166
SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Section 5 – Procedures Non-Routine Maintenance
10. Start the engine and operate extend/retract
function through several cycles to assure proper
operation. Repair as required.
11. To adjust boom chain tension. Refer to Section
5.4-11 for Chain Tension adjustment procedure.
Remove Retract Chain
▪
For SJ1044 TH/THS Only
1. With boom fully lowered and retracted, remove
rear access cover plate.
2. Using snap ring pliers, remove the 2 snap rings
from both sides of anchor pin on 3rd boom
section.
3. Remove chain with anchor from rear of boom and
set aside.
Pin
3rd Boom Section
Snap Ring
Chain
Anchor
Anchor Pin
& Cotter Pin
Figure 90 Rear Retract Chain Anchor
4. On front of boom assembly, remove 2 bolts from
retract anchor weldment.
1st Boom
Section
Retract
Chain
Cotter
Pin
Anchor
Bolts
Figure 91 Front Retract Chain Anchor
5. Pull retract chain from front of boom and
thoroughly inspect.
NOTE
Refer to section 5.4-8 for detailed procedure on
how to inspect boom chains.
Install Retract Chain SJ1044 TH/THS
1. Working at the rear of the boom, attach the new
retract chain to the old retract chain by installing
the link pin and a new cotter pin.
2. From the front of the boom, pull the old retract
chain from the front of the boom until the new
retract chain is exposed long enough to attach to
the chain anchor.
3. Remove the cotter pin and link pin that attached
the old chain to the new chain. Discard the cotter
pin and old chain.
4. Position the chain anchor to the retract chain and
secure by installing the link pin and a new cotter
pin.
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