Rexroth's A4VG is a closed-circuit axial piston pump rated up to 400 bar, purpose-built as the power element of hydrostatic transmission — exactly what a bulldozer's track drive needs for smooth, precise directional control. The A11VO handles the separate open-circuit job of powering the blade and any ripper attachment. Because they serve different circuits, a fault in one rarely means the other needs attention too — which is why correct diagnosis before ordering matters.
Which Rexroth Pump Does Your Bulldozer Need?
WhatsApp us a short video of the symptom and we'll help confirm which pump before you order.
What Our Refurbishment Covers
A4VG Travel Pump
Full disassembly. Piston and slipper wear measured against Rexroth tolerance up to 400 bar peak rating. Integral charge pump inspected. Swashplate control (mechanical, hydraulic or electro-hydraulic depending on variant) tested for smooth response.
A11VO Blade Pump
Radial/axial piston assembly measured. Valve plate flatness checked. Displacement control tested to confirm accurate blade response across the full range, from fine grading to full-power dozing.
Bench Testing
Each unit is bench tested to its correct circuit type — closed-loop for A4VG, open-loop for A11VO — with pressure and flow recorded on a written test report before dispatch.
Why Contractors Choose Refurbished Rexroth Pumps
Faster Than a Bulldozer-Specific Import
Bulldozer-class A4VG and A11VO units are less commonly stocked in India than excavator-class equivalents. PumpGrid keeps refurbished units ready to dispatch in 2-3 working days.
₹80,000-₹1.5 Lakh Saved Per Unit
Bulldozer hydraulic components carry a premium given their size and pressure rating — a refurbished unit typically saves 40-60% against new OEM import pricing.
Documentation for Mining & Infrastructure Contracts
Bulldozers are frequently deployed on mining and large infrastructure sites with strict maintenance-record requirements. Our written test report meets that need.
Warranty Confirmed at Quote Stage
3-month minimum warranty on every unit, with replacement rather than repair for any refurbishment defect.
Is Your Bulldozer's Rexroth Pump Showing These Signs?
If travel and blade functions are affected differently, tell us which — it helps confirm which pump needs replacing before you order.