SkyTrak 8042 Service Manual - Manual (Page 193)

Boom
3.132 Model 8042, 10042, 10054 Legacy Rev. 03/04
18. Lubricate the chain, while it is exposed, if it does not
need to be replaced. (Refer to Section 3.7.2, “Chain
Lubrication.”)
19. Pull the inner boom extend chain (1) up and around
the sheave (2) at the front of the secondary
intermediate boom.
Note: ALWAYS replace elastic locknuts with new elastic
locknuts to help ensure proper fastening.
20. Place the extend chain clevis (3) between the
mounting plates at the front of the secondary
intermediate boom. Coat the saved shoulder bolt (4)
with anti-seize compound and insert through the
plates and clevis. Secure the shoulder bolt in place
with a new elastic locknut (5). Tighten securely, but
the chain clevis should pivot freely.
Note: Have a second person help with the installation of
the retract chain between the primary and secondary
intermediate boom assemblies.
21. One person should start the engine, and slowly
extend the boom until the rectangular slot (6) on the
under side of the primary intermediate boom (7) is
exposed. A second person should be at the rear of
the boom making sure that the inner boom retract
chain does not catch on anything while the boom is
being extended. Turn the engine OFF.
If a threaded eye or capscrew with flat washer was
installed to the end of the clevis:
22. Coat the threads of the threaded clevis (8) with
multi-purpose grease.
23. From the rear of the boom, one person should push
the threaded clevis end (8) of the retract chain (9)
under the chain sheave and down between the
primary intermediate boom and the secondary
intermediate boom. The person at the front of the
boom should pull the clevis using the 17 gauge
wire (10) attached to the clevis in step 7. Push and
pull the threaded clevis down to the tab (11) at the
front underside of the primary intermediate boom.
24. The person at the front of the boom should guide the
threaded end of the clevis (8) through the hole in the
tab (11) on the primary intermediate boom.
25. Remove the wire, and the threaded eye or capscrew
with flat washer, from the end of the clevis.
If no threaded eye or capscrew with flat washer was
installed to the end of the clevis:
26. The tow wire and clevis guide wire will be hanging
out the rear of the boom along with the chain.
27. Loop the end of the tow wire (12) through the right
side of the threaded clevis (13) as seen from the
assembled position. This will allow the tow wire to
guide the threaded clevis down the left side of the
primary intermediate boom and close to the hole in
the mounting tab. Leave a long enough loop so that
after the clevis is re-assembled into the tab on the
primary intermediate boom, one side of the loop can
be cut and the remainder of the wire can be pulled
out of the boom.
MH2520
1
2
3
4
5
MH6030
6
~
7
MH5990
8 9
10
11