SkyTrak 8042 Service Manual - Manual (Page 128)

3.67 Model 8042, 10042, 10054 Legacy Rev. 03/04
Boom
13. At the rear of the boom, locate the inner boom
extend chain locknut (21). Measure the amount of
threads protruding beyond the elastic locknut and
record that measurement for reassembly.
14. Using a 1-7/16" socket and a 12" extension, loosen
the elastic locknut (21) until the nut is held on by a
couple of threads. DO NOT remove the elastic
locknut at this time.
15. At the rear of the boom, locate the two secondary
intermediate boom extend chain locknuts (22).
Measure the amount of threads protruding beyond
each elastic locknut and record these
measurements for reassembly.
16. Using a 1-1/16" socket and a 12" extension, loosen
both elastic locknuts (22) until each nut is held on by
at least two full threads. DO NOT remove these
elastic locknuts at this time.
17. Return to the operator’s cab, start the engine and
extend the boom approximately 2" (51 mm). Retract
the boom slightly until there is slack in the inner
boom extend chain. Shut the engine OFF, and exit
the cab using the hand holds.
18. At the front of the boom, disconnect the inner boom
extend chain clevis (23) from the anchor plates on
the primary intermediate boom. Remove the elastic
locknut (24) holding the shoulder bolt (25) to the
anchor plates. Pull the extend chain clevis from
between the plates and lay over the front of the inner
boom (26). Save the shoulder bolt and discard the
elastic locknut.
MH1690
13
14
15
16
17
18
19
20
MH1780
21
22
MH1790
23
24
25
26