JLG 150HAX ANSI Service Manual - Manual (Page 125)

SECTION 5 - HYDRAULICS
3120679 – JLG Lift – 5-29
20. Check the plug or plugs in the port end cover to be
sure they are tight. Follow the procedure outlined in
step 4 for new plugs.
21. Place the port end cover over the gear journals.
Align the dowels with the holes in the mating cast-
ing. Being careful not to pinch the gasket seal, tap
the port end cover lightly in the center between
bearing bores to engage the dowels and to move
parts together in the final seating.
22. Thread the studs, washers, and nuts into the shaft
end cover and tighten alternately or cross-corner.
Rotate the drive shaft with a wrench to make sure
there is no binding in the pump. After the fasteners
are tight and there is no internal binding, torque the
fasteners in a diagonally opposed pattern to 200
ft.lbs. (280 Nm) or for P315 models to 140 ft. lbs.
(196 Nm).
Wear Guide for Replacement
GEAR HOUSINGS
Wear in excess of 0.007 in. (0.18 mm) cut out necessitates
replacement of the gear housing Place a straight-edge
across the bore. If a 0.007 feeler gauge can be slipped
under the straight-edge in the cut out area, replace the
gear housing.
Pressure pushes the gears against the housing on the low
pressure side. As the hubs and bushings wear, the cut-out
becomes pronounced. Excessive cut out in a short period
of time indicates excessive pressure or oil contamination.
If the relief valve settings are within prescribed limits,
check for shock pressures or tampering. Withdraw oil
sample and check it, and tank, for dirt.
GEARS
Any scoring on gear hubs necessitates replacement.
Scoring, grooving, or burring of outside diameter of teeth
requires replacement. Nicking, grooving, or fretting of
teeth surfaces also necessitates replacement.