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§Equipment
Combines and harvesting equipment
Engine machining for combines and harvesters, booked around the harvest window.
The work
Combines and harvesting equipment
A combine engine has a narrow window in which it must work and a long one in which it can be rebuilt. Bringing the work forward into the off-season is the difference between a planned rebuild and an emergency one.
Heads, blocks, crankshafts and rods all come through the same three-stage process, with inspection ahead of any machining so the quote reflects the engine's real condition.
Manufacturer names are used to describe the engines PDM machines and rebuilds. PDM is an independent machine shop and is not affiliated with, endorsed by, or an authorised dealer for any manufacturer named on this page.
→Services
Machined here.
01Complete cylinder head rebuildingValve jobs with 3-angle seats, precision-ground valves, clean-room assembly.View process →02Engine block rebuildingBore, deck and hone indexed to a true deck-to-cylinder-to-main relationship.View process →03Engine assemblyAssembled by a specialist in a dedicated clean room, isolated from the shop floor.View process →04Complete engine rebuildsTeardown to assembly, with premium first-line parts and gaskets.View process →05Boring & honingCorrect cylinder wall finish and crosshatch for ring break-in and oil film.View process →06Crankshaft grinding & polishingJournals held to ±0.0001″ runout and taper — often no detectable deviation.View process →