16 drive system troubleshooting, Won’t climb grade, 16 drive system troubleshooting -41 – JLG 10MSP Service Manual User Manual

Page 145: Won’t climb grade -41, Drive system troubleshooting

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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.

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