Service Manual

Hold pintle assembly in position against cover and
remove motor rotor assembly.
IMPORTANT: Each ball must be replaced in same bore
from which
it was removed. Use egg carton for ball
Inspect rotor assembly. Remove piston balls from
rotor, one at a time, working clockwise from letter
stamped in face of rotor and place in egg carton.
inspect ball pistons. They must be smooth and free
from any marks.
Inspect rotor bores, bushing and pintle for damage
or excessive clearance. Ball piston to rotor bore clear-
ance
is select fit to .0002-.0006". When damage is
found, replace complete rotor assembly. If damage is
not found, reinstall balls in their removed bores and
retain with rubber band.
storage and identification.
PINTLE REMOVAL
FIG. 46
IMPORTANT: Pump rotor piston balls must remain in
pump rotor, a repeat of previous Motor rotor assembly.
Use second rubber band to retain piston balls.
Make sure pump rotor remains in cover and tap on
cover with plastic hammer to remove pintle assembly.
Place rubber band on motor rotor assembly.
RELIEF VALVE REMOVAL/INSPECTION
Relief Valve Plug
DO NOT REMOVE
Plugs (2)
Ball
Pintle
FIG. 47
WE DO NOT RECOMMEND COMPLETE DISASSEMBLY
OF
PINTLE ASSEMBLY FOR CLEANING, FLUSHING
QUIRED, USE FOLLOWING
PINTLE DISASSEMBLY AND
Do not remove two large plugs located on pintle
journal.
Use a
1/4” Allen wrench to remove relief valve plug.
Remove spring and ball. Inspect ball seat and all parts
for damage. Replace any damaged parts.
SHOULD BE ALL THAT IS NEEDED. IF REPAIR IS RE-
INSTALLATION PROCEDURES.
Install ball, spring and plug into pintle. SCREW
PLUG
END IN JUST BELOW SURFACE OF PINTLE, DO
NOT TIGHTEN COMPLETELY.
DAMPENING PISTONS REMOVAL/INSTALLATION
FIG. 48
IMPORTANT: When removing dampening piston, do
not hit pintle journals or damage to pintle will occur.
To remove dampening pistons, use adhesive to ce-
ment a bolt or similar object to pistons and pull them
from pintle bores. Remove back-up rings and O-rings
from pistons. Replace pistons
if damaged.
Install new back-up rings nearest to smooth piston
face and O-rings in groove on pistons.
Lubricate outer surface of pistons and press pistons
into pintle bores with smooth face up. Piston smooth
face should
be flush with pintle surface.
CHECK a ACCELERATION VALVES
FIG. 49
Press coil pin and solid pin from pintle housing.
CHECK VALVE BALLS REMOVAL
Rod
3/16”Dia. Check Valve Body
Check Valve
Ball
FIG. 50
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