Ford 81871528 Tractor Hydraulic Gear Pump Replacement

Distinguishing a service variant

If the existing machine’s service documentation lists 81871528, check the full cross-reference 81871528; 82983657; 83938860; 87540839; F0NN600BA; F0NN600BB. The serial range and original pump details still determine the final match.

The listed tractor applications include 5640, 6640, 7740, 7840, 8240, 8340. Confirm the exact tractor build and its previously fitted pump, especially when several series names share one catalogue row.

Technical specifications

Close relatives are not identical

A search may surface Ford 81836736 alongside this reference. Check the pressure annotations (not provided versus not provided), gear-end view and port layout before accepting the suggestion.

When two options remain, request front and side views of the actual units rather than treating parts-list overlap as a full approval.

Pump output versus circuit demand

For 81871528, the data is a reference-based listing rather than a rated performance table. Flow at a given engine speed and maximum circuit pressure remain open technical questions.

Until the displaced volume for 81871528 is documented, a parts quotation should refer to the exact reference 81871528, the pump drive and the application. A neighboring catalogue row cannot fill the missing capacity or pressure fields.

The table does not assign a regulated-flow value, so that quantity cannot be inferred from the displacement number.

There is no published shaft-speed band; do not assign a maximum rpm without an original specification.

Service checks worth recording

For a unit marked 81871528, compare the housing register and drive stub before connecting pressure lines. A distorted mounting face or damaged coupling should be corrected rather than forcing the new pump into place.

Document any adaptor or hose changes so future replacements are not ordered against outdated dimensions.

Hydraulic plumbing and rotation

The directional entry is CW, viewed using the catalogue’s shaft orientation. A correct replacement should use the same viewing convention rather than assuming clockwise from the engine side.

Do not machine pipework from the illustration. The two connection callouts are feed not recorded and discharge not recorded; check the physical unit first.

Information to put on the purchase enquiry

Please identify the tractor or engine installation for 81871528, together with the serial number if available. A sketch showing the unlisted feed and unlisted discharge connections will shorten the matching process.

For serial-sensitive machines, an equipment parts-list extract is especially helpful.

Technical questions from buyers

What matters beyond the 81871528 cross-reference?

Look for a matching shaft profile, mounting flange and pressure-side connection; a parts number alone cannot settle every revision.

Can the opposite clockwise pump be fitted?

No interchangeability is implied. The supplied listing is CW and the shaft-end reference direction must be confirmed.

Ordering, samples and shipping terms

Order quantities are set according to pump type and total order value. A small order of 1–2 pieces can be considered at a higher unit price; new customers may request 1–5 samples when the item is suitable. Mixed-model orders are available, normally with a combined order value of approximately USD 1,500.

Typical production schedules are 10–25 working days for standard items, 20–45 working days for customized components, and 45–120 working days for project equipment. Usual delivery terms are EXW, FOB, CIF and DAP. FCA, CFR, CPT, CIP and DDP can be discussed for specific shipments. Confirm the final schedule and terms with the quotation.