Crawler cranes need two distinct hydraulic capabilities: precise, high-pressure control for lifting (boom, hoist, slew) and hydrostatic drive for track propulsion — moving the crane itself around a site. Sauer Danfoss's Series 90 closed-circuit piston pump, the same family used in excavator and tractor travel drives, commonly handles the track propulsion side. If your crane's issue is specifically travel — pulling to one side, weak propulsion, unresponsive speed control — rather than lifting capacity, this page covers the correct pump.
Where Sauer Danfoss Fits on Your Crane
WhatsApp your crane's make, model and symptom — we'll help confirm which pump before you order.
What Our Refurbishment Covers
Measured against Sauer Danfoss tolerance for the closed-circuit design.
Inspected and rebuilt — responsible for replenishing oil flow in the closed circuit.
Tested for smooth, accurate travel speed control.
Verified in a closed-circuit rig, confirming charge pressure and output before dispatch.
Why Crawler Crane Owners Choose PumpGrid
Correct Diagnosis First
We help confirm whether your issue is the travel pump or the main boom system before you order.
40-60% Savings vs New Import
Refurbishment saves significantly against new import pricing.
Documented Test Results
Written test report with actual charge pressure and output readings.
3-Month Warranty
Replacement, not repair, if a refurbishment defect appears within warranty.