SkyTrak 8042 Service Manual - Manual (Page 203)

Boom
3.142 Model 8042, 10042, 10054 Legacy Rev. 03/04
b. Inner 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 (1), lockwasher (2) and flat
washer (3) holding the rear cover (4) to the rear of
the outer boom (5). 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 inner boom
extend chain elastic locknut (6). Record the amount
of threads extending beyond the elastic locknut. This
measurement will be the starting point for
adjustment of the extend chain after installation.
5. Remove the elastic locknut (6) and flat washer (7)
holding the inner boom extend chain clevis (8) to the
anchor plate (9) on the boom (10). Save the flat
washer and discard the elastic locknut.
6. At the front of the boom, disconnect the inner boom
extend chain clevis (11) from the anchor plates on
the primary intermediate boom. Remove the elastic
locknut (12) holding the shoulder bolt (13) to the
anchor plates. Pull the extend chain clevis from
between the plates and lay over the front of the inner
boom (14). Save the shoulder bolt and discard the
elastic locknut.
7. Remove the elastic locknut (15) and capscrew (16)
holding the inner boom extend chain sheave (17) to
the front of the secondary intermediate boom (18).
Use a brass punch and a rawhide hammer to
remove the sheave pin (19).
8. Inspect the sheave pin (19) for corrosion or damage.
If the pin is damaged, it should be replaced. Minor
corrosion can be repaired with fine emery cloth.
Save the chain sheave (17), pin (19) and
capscrew (16). Discard the elastic locknut.
MH5690
1
2
3
4 5
MH5710
6
6
7
8
9
10
MH1790
11
12
13
14
MH1800
15
16
17
18
19