SkyTrak 8042 Service Manual - Manual (Page 166)

3.105 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
5. At the rear of the secondary intermediate boom,
assemble the retract chain sheave (13) to the
mounting ears on the left side of the boom. Place the
sheave between the ears and insert the sheave
pin (14) from the right side. Line up the hole in the
pin retainer plate with the threaded hole in the right
ear. Secure the pin in place with the capscrew (15),
saved, and the lockwasher (16), saved. Tighten the
capscrew securely.
6. Grease the sheave using the grease fitting in the pin.
Spin the sheave by hand to ensure the sheave spins
freely on the pin and to distribute grease evenly.
7. Install the lower front wear pads:
a. Place the wear pad inserts (17), saved, into the
cavities of the lower front secondary intermediate
boom wear pads (18), saved.
b. Place the wear pads (18), saved, into the
secondary intermediate boom with the offset of
the wear pads toward the outside.
c. Apply Loctite
®
242 threadlocker to the threads of
the capscrews (19), saved. Line up the holes and
secure in place with the capscrews (19),
lockwashers (20), saved, and flat washers (21),
saved. Be careful not to push the wear pad
inserts out of the wear pads.
d. Torque all wear pad mounting capscrews to
31 ±3 lb-ft (42 ±4 Nm).
e. Fill all wear pad cavities with a good grade of
lithium-based EP grease.
8. Lay the two extend chains (22) on the top of the
secondary intermediate boom with the threaded
clevis ends (23) toward the rear of the boom.
9. Coat the threads on each clevis (23) with multi-
purpose grease and insert the clevis’ through the
holes in the anchor plate.
10. Install a flat washer (24), saved, and a new elastic
locknut (25) onto each clevis. Tighten the elastic
locknut far enough so the threads are even with the
top of the locknut.
11. On the inside of the secondary intermediate boom,
spray the wear pad pathways with LPS3 or
equivalent. Spray the wear pad pathways on the
underside of the secondary intermediate boom with
LPS3 or equivalent.
12. Lift the secondary intermediate boom up. Carefully
slide the secondary intermediate boom into the front
of the primary intermediate boom. Push the boom all
the way in.
MH2020
13
14
15 16
MH2070
17
18
19
20
21
22
MH2300
23
22
23
24
25