Excavators, loaders, tractors and harvesters run on Rexroth, Kawasaki and Danfoss-series hydraulic units that fail on a fixed schedule, not a convenient one — a down machine costs more per day than the part. This solution supplies drop-in aftermarket pumps, motors, control valves and seal kits that keep fleets running without OEM lead times or MOQ friction.
Each requirement below drives a specific material, design or documentation choice — miss any and the item fails inspection, or fails in service.
Mobile hydraulics fail more often from contaminated oil than worn metal — a replacement pump installed into a dirty system fails again within weeks. ISO 4406 particle-count targets (typically 18/16/13 or better for piston pumps) and inline filtration are part of the spec, not an afterthought.
ISO 4406 18/16/13Boom, swing and travel circuits see constant pressure spikes from directional changes and load shock. Axial piston pumps and motors rated 28–45 MPa with a documented fatigue life are the standard; a pump rated only for steady-state pressure will crack its cylinder block within a season of digging.
28–45 MPa · Shock-ratedA near-miss on displacement, shaft spline, or port pattern does not bolt up — or bolts up and leaks within a week. Fitment is confirmed against the OEM series code (A10VSO, K3V, A2FM) on displacement, control type, shaft and port pattern before quoting, not after shipping.
Spline · Port pattern matchDust, vibration and temperature swings from −20°C cold starts to +80°C case temperature degrade standard NBR seals faster than catalog ratings suggest. FKM or compound seal kits and IP-rated electrical connections on proportional valves are specified for harsh-site duty.
FKM seals · Wide temp rangeFeed the working condition into the selector below and the bundle in the next section is what a compliant spec resolves to.
Axial piston pumps (PF-A10VSO series) are the Rexroth-equivalent main pump on most mid-size excavators — variable displacement matches engine speed to digging load without a separate flow-control valve.
Axial piston travel motors (PF-A2FM) deliver the torque-to-size ratio needed for track drive; fixed displacement keeps the circuit simple and the part interchangeable across model years.
Swing motors (PF-A6VM) handle the upper-structure rotation load — variable displacement smooths acceleration and reduces shock on the slew ring.
Directional control valves and seal kits complete the circuit; sourcing them in the same order avoids a second supplier cycle when the motor arrives and the valve block does not match.
| Parameter | Typical range | What we select | Driver |
|---|---|---|---|
| Displacement | 4–1000 cc/rev | 28–140 cc/rev most mid-class machines | Machine class & duty |
| Rated pressure | 16–45 MPa | 28–35 MPa excavator main circuit | OEM series rating |
| Control type | Fixed / variable | Variable (load-sensing) main pump | Fuel efficiency & load matching |
| Shaft / spline | Splined, keyed, taper | Match OEM spline count exactly | Direct interchange — no adapter |
| Port pattern | SAE / metric / cartridge | SAE flange most Western OEM machines | Mounting & hose routing |
| Seal compound | NBR / FKM | FKM for high-temp & field duty | Case temperature & site environment |
The six line items below are what a typical package resolves to. Request the bundle as one RFQ — we quote, consolidate and ship under a single bill of lading, with documentation matched across all items.
| Line | Item | SKU | Key spec | Material | |
|---|---|---|---|---|---|
| 01 | Axial Piston Main Pump — variable displacement, load-sensing | PF-A10VSO-71 | 71 cc/rev, 28 MPa, SAE flange | Cast iron / steel | Details → |
| 02 | Axial Piston Travel Motor — fixed displacement track drive | PF-A2FM-45 | 45 cc/rev, 40 MPa | Cast iron / steel | Details → |
| 03 | Axial Piston Swing Motor — variable displacement upper structure | PF-A6VM-80 | 80 cc/rev, 35 MPa | Cast iron / steel | Details → |
| 04 | External Gear Pump — pilot / auxiliary circuit | PF-CB-B16 | 16 cc/rev, 2.5 MPa | Cast iron | Details → |
| 05 | Directional Control Valve — spool, solenoid actuated | PF-DSV-6 | 31.5 MPa, up to 120 L/min | Steel body | Details → |
| 06 | Hydraulic Seal & Hose Kit — FKM seal kit + matched hose set | PF-SK-FKM-A10 | rated to pump/motor pressure | FKM / steel braid | Details → |
Each item ships with the certification its destination and standard demand. See the full material selection guide for body/seat alloy detail across all categories.
| Standard | Scope | Where it applies in this bundle |
|---|---|---|
| ISO 9001 | Quality management across partner factories | Whole bundle — process capability baseline |
| Material 3.1 | Mill certificate for cast iron & steel components | Pump housings, motor casings, valve blocks |
| IATF 16949 | Automotive-grade quality system (where applicable) | Precision-machined internals on select pump lines |
| RoHS / REACH | Materials & chemical compliance | Seal compounds & coated components |
| CE | EU equipment conformity where applicable | Finished hydraulic units for EU-bound machinery |
A distributor servicing excavators and loaders needed Rexroth-equivalent pumps and motors on short restock cycles, with RU-language documentation.
Scope: PF-A10VSO main pumps, PF-A2FM travel motors and PF-A6VM swing motors for the 20–35t excavator class, cross-referenced against each customer's OEM nameplate before quoting.
Each item shipped with a Material 3.1 certificate and an RU-language spec sheet; pumps, motors, valves and a matched seal kit were consolidated into one shipment with a 2-week replenishment cycle established for ongoing restock.
RU-language support · Material 3.1 · 2-week restock cycle
The same checks our engineers run before quoting a package for this duty.
One RFQ covers every item in this solution. We select, price and consolidate the bundle, and reply within 12h in EN / RU / ES / AR.