JLG 740AJ, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-2 3121160
3. The tightening of the nuts should be done in stages. Fol-
lowing the recommended sequence, tighten nuts per
wheel torque chart.
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.
3.2 EMERGENCY TOWING
RUNAWAY VEHICLE/MACHINE HAZARD. MACHINE HAS NO TOWING BRAKES.
TOWING VEHICLE MUST BE ABLE TO CONTROL MACHINE AT ALL TIMES. ON-
HIGHWAY TOWING NOT PERMITTED. FAILURE TO FOLLOW INSTRUCTIONS
COULD CAUSE SERIOUS INJURY OR DEATH.
MAXIMUM TOWING SPEED 5 M.P.H. (8 K.M.H.)
MAXIMUM TOWING GRADE 25%.
DO NOT TOW MACHINE WITH ENGINE OPERATING OR DRIVE HUBS ENGAGED.
1. Retract, lower and position boom in travel position; lock
turntable.
2. Disconnect drive hubs by inverting disconnect cap.
3. Reconnect the drive hubs by inverting the disconnect
cap when towing is complete.
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
70 ft. lbs.
(95 Nm)
170 ft. lbs.
(225 Nm)
300 ft. lbs.
(405 Nm)
Figure 3-1. Drive Disconnect Hub