Product Overview

The A10VO28 is a variable displacement axial piston pump from the Rexroth range, and this unit is the reference used on the FUWA 250T crawler crane. It is made in Germany, and the photographs show a grey cast housing carrying the Rexroth nameplate, a splined drive shaft at the front and the control valves mounted on top of the body.

Nominal pressure is 280 bar and maximum pressure is 350 bar. That is the envelope a 250-tonne crawler works inside when a load is held while the boom is adjusted, so the pump has to keep flow steady rather than peak and recover. As a hydraulic crane part it sits right at the centre of that job: it turns engine power into oil flow, and its condition shows up in how the machine responds — and in what the crane load indicator reports — long before anything fails outright.

The A10VO family is built across sizes 18, 28, 45, 71, 100 and 140 on the same design logic. A workshop that already handles the 45 or the 71 frame will recognise the flange, the shaft end and the control arrangement on this size 28 unit immediately, which shortens the gap between pulling a pump and fitting another one.

Specifications

Material & Build

Material and housing. The pump is listed with a 35SiMn material specification, and the photographs show a cast body with machined faces where the flange and the control block meet. 35SiMn is a silicon-manganese alloy steel, used where strength and wear resistance matter more than surface finish — the right family of material for a component living under continuous pressure cycling. The drive end is a splined shaft, and that spline carries the torque, so run a finger over it before fitting to feel for burrs or fretting.

New, not re-sealed. Every unit is supplied 100% new. These are not rebuilt or re-cased assemblies: the nameplate is the original Rexroth plate, the shaft splines are unworn and the control valves on top are the ones the pump was built with. For a fleet that has already been let down by a re-sealed pump failing inside a season, that distinction is the whole point of buying here.

What you can check on arrival. Crawler crane spare parts of this size are judged as much on what is inside the housing as on the outside, and no photograph can show that. What can be checked is the external condition: the nameplate reference, the spline, the flange face and the state of the crate. Photograph anything that looks damaged in transit before the pump goes onto the machine, while the packing is still around it.

Why the shaft end matters most. A pump that is hydraulically perfect but has a scored spline will fail again within weeks, because the play starts at the coupling and works back into the pump. Check the fit of the coupling on the new shaft before installation, and check that the old coupling has not worn to match the damaged shaft you are replacing.

Fitment On The 250T

• Main circuit duty. The pump feeds the crane's main hydraulic circuits through the control valve block. On a 250-tonne crawler it works long lift cycles rather than short bursts, so a pump that is losing flow shows it first as slow boom and winch response under load.
• What to test before condemning it. Weak hoist pull, a boom that drifts, whining that rises with load, oil running hot, metal debris in the return filter or a crane load indicator that no longer agrees with the load on the hook are the usual complaints. Pressure and flow checks at the pump outlet separate a tired hydraulic crane part from a tired valve or a leaking cylinder before anyone spends money.
• The suffix decides fit. Two pumps can share the size 28 frame and still differ in control arrangement and direction of rotation. The letters after the displacement figure are what make the difference between a direct swap and a pump that has to be re-plumbed.
• Mixed fleets. The same Rexroth family turns up on mobile crane parts lists as well as on crawler crane lists, so a yard running several brands and sizes can often standardise on one series instead of keeping a different source for every machine.
• One order, not five. Seal kits, repair kits and filters are usually replaced at the same time as a pump, and holding them in the same construction machinery spare parts warehouse means the whole repair travels together instead of arriving in three shipments.
• When the fault is electrical. A lift that feels weak can start at the pump, at the valve block, or at the crane electrical components reporting on it — a monitor, a controller, a sensor or a wiring loom. Having those lines in the same place keeps diagnosis and parts on one desk.

Hydraulic Pump References

Reading The Reference

1. Start at the plate on the failed unit, not at the invoice. The Rexroth nameplate is fixed to the housing, and the full reference plus the serial line is what identifies the pump long after the paperwork has gone missing.
2. Copy the whole suffix, including the control and rotation letters. Two A10VO28 pumps can look identical on the bench and still differ in control arrangement and direction of rotation, which is exactly where most wrong orders begin.
3. Give us the machine as well. The crane model and year alongside the pump reference are enough for us to cross-check the unit against the build of a FUWA 250T crawler crane.
4. Send a photo if the plate is worn. A clear picture of the nameplate, the shaft spline and the flange face settles most questions about whether a replacement will bolt straight on.
5. We confirm before dispatch. The reference is checked against your machine details and we come back to you before the pump leaves the warehouse, so a wrong suffix on a mobile crane parts order is caught at the desk rather than on site.

About FUWA Crane

• A long history in construction equipment. FUWA Group was set up in 1904 and is the longest-established construction equipment manufacturer in China, with a contribution to the industry that few builders can match.
• Still developing. FUWA keeps developing new products on current technology rather than resting on the older range, and improves its management step by step so service keeps pace with the machines it has already sold.
• Why that helps a parts order. A builder that has supported its cranes for over a century leaves a deep pool of references, drawings and build records behind it — the reason older crawler crane parts can still be identified rather than guessed at.
• Our place in the chain. We are an original supplier of FUWA crawler crane and crane spare parts in China, able to supply FUWA crane parts at competitive prices and with efficient service.
• Close to ten years on this line. We have worked with these parts for nearly a decade, hold a good reputation in many countries and cover a market of more than 20 countries.
• Service where the machine works. After-sales service stations in many countries, and crane engineers who can travel for on-site work, mean a pump problem does not have to be solved by sending the whole machine back to a workshop.
• Working as one of the crane parts suppliers for mixed fleets. Because FUWA, SANY, XCMG and ZOOMLION references are handled together, a fleet running several brands places one enquiry instead of four.
• The electrical side. Cables, monitors, controllers, sensors and the crane load indicator and limiter hardware sit alongside the hydraulic lines, so a fault that starts at the pump and ends at a sensor does not need a second supplier.

Ordering & Delivery

1. Send the reference and the machine model. The pump reference from the nameplate plus the crane model is enough for us to confirm the fit. Minimum order quantity is 1 piece, so a one-machine repair is a normal crane spare parts order rather than a special case.
2. We confirm stock and delivery. Most parts in stock. Usually need 7-20 days, according to the quantity. If a reference has to be brought in, we say so before the order is placed rather than after.
3. Choose your trade terms. EXW, FOB, CFR, CIF; shipped via Shanghai, Dalian, etc., or another port that suits your forwarder.
4. Payment is by T/T; Western Union or as agreed, confirmed in writing on the order.
5. Packing and handover. The pump travels in a plywood crate with the nameplate and the shaft end protected. Check the crate, the flange face and the spline on arrival, and photograph any transport damage before fitting.
6. Warranty is 2500 Working Hours or One Year, whichever comes first. Keep the dispatch documents with the machine file so any claim can be traced back to the unit.

Technical Support & Model Matching

Not sure which part fits your machine? Send the part number, the machine model, and a photo of the nameplate or the worn item, and our engineers — each with more than ten years in the construction machinery business — will confirm the correct reference and quote it. We advise on installation, help trace faults in the hydraulics or in the crane electrical components, and answer technical questions before and after dispatch. Since 2017 we have built this support on a supplier network covering FUWA, SANY, XCMG and ZOOMLION, so older and hard-to-find references can usually still be sourced.

FAQ