Does the machine
drive?
(Elevate, Lower, and
Steer OK)
Is either or two brakes
manually released?
Is either of two brake
switches damaged or
disconnected?
Is drive unit da
Flip brake handle(s) at rear of
machine to engage brakes.
Yes
No
Replace brake switch. Note that
brake limit switch tabs are
delicate. Use caution not to
break off.
Yes
No
Replace driv
Yes
Driving slowly?
Are batteries fully charged?
If resistor is installed, check using Ohmmeter/Mult
setting). Resistance across resistor should be a
Drives slow when
lowered?
Drives fast when elevated?
Does not drive when
elevated?
Is mode limit switch
damaged or blocked with
debris?
Do pothole guards and
lock deploy properly?
Clean any debris from pothole arm
mechanism
Yes
Contact C
Consider board
Is mode limit switch
damaged or blocked with
debris?
Yes
Are brakes hot?
Drives intermittently?
Check wiring connection
integrity.
Is there moisture or
corrosion in any
connections?
Check
connections at
both pump and
board. See wiring
diagrams.
Yes, but not properly
Is machine tilted?
Is there a trouble
code displayed?
Refer to trouble
code table
Part #SUPO-613
REV E
Page 28 of 38
unit damaged?
ce drive unit
Yes
Are all connections to
drive joystick and drive
control board secure?
Reconnect
No
Is there moisture or
corrosion in any
connections?
No
Yes
Allow to dry for 24 hours and try again.
Board probably will need replacement.
Apply dielectric grease to connectors at
main wire harness.
Yes
Replace drive control board
and/or joystick.
No
Contact CEI for further troubleshooting.
Consider brake damage, broken joystick
handle (drive enable), bad hour meter, loose
connections in lower and upper control
Still no drive?
r/Multi-meter (400
ȍ
d be approx. 4
ȍ
)
tch
d with
Clean any debris from limit switch area.
Check for proper connection inside limit switch. (See wiring
diagram).
Replace mode limit switch.
Yes
Contact CEI for further troubleshooting.
Consider board failure or loose wiring.
tact CEI for further troubleshooting.
board failure, pothole interlock limit switch
failure
Clean any debris from limit switch area.
Check for proper connection inside limit switch. (See wiring diagram).
Replace mode limit switch.
Contact CEI for further troubleshooting.
Consider board failure or incorrect wiring.
or
Allow to dry for 24 hours and try again.
Board probably will need replacement.
Apply dielectric grease to connectors at
main wire harness.
Contact CEI for further troubleshooting.
Consider board failure
SUPO-613 HB-830 Troubleshooting Flowchart
Drive Problems
Revision A: Initial Release
08/02/2010
Is a drive motor
damaged?
Replace drive
motor.
Part #SUPO-613
REV E
Page 29 of 38