DOZER PUMP ASSEMBLY
Park machine on level ground, set parking
brake, lower blade and place dozer control lever In
Remove seat mounting base and seat for
easier access to dozer pump.
Remove rear floorplate and bulkhead cover.
Clean all dirt from around hydraulic tank
filter head. Remove capscrews and lift off filter head to
vent suction line.
Note: Check valves are located In hydraulic tank return
lines to prevent tank from draining. Filter head must be
vented to prevent hydraulic oil from siphoning out.
Relief Valve Adjustment
Fill hydraulic pump with clean hydraulic oil
connect inlet hose to pump. Warning: Back off main
relief valve until spring tension on the adjusting screw Is
If Installing a new unit, to avoid seizure,
never feed hot hydraulic oil Into a cold pump.
Refill hydraulic tank to proper level with
Venting Suction Line
To facilitate the repair of these units, before any work is
done, we suggest that you first read all of the steps used
in disassembly and assembly of the pump. Whenever
disassembly of a hydraulic unit Is required, replace all
Remove and cap Inlet and outlet hoses on
Dirt is the enemy of any hydraulic system. The
Remove pump mounting bolts and remove
first requirement of good maintenance of hydraulic
pump from machine.
equipment is cleanliness. Make sure you disassemble
and assemble your hydraulic equipment in a clean area.
It is important to airblast all parts and wipe them
When installing hydraulic pump, splines on
with a clean lintless cloth before assembly. Use caution
drive gear sleeve should be checked to ensure good
In gripping all parts in the vise to avoid damaging
condition. If splines are not satisfactory, replace sleeve.
Clean pump mounting surface and install
A pump must be driven in the direction of rotation
new gasket on pump mounting face.
for which it was built; otherwise, pressure will blow the.
Install pump and mounting bolts (refer to
shaft seal. It is a good idea to check all replacement
parts closely before installing to ensure that no damage
Connect outlet hose on pump only.
occurred during shipment.