JLG 660SJ Operator Manual - Manual (Page 140)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
6-36 – JLG Lift – 3121205
4. Wheel nuts should be torqued after first 50 hours of
operation and after each wheel removal. Check torque
every 3 months or 150 hours of operation.
6.5 OSCILLATING AXLE LOCKOUT TEST (IF
EQUIPPED)
LOCKOUT SYSTEM TEST MUST BE PERFORMED QUARTERLY, ANY TIME
A SYSTEM COMPONENT IS REPLACED, OR WHEN IMPROPER SYSTEM
OPERATION IS SUSPECTED.
NOTE: Ensure boom is fully retracted, lowered, and centered
between drive wheels prior to beginning lockout cylinder
test.
1. Place a 6 inches (15.2 cm) high block with ascension
ramp in front of left front wheel.
2. From platform control station, start engine
3. Place the Drive control lever to the forward position and
carefully drive machine up ascension ramp until left front
wheel is on top of block.
Table 6-21. Wheel Torque Chart - 9 Lug
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
40 ft. lbs.
(55 Nm)
95 ft. lbs.
(130 Nm)
170 ft. lbs.
(230 Nm)
Table 6-22. Wheel Torque Chart - 10 Lug
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
70 ft. lbs.
(95 Nm)
170 ft. lbs.
(225 Nm)
300 ft. lbs.
(405 Nm)