JLG 600SC_660SJC Service Manual - Manual (Page 145)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
3121157 – JLG Lift – 5-53
27. Grip base plate (32) with vise, and assemble plunger
sub assembly (33).
NOTE: Insert plunger sub assembly while slowly turning it.
28. Assemble spring seat (34) and spring (35) in this
order. After assembling flange (37), tighten socket
head bolts (60) to specified torque.
29. Secure base plate (32) on workbench, and assem-
ble outer ring sub assembly (27) of roller bearing
(28), pin (27), pins (23) (4 pieces) and O-rings (43)
(2 pieces), and then assemble valve plate (26).
NOTE: Apply grease to non-sliding surface of valve plate
and to base plate. Be careful not to damage sliding
surface of valve plate.
30. Assemble base plate on reduction gear.
NOTE: Apply hydraulic fluid to sliding surface of cylinder
block. Pay attention to assembling direction of base
plate. Align pins with pin holes.
31. Tighten socket head bolts (47) to specified torque.
NOTE: Note: Tighten the bolts evenly, as base plate is
pushed by spring.
32. Assemble relief valve sub assembly (38) on base
plate (32), and tighten it to specified torque. Assem-
ble poppet (57), spring (58) and spring seat (59) in
this order, and tighten plug (41) to specified torque.