JLG 600SC_660SJC Service Manual - Manual (Page 146)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
5-54 – JLG Lift – 3121157
33. Insert spool (39) and spring (40) into base plate, and
assemble plugs (41), (43) mounted with O-rings
(42), (43), and then tighten them to specified torque.
Assemble poppet (57), spring (58) and spring seat
(59) in this order, and tighten plug (41) to specified
torque.
34. Assemble bonded seal (51) and socket head bolt
(50) in this order. Lubricate one location of socket
head bolt (50) with specified amount (2600 cc) of
tightening lubricant , and then tighten remaining
plug (45) and socket head bolt (50).
NOTE: Apply seal tape to plug (45).
The reassembly process is now complete.
5.13 QUALITY CHECK AFTER REASSEMBLY
1. Air Leak Test of Reduction Gear Assembly
Remove one plug (1-8) of the reduction gear assem-
bly and apply compressed air (0.03 MPa) through
tapped hole of plug in water for two minutes, and
observe that there are no bubbles.
2. Air Leak Test of Motor
Seal all piping ports on the motor except one port
with plugs, and apply compressed air (0.3 MPa)
through open port in water. Observe that there are
no bubbles.
3. Upon completion of leak tests in subparagraphs (1)
and (2) above, fill the motor case with fresh hydrau-
lic fluid. Run the motor crosswise for two minutes fill-
ing hydraulic fluid at flow rate of 20 liters per minute.
Verify that there is no excessive heat, vibration or
noise during running.