Product Overview

We are a crane parts supplier first and a hydraulic parts source second, and this drive shaft is where the two meet. KPM variable piston pumps in the K5V200 family are still working in cranes, drilling rigs and excavators long after the machines around them have been replaced, and a worn shaft is usually what ends the pump's service life.

Inside an axial piston pump the shaft takes rotation from the coupling and carries it into the rotating group. Both ends of this one are splined, so torque reaches the cylinder block without a key or a separate hub, and the body is machined rather than cast. When a spline strips, a bearing collapses or the pump seizes, the shaft is the first part to examine — worn splines will not carry full torque or hold timing even when everything else in the pump is new.

This is a replacement part supplied on its own, not a complete pump. It arrives new, and it is bought most often as one line on a rebuild list rather than as a spare kept on a shelf. The buyers who come back for it are hydraulic workshops rebuilding pumps off cranes and rigs, fleet maintenance teams holding one part against a breakdown, and dealers who carry construction machinery spare parts for contractors in their own market.

Specifications

Shaft Identification & Fitment

1. Read the pump nameplate first. It carries the family and the build suffix that follows it — on these pumps usually DT, DTP or DTH — and the suffix changes the internals even when the family name looks the same.
2. Find the number on the shaft you are removing. If it has worn smooth or been skimmed, do not work from memory; the number is what ties the shaft to the pump build.
3. Measure as a backup. Note the shaft body, the spline form at each end and the position of the shoulders, and photograph the old shaft beside a ruler so the proportions are clear.
4. Note the machine as well. Crane parts are often moved between machines of the same family during a rebuild, and the machine tells us where a pump may originally have come from.
5. Tell us the history if you know it. Heavy equipment parts work is full of pumps that have already been rebuilt once, sometimes with internals from a different build, and the plate on its own no longer tells the whole story.
6. Send the plate photo, the old shaft number and your measurements in one message. We compare them against the pump build, confirm the match, and say so if something does not line up.

Pump Parts & Series Coverage

This shaft is one line in a much larger construction machinery spare parts range. Alongside it we supply the other internals a piston pump consumes during a rebuild: valve plates, plungers, plunger plates and drive shafts for hydraulic piston pumps, together with cylinder blocks, retainer plates and seal kits. Complete hydraulic pumps, hydraulic motors and hydraulic valves, including proportional valves, come from the same range.

Valve plates, plungers and plunger plates for Rexroth hydraulic variable piston pumps are the core of that list, and the same parts are supplied for KPM and Kawasaki-type units. Pump models covered run from Rexroth axial piston pumps — A10VSO, A4VSO, A7V0, A11VO, A4VG, A6VE, A2FE, A6VM, A2FM, A2FO, A6V, A7V, A8V and similar — through Kawasaki K3V63/112/140/180DT/DTP and K5V80/140/200DT/DTH, plus pumps built by Bosch Rexroth, Kawasaki, Linde and Parker.

Crawler crane parts sit in the same catalogue: track shoes, upper and lower rollers, sprockets and idler wheels, the undercarriage items that come across the same workshop bench as a hydraulic pump. When a machine needs both, the pump side and the undercarriage side can be checked together.

Applications

• Crawler and mobile cranes. Pumps in this family drive hoist, boom and travel functions, so a failed shaft stops the machine where it stands. It is one of the crane spare parts fleet workshops ask for most often once a pump comes off for inspection.
• Rotary drilling rigs. The same pump family turns the rotary drive and winch circuits on rigs, which is why a shaft bought for a crane is often kept for a rig working in the same fleet.
• Construction machinery. Excavators, loaders and similar units working beside crawler crane parts on site run the same type of axial piston pump in their main hydraulic circuits, and their pumps are rebuilt on the same benches.
• Agriculture machinery. Tractor and implement hydraulics use piston pumps of this type, usually smaller, where a rebuild still makes sense against the cost of a complete unit.
• Automotive and workshop hydraulics. Service vehicles, mobile hydraulic systems and workshop presses are another home for these pumps; this is not a drivetrain part for a car.
• Ports, mines and heavy industry. Machines on continuous duty are the ones that fail first, and these sites tend to keep a pump and a shaft ready rather than waiting for a lift.

Installation & Commissioning

1. Work clean and dry. Heavy equipment parts work rewards a covered bench, capped ports and bagged fasteners — and crane parts are no different: grit inside a piston pump ends the rebuild before the machine moves again.
2. Before stripping, note and mark the orientation of the control housing so the pump goes back together the way it came apart.
3. Lay the internals out in the order they come off, so the cylinder block, valve plate, retainer plate and pistons return to the same positions.
4. Inspect everything that ran against the shaft: the coupling splines, the cylinder block splines and the bearings. A worn coupling will wear a new shaft at the same rate.
5. Fit the new shaft by hand. It should slide into the splines without force — never drive it in with a hammer and never pull it home with a bolt.
6. Renew seals, O-rings and gaskets while the pump is open, and check the valve plate face for scoring.
7. Fill with clean hydraulic oil and vent the pump before start-up. Air in a piston pump damages the rotating group within minutes.
8. Start at low load and listen. Watch temperature and noise through the first working hours, then recheck for leaks before the machine returns to full duty.

Ordering & Delivery

Discontinued & Hard-to-Find Parts

When a machine is out of production but still working, the part number matters more than ever. If the number you have is discontinued or hard to trace, send us the machine model together with that number: we search our supplier network, confirm what is genuinely available, and give you a straight answer before you commit. Where the original is no longer made, we set out the alternatives we can actually supply, or an upgrade path, and coordinate samples, inspection and made-to-order work with the suppliers we buy from. Sourcing, consolidation and export handling stay with us.

FAQ