Mec 2033ES - Page 64

October 2008 "2033ES / 2633ES" Service & Parts Manual - ANSI Specifications
Page 4-10
PROBLEM REMEDY/SOLUTION
No Drive above
limit switch
HIGH pressure
indicated at
Test Port TP-1
Troubleshooting (continued
POSSIBLE CAUSE
DRIVE (CONTINUED)
STEER
Pothole system not deployed Clear debris from under pothole bars
Check pothole linkage operation
Pothole limit switch/s LS2 &
LS3 inoperative
Check switch/es for presence of Ground on wire 151
when pothole bars completely deployed
No Drive above
limit switch
LOW pressure
indicated at
Test Port TP-1
Decel valve SV7 inoperative -
earlier units only
Check for power to SV7 while driving
Check valve for contaminations
Replace valve
Pump output reduced due to
wear
Test pump with a flow meter
Replace
Speed
uncontrollable
while
descending a
hill
Counterbalance Valve CBV1 out
of adjustment
See “
Setting Counterbalance Valves ” in this section
Replace valve
No Steer
Either direction
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
No power to SV1 Check for broken wires between lower control box
and SV1 valve
Steering Cylinder internal failure Inspect, replace seals
No Steer
Either direction
Pump motor
NOT operating
while
attempting to
steer
No Steer
Right only
Pump motor
NOT operating
while
attempting to
steer
Micro-switch S4 inoperative Check operation of micro-switch located in upper
control box in joystick handle
Damaged wiring or poor plug
connection
Check wire 7 through plug connections from upper
control box to Diode Board
Failed diode in diode board Test diodes on diode board
Replace diode board
Selector switch S6 inoperative Check for power on wire 3 and 3a when steer
attempted
Broken wire in joystick handle Check for broken Blue wire in joystick handle