WARNING
The scissor arms are heavy and can cause an in-
jury if allowed to fall. Have another person help
you support the scissor arm during removal and
installation. NEVER put any part of your body be-
tween the parts of the scissor arm assembly.
NOTE:
Move the outer scissor arm when tighten-
ing the capscrews to make sure the bearings seat
properly.
3.
Install the bearing assembly onto the left hand
stub shaft of the inner scissor arms. Install the
left hand outer scissor arm over the bearing as-
sembly. Install the bearing cap, and align the
holes with the stubshaft holes. Apply Loctite
®
290 and install three capscrews and belleville
washers. Tighten the three capscrews to snug,
then tighten each capscrew incrementally to
maintain even pressure on the bearing until
each of the belleville washers are flattened.
When the belleville washers are flat, the cap-
screws are properly tightened.
CAUTION
DO NOT let the load rollers or shims fall off the
scissor arms.
NOTE:
Correct placement of shims is critical for
the operation of the reach mechanism. Unless the
shims are installed correctly, the reach mechanism
will not operate.
4.
Install the shim sets and load rollers on each
outer scissor arm as marked during removal
and disassembly. Install snap rings onto stub
shafts to secure. See Figure 14.
5.
Use the crane to slowly raise the scissor arms
to align the load rollers with the removal
notches in the rear frame. Use the crane to
move the scissor arm assembly so the load roll-
ers move into the channels.
6.
Slowly raise the scissor arm assembly to align
the mounts with the rod ends of the reach cylin-
ders. Install the bushings, pins, and shoulder
bolt to fasten the reach cylinders to the inner
scissor arm. See Figure 21.
1.
SNAP RING
2.
LOAD ROLLER
3.
SHIM(S)
4.
STUB SHAFT
Figure 14. Load Roller Assembly
WARNING
The scissor arms are heavy and can cause an in-
jury if allowed to fall. Have another person help
you support the scissor arm during removal and
installation. NEVER put any part of your body be-
tween the parts of the scissor arm assembly.
CAUTION
DO NOT let the load rollers or shims fall off the
scissor arms.
7.
Install the shims and load rollers on the inner
scissor arm weldment as marked during re-
moval and disassembly. If necessary, use tape
to keep the load rollers on the scissor arms. In-
stall the hoses on the hose sheaves, and install
the hose sheaves and snap rings at the mount
of the scissor arm weldment. Refer to Fig-
ure 14.
8.
Install the front frame as removed.
4500 SRM 1196
Single-Reach Scissor Arms
21
