JLG G6-42A Service Manual - Manual (Page 59)

3-21 G6-42A, G9-43A, G10-43A
Boom
6. At the bottom front of the boom, verify dimension “B”
0.712-0.725 in (18,1-18,4 mm) of the washer stack
on the retract chain clevis.
7. At the back of the boom, verify dimension “C” is not
less than 2.850 in (72,4 mm) on the extend chain
clevis.
Note: Belleville washers are shown in the un-
compressed state.
8. Boom adjustment will be required if the above
dimensions are not met.
3.8.2 Chain Tension Adjustment—G6-42A
1. Remove the extend chain lock nut (1) and loosen
adjustment nut (2) until the belleville washers (3) are
free to turn on the extend rod.
2. Verify the belleville washers (3) are in the correct
order as shown. Remove the extend chain
adjustment nut (2) and correct if required.
3. Remove lock nut (4) from retract chain clevis (5).
4. Set the retract chain adjustment nut face (6) flush
with the end of the retract clevis.
5. Verify the belleville washers (7) are in the correct
order as shown. Remove the retract chain
adjustment nut (6) and correct if required.
Note: Belleville washers are shown in the
un-compressed state.
B
MAL2601
C
MAL2611
C MAL2571
3
1
2
B
MAL2551
4
5
6 7