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Hydro Cat 5015B
Service Manual
WHEEL DRIVE SYSTEM
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Problem: No Forward Drive (Reverse Only)
DANGER!
BEFORE TROUBLESHOOTING THE DRIVE SYSTEM, JACK UP THE MACHINE SO THE DRIVE WHEELS
ARE OFF THE FLOOR AND PLACE JACK STANDS UNDER THE FRAME. THIS WILL PREVENT INJURY
IF THE DRIVE MOTOR STARTS DURING TESTING.
Note: All references to “right” and “left” are as viewed from the operator’s seat.
1
Open the front access panel and turn the key switch ON.
*
Push down on the operator’s seat, press the front of the drive pedal and watch the forward contactor (see
Figure 13).
*
If the forward contactor engages when the drive pedal is pressed, check the contacts in the forward
contactor, replace the forward/reverse contactor assembly if necessary.
*
If the forward contactor does NOT engage, go to step 2.
2
See Figure 13. Disconnect the diode (at the end of the Red/Green wire) and White/Red wire from the
forward contactor. Connect a DC voltmeter to the wire and the diode as shown.
FIGURE 13
*
Turn the key switch ON, push
down on the operator’s seat, and
press the front of the drive pedal.
*
If the meter reads 0 volts, go to
step 3.
*
If the meter reads 36 volts,
replace the forward/reverse
contactor assembly.
69
Reverse Contactor
Forward Contactor
Diode
Red/Green
White/Red