Alto ATS 46 Troubleshooting Manual page 11

TROUBLESHOOTING TABLE
PROBLEM
Hopper lift cylinder slow
or will not lift
Dump door does not
function
Power steering binding or
hard
1-10
PROBABLE CAUSE
1. Low hydraulic oil level
2. Hopper overloaded.
3. Air in cylinders
4. Relief valve damaged
5. Damaged hopper control valve
1. Low hydraulic oil level
2. Door obstructed
3. Damaged relief valve
4. Damaged control valve
1. Damaged yoke bearings
2. Damaged steering unit
3. Damaged steering cylinder
4. Damaged hydrostatic drive pump's charge
pump
REMEDY
1. Inspect the oil level in the reservoir and add
oil until visible in the sight gauge.
2. Inspect hopper load and manually unload
hopper if overloaded.
3. Purge the cylinders by cycling the dump
system at least five (5) times.
4. Install a pressure gauge at the auxiliary
pump output "T" fitting. Activate and hold
the dump door lever in the "OPEN" position.
This will cause the relief valve RV1 in the
main manifold to open. The gauge will
indicate the valve's setting. If the reading is
below 2300 PSI, readjust or replace the
valve to achieve the 2600 ± 100 PSI setting.
5. If above efforts fail, replace the valve.
1. Inspect the oil level in the reservoir and add
oil until visible in the sight gauge.
2. Inspect the dump door for obstructions and
binding and repair as required.
3. Install a pressure gauge at the auxiliary pump
output "T" fitting. Activate and hold the dump
door lever in the "OPEN" position. This will
cause the relief valve RV1 in the main
manifold to open. The gauge will indicate the
valve's setting. If the reading is below 2300
PSI, readjust or replace the valve to achieve
the 2600 ± 100 PSI setting.
4. Cycle the dump door to the closed position
and hold the dump door lever. The gauge
should read 2600 ± 100 PSI. If it does not,
repair or replace the hopper control valve.
1. Inspect drive wheel yoke for bearing play and
tighten or replace as required.
2. Install a pressure gauge at a "P" of the
steering control unit. Block the front wheels
and jack up the rear of the machine and place
on jack stands such that the rear wheel clears
the floor. Start the machine and operate the
steering wheel. If the pressure gauge reads
more than 400 PSI while steering (except at
the full left and right stops), and the wheel
remains difficult to turn, repair or replace unit.
3. Repair or replace the steering cylinder
4. Install a pressure gauge at the auxiliary pump
output "T" fitting. Activate and hold the dump
door lever in the "OPEN" position. This will
cause the relief valve RV1 in the main
manifold to open. The gauge will indicate the
valve's setting. If the reading is below 2300
PSI, readjust or replace the valve to achieve
the 2600 ± 100 PSI setting.
American-Lincoln Technology
ATS 46/53 Troubleshooting Guide