American-Lincoln Technology
1-9
ATS 46/53 Troubleshooting Guide
TROUBLESHOOTING TABLE
PROBLEM
PROBABLE CAUSE
REMEDY
Squeegee slow or will
not lift
1. Low hydraulic oil level
2. Squeegee obstructed
3. Damaged valve and/or coil
4. Damaged check valve
5. Damaged squeegee cylinder
1. Inspect the oil level in the reservoir
and add oil until visible in the sight
gauge.
2. Remove obstruction.
3. Check the continuity of SV4 coil on the
cylinder control valve. With a
the harness leads to the coil,
scrub deck lift switch.
"RAISE" position,
12volts. I
required. If the voltage reading
i
SV4. Repair or replace
the valve and/or coil.
4. Install a pressure gauge as port "C3"
cylinder control manifold. With
on and squeegee switch
position, the gauge
If the reading
O-ring on
SV3, SV4, and SV5 and repair or
replace the cartridges as required. If the
solenoid valves appear functional and
the condition remain, replace the check
valve (CV1).
5. If the condition remains after the above
efforts, repair or replace the squeegee
cylinder.
across
voltmeter
activate the
With the switch in the
the meter should read
f
the voltage reading is 0, inspect the
harness and scrub deck switch and
replace as
s 12, inspect
on the
the machine
in the "LOWER"
should read 200 ± 25 PSI.
is below 175 PSI, inspect the
Squeegee will not lower
1. Low hydraulic oil level
2. Squeegee obstructed
3. Low hydraulic oil level
4. Squeegee obstructed
5. Damaged valve and/or coil
1.
2. Remove obstruction
Inspect the oil level in the reservoir and add
oil until visible in the sight gauge.
3. Check the continuity of SV6 coil on the cylinder
control valve. With a voltmeter across the
harness leads to the coil, activate the scrub
deck lift switch. With the switch in the "LOWER"
position, the meter should read 12volts. If the
voltage reading is 0, inspect the harness and
scrub deck switch and replace as required. If
the voltage reading is 12, inspect SV4. Repair
or replace the valve and/or coil as required.
4. Install a pressure gauge as port "C3" on the
cylinder control manifold. With the machine on
and squeegee switch in the "LOWER" position,
the gauge should read 200 ± 25 PSI. If the
reading is below 175 PSI, inspect the O-ring
on SV3, SV4, and SV5 and repair or replace
the cartridges as required. If the solenoid
valves appear functional and the condition
remain, replace the check valve (CV1).
5. If the condition remains after the above efforts,
repair or replace the squeegee cylinder.
Squeegee drifts down
1. Damaged solenoid valve
2. Damaged deck cylinder
1. Inspect SV6 in the cylinder control valve for
O-ring damage and debris. Repair or replace.
2. Repair or replace the squeegee cylinder.
