JLG 340AJ Service Manual - Manual (Page 51)

SECTION 3 - CHASSIS & TURNTABLE
3121259 – JLG Lift – 3-11
Measuring Rolling Torque
1. Screw one bolt down into the housing and rotate the
housing so that the bolt is at twelve o’clock.
2. Position the torque wrench so that it is perpendicular to
the vertical centerline as shown.
3. The correct reading can only be made if the torque
wrench is pulled slowly (approximately 3.5 rpm) and
smoothly towards you.
Main Disassembly
1. Perform Roll Check, Leak Check and Brake Check if appli-
cable prior to disassembling the unit.
2. Drain oil from unit. Note the condition and volume of
the oil.
3. Remove Retaining Ring (6G) by prying the open end of
retaining ring out of the groove in the Ring Gear (1E)
with a screwdriver, then grasp the loose end with pliers
and pull the retaining ring completely out of the groove.
4. Remove the Cover Subassembly (6) from the unit. The
unit can be carefully pressurized with air to pop the
cover subassembly out of the unit.
5. Remove O-Ring (17) from groove in Cover Subassembly
(6).
6. Remove the Sun Gear (11).
7. Loosen and remove the three Flat Head Bolts (19) that
retain the Ring Gear (1E) to the Housing (1D).
8. Lift the Ring Gear (1E) off of the Housing (1D).
9. Remove the O-Ring (18) from between the Housing (1D)
and the Ring Gear (1E).
10. Using a 1/8" diameter punch, drive the Roll Pin (4G) into
the Planet Shaft (4E) until it bottoms against the Spindle
(1 A).
11. Grasp the Roll Pin (4G) using needle nosed pliers or
some sort of hooked tool, and pull the Planet Shaft (4E)
out of the Spindle (1A).
12. Using a 1/8" diameter punch, drive the Roll Pin (4G) out
of the Planet Shaft (4E).
NOTE: The roll pins should not be reused when reassembling the
unit.
13. Slide the Planet Gear Subassembly (4F) out of the Spin-
dle (1A) being careful to not drop the Needle Bearings
(4C) in the process.
14. Remove the Thrust Washers (4B), all the Needle Rollers
(4C) and the Thrust Spacer (4D) from the Planet Gear
(4F).