Replacing Rear Oil Seals (Round shaft pumps only)
Read Safety Section before proceeding.
Pumps fitted with hydraulic drive do not have rear oil seals.
1. Access to the rear cover will be gained by removing guards, drive coupling or
pulleys.
2. Remove the oil plug and thoroughly drain the pump of oil. This may be reused if
collected in a clean tray.
3. Standard drive pumps have a deflector fitted to the drive shaft to restrict ingress of
fluids into the gearbox. Remove the deflector by loosening the socket head grub
screw which retains it to the shaft.
4. The rear cover is held in place by six screws, and a liquid gasket seals the cover to
the gearcase.
5. After removing all the screws, a sharp tap with a mallet and punch will break the
gasket seal.
6. The old oil seal can now be pressed out from the cover and replaced with a new
one.
7. A suitable liquid gasket should be applied to the rear cover and gearcase faces,
once both have been cleaned free from the old gasket.
8. Relocate the rear cover onto the gearcase and tighten screws to the required torque
settings.
9. Refit deflector over shaft, ensuring a small gap of approximately between the
deflector and the rear cover. Tighten socket head grub screw.
10. Remember to refill the pump with oil as required. Check oil level through the sight
glass.
Page 11
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