Harper Butler Arm Bed A84X101, Manual

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Arm Bed
15 14
Troubleshooting
The most common problems with a power unit are due to low voltage from a battery, fuse
failure, faulty wire or a failing ground connection. To narrow down the problem, connect
jumper cables to the pump (positive to input side of solenoid & negative to the ground on
pump base). Use a separate good battery (from another vehicle or a new battery). If the
pump and bed operate properly, then have the battery tested, check in line fuse and power
cord, and/or run ground cable directly to the battery instead of inside the tool box or frame.
If the pump does not operate properly with jumper cables, then check solenoid and/or mo-
tor.
PROBLEM SOLUTION
Power unit not responding to
remote when toggle is acti-
vated
Use test light on remote connections to solenoid. If any connec-
tions are not working, the problem is in the remote. If all connec-
tions are working, check solenoid. If solenoid is working properly,
the problem is in the pump motor.
Motor is humming or bed is
operating slowly
Pump motor is failing.
One of the four operations is
not working. Example: bed
will lift, lower and squeeze in
but will not squeeze out
Check wire on cartridge valve coil for a short or take coil off and
activate remote while putting a screwdriver inside coil. If screw-
driver does not magnetize to coil, the coil is failing. If coil is mag-
netizing, then failure is in cartridge valve.
Arm Bed arms are not mov-
ing in unison (synchronized)
(The most common problem
after hoses are replaced.)
1. Squeeze arms together above the welded stops. Assist the
arms by hand if needed until they are both at maximum squeeze
point. Hold toggle active for 20 seconds in order to clear air from
lines.
2. Check rubber bumpers that are on each arm on the opposite
side of cylinder hook up point.
Bale drops on its own when
suspended in the air or will
not maintain a tight squeeze
Turn the counter-balance valve ¼ turn clockwise until bale
suspends normally. Do not tighten screw all the way in.
Arms pivot are not
moving fast / pressurizing
but not moving
Check for debris in the check valve. Make sure spring plunger is
not broken.