Alto ATS 46 Troubleshooting Manual page 12

PROBLEM
Noise in system
Slow wheel motor speed
Dump door drifting closed
American-Lincoln Technology
ATS 46/53 Troubleshooting Guide
PROBABLE CAUSE
1. Low hydraulic oil level
2. Air entering suction line
3. Drive belt slipping
4. Relief valve setting low
5. Hydraulic motor damaged
1. Engine speed low
2. Pedal linkage incorrectly adjusted
3. Piston pump damaged
4. Drive motor damaged
1. Damaged check valve block
2. Damaged dump door
3. Damaged control valve
TROUBLESHOOTING TABLE
REMEDY
1. Inspect the oil level in the reservoir and
add oil until visible in the sight gauge.
2. Inspect the suction hose for damaged
O-rings or ruptures. Replace the hose
of O-rings as required.
3. Inspect the auxiliary pump drive belt and
tighten or replace as required.
4. Install pressure gauges at the "T" fittings
of the auxiliary pumps. If the maximum
pressure reading is below 1000 PSI with
the steering wheel turned to the right or
left hand stop. adjust the relief valve in
the pump. If the maximum pressure
reading at port "B" of the belt driven
pump is below 1500 PSI, adjust the relief
valve in the squeegee vacuum motor.
If the maximum pressure reading to the
output of the auxiliary pump is below
2500 PSI, adjust the relief manifold.
5. Inspect the hydraulic motors for bearing
wear by checking motor shaft end-play.
Replace damaged motor(s).
1. Adjust engine governor to proper speed
setting.
2. Inspect and readjust linkage as required
3. Measure pump output flow with a flow
meter. If the flow is 0.5 gpm below the
minimum normal operating flow, repair
or replace the pump
4. If above efforts fail, replace the motor.
1. Remove check valve block and inspect
for debris or damage and repair or
replace as required.
2. Repair or replace the dump door
cylinder
3. Repair or replace the contol valve
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