JLG 601S ANSI Service Manual User Manual

Page 162

SECTION 5 - HYDRAULICS

5-14

– JLG Lift –

3120746

ELECTRICAL DISPLACEMENT CONTROL ORIFICES

NOTE: The pump should have two control orifices located

under the servo covers.

1. With a 7/16" wrench, remove the five bolts from the

servo cover opposite the neutral adjustment (cover
without the adjustment screw).

2. With a 7/32" internal wrench, remove and inspect the

orifice.

3. Remove the bolts from the servo cover on the neu-

tral adjustment side. Install a spacer or sprocket,
approximately 0.75 in. (19 mm) long, under the
servo cover opposite the neutral adjustment.

4. Re-install the bolts and tighten until the servo cover

on the neutral adjustment side of the pump sepa-
rates 0.125 in. (3 mm) from the housing. Turn the
cover and remove and inspect the orifice.

NOTE: The Displacement Control may first have to be

removed in order to rotate the servo cover.

5. Remove spacer, re-install orifices, gaskets, and cov-

ers. Torque grade 5 bolts 8 to 11 ft.lbs. (10.8 to 14.9
Nm) and grade 8 bolts 11 to 13 ft.lbs. (14.9 to 17.8
Nm).