JLG 10MSP Service Manual - Manual (Page 145)

SECTION 6 - TROUBLESHOOTING
3121228 – JLG Lift – 6-41
6.16 DRIVE SYSTEM TROUBLESHOOTING
Won’t Climb Grade
Overview Of Procedure
The following procedure checks the drive motor and attached components for component failure, misadjustment due to
wear.
Check For These Obvious Conditions First:
• Batteries are Fully Charged (24 Volts)
• Speed Control is Set to Maximum
• Is Grade within the Maximum Allowable Specification of 15% Grade
• Does the Travel Surface allow for Proper Drive Wheel Traction
• Is Platform Load within the Maximum Rated Capacity
Table 6-45. Won’t Climb Grade
STEP ACTION SPEC YES NO
1. Does machine drive straight on a level surface? — Go to Step 2 Refer to Machine
Won’t Drive Straight
(Table 6-47)
2. Do the left and right drive motor brakes release properly and allow the drive
wheels to rotate freely? — Go to Step 4 Dragging?
Repair, Replace or
Adjust Brakes
3. Check the amperage output of the on the drive motor leads. They should not
exceed maximum amperage while pulling a grade. — Controller will Shut
Drive Down and will
flash a 7 LED Code
Go to Step 5
4. Check the condition of the drive motor brushes. — OK, go to Step 6 Worn down,
replace brushes or
drive motor
5. If all above is OK, Drive motors are working properly. Consult Factory. — — —