SkyTrak 8042 Service Manual - Manual (Page 208)

3.147 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
17. Check and adjust the secondary intermediate boom
retract chain tension. (Refer to Section 3.7.3, “Boom
Chain Tension Check.”)
d. Inner Boom Retract Chain Removal and
Replacement
1. Park the vehicle on a hard, level surface.
2. Fully retract the boom and raise the boom to a
horizontal position. Place the travel select lever in
(N) NEUTRAL, move the neutral lock lever to the (N)
NEUTRAL LOCK position, engage the parking brake
switch and shut the engine OFF.
3. Remove the thumbscrew (12), lockwasher (13) and
flat washer (14) holding the rear cover (15) to the
rear of the outer boom (16). Lift the rear cover
straight up until the capscrew in the top of the cover
clears the retaining hole in the top of the outer boom.
Remove the cover from the outer boom.
4. Start the engine and extend the boom until the inner
boom retract chain adjustment nut (17) on the
bottom of the primary intermediate boom is visible.
Shut the engine OFF.
5. At the front underside of the boom, locate the
intermediate boom retract chain elastic locknut (17).
Record the amount of threads extending beyond the
elastic locknut. This measurement will be the
starting point for adjustment of the retract chain after
installation.
6. Loosen the elastic locknut (17) on the inner boom
retract chain clevis. DO NOT remove the elastic
locknut at this time, but loosen the nut as far as
possible to gain as much slack as possible in the
retract chain.
7. Return to the operator’s cab, start the engine and
slowly retract the boom all the way back, and then
extend the boom approximately 1" (25 mm) or just
until all the tension on the inner boom retract chain is
relieved. Shut the engine OFF.
Note: Record the location of the shoulder bolt to ensure
correct installation.
8. At the rear of the boom, locate the two retract chain
anchor plates (18) holding the inner boom retract
chain (19) to the inner boom, just in front of the hose
reel assembly (20). Remove the elastic locknut (21)
and shoulder bolt (22) holding the inner boom retract
chain clevis to the anchor plates. Discard the elastic
locknut and save the shoulder bolt. The two anchor
plates can remain in place on the inner boom.
MH5690
12
13
14
15 16
OH0660
17
MH2670
18
19
20
21
22