Rexroth

Rexroth A4VG series hydraulic pump spare parts

The Rexroth A4VG series is a high-performance swashplate axial piston variable pump, mainly applied in hydrostatic transmission systems of closed circuits. It is renowned for its compact structure, high power density and diverse control methods, and is widely used in various heavy machinery and industrial fields.

◆Place of Origin  

China

◆Brand Name  

HYH

◆Model Number

A4VG28 A4VG40 A4VG45 A4VG56 A4VG71 A4VG90 A4VG100 A4VG105 A4VG110 A4VG125 A4VG140 A4VG145 A4VG175 A4VG180 A4VG250 A4VG500

◆Minimum Order Quantity

1Set

◆Packaging Details        

Paper and wooden packing

◆Delivery Time                

1-4Working Days

◆Payment Terms                 

T/T, Western Union, L/C


Description

Parameter details

●Series and Parameters:A4VG series is mainly divided into Series 32 and Series 40.

· Series 32:Smaller specifications (such as 28,40,56,71,90,125), rated pressure 400 bar, maximum pressure 450bar.

· Series 40:specifications are relatively large (such as 110,125,145,175, 210,280), with a rated pressure of 450 bar and a maximum pressure of 500 bar. Here, "specification" usually refers to displacement (cc/rev).

●Control mode: This is a major feature of the A4VG series, allowing the pump's output flow to change steplessly according to different input signals

·HW(Manual Servo Control): The displacement is controlled by manually adjusting the handle Angle.

·HD(Hydraulic Proportional Control): The displacement is proportional to the pilot control oil pressure.

·EP(Electro-Proportional Control): The displacement is proportional to the current signal input to the proportional electromagnet.

·EZ(Electronic Two-Point Control): Switch between two preset metric values.

·DA(Automatic Control Related to Speed): The displacement is automatically matched with the drive speed.

·DG(Hydraulic Direct Control)

●Pressure protection: A4VG pump is equipped with multiple built-in pressure protection mechanisms

·Pressure cut-off valve: This is the standard configuration. It limits the maximum working pressure of the system by reducing the displacement, achieving constant pressure control, and its energy efficiency is higher than that of overflow.

·High-pressure safety valve (safety relief valve): Installed on the rear cover of the pump, both A and B high-pressure ports are equipped. It is mainly used to relieve pressure shock. The set pressure of a safety valve is usually about 30 bar higher than that of a pressure shut-off valve.

·chargf pump: Crucial for closed circuits, it is used to compensate for system leakage and provide a control oil source. It is usually built-in. Its pressure is limited by the built-in make-up oil overflow.


Selection and application suggestions

When choosing Rexroth A4VG series hydraulic pumps, in addition to paying attention to basic parameters such as displacement and pressure, it is also necessary to consider:

1. Application scenarios: Clarify the type of equipment and working conditions (such as the slewing mechanism of excavators, concrete pump trucks)

2. Control mode: Select the appropriate variable control mode based on the system control requirements (manual, hydraulic control, electronic control, etc.).

3. Requirements for closed systems: Confirm whether the system needs an oil replenishment pump and the corresponding flushing valve function.

4. Quality and After-sales Service: Select regular channels and qualified suppliers to ensure product quality and after-sales support.


Key Component Assembly

Rotating Group:

1.Ensure pistons slide smoothly into thecylinder block bores without sticking 

2.Install the retraction plate and ball pivotsauarely and securely, ensuring the pistonslippers are properly seated 

3.The center spring must be preloaded evenly to ensure the cylinder bloc kmaintains contact with the port plate,especially during low-pressure cycles 

Port Plate and Cylinder Block: 

 This is a precision-matched pair  .Never interchange the original port plate and cylinder block with those from another pump Before assembly, inspect the matinc

surfaces on both for smoothness, and freedom from wear, scoring (bluing), or warping.

Variable Mechanism (e.g., HD hydraulic control,EP electro-proportional control):

1.Ensure the servo piston moves freely in its bore without sticking.

2.For control valve spools,ensure they slide smoothly within the valve body and reset correctly.

3.For electricaly controlled pumps, ensure reliable connection of solenoid plugs 

Charge Pump:The A4VG pump typically has an internal charge pump 

1.When assembling the gear set, ensure the gears rotate freely within the housing and that the axia clearance meets

2.Pay attention to the setting of the charge pressure relief valve (e.g., 35 bar)

Rear Cover and Seals:

1.Before installing the rear cover, replace all seals(O-rings, gaskets, shaft seals,etc.)with new ones and ensure they are properly seated to prevent leaks

2.When tightening rear cover and various cover plate bolts, always use a torque wrench and tighten gradualy in a cross pattern to the manufacturer's specified

torque values This prevents distortion of mating surfaces and leaks.

Model                                                                                   Part number                        Model
A4VG28 R909650120 | R909156579 | R909449134 | R909415375 | R902080134 | R909830517 | R909443447 | R902006253 | R909413556 | R902025647 | R909153245 | R909439861 | R909449509 | R902066234 | R909422134 | R909431514 | R909156096 | R902136754 | R902037329 | R902066597 | R909156625 | R902121243 R909443586 | R909085360 | R909449291 | R909413920 | R909156605 | R909415265 | R909431343 | R909444491 | R909431540 | R909651164 | R909651221 | R909443284 | R909600949 | R902601818 | R909153249 | R909444151 | R90213271Hitachi 40LX | O&K RH5
A4VG40R902205287 | R909443447 | R902080211 | R913016373 | R902025645 | R909444490 | R909449134 | R902603726 | R909606688 | R913002054 | R909435304 | R902114380 | R902037406 | R902079297 | R909156606 | R902121235 | R902006254 | R902080134 | R902601819 | R909449754 | R909408786 | R909432260 R902066234 | R909435775 | R909153685 | R913037188 | R909424648 | R902007624 | R902205450 | R902055424 | R902603433 | R909157518 | R909156579AMMANN ARX40 | Volvo
A4VG45 R909432260 R909432098 R902603726 R902066234 R902066234 R909444947 R909430367               R909430367  R902002484 R987054641 R909830383 R902136754 R902121235 
A4VG56 R909830424 | R909443447 | R909830379 | R909449135 | R902025649 | R913016373 | R909156259 | R902079414 | R909426789 | R909414949 | R909436102 | R902037394 | R909831304 | R909606385 | R902079392 | R902042768 | R909449590 | R909408786 | R909449683 | R909432991 | R909650370 | R909606391 R902079461 | R902273785 | R909650367 | R909609337 | R909445274 | R909449607 | R902006256 | R909449684 | R909445401 | R902132713 | R909445275 | R902066592 | R909449685 | R909449544 | R902601649 | R902130340 | R909609457 | R909413479 | R902079384 | R909831182 | R902042592 | R902601678 | R902252428 | R902020948 | R902013220 | R909156579 | R909432992 R909432993 | R909430600 | R902079268Venieri | Liebherr L509 | Liebherr L34 | CATM318D
A4VG71R909085947 | R909076233 | R913016373 | R909416736 | R902095516 | R909443972 | R909426654 | R902601794 | R909830152 | R902006245 | R909153104 | R909428137 | R909449810 | R902007627 | R909921902 | R909921936 | R909606659 | R909443361 | R902077946 | R909921905 | R902066586 | R909449136 R909921938 | R902025649 | R902077959 | R909921935 | R909449714 | R909921901 | R909921904 | R902077997 | R902013157 | R902079247 | R909430319 | R902006258 | R909086679 | R902003862 | R902100257 | R902055261 | R909156579 | R987053886WB98A-2 | CAT K3 | САТ D4G | HAMM WA150
A4VG90  R909830300 | R909922255 | R909449810 | R902077765 | R909606805 | R909153104 | R909414515 | R902025649 | R909449714 | R902018860 | R909921550 | R902007629 | R909083825 | R902081964 | R909606810 | R913016373 | R909417959 | R902601820 | R902066593 | R909449136 | R902260552 | R909650371 R902077790 | R902192958 | R909921549 | R909921729 | R909921730 | R909830165 | R902077818 | R902006258 | R902100269 | R902193306 | R902041530 | R902603518 | R902079851 | R902095526 | R902066587 | R902203272 | R909606811 | R909156579 | R909435790 | R90992172Liebherr | Volvo 450 | JohnDeere 1010B | Bomag BC771RS | Bomag BC972RB
A4VG105  R909449136 | R902077817 | R902006258 | R902025656 | R909083825 | R902077762 | R902095526 | R902230973 | R902064146 | R902068149 | R909153104 | R902066587 | R902260552 | R902603518 | R902087648 | R909921550 | R902132711 | R902205452 | R902113678 | R902064149 | R902601820 | R902077790 R909830300 | R909606810 | R902025651 | R902192958 | R909449810 | R909606805 | R902195225 | R913016373 | R909417959 | R902047744+R909606805 | R902064143 | R909435790 | R909156579
A4VG110 

R902603178 R902603576 R902114099 R902127870 R902118914 R902205115 R902167488 R902240832 R902121025 R902205414

 

SET PLATE
A4VG125 R909154427 | R909449034 | R902113679 | R909432773 | R902104670 | R909830217 | R902113940 | R902078044 | R902078119 | R902105557 | R909921708 | R902076829 | R902105527 | R902066594 | R902078000 | R902097706 | R909421418 | R902601923 | R902215658 | R902118633 | R902066601 | R902192959 R909449063 | R909921707 | R909921719 | R909432264 | R902601821 | R902073038 | R902008140 | R902071444 | R909830578 | R902603914 | R902071474 | R909435465 | R902006261 | R909157881 | R902056896 | R909083412 | R902010336 | R902049851 | R909613640 | R902041630 | R902260554 | R909445122 | R987053882RL-200FS | John Deere | Liebherr
A4VG140 R902078119 | R909921707 | R902272221 | R909449063 | R902027760 | R902100875 | R902601923 | R909421418 | R902192959 | R902105528 | R902603914 | R902226713 | R902066601 | R902006261 | R902056896 | R902205413 | R902105940 | R902058965 | R902195227 | R909083412 | R909921708 | R909449034 R902157505Timberjack 1110D | Ecolog 574 | JohnDeere 1210E | Ecolog 574C
A4VG175 R902087969 R902222773 R902244326 R902273728 R902603910
    A4VG180R902027761 | R909403549 | R909449063 | R902071444 | R909449034 | R909157194 | R909606229 | R909606246 | R902601822 | R909083412 | R902071476Timberjack, Putzmeister 534539
    A4VG250R902013284 | R909443013 | R902007245 | R902156524 | R902029548 | R902252299 | R909831574 | R902436846 | R913027013 | R902005053 | R902601823 | R902002393 | R909153512 | R902005070 | R902005054 | R902062446 | R902249003 | R902004761 | R902252353 | R902400658 | R902029568 | R902439436 R902439646 | R902022874 | R902400666 | R902009187 | R902066596 | R909403549 | R902029541 | R909083834 | R902005056 | R902079510 | R909083419 | R902600958
   



HENGYUHANG Company  is a set design, production, sales in one of the hydraulic components production company, the company has advanced hydraulic components manufacturing technology and technology, the use of high-precision equipment CNC machining center, gear hot processing automatic production line, , automatic heat treatment multi-purpose furnace, single-piece flow assembly line, automatic hydraulic pump performance test bench. Intelligent equipment adopts automatic unmanned production, and realizes online measurement to ensure product consistency and reliability, intelligent system uses ERP, MES management software, improve production efficiency, and achieve product traceability.

1.Part name

Item No.Name & DescriptionQTY (pcs)Remark
1 DRIVE SHAFT1SHAFT
2 PISTON SHOE9
3 BALL GUIDE1
4 FIX PLATE2
5 SOCKET BOLT4
6 VALVE PLATE1PORT PLATE
7 THRUST PLATE1SHOE PLATE
8 SPACER2
9 RETAINER PLATE1SET PLATE
10 SHIM1
11 DISK SPRING4
12 CYLINDER BLOCK1BARREL

微信图片_20250711165149

2.Spare parts of other brands

We Supply Various Pump Assy & Spare Parts

Can Provide More Specifiions & Dimensions, If You Need it.

KAWASAKIREXROTHEATON
K3SP36C K7SP36C /K3V45
K3V63 K3V112 K3V140 K3V180
K3V280 K4V45/K3VL28 K3VL45
K3VL63 K3VL80 K3VL80 K3VL112
K3VL140 K3VL200/K7V63
K7V100 K7VG180 K7VG265/K5V80
K5V140 K5V160 K5V180
K5V200/K3VG63 LZV180 LZV260
LZV500

A4VSO40 A4VSO45 A4VSO50 
A4VSO56 A4VSO71 A4VSO125
A4VSO180 A4VSO250 A4VSO355
A4VSO500 A4VSO750
A4VSO1000/A4VG28 A4VG40
A4VG56 A4VG71
A4VG90 A4VG125 A4VG180
A4VG250/A4V40 A4V56 A4V71
A4V90 A4V125 A4V250 A4V0130

33/39/46/54/64/76
70122/72400/78461/78462
PVXS060 PVXS090 PVX130
PVX180 PVX250 PVE12 PVE19
PVE21 TA19 MFE19 PVM018
PVM020 PVM045 PVM050
PVM057 PVM063 PVM074 PVM081 PVM098 PVM106 PVM131 PVM141 PVB5 PVB6 PVB10
CATKomatsuHitachi
SBS80 SBS120 SBS140
( 345 320 325) SPK10 /10(E200B) SPV10/10(MS180)/320)
VRD63(120)/E200B/ 200B/E207D/ 207D/E70B
70B E308 12G 14G 16G 120G 140G 215 225 235 245 320B 330B 345 355D E200B AP-12
HPV75 HPV95 HPV132 HPV140
HPV165 /PC60-7 PC220-6 PC200-7
PC300-6 PC300-7 PC360-7 PC400-7
PC400-6/PC600-7/PC400-7/PC60-8
PC70-8 PC75UU PC78US-6/PC40-8
PC2000-8/PC3000-8/PV200-6 P200-7
PC300-6 PC300-7
HMV110 HMV160/KMF40 PC160-7
HPV050 HPV102 HPV105
HPV118 HPV135/HPV116 HPV145/HPV125B HPVUHO7
HPV083 HMT125AE/HMGC16
HMGC32 HMGC48/HMGF35
HMGF36 HMGF38 HMGF57
HPK055 EX120-6/AP5S53
AP5S67 EX100 EX100-2
EX100-3 EX100-5 HMGF95/ZX330
LIEBHERRKYBTOSHIBA
LPVD35 LPVD45 LPVD64 LPVD75 LPVD90 LPVD100 LPVD125 LPVD140 LPVD165 LPVD225 LPVD250 FMV075 FMV100 LMF45 LMF64 LMF75 LMF90 LMF100
LMF125 LMF140 LMV45 LMV64 LMV75 LMV90
PSVD2-13E PSVD2-16E PSVD2-17E
PSVD2-19E PSVD2-21E PSVD2-26E
PSVD2-27E PSVD2-57E PSV2-55T
PSV2-62T PSV2-63T PSVH-45CS
PSVS37 PSVS90 PSV-10 PSV-16
PSV-37C PSV2-10 PSV2-16
PSVL-36 PSVL-42 PSVL-54
PVB80 PVB90 PVC80 PVC90 TADANO100 PAVA8282 PAVA6565 LUCUS400 LUCUS500 HD450V-2 SG015 SG02 SG025 SG04 SG08
SG12 SG15 SG17 SG20 SG25
MFB80 MFB100 MFB150 MFB160 MFB170 MFB180 MFB190 MFB200


About us

FAQ

1. who are we?

We are based in Fujian, China, start from 2018,sell to South Asia(30.00%),South America(7.00%),Eastern Europe(7.00%),Mid East(7.00%),North America(6.00%),Southeast Asia(5.00%),Africa(5.00%),Western Europe(5.00%),Central America(5.00%),Northern Europe(5.00%),Southern Europe(5.00%),Domestic MA 50% advance payment is supportedarket(5.00%),Oceania(4.00%),Eastern Asia(4.00%). There are total about 11-50 people in our office.

2. How can we guarantee quality?

Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?

Hydraulic pump manufacturing, hydraulic pump parts, hydraulic motors, vane pumps, plunger pumps, hydraulic valves, gear pumps

4. why should you buy from us not from other suppliers?

HENGYUHANC Hydrauics (also caled HYH Hydraulcs), We are a company that focuses on the Internet,  supplemented by entities,  and simultaneously sells online and offline.  Construction machinery trading company focusing on hydraulic parts and  maintenance parts.

5. what services can we provide?

Accepted Delivery Terms: FOB,CIF,EXW,Express Delivery;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Portugues,Chinese

6. Payment terms?

A 50% advance payment is supported

7. Warranty period?

12months


RELATED PRODUCTS

Get a Quote

HENGYUHANG Power Technology Co., LTD

Location

No. 173, Xiacuo, Sihuang Village, Xiamei Town, Nan 'an City, Fujian Province

Make a Call

+86 19918575358

WhatsApp Email +86 19918575358