Oshkosh Corporation JLG 20MSP, Руководство по обслуживанию и ремонту

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SECTION 6 - TROUBLESHOOTING
31215825 6-21
Code 06 - Drive Motor Brush Wear Warning Indicator
Check For These Obvious Conditions First:
• Did the Brush Wear Indication relay get wet. If so, dry the relay and wire terminals and reset the Brush Wear Warning Timer.
• Program Ground Control Station module to reset the Brush Wear Warning Timer - see Section 4.6, Ground Control Station - Pro
-
gramming.
• If machine has accumulated a lot of hours in service since new or the last brush replacement, check the Drive Motor Brushes - see
Section 3, Replacing Drive Motor Brushes - for brush replacement instructions.
Code 07 - Left Drive Motor - Disconnected
Check For These Obvious Conditions First:
• Check left drive motor M1 connector at the Traction Control Module for secure and proper connection.
Table 6-9. Code 06 - Drive Motor Brush Wear Warning Indicator
STEP ACTION SPEC YES NO
1. If the WORN code immediately comes up again after resetting, then
check the voltage at the brush wear indication relay where the wires
(wht/red 57-1 and 57-2) from the drive motors connect at terminal
(#85).
If there
is voltage on relay terminal #85, you have a problem with the
motor.... check for voltage at the terminals at the motor to determine
which motor has the bad brushes
0 Volts
Problem is in
motor, brushes
need replace -
ment
Go To Step 2
2. If there is
no
voltage at terminal #85 on the wear indication relay, and
there is voltage on relay terminal #87, you have a problem with the
relay or the wiring
—
Check relay
or wiring
Go to Step 3
3. If there is no voltage at relay terminal #85, and there is no voltage on
relay terminal #87, you have a problem with the wiring or controller
if the code immediately repeats —
Replace wiring
or GCM
—
Table 6-10. Code 07 - Left Drive Motor - Disconnected
STEP ACTION SPEC YES NO
1. Check resistance across positive (+) and negative (–) drive motor
leads in M1 connector wiring harness going to the left drive motor. Is
reading within spec?
.1 to 3 ohms
Replace Traction
Module
Go to Step 2
2. Repair or replace left drive motor wiring, brushes or motor.
(For brush replacement, see Section 3 of this Service Manual)
— — —
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