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{"title":"A4VSO355LR2\/30R-PZB13N00A4VSO355LR2\/30R-VPB13N00A4VSO355LR2\/30R-PPB13N00Rexroth","imgUrl":"https:\/\/img.chinax.com\/nimg\/7f\/02\/190692f76a047791379246c44d9e-200x200-1\/a4vso355lr2_2f30r_pzb13n00a4vso355lr2_2f30r_vpb13n00a4vso355lr2_2f30r_ppb13n00rexroth_germany_imported_axial_piston_pump_0a.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A4VSO355LR2\/30R-PZB13N00A4VSO355LR2\/30R-VPB13N00A4VSO355LR2\/30R-PPB13N00","Certification":"ISO","Place of Origin":"Germany"}}
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{"title":"A4VSO40EO1\/10R-VPB13N00A4VSO40EO1\/10R-PPB13N00A4VSO40LR2\/10R-VPB25N00Rexroth","imgUrl":"https:\/\/img.chinax.com\/nimg\/b4\/b7\/ab03500d1fba5ffcb34accb314a2-200x200-1\/a4vso40eo1_2f10r_vpb13n00a4vso40eo1_2f10r_ppb13n00a4vso40lr2_2f10r_vpb25n00rexroth_axial_mechanical_piston_pump_imported_from_germ.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A4VSO40EO1\/10R-VPB13N00A4VSO40EO1\/10R-PPB13N00A4VSO40LR2\/10R-VPB25N00","Certification":"ISO","Place of Origin":"Germany"}}
{"title":"A4VSO71LR2G\/10R-VPB25N00A4VSO40DFR\/10R-PPB13N00A4VSO40LR2G\/10R-VPB25N00Rexroth","imgUrl":"https:\/\/img.chinax.com\/nimg\/15\/ee\/ed20d37d7033fe768c78acf40b46-200x200-1\/a4vso71lr2g_2f10r_vpb25n00a4vso40dfr_2f10r_ppb13n00a4vso40lr2g_2f10r_vpb25n00rexroth_a4vso_series_axial_piston_variabledisplacemen.jpg","attrs":{"Brand Name":"Rexroth","Model Number":"A4VSO71LR2G\/10R-VPB25N00A4VSO40DFR\/10R-PPB13N00A4VSO40LR2G\/10R-VPB25N00","Certification":"ISO","Place of Origin":"German"}}
A4VSO125DRG/22R-PPB13N00 A4VSO40LR2G/10L-PPB13N00 A4VSO71LR2/10R-VPB25N00 German Rexroth mechanical industrial equipment hydraulic axial piston pump imported with original packaging
Item
Specification
Brand Name
Rexroth
Place of Origin
Fujian, China
Warranty
12 Months
Video Outgoing-Inspection
Provided
Machinery Test Report
Provided
Application
Machinery Repair Shops
Material
Iron
Condition
Original
Function
Filter Diesel Oil
Power
Hydraulic Power
A4VSO355DFR/30R-PPB13N00
A4VSO355LR2G/30R-VPB25N00
A4VSO355LR2G/30R-VZB13N00
A4VSO355LR2G/30R-PZB13N00
A4VSO355LR2G/30R-VPB13N00
A4VSO355LR2G/30R-PPB13N00
A4VSO355DR/30R-VPB25N00
A4VSO355DR/30R-VZB13N00
A4VSO355DR/30R-PZB13N00
A4VSO355DR/30R-VPB13N00
A4VSO355DR/30R-PPB13N00
A4VSO355EO1/30R-PZB13N00
A4VSO250EO1/30R-PZB13N00
A4VSO250EO1/30R-VZB13N00
A4VSO250DR/30R-VPB25N00
A4VSO250DR/30R-VZB13N00
A4VSO250LR2G/30R-VPB13N00
A4VSO250DFR/30R-VPB13N00
A4VSO250DFR/30R-PZB13N00
A4VSO250DFR/30R-VZB13N00
A4VSO250DRG/30R-PPB13N00
A4VSO250DRG/30R-PZB13N00
A4VSO250LR2/30R-VPB13N00
A4VSO250LR2/30R-VZB13N00
A4VSO250LR2/30R-VPB25N00
A4VSO250EO1/30R-PPB13N00
A4VSO250EO1/30R-VPB25N00
FAQ;
1. Fault Diagnosis & Root Cause Analysis (Advanced)
Q1: How to distinguish between LR2 control valve failure and piston-cylinder pair wear using only pressure and flow data?
A1: Use the “pressure-flow characteristic curve” method for differentiation without disassembly: ① Data Collection: Measure pressure (p) and flow (Q) at 5 load points (0%, 25%, 50%, 75%, 100%) using a portable hydraulic tester (Rexroth VT-HACD-1-1X); ② LR2 Control Valve Failure Pattern: The p-Q curve deviates from the hyperbolic power curve (P=p×Q=constant) — e.g., at 50% load, pressure is 10% lower than expected while flow is normal, indicating the valve cannot restrict displacement properly; ③ Piston-Cylinder Wear Pattern: The p-Q curve is hyperbolic but shifted downward — volumetric efficiency drops (e.g., 100% load flow is 85 L/min instead of 106.5 L/min), and pressure builds slowly (≥2s to reach 350 bar); ④ Verification Test: For control valve suspicion — bypass the LR2 valve and use a manual control valve; if the p-Q curve returns to normal, the LR2 valve is faulty. For piston wear suspicion — measure case drain flow (exceeds 3 L/min at 350 bar indicates internal leakage). This method identifies the root cause with 90% accuracy.
Q8: The pump’s volumetric efficiency drops to 80% after 8000 hours — how to restore it without full replacement?
A2: Targeted restoration based on wear analysis (costs 40% less than full replacement): ① Wear Assessment: Disassemble the pump and measure key components: 1) Piston-cylinder clearance (normal ≤0.02mm; replace if >0.03mm); 2) Valve plate contact area (replace if <80% contact); 3) Swashplate surface roughness (Ra ≤0.4μm; lap if Ra >0.8μm); ② Restoration Steps: 1) Replace piston-cylinder pairs (Rexroth R900909645) and valve plates (R900912345); 2) Lap the swashplate with 400-grit then 800-grit abrasive paper until Ra ≤0.4μm; 3) Replace all seals with FKM kits and apply a thin layer of assembly grease (Rexroth LT 31) to moving parts; ③ Post-Restoration Testing: Run the pump at 1500 rpm and 350 bar — measure flow (≥101 L/min indicates volumetric efficiency ≥95%); check for pressure stability (fluctuation ≤5 bar); ④ Preventive Measures: Upgrade to NAS 8 class filtration and shorten oil change intervals to 4 months to maintain restored efficiency. This process extends pump life by 4000-6000 hours.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2015
Total Annual:
2000000-5000000
Employee Number:
30~50
Ecer Certification：
Verified Supplier
Xiamen Lang Ye Hydraulic Electromechanical Equipment Co., Ltd.Lang Ye Hydraulic is the excellent supplier of hydraulic gear pump, HPU, hydraulic control valve, orbital motor and so on. We offer integrated R& D, production and sales service. We have our own self built R&D laboratory and a num... Xiamen Lang Ye Hydraulic Electromechanical Equipment Co., Ltd.Lang Ye Hydraulic is the excellent supplier of hydraulic gear pump, HPU, hydraulic control valve, orbital motor and so on. We offer integrated R& D, production and sales service. We have our own self built R&D laboratory and a num...
