JLG 600SC_660SJC ANSI Service Manual - Manual (Page 112)

SECTION 6 - UNDERCARRIAGE
6-8 – JLG Lift – 3120794
6.2 TRACK ROLLER
Removal
NOTE: There is a track guide on each side of the machine.
The procedure which follows is for the removal of the
track roller with the guide.
PERSONAL INJURY OR DEATH CAN RESULT FROM GREASE
AND OIL COMING OUT OF THE RELIEF VALVE.
GREASE AND OIL ARE UNDER HIGH PRESSURE COMING OUT
OF THE RELIEF VALVE AND CAN PENETRATE THE BODY.
DO NOT WATCH THE RELIEF VALVE TO SEE IF GREASE IS
ESCAPING. WATCH THE TRACK OR TRACK ADJUSTMENT TO
SEE IF THE TRACK IS BEING LOOSENED.
MAKE SURE THE VENT HOLES ARE CLEAN BEFORE THE TEN-
SION IS RELEASED ON THE TRACK.
1. Put the machine on a flat level surface.
2. Release the tension on the track. Loosen the relief
valve for one turn only. If the track does not loosen
after opening the relief valve, move the machine for-
ward and backward until the tension is released.
NOTE: Adjust the height of tooling (A) so there is sufficient
clearance for the removal of the track rollers.
3. Lift the side of the machine. Install tooling (A) under
the frame as shown.
4. Loosen the four bolts that hold track guide (1) to the
undercarriage frame. Do not remove the bolts at this
time.
5. Fasten a hoist to tooling (B). Put tooling (B) in posi-
tion under track guide (1), as shown. Remove the
bolts that hold the guide. The weight of the track
guide is approximately 110 lb. (50 kg).
NOTE: The fork end of tooling (B) is slightly wider than the
diameter of the track roller. Prior to using tooling (B)
for the removal of the track roller, slide two pieces of
rubber hose over the fork end of the tool. The two
pieces of rubber will provide the fit that is necessary
for the track roller.
6. Loosen the four bolts that hold track roller (2) to the
undercarriage frame. Do not remove the bolts at this
time.
7. Fasten a hoist to tooling (B). Put tooling (B) in posi-
tion under track roller (2), as shown. Remove the
bolts that hold the track roller. Remove the track
roller. The weight of the track roller is 75 lb. (34 kg).
Table 6-3. Track Roller Required Tools - Removal
Tool Part # Description Qty.
A 8S-7640 Stand 2
8S-7611 Tube 2
8S-7615 Pin 2
B FT-1310 Track Roller Lifting Fork 1