

T95% in ms with a connected hydraulic fluid volume (lines and actuators)

Hydraulic fluid volume	T95%
5 – 10 l	200 ms
15 – 25 l	250 ms

	For pressures up to 40 bar, the values of the response times are greater.

Transition function with swivel angle command value step with spool design "A"

Size 40, 71 p = 100 bar

Size 125 p = 100 bar

Size 180 p = 100 bar

Size 250 p = 100 bar

Size 355 p = 100 bar

Schematic diagram: Actuating system supplied internally

S	Suction port
K1, K2	Flushing port
T	Fluid drain
MB	Measuring port operating pressure (M14x1,5)
MS	Measuring port suction pressure
M1, M2	Measuring port control chamber pressure
R(L)	Fluid filling + bleeding (leakage connection)
U	Flushing port
B	Pressure port
B1	2nd Pressure port/additional port
MB1	Measuring port operating pressure NG250/355: G1/4 NG 40/71/125/180: Blind flange attached to B1 with pressure measuring port G1/4

When using the HM20-2X/...C13 pressure transducer:

Installation in MB or MB1 (pump) in connection with electronic version "actual pressure value input F" For attaching an HM20-2X/315-F-C13-0,5 in MB attachment, an adapter from M14x1.5 to G1/4 (mat. no. R900695665) is necessary. Due to the installation position, the HM20 cable version cannot be used for all sizes without restrictions (use with M12 extension cable).

When using an external pressure transducer:

Installation in the B line (preferably close to the actuator) and electrical connection via the central connection X1. Explanation in the operating instructions.

Schematic diagram: Actuating system supplied externally

S	Suction port
K1, K2	Flushing port
T	Fluid drain
MB	Measuring port operating pressure (M14x1,5)
MS	Measuring port suction pressure
M1, M2	Measuring port control chamber pressure
R(L)	Fluid filling + bleeding (leakage connection)
U	Flushing port
B	Pressure port
B1	2nd Pressure port/additional port
MB1	Measuring port operating pressure NG250/355: G1/4 NG 40/71/125/180: Blind flange attached to B1 with pressure measuring port G1/4
Z	external pilot oil pressure

Important notes on external supply:

In the case of an actuating system with external supply, the pump adjustment will - in case of voltage failure - not switch to zero stroke but to the negative stop (displacement of 100 % flow from the system to the tank). With an active fault message, it is imperative that the machine control reacts (e. g. switching off the drive motor of the pump, interrupting the external supply of the actuating system). The command values for pressure and flow must always be greater than zero (pcommand ≥ 3 bar, αcommand ≥ 5 %) as due to drift or tolerances, there is no exact "zero" pressure or "zero" swivel angle. Under unfavorable conditions, smaller command value presettings can lead to cavitation. The actual pressure value must not be less than 10 bar for more than 10 minutes (lubrication).

Allocation of connector or mating connector and cable set

X1: Central connection

Mating connector according to EN 175201-804 (12-pole), for the ordering code, see Accessories.

Pin	Signal	Description	Signal direction	Type of signal	Allocation in the cable set (accessories)
1	+ UB	Voltage supply	IN	24 V DC	1	Supply line 3 x 1.0 mm2
2	0 V = L0	Reference potential for the voltage supply	–		2
PE	Earth	Earthing connection for the electronics	–		green/yellow
3	Fault	Signals faults, e.g. cable break command / actual values, controller monitoring (logic 0 = error)	OUT	logic 24 V	white	Supply line 10 x 0.14 mm2 shielded (one end of the shield must be connected to the control!)
4	M0	Reference potential for analog signals	–		yellow
5	αCommand	Swivel angle command value	IN	analog ±10 V	green
6	αActual	Actual swivel angle value, normalized	OUT	analog ±10 V	Violet
7	pCommand	Pressure command value	IN	analog 0...10 V 1)	pink
8	pActual	Actual pressure value, normalized	OUT	analog 0...10 V	red
9		Function dependent on electronic type and additional function, see table Functions at pin 9			brown
10	Actual pressure value H	Actual pressure value input: Signal level dependent on feature 14 of the ordering codes Reserved with type "F" (0.5...5 V)	IN	analog	black
11	Actual pressure value L		–	analog	blue
n.c.					gray

1)	When using a pressure transducer with raised zero point (e. g. 4 ... 20 mA), a voltage of –1 ... –2.5 V will be output in case of a cable break.

Functions at pin 9

Pin	Additional function	Function dependent on feature 12 of the ordering codes (see page type key pilot and preload valve)	Signal direction	Type of signal
9	-..A…	Selecting a different oil volume adjustment (switch TD)	IN	logic 24 V
	-..B…	Power limitation active	OUT	logic 24 V
	-..C…	Command value of power limitation	IN	analog 0...10 V
	-..D…	Switch off pressure controller	IN	logic 24 V

X2: Connection of pressure transducer HM 20 HM 20-2X/315-F-C13-0,5 (cable version) (mating connector M12)

Top view mating connector

Pin	Signal HM 20	Pin
1	OUT, +UB	2	n.c.
3	Reference L0
4	IN, analog, 0.5 to 5 V DC	5	n.c.

The unit dimensions of the base pump (axial piston variable displacement pump A4VSO) are contained in data sheet 92050.

Dimensions in mm

1	Space required to remove the mating connector
2	Port Z (for version SYHDFE.-1X...0576)
3	Connection X2 (pressure transducer HM 16) is available with actual pressure value input F

Size	A1	A2	A3	A4	A5	A6	A7	A8	A9	A10
Size	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
40	239	80	127	130	104	125	160	15	227	325
71	256	92.5	141	149	127	140	180	15	254	352
125	291	112.5	171	177	147	160	200	20	310	421
180	291	116	171	177	147	160	200	20	318	421
250	339	144	207	212	179	224	280	24	380	483
355	339	144	207	212	179	224	280	24	393	575

Shaft ends:

Size	Shaft Ø	= P 1)	= Z 2)
Size	mm
40	32	AS 10x8x56	W 32x2x14x9g
71	40	AS 12x8x68	W 40x2x18x9g
125	50	AS 14x9x80	W 50x2x24x9g
180	50	AS 14x9x80	W 50x2x24x9g
250	60	AS 18x11x100	W 60x2x28x9g
355	70	AS 20x12x100	W 70x3x22x9g

1)	Cylindrical with fitting key DIN 6885
2)	Splined shaft profile DIN 5480

Through-drive "K99"

The control systems of size 40 to 71 are partly supplied with through-drive K99.

Their advantage is that the through-drive can be subsequently modified. By simply exchanging the intermediate flange and the hub, the through-drive can be adjusted to the on-site requirements.

The assemblies as exchange kits can be ordered separately, see "Accessories for through-drives" as well as data sheet 95581.

Small centering diameters are directly worked into the pump subplate. Subsequent modification is not possible. Please note the type key under ordering code and the overview under "Accessories for through-drives". Hubs for through-drives can be ordered separately.

Size 40 to 71

with through-drive shaft, without hub, without intermediate flange, closed by means of a pressure-resistant cover in a fluid-tight way

Dimensions in mm

Size	A1	A2	A4		A5	A6		A7		A8		A9	A10	A11		⌀A12		⌀A13		⌀A14		⌀A15	A16	A17	Splined shaft profile DIN 5480	1)O-ring for subsequent attachment (not included in the scope of delivery)
Size	mm	mm	mm	mm		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm		mm		mm	mm	mm	mm	mm		mm
40	263	280	51.3	± 1	M12; 25 mm deep	37	+ 0.2	37	+ 0.2	0	- -	18	9	2.3	+ 0.1	118	H7	105	g6	97.6	- 0.4	52	44	14	W25 x 1,25 x 18 x 9 g	99 x 3
71	291	310	48	± 1	M12; 25 mm deep	42.3	+ 0.15	45	+ 0.15	15.4	- ± 15	18	9	2.7	+ 0.1	130	H7	116	g6	106.4	- 0.4	63	38	16	W30 x 1,25 x 22 x 9 g	110,72 x 3,53

Through-drive "U99"

The control systems of size 125 to 355 are supplied with universal through-drives U99.

Their advantage is that the through-drive can be subsequently modified. By simply exchanging the intermediate flange and the hub, the through-drive can be adjusted to the on-site requirements.

The assemblies as exchange kits can be ordered separately, see "Accessories for through-drives" as well as data sheet 95581.

Size 125 to 355

with through-drive shaft, without hub, without intermediate flange, closed by means of a pressure-resistant cover in a fluid-tight way

Size	A1	A2	A4		A5	A6		A7	A8		A9		ØA10		A12	A13		ØA14		ØA15	A16	A17	A18		Splined shaft profile DIN 5480	1)O-ring for subsequent attachment (included in the scope of delivery)
Size	mm	mm	mm	mm		mm	mm		mm	mm	mm	mm	mm		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm		mm
125	347	368	49.7	± 1	M14; 15 deep	33.2	+ 0.15 0	M12; 18 deep	-	- -	79.2	+ 0.15 0	118	H7	9	2.8	+ 0.2 0	121	+ 0.1 + 0	70	46	22	-	- -	W35 x 1.25 x 26 x 9 g	118 x 2
180	371	392	49.7	± 1	M14; 15 deep	33.2	+ 0.15 0	M12; 18 deep	-	- -	79.2	+ 0.15 0	118	H7	9	2.8	+ 0.2 0	121	+ 0.1 + 0	70	46	25	-	- -	W35 x 1.25 x 26 x 9 g	118 x 2
250	431	455	61.4	± 1	M20; 22 deep	44.5	+ 0.15 0	M10; 15 deep	58.15	+ 0.15 0	86.2	+ 0.15 0	160	H7	9	2.8	+ 0.2 0	163	+ 0.1 + 0	87	64	30.5	86.2	+ 0.15 0	W42 x 1.25 x 32 x 9 g	160 x 2
355	460	487	61.4	± 1	M20; 22 deep	44.5	+ 0.15 0	M10; 15 deep	58.15	+ 0.15 0	86.2	+ 0.15 0	160	H7	9	2.8	+ 0.2 0	163	+ 0.1 + 0	87	64	34	86.2	+ 0.15 0	W42 x 1.25 x 32 x 9 g	160 x 2

UB3

Flange ISO 3019-2 100, 2-hole

Hub for splined shaft, 22-4 SAE B, 7/8 ″, 16/32 DP; 13T 2)

for attaching an A10VSO 28/31 splined shaft S (see data sheet 92711)

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1		A3		A4		A5		A6 1)
Size	mm		mm		mm		mm
125	369	-	20.5	-	24.9	-	10	-	M12
180	393	-	20.5	-	24.9	-	10	-	M12
250	-	in preparation	-	in preparation	-	in preparation	-	in preparation	in preparation
355	-	in preparation	-	in preparation	-	in preparation	-	in preparation	in preparation

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

UB4

Flange ISO 3019-2 100, 2-hole

Hub for splined shaft, 25-4 SAE B-B, 1 ″, 16/32 DP; 15T 2)

for attaching an A10VSO 45/31 splined shaft S (see data sheet 92711)

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	18.9	29.5	10	M12
180	393	18.9	29.5	10	M12
250	453	20.9	29.5	10	M12
355	482	20.9	29.5	10	M12

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

UB8

Flange ISO 3019-2 160, 4-hole

Hub for splined shaft, 32-4 SAE C, 1 1/4 ″, 12/24 DP; 14T 2)

for attaching an A10VSO 71/32 splined shaft S (see data sheet 92714)

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1		A3		A4		A5		A6 1)
Size	mm		mm		mm		mm
125	-	in preparation	-	in preparation	-	in preparation	-	in preparation	in preparation
180	-	in preparation	-	in preparation	-	in preparation	-	in preparation	in preparation
250	453	-	20.9	-	38	-	9	-	M16
355	-	in preparation	-	in preparation	-	in preparation	-	in preparation	in preparation

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

UB7

Flange ISO 3019-2 180, 4-hole

Hub for splined shaft, 44-4 SAE D, 1 3/4 ″, 8/16 DP; 13T 2)

for attaching an A10VSO 140/31(32) splined shaft S (see data sheet 92711 (RE 92714))

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

1) Mounting screws and O-ring seal are included in the scope of delivery

2) according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
180	406	10.6	62	9	M16
250	453	10.6	64	9	M16
355	482	10.6	4	9	M16

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U34

Flange ISO 3019-2 160, 4-hole

Hub according to DIN 5480 N50x2x24x8H

for attaching an A4VSO/G 125 or 180 splined shaft

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	12.5	51.6	9	M16
180	393	12.5	51.6	9	M16
250	453	12.5	54	9	M16
355	482	12.5	54	9	M16

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U35

Flange ISO 3019-2 224, 4-hole

Hub according to DIN 5480 N60x2x28x8H

for attaching an A4VSO/G or A4CSG 250 splined shaft

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
250	469	12.6	75	9	M20
355	498	12.6	75	9	M20

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U77

Flange ISO 3019-2 224, 4-hole

Hub according to DIN 5480 N70x3x22x8H

for attaching an A4VSO/G or A4CSG 355 splined shaft

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed

Size 355

Before determining your design, please request a binding installation drawing.

U01

Flange ISO 3019-1 82-2 (SAE A)

Hub for splined shaft, 16-4 SAE A, 5/8 ″, 16/32 DP; 9T 2)

for attaching an external gear pump AZ-PF-1X-004 ... 022 (see data sheet 10089)

Rexroth recommends a special version of the gear pumps, please contact us

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	16	19.4	13	M10
180	393	16	19.4	13	M10
250	453	16	19.4	13	M10
355	482	16	19.4	13	M10

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U68

Flange ISO 3019-1 101-2 (SAE B)

Hub for splined shaft, 22-4 SAE B, 7/8 ″, 16/32 DP; 13T 2)

for attaching an external gear pump AZ-PN-1x020...032 (see data sheet 10091) or an A10VO 28/31 and 52(53) splined shaft S (see data sheet 92701 and 92703)

Rexroth recommends special versions of the gear pumps, please contact us

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	28	25	13	M12
180	393	28	25	13	M12
250	453	19.5	23.1	13	M12
355	482	19.5	23.1	13	M12

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U04

Flange ISO 3019-1 101-2 (SAE B)

Hub for splined shaft, 25-4 SAE B-B, 1 ″, 16/32 DP; 15T 2)

for attaching an A10VO 45/31 and 52 (53) splined shaft S (see data sheet 92701 and 92703) or an internal gear pump PGH4 (see data sheet 10223)

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	18.9	29.4	13	M12
180	393	18.9	29.4	13	M12
250	453	18.9	29.4	13	M12
355	482	18.9	29.4	13	M12

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed
	Before determining your design, please request a binding installation drawing.

U24

Flange ISO 3019-1 127-2 (SAE C)

Hub for splined shaft 38-4 SAE C-C, 1 1/2 ″, 12/24 DP; 17T 2)

for attaching an A10VSO 100/31 splined shaft S (see data sheet 92701) or an A10VO 85/52(53) splined shaft S (see data sheet 92703) or an internal gear pump PGH5 (see data sheet 10223)

Dimensions in mm

1)	Mounting screws and O-ring seal are included in the scope of delivery
2)	according to ANSI B92.1a-1976, 30° pressure angle, flat root, side fit, tolerance class 5

Size	A1	A3	A4	A5	A6 1)
Size	mm	mm	mm	mm
125	369	10.4	50	13	M16
180	393	10.4	50	13	M16
250	453	12.4	55	13	M16
355	482	12.4	55	13	M16

1)	Thread according to DIN 13, for the max. tightening torques, the installation information is to be observed

Command values may only be switched via relays with gold-plated contacts (low voltage, low currents) Always shield command and actual value cables. The distance to aerial lines or radios must be at least 1 m. Do not lay signal lines close to power lines. Amending notes on the SYHDFE control system can be found in the operating instructions (See section “Further information about this control system”).

Accessories for through-drives

Mounting kits for axial piston variable displacement pumps and SYHDFE control systems

The order numbers for the combination of pumps are contained in the table shown below and in the data sheet 95581.

Components universal through-drive U99	Main pump SYHDFE.-1X		Attachment pump
Components universal through-drive U99	NG125 NG180	NG250 NG350	Size and type		Through-drive Centering Hub	Flange designation
Mounting kit	R902447035	R902447037	NG18	SYDFE.-2X A10VSO / BR31 Shaft S or R	U52 82,55 mm 3/4 ″	SAE J744 82-1 (A-B)
Flange kit	R902446836	R902446850
Hub	R902446823	R902446843
Mounting kit	R902446996	R902446998	NG28		UB3 100 mm 7/8 ″	ISO 3019-2 100B2HW
Flange kit	R902446808	R902446809
Hub	R902446824	R902446844
Mounting kit	R902447001	R902447003	NG45		UB4 100 mm 1 ″	ISO 3019-2 100B2HW
Flange kit	R902446808	R902446809
Hub	R902446825	R902446845
Mounting kit	Upon request	Upon request	NG40	SYDFE.-3X A10VSO / BR32 Shaft S or R	UE1 125 mm 1 ″	ISO 3019-2 125B4HW
Flange kit	Upon request	R902446813
Hub	R902446825	R902446845
Mounting kit	R902447014	R902447016	NG71		UB8 160 mm 1 ¼ ″	ISO 3019-2 160B4HW
Flange kit	R902446816	R902446817
Hub	R902446826	R902443227
Mounting kit	R902447021	R902447022	NG100		UB9 180 mm 1 ½ ″	ISO 3019-2 180B4HW
Flange kit	R902446818	R902446820
Hub	R910943555	R910921237
Mounting kit	R902447025	R902447026	NG140		UB7 180 mm 1 ¾ ″	ISO 3019-2 180B4HW
Flange kit	R902446818	R902446820
Hub	R910904588	R902446849
Mounting kit	R902447010	R902447011	NG40	SYHDFE-1X A4VSO / BR30 Shaft Z	U31 125 mm W 32x2x14x9g	ISO 3019-2 125B4HW
Flange kit	R902446812	R902446813
Hub	R902446828	R902446846
Mounting kit	R902447012	R902447013	NG71		U33 140 mm W 40x2x18x9g	ISO 3019-2 140B4HW
Flange kit	R902446814	R902446815
Hub	R902491155	R902446847
Mounting kit	R902447019	R902447020	NG125 NG180		U34 160 mm W 50x2x24x9g	ISO 3019-2 160B4HW
Flange kit	R902446816	R902446817
Hub	R902446848	R902446830
Mounting kit		R902447028	NG250		U35 224 mm W 60x2x28x9g	ISO 3019-2 224B4HW
Flange kit		R902446822
Hub		R910902972
Mounting kit		R902447029	NG355		U77 224 mm W 70x3x22x9g	ISO 3019-2 224B4HW
Flange kit		R902446822
Hub		R910941327

Components universal through-drive K99	Main pump SYHDFE.-1X		Attachment pump
Components universal through-drive K99	NG40	NG71	Size and type		Through-drive Centering Hub	Flange designation
Mounting kit		R902546965	NG18	SYDFE.-2X A10VSO / BR31 Shaft S or R	K52 82,55 mm 3/4 ″	ISO 3019-1 82-2
Hub	R910944344 Tooth hub for KC1		NG18		K52 82,55 mm 3/4 ″	ISO 3019-1 82-2
Mounting kit	R902488855		NG28		KB3 100 mm 7/8 ″	ISO 3019-2 100B2HW
Hub		R910987983 Tooth hub for KD3	NG28		KB3 100 mm 7/8 ″	ISO 3019-2 100B2HW
Mounting kit	Upon request	Upon request	NG45		KB4 100 mm 1 ″	ISO 3019-2 100B2HW
Mounting kit		R902543215	NG45	SYDFE.-3X A10VSO / BR32 Shaft S or R	KE1 125 mm 1 ″	ISO 3019-2 125B4HW
Mounting kit		R902543416	NG71	SYDFE.-3X A10VSO / BR32 Shaft S or R	KB8 160 mm 1 ¼ ″	ISO 3019-2 160B4HW
Mounting kit	R902425118	R910904879	NG40	SYHDFE-1X A4VSO / BR10 Shaft Z	K31 125 mm W 32x2x14x9g	ISO 3019-2 125B4HW
Mounting kit		R902403972	NG71	SYHDFE-1X A4VSO / BR10 Shaft Z	K33 140 mm W 40x2x18x9g	ISO 3019-2 140B4HW

The following conditions apply to the attachment pumps listed in the table:

PGH with shaft R, flange U2, see data sheet 10223 PGF3 with shaft J, flange U2, see data sheet 10213 AZPF with shaft R, front cover R, see data sheet 10089

Also note that the flange and the through-drive (see ordering code) are identical. Check in the current data sheet of the gear pump whether the shaft ends have the specified dimensions.

Components universal through-drive	Main pump SYHDFE.-1X		Attachment pump
Components universal through-drive	NG125 NG180	NG250 NG350	Size and type	Through-drive Centering Hub	Flange designation
Mounting kit	R902447030	R902447032	PGF2, PGH2, PGH3, AZPF	U01 82,55 mm 5/8 ″	SAE J744 82-2(A-B)
Flange kit	R902446836	R902446850
Hub	R902446831	R902497505
Mounting kit	R902447040	R902447042	PGF 3	U68 101,6 mm 7/8 ″	SAE J744 101-2(B)
Flange kit	R902446837	R902446851
Hub	R902446824	R902446844
Mounting kit	R902447045	R902447047	PGH 4	U04 101,6 mm 1 ″	SAE J744 101-2(B)
Flange kit	R902446837	R902446851
Hub	R902446825	R902446845
Mounting kit	R902447052	R902447053	PGH 5	U24 127 mm 1 ½ ″	SAE J744 127-2(B)
Flange kit	R902446838	R902446852
Hub	R910943555	R910921237

Components universal through-drive	Main pump SYHDFE.-1X		Attachment pump
Components universal through-drive	NG40	NG71	Size and type	Through-drive Centering Hub	Flange designation
Hub	R910944342 Tooth hub for KC1	R910944356 Tooth hub for KC1	PGF2, PGH2, PGH3, AZPF	K01 82,55 mm 5/8 ″	ISO 3019-1- 82-2

Hubs for standard electric motor coupling

Coupling with gear rim for ambient temperatures up to 80 °C, e.g. for motor assemblies with IM V1 motor.

Motor		SYHDFE.-1X		Z-Wave
Frame size/characteristic	Shaft diameter	NG71 Shaft 40 mm W40x2x18x9g	NG125/180 Shaft 50 mm W50x2x24x9g	NG250 Shaft 60 mm W60x2x28x9g	NG355 Shaft 70 mm W70x3x22x9g


225/0	60	R900026054	R900026055
250/0	65	R900026058	R900026059
280/0	75	R900026062	R900026063	R900714636
315/0	80	R901037250	R901076760	R900088584 1)	R900210961 1)
315/1	80		R900026068	R900783295	R900210960

1)	Up to 40 °C

Accessories

Version 12/2014, enquire availability

Accessories	Material number	Data sheet
Mating connector 12-pole for central connection X1 without cable (assembly kit)	R900884671	08006
Mating connector 12-pole for central connection X1 with cable set 2 x 5 m	R900032356
Mating connector 12-pole for central connection X1 with cable set 2 x 20 m	R900860399
Pressure transducer HM 20-2X, measurement range 315 bar (4 ... 20 mA)	R901342029	30272
Pressure transducer HM 20-2X, measurement range 315 bar (0.1 ... 10 V)	R901342030	30272
Test device VT-PDFE-1-1X/V0/0	R900757051	29689-B
Compact power supply unit VT-NE32-1X	R900080049	29929
More accessories
Accessories for through-drives		see Accessories, section "Accessories for through-drives"
Torsionally flexible couplings for attachment to a standard electric motor		see Accessories, section "Hubs for standard electric motor coupling"

Spare parts & repair

SYHDFEE-1X/355R-VZB25U99-0576-A0A1V

Manufacturer: Bosch Rexroth

Material #: R978052721

Model : SYHDFEE-1X/355R-VZB25U99-0576-A0A1V

More are expected on May 23, 2025

This product is eligible for factory repair.

Ordering code pump combination SYHDFEE-1X

Example of a name plate

mechanic and hydraulic

Admissible load ‒ determination of nominal load and minimum speed

electrical

Control loop quality

Through-drives: Torques

Distribution of the torques

Admissible mass torque

Transition function with pressure command value step with spool design "A"

Transition function with swivel angle command value step with spool design "A"

Size 40, 71 p = 100 bar

Size 125 p = 100 bar

Size 180 p = 100 bar

Size 250 p = 100 bar

Size 355 p = 100 bar

Schematic diagram: Actuating system supplied internally

Schematic diagram: Actuating system supplied externally

Allocation of connector or mating connector and cable set

X1: Central connection

Functions at pin 9

X2: Connection of pressure transducer HM 20 HM 20-2X/315-F-C13-0,5 (cable version) (mating connector M12)

Shaft ends:

Through-drive "K99"

Through-drive "U99"

UB3

UB4

UB8

UB7

U34

U35

U77

U01

U68

U04

U24

Accessories for through-drives

Hubs for standard electric motor coupling

Accessories

Version 12/2014, enquire availability

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