JLG M600 Service Manual - Manual (Page 45)

SECTION 3 - CHASSIS & TURNTABLE
3121813 – JLG Lift – 3-7
meet on the exterior of the unit, then checking for air
bubbles. If a leak is detected in a seal, o-ring or gasket,
the part must be replaced, and the unit rechecked.
Leak test at 10 psi for 20 minutes.
Tightening and Torquing Bolts
If an air impact wrench is used to tighten bolts, extreme
care should be taken to ensure that the bolts are not
tightened beyond their specified torque.
The following steps describe how to tighten and torque
bolts or socket head cap screws in a bolt circle.
1. Tighten (but do not torque) bolt "A" until snug.
2. Go to the opposite side of the bolt circle and tighten
bolt "B" until equally snug.
3. Crisscross around the bolt circle and tighten remain-
ing bolts.
4. Now use a torque wrench to apply the specified
torque to bolt "A".
5. Using the same sequence, crisscross around the
bolt circle and apply an equal torque to the remain-
ing bolts.
Main Disassembly
1. Perform Roll Check and Leak Check if applicable
prior to disassembling the unit.
2. Drain oil from unit. Note the condition and volume of
the oil.
3. Remove Coupling (7) from Spindle End first.
4. Remove Retaining Ring (6G) by prying the open end
of Retaining Ring out of the groove in the Ring Gear
(1F) with a screwdriver, then grasp the loose end
with pliers and pull the Retaining Ring completely
out of the groove.
5. Remove the Cover Subassembly (6) from the unit.
The unit can be carefully pressurized with air to pop
the cover out of the unit. Washer (2) may have to be
removed separately because of the loose attach-
ment.
6. Remove the First Stage Sun Gear (10) if applicable.
NOTE: On units with ratios greater than 36:1 numerically,
there will not be a separate First Stage Sun Gear
(10), as the gear teeth will be integral to the Input
Shaft (9).
7. Remove the Input Carrier Sub-assembly (3). Contin-
ued on next page.
8. Remove the Second Stage Sun Gear (11).
9. Remove the Input Shaft (9).
NOTE: On units with a ratio 48:1, the Sun Gear (11) and the
Input Shaft (9) will need to be removed together.
10. Remove the Output Stage Carrier Sub-assembly (4)
11. Loosen and remove the three Flat Head Bolts (19)
that retain the Ring Gear (1F) to the Housing (1G).
12. Lift the Ring Gear (1F) off of the Housing (1G).
13. Remove the O-ring (18) from between the Housing
(1G) and the Ring Gear (1F).