b.
Remove the screw securing the pin retainer
to the scissor arm and slide the pin retainer
from behind the sensor.
c.
A setscrew in the pivot pin (behind the sen-
sor) secures the sensor shaft to the pivot pin.
Loosen the setscrew and slide the position
sensor from the pivot pin.
8.
Remove the pivot pins from the inner scissor
arms using a hammer and a brass drift. Re-
move the inner scissor arms from the rear
frame. Remove the bushings from the inner
arms if replacement is necessary.
CLEAN AND INSPECT
WARNING
Cleaning solvents can be flammable and toxic and
can cause skin irritation. Always wear the proper
protective equipment including eye protection
and petroleum resistant gloves when handling. Al-
ways follow the recommendations of the manu-
facturer.
CAUTION
DO NOT use steam to clean sealed bearings. DO
NOT use compressed air or immerse in solvent to
clean sealed bearings. Sealed bearings are self-
contained and permanently lubricated. Wipe bear-
ings off with a clean cloth and turn to check for
proper operation. Replace if movement is restric-
ted or if bearing does not turn smoothly.
Clean all of the parts of the scissor arm assembly
with solvent. Inspect the parts of the scissor arm
assembly for damage and wear. Replace all bush-
ings and load rollers.
ASSEMBLE AND INSTALL
Always use new bushings and load rollers. Install a
thin coat of multipurpose grease on all new bush-
ings, all thrust washers, all shims, all stub shafts,
and all pins of the scissor arm assembly. For the
following procedures, refer to Figure 11.
WARNING
Use safety chains on the rear frame and mast
weldments to keep the rear frame and mast weld-
ments from moving. Install the safety chains as
described in Safety Procedures When Working
Near Mast in this section.
The points between the scissor arms and the rear
frame are pinch points and can cause an injury.
DO NOT put your hands near pinch points when
removing the pivot pins. Use a hammer and brass
drift to remove the pivot pins.
1.
Install the bushings to inner scissor arm if re-
moved. Using an overhead lifting device
(crane), raise inner scissor arm to align the
mounts with the mounts of the rear frame. In-
stall both pivot pins, the LH pin retainer, and
screw to secure.
2.
Install position sensor to right pivot pin as re-
moved:
a.
Check that the pin retainer hole aligns with
mounting hole in scissor arm. Adjust to align
if necessary. DO NOT install the pin retainer
at this time. See Figure 13.
b.
Remove the setscrew from the pivot pin and
clean old thread-lock residue from the
threads. Apply Loctite
®
242 to the threads
and start screw into the pivot pin.
c.
Position the sensor assembly to the pivot pin
so that the sensor shaft enters the pin with
the flat side of the shaft facing the setscrew.
Tighten the setscrew.
d.
Install the pin retainer onto the pivot pin
and secure in place with screw as removed.
e.
Align the sensor and mounting bracket hole
and install capscrew and spacer.
f.
Install wiring connector and secure harness
to bracket with new wire tie as removed.
Single-Reach Scissor Arms
4500 SRM 1196
20
Содержание N30ZDR
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