Hydro Cat 5015B
Service Manual
WHEEL DRIVE SYSTEM
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Problem: No Reverse Drive (Forward 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 back of the drive pedal and watch the reverse contactor (see
Figure 15).
*
If the reverse contactor engages when the drive pedal is pressed, check the contacts in the reverse
contactor, replace the forward/reverse contactor assembly if necessary.
*
If the reverse contactor does NOT engage, go to step 2.
2
See Figure 15. Disconnect the diode (at the end of the Red/Green wire) and the Violet wire from the
reverse contactor. Connect a DC voltmeter to the wire and the diode as shown.
*
Turn the key switch ON,
push down on the
operator’s seat, and press
the back 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 assem-
bly.
FIGURE 15
71
Violet
Diode
Red/Green
Reverse Contactor
