JLG 1250AJP Service Manual - Manual (Page 73)

SECTION 3 - 1CHASSIS & TURNTABLE
3121171 – JLG Lift – 3-25
6. Tighten the 2 socket head screws M8x16 (4) with a
male hex head torque wrench at 18.4 ft.lbs. (25 Nm)
torque.
7. Repeat the above steps to engage the gearbox
again.
Operation:
a. Engaged gearbox
At this condition the motion is transmitted from
the hydraulic motor to the gearbox.
b. Disengaged gearbox
AT THIS CONDITION THE HYDRAULIC MOTOR AND THE BRAKE
ARE DISCONNECTED TO THE GEARBOX: THE WHEEL IS IDLE.
Maintenance Information
PERIODIC MAINTENANCE
The gearbox only requires the scheduled maintenance
procedures set out by the manufacturer (see Table 3-4).
Good maintenance will ensure an ongoing functioning in
time as well as maximum reliability.
Should irregularities in function arise, it will be necessary
to consult the troubleshooting checklist to find the most
adequate solution.
If unsuccessful, it may be necessary to partially or com-
pletely disassemble the gearbox.
CHANGING THE LUBRICATING OIL
1. Check that the gearbox axis is horizontal. Rotate the
gearbox housing until the drain plug is on the bot-
tom of the vertical axis of the end cover.
2. Unscrew the both plugs (Fill and Drain) and let the
oil flow in a large enough container; in order to facili-
tate draining the oil must still be warm.
3. Wait a few minutes until all the oil is drained and
then proceed to screw on the plugs.
4. Proceed with the oil fill-up. Refer to Filling-up the
Gearbox with Lubricating Oil.
NOTE: Never mix mineral oils with synthetic oils and vice
versa.
DO NOT DISPOSE OF THE OIL IN THE NATURAL ENVIRONMENT.
BE CAREFUL TO ELIMINATE IT IN COMPLIANCE WITH THE RELA-
TIVE RULES AND REGULATIONS THAT GOVERN LOCALLY.
Figure 3-18. Gearbox Disengaged
Table 3-4. Drive Hub Maintenance Schedule
Inspection Frequency Action
Tightening bolts After the first 50 operating
hours of the gearbox Bolt tightening
torque check
Oil level Every 150 operating hours
of the gearbox Refill oil if necessary
1
st
oil change
At 150 operating hours of
the gearbox Oil replacement
Next oil change Every 1200 operating hours Oil replacement