JLG 600SC_660SJC Service Manual - Manual (Page 280)

SECTION 8 - HYDRAULICS
8-20 – JLG Lift – 3121157
8.8 HYDRAULIC PUMP (GEAR)
Disassembly
NOTE: The following general instructions also apply to mul-
tiple section gear pumps, the only extra parts are the
coupling between the drive shafts and the center dis-
tance plate which divides the two pump sections.
This repair procedure also applies to the "W" series
Gear Motors.
1. It is very important to work in a clean work area
when repairing hydraulic products. Plug ports and
wash exterior of pump with a proper cleaning sol-
vent before continuing.
2. Remove port plugs and drain oil from pump.
3. Use a permanent marker pen to mark a line across
the mounting flange, gear housing and end cover.
This will assure proper reassembly and rotation of
pump.
4. Remove key from drive shaft if applicable.
5. Clamp the mounting flange in a protected jaw vise
with the pump shaft facing down.
6. Loosen the four metric hex head bolts.
7. Remove pump from vise and place on clean work
bench, remove the four hex head bolts and spacers
if applicable.
8. Lift and remove end cover.
9. Carefully remove gear housing and place on work
bench. Make sure the rear bearing block remains on
the drive and idler shafts.