SECTION 3 - BASE COMPONENTS
3-6
– JLG Lift –
3121228
Oil Filling Instructions
10 oz of gearbox oil will fill the gearbox cavity approxi-
mately half full. To check the oil level, rotate the wheel so
that the cover plugs are at 12 o-clock and 3 o-clock. Allow
the oil to settle. Slowly loosen the 3 o-clock plug. If oil
begins to come out then the oil level is sufficient. If no oil
is noticed at the 3 o-clock plug location, then remove both
plugs. Slowly add oil at the 12 o-clock plug location until
oil begins to seep out of the 3 o-clock plug location. Rein-
stall and tighten plugs to 6-8 ft-lbs.
Drive Motor Brush Wear - Warning Indication
The machines drive motors include brush wear sensors
that activate a warning indicating the drive motor brushes
will require replacment soon. This warning protects the
drive motors from damage due to extreme brush wear.
When the brush wear warning is activated the Ground
Control Station LCD screen will indicate a fault code of 6,
also the hourmeter is set to countdown 25 hours of
(DRIVE) operation remaining.
The Platform Control LEDs will indicate this warning with 8
flashing LEDs and an intermittent beep.
NOTE:
Only the drive function when used will affect the
hour meter count down once the warning has been
activated. The machine will operate normally until
the last 10 seconds of the 25 hour countdown.
During the last 10 seconds of the 25 hour (DRIVE) count-
down the machine will only drive in creep/turtle drive
mode and platform lift up will be disabled. At this point
cycling power on/off will only repeat the final 10 second
mode cycle.
The machine will not operate normally until the drive
motor brushes are replaced
(repositioning the brush warn-
ing sensors),
and the Ground Control Station is pro-
grammed to reset the Brush Wear - Warning Timer - see
Ground Control Module Programming in Section 4 of this
manual.
Wheel Drive Assembly - Removal From Machine
The electric wheel drive assemblies are mounted indepen-
tent of each other in the base frame at the rear of the
machine.
The wheel drive assembly consists of an 24V DC electric
motor driving a 30.68:1 ratio gear box, the assembly also
included a friction disk parking brake assembly. This
brake assembly is mounted internally on the drive assem-
bly between the drive motor and the gear box assembly.
1. Elevate the platform and remove the wheel drive
assembly cover and set aside, see Section 3.2 on
page 3-2.
2. Disconnect the positive battery terminals from the
left side battery.
3. Raise the rear drive wheels of the machine off the
ground, use a fork truck or floor jack. Place a block
or safety stand under machine.
4. Remove the drive wheel mounting lugs and remove
the wheel(s).
5. Disconnect the power harness terminals and brake
harness connector(s) from the drive motor.
6. Remove the six (6) hex head cap screws and wash-
ers attaching the drive assembly to the frame.
7. Carefully slide the drive motor assembly out of the
base frame assembly for disassembly.
