TROUBLE SHOOTING (cont’d)
LANTEC Product Support - Installation and Maintenance Manual
20
Install a pressure gauge in location 2.
Run the pump at its maximum RPM
and with the control valve in neutral
position, read the pressure gauge. If
the pressure is greater than 95 psi (6.5
Bar), it is too high. Consult the winch
manual section 4.3 HOSES for the
recommended hose and control valve
size, and install the correct size if
necessary. If the hose and control
valve are as recommended, check for
restriction in the return line from the
control valve to the reservoir.
2. There is excessive back
pressure acting on the
reverse port of the winch
motor. This back pressure
is usually caused by the
use of a control valve and
hoses that are too small.
It can also be caused by a
restriction in the return line
from the control valve to
the reservoir.
Remove hose lines from control valve
and with the spool in neutral, blow air
through the cylinder or motor ports.
The air should escape through the
return port on the valve. If the motor
ports in the valve are blocked by the
spool when the spool is in neutral,
remove the valve and replace with
correct valve.
1. Control valve is not correct
type. The correct control
valve must have all ports
open to tank when the
spool is returned to
neutral. See section 4.2.
CONTROL VALVE.
REMEDYPROBABLE CAUSE
8.4. BRAKE WILL NOT HOLD LOAD
when control valve is returned to neutral after pulling or lifting a load
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