JLG G6-42A Service Manual - Manual (Page 61)

3-23 G6-42A, G9-43A, G10-43A
Boom
7. At the back of the boom, verify dimension “C”
3.069 in (77,9 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.
3.8.4 Chain Tension Adjustment—
G9-43A/G10-43A
1. Remove extend chain lock nut (1) and loosen
adjustment nut (2) until belleville washers (3) are
free to turn on 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.
6. If dimension “A” is greater than 17.000 in
(421,8 mm), push the third section boom IN until
dimension “A” is less than 17.000 in (421,8 mm).
C
MAL2630
C
MAL2580
3
1
2
B MAL2591
4
5
6 7
A
MAL2740