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SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
250 Hour or Quarterly Routine Maintenance
Section 5 – Procedures
5.4-11 Chain Tension Adjustment
The boom chains should be adjusted when the
following conditions occur:
▪
Every 250 hours
▪
When the chains are making noise (i.e. banging
on interior boom parts)
WARNING
Before performing chain adjustment, complete the
steps outlined in Section 5.3-7.
1.
Partially extend the boom.
2.
Using a 1-1/4” wrench, loosen jam nut at the
chain anchor.
Chain Anchor
Jam Nut
Figure 37
Extend Chain Jam Nut (SJ1044 TH/THS)
Chain Anchor
Jam Nut
Figure 38
Extend Chain Jam Nut (SJ1X56 TH/THS)
3.
Using a 1-1/4” wrench, tighten hex nut to achieve
the desired chain tension .
Chain Anchor
Tension Nut
Figure 39
Chain Anchor Tension Nut
4.
After reaching the satisfactory tension on the
chain, tighten jam nut back in place and torque to
80 ft.-lb.
Chain Anchor
Jam Nut
Figure 40
Chain Anchor Jam Nut
Содержание SJ1044 TH
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