"2033ES / 2633ES" Service & Parts Manual - ANSI Specifications October 2008
Page 4-11
PROBLEM REMEDY/SOLUTION
Troubleshooting (continued
POSSIBLE CAUSE
DRIVE (CONTINUED)
No Steer
Left only
Pump motor
NOT
operating
while
attempting to
steer
Micro-switch S5 inoperative Check operation of micro-switch located in upper
control box in joystick handle
Damaged wiring or poor plug
connection
Check wire 8 through plug connections from upper
control box to Diode Board
Failed diode in diode board Test diodes on diode board
Replace diode board
No Steer
Right only
Pump motor
OPERATES
while
attempting to
steer
Steer valve SV1 not shifting Check power to SV1
Remove SV1 and check for contaminations
Replace SV1
Steering linkage binding Inspect - lube linkage, replace as necessary
Steering Cylinder internal seal
failure
Inspect, replace seals
No Steer
Left only
Pump motor
OPERATES
while
attempting to
steer
Steer valve SV1 not shifting Check power to SV1
Remove SV1 and check for contaminations
Replace SV1
Steering linkage binding Inspect - lube linkage, replace as necessary
Steering Cylinder internal seal
failure
Inspect, replace seals
Drives in one
direction
regardless of
direction
request
Steer valve SV1 sticking Inspect SV1 valve for debris
Replace SV1
Drive valve SV1 powered in one
direction
Short in wiring, faulty diode board.
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