Problem 22
No swing operation, engine does not load.
POSSIBLE CAUSES
No voltage through control handle to controller; No voltage out of controller to pump EDC; Wiring or
switch is faulty; Node is damaged; A pump or motor is damaged; Swing holding brake switch actuated.
CHECKS
Check brake signal and pressure; Check swing handle command in problem direction; Check computer
signal to brake and pump EDC; Check pump and motor pressure; Check items on DRUM screen.
Yes
No
Is 1 displayed after swing brake
and swing lock on screen?
Yes
No
Yes
No
Ok
Not Ok
Yes No
Yes No
When handle is enabled, does CAN bus screen: Swing right Packet #33
bank, 2 change by 32? Swing left Packet #33 bank, 2 change by 16?
Consult dealer/factory.
Replace switch or wiring.
Check wiring connector at pump EDC.
Repair connector. Consult dealer/factory.
Manually stroke swing pump. (See Section 2 - Manual Override Tests).
Does platform rotate?
Isolate and manually the stroke pump. Is system pressurized?
Is 0.1 to 2.0 volts present at pump(s) EDC?
Replace pump EDC.
Repair or replace motor.
Repair or replace
wiring to PC or consult
dealer/factory.
Repair or replace pump.
When moving handle fully in both directions, does SWING screen
read 0.5 to 2.4 volts in left or 2.6 to 4.5 volts in right direction?
Yes
No
Replace control
handle or repair wiring.
Yes
No
Is there voltage to swing handle? Center switch (CS) displays 1 on screen.
Consult dealer/factory.
Replace control handle or repair wiring.
Yes No
Are 24 volts present at brake switch?
Yes
No
Move brake switch
to off position.
Does Packet #57, bank 1 change by 4 when moving swing brake switch?
Yes
No
Replace switch or control
handle or repair wiring.
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