JLG 600SC_660SJC Service Manual - Manual (Page 133)

SECTION 5 - CAT CHASSIS (S/N 0300128000 TO PRESENT)
3121157 – JLG Lift – 5-41
5.10 DISASSEMBLY INSTRUCTIONS
Perform disassembly in accordance with the following
procedures. Reference exploded views of assembly Fig-
ure 5-21. and Figure 5-22., if necessary.
Motor Disassembly
1. Loosen plug (41), and remove spool (39) and spring
(40).
NOTE: Pull out the spool slowly while turning it. Be careful
not to damage the circumference.
2. Loosen plug (38-6), and remove relief valve (38).
Plug (38-6) and relief housing sub assembly (38-1)
are lightly press fitted. If they come off, remove them
while turning by pinching the circumference of relief
housing sub assembly (38-1) with long nose pliers.
NOTE: Do not loosen set screw (38-15) nut (38-16). Do not
disassemble relief valve unless necessary. wrap
housing with waste cloth before pinching housing
sub assembly with long nose pliers.
3. Loosen socket head bolts (47), (50) to remove base
plate (32). If it is tight to remove, lightly tap it with a
plastic hammer in the pulling direction.
If it is still tight, remove it by lightly prying with a
screwdriver.
NOTE: Be careful that cylinder block will not pull out.
4. Remove valve plate (26) and O-ring (31), and pull
out pins (23), (27) with pliers. Remove also spring
(22).
NOTE: When pulling out pins, protect the circumference
with waste cloth to prevent damage to it.