Platform Will Not Lower Using Platform Control - JLG 10VP Service And Maintenance Manual

Platform Will Not Lower Using Platform Control

Overview Of Procedure
This procedure tests for ground coming out of the MC-1 box to the dump valve circuit and through to the ground control tog-
gle switch.
Check For These Obvious Conditions First:
• Battery voltage 24 volts. (Fully charge batteries)
• Hydraulic oil is within it's specified operating temperature range.
STEP
Will machine lower manually, using the manual descent knob?
1.
Will machine lower from ground control switch?
2.
Note: Key switch must be set to GRND to check this.
3. Check for ground on the Tan, 4-1 wire at the MC-1 box, X105 con-
nector, pin 6.
Check for ground on the Tan, 4-1 wire at the lift down coil.
4.
Check complete pump motor circuit . (See Table 3-21)
5.
3120728
Table 3-23. Platform Will Not Lower Using Platform Control.
ACTION
SECTION 3 - TROUBLESHOOTING
SPEC
—
—
—
—
—
– JLG Lift –
YES NO
Go to Step 2 See (Table 3-26)
Go to Step 3 See (Table 3-23)
Repair/Replace
Go to Step 4 Joystick/
MC-1 Box
Replace/Repair
Go to Step 5 Wire or
Connection
— —
3-33