SkyTrak 8042 Service Manual - Manual (Page 202)

3.141 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
16. Place the flat washer (14), saved, onto the threaded
end of the threaded clevis (15) and assemble a new
elastic locknut (16). Thread elastic locknut onto the
threaded clevis until the threads are flush with the
top of the nut.
17. Cut the loop in the wire and remove the wire from the
clevis.
18. Repeat Steps 9 thru 17 and remove and replace the
left side intermediate boom extend chain.
19. After both of the chains are replaced inside the
boom, assemble the double sheave to the mount at
the front of the primary intermediate boom.
20. 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. Line up 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.
21. Pull the anchor clevis’ (21) up around the double
chain sheave and position the clevis’ one at a time
between the yoke plates (22).
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
22. Coat the capscrews (23), saved, with anti-seize
compound. Insert the capscrews through the yoke
plates and clevis’ and secure in place with new
elastic locknuts (24). Tighten each locknut securely,
but the chain clevis’ must pivot freely.
23. At the rear of the boom, tighten the two elastic
locknuts (15) on the secondary intermediate boom
extend chain clevis’ until the amount of threads
protruding beyond each elastic locknut is the same
as the measurement recorded during removal of the
extend chains.
24. Check and adjust the intermediate boom retract
chain tension. (Refer to Section 3.7.3, “Boom Chain
Tension Check.”)
MH2570
14
15
16
MH2580
17
18
19
20
SH1810
21
22
23
24