SkyTrak 8042 Service Manual - Manual (Page 168)

3.107 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
18. Place the double extend chain sheave (17), saved,
between the mounts and under the extend chains at
the front of the primary intermediate boom. Insert
the sheave pin (18), saved, through the mounts and
the double sheave. Align the mounting hole in the
sheave pin with the threaded hole in the sheave
mount, and secure in place with the capscrew (19),
saved, and the lockwasher (20), saved. Tighten
securely.
19. After the sheave is assembled, apply a good grade
of multi-purpose grease to the grease fitting at the
end of the pin (21). Turn the sheave by hand to
distribute the grease evenly.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
20. Align the holes in the yoke plates (22) with the hole
in the mount on the outer boom. Coat the new
shoulder bolt (23), with anti-seize compound, and
insert the shoulder bolt through the yoke plates and
the mount on the boom. Secure in place with a new
elastic locknut (24). Tighten the locknut securely, but
the yoke plates must pivot freely.
21. Place the retract chain (25) around the retract chain
sheave on the right side of the boom. Stretch the
chain forward and place the clevis between the two
anchor plates (26). Align the hole in the clevis with
the hole location recorded in the removal procedure.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
22. Insert the shoulder bolt (27), saved, from the top
down and secure in place with a new elastic
locknut (28). Tighten the locknut securely.
MH2350
14
12
12
13
14
15
16
MH2360
17
18
19
20
21
MH1990
22
23
24
MH2340
26
25
26
27
28