SkyTrak 8042 Service Manual - Manual (Page 200)

3.139 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
3.7.6 Boom Extend and Retract Chains
Removal and Replacement
a. Intermediate Boom Extend Chains 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 (N)
NEUTRAL LOCK position, engage the parking brake
switch and shut the engine OFF.
3. Remove the thumbscrew (10), lockwasher (11) and
flat washer (12) holding the rear cover (13) to the
rear of the outer boom (14). 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. At the rear of the boom, locate the intermediate
boom extend chain elastic locknuts (15). Record the
amount of threads extending beyond the elastic
locknuts. This measurement will be the starting point
for adjustment of the extend chains after installation.
5. Remove and replace the intermediate boom extend
chains one at a time. Remove the right side elastic
locknut (15) and flat washer (16) holding the right
side intermediate boom extend chain clevis (17) to
the anchor plate (18) on the secondary intermediate
boom (19). Save the flat washer and discard the
elastic locknut.
6. At the front of the outer boom, remove the
capscrews (20) and elastic locknuts (21) holding the
intermediate boom extend chain clevis’ (22) to the
yoke plates (23). Discard the elastic locknuts.
7. Inspect the capscrews (20) for signs of wear or
damage. Replace with new capscrews if damaged or
worn.
8. At the front of the primary intermediate boom,
remove the capscrew (24) and lockwasher (25)
holding the extend chain sheave pin (26) to the
sheave mount bracket on the primary intermediate
boom. Remove the pin from the mount bracket and
the extend chain sheave (27). Remove the extend
chain sheave from the mount.
MH5690
10
11
12
13 14
MH2570
15
15
16
17
18
19
SH1810
20
21
22
23
MH2580
24
25
26
27