JLG sky trak mmv Service Manual page 81

4
4. Start the engine, retract the boom completely and
turn the engine OFF.
5. Open the door at the rear of the vehicle.
6. Check the measurement (6) from the rear of the
intermediate boom to the rear of the inner boom.
This measurement should be in the range of 8.5-9.0"
(216-229 mm).
If the intermediate boom to the inner boom
measurement is less than 8.5" (216 mm), the boom
may require extensive adjustment and/or repair.
Contact the JLG Service Department or the nearest
JLG Authorized Service Center (ASC).
If the intermediate boom to the inner boom
measurement is greater than 9.0" (229 mm), tighten
the retract chain locknut (7) located on the bottom
front of the outer boom (8).
Model MMV Rev. 12/04
General Information, Specifications and Maintenance
5
OA0491
8
7. Start the vehicle and cycle the boom in and out
several times. Then with the boom horizontal, retract
the boom completely. Turn the engine OFF.
8. Recheck the measurement (6) at the rear of the
boom between the intermediate and inner boom. If
the measurement is still more than 9.0" (229 mm),
repeat Steps 2-6.
Note: If by adjusting the retract chain locknut ( 7 ) you
cannot obtain the measurement within the range of
8.5-9.0" (216-229 mm), the boom (8) may require
extensive adjustment and/or repair. Contact the JLG
Service Department or the nearest JLG Authorized
Service Center (ASC).
If the measurement is within the range of 8.5-9.0" (216-
229 mm), measure the top boom extend chain sag again.
6
OT07602
7
OT04902
2.65