OWNER’S MANUAL 8/31/21 Page 10 of 18
DIG CHAIN INSTALLATION / REPLACEMENT
DANGER
: Before beginning any work on the dig chain engine start-up must be prevented. See the
MAINTENANCE PREPARATION section page 6.
WARNING
: Never place any part of your body underneath the boom, the boom can creep down or
lower. The boom can be rested on a stand to prevent creep during maintenance.
Inspect the dig chain for proper chain tension and broken or worn teeth.
Chain tension:
Position the boom so that it is horizontal, parallel with the ground. At the booms mid-section there should
be a 2” (5cm) gap between the chain and the bottom of the boom.
If the chain is not properly tensioned, turn the square head bolt in the middle of the boom clockwise to
increase the tension or counterclockwise to reduce the chain tension.
•
Chains with bolt on teeth: Worn or damaged teeth can be replaced, as a set or individually.
•
Chains with weld on teeth: The teeth and chain must be replaced as a unit.
To remove the dig chain:
1.
Lower the boom until it is approximately parallel to the ground but not touching the ground.
2.
Turn engine off: Follow
Prevent engine start-up
procedure.
3.
Locate and remove the cotter pin and chain pin.
4.
Unwrap the chain from the sprocket and boom roller to remove.
To install the dig chain:
1.
Lower the boom until it is approximately parallel to the ground but not touching the ground.
2.
Turn engine off: Follow
Prevent engine start-up
procedure.
3.
Loosen the square head bolt in the middle of the chain boom and slide the boom all the way back.
4.
Place an end of the chain on top of the boom such that the teeth are up and facing forward.
5.
Manipulate the chain over the sprocket until both ends of the chain meet on top of the boom.
6.
Install the chain pin to join both ends of the chain, install a cotter pin through the chain pin and bend
both ends of the cotter pin around the chain pin. Never reuse a cotter pin on the dig chain.
7.
Check and properly adjust the chain tension. See above, in this section.
SEE DIAGRAM
INSTALLED DIG CHAIN
ON PAGE 12
