Allied H6G, Руководство по обслуживанию

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Section 3
3 - 5
HI-SPEED Pressure Check
With the engine shut off, connect a 1000 psi pres-
sure gauge in line on the HS hose at the logic control
manifold. Start the engine and measure pressure with
the
HI-SPEED switch activated. Pressure should be as
specifi ed in Figure 3-5. The HI-SPEED mechanism also
incorporates a pressure switch and electric relay. The
pressure switch opens at a set load on the winch when the
winch is operated in
HI-SPEED . The HI-SPEED electric
signal is opened when the relay opens and the winch
automatically shifts to the slow speed mode. To check that
this feature is functioning properly without wire rope on
the drum disconnect and plug the brake pressure hose.
Activate the
HI-SPEED switch and operate the winch in
LINE-IN . Pressure at the HS gauge should decrease to
a low value equal to case pressure, and the LED light in
the
HI-SPEED switch will deactivate.
If the HI-SPEED pressure is not as specifi ed in Figure
3-5,
check for:
1. Improper pilot supply pressure.
2. Malfunctioning solenoid valve.
3. Leaking pressure hoses or fi ttings.
4. Restriction in pressure hose or manifold port
If the HI-SPEED automatic shift down does not function,
check for:
1. Faulty pressure switch or relay.
2. Stuck motor speed spool.
LINE-IN Pressure Check
With the engine shut off, connect a 1000 psi pressure
gauge in line on the RI hose at the logic control manifold.
Start the engine and measure pressure with the control
lever in the
LINE-IN position. Pressure will be greater
than the standby pilot pressure due to mechanical drag
and if there is resistance on the winch such as a high
FREESPOOL drag setting. Pressure should be as speci-
fi ed in Figure 3-5.
If the LINE-IN pressure is not as specifi ed in Figure 3-5,
check for:
1. Improper pilot supply pressure.
2. Malfunctioning control lever.
3. Leaking pressure hoses or fi ttings
4. Restriction in pressure hose or manifold port
LINE-OUT Pressure Check
With the engine shut off, connect a 1000 psi pressure gauge
in line on the RO hose at the logic control manifold. Start
the engine and measure pressure with the control lever in
the
LINE-OUT position. Pressure will be greater than the
standby pilot pressure due to mechanical drag and if there
is resistance on the winch, such as a high
FREESPOOL
drag setting. Pressure should be as specifi ed in Figure 3-5.
If the LINE-OUT pressure is not as specifi ed in Figure
3-5, check for:
1. Improper pilot supply pressure.
2. Malfunctioning control lever.
3. Leaking pressure hoses or fi ttings.
4. Restriction in pressure hose or manifold port.
Valve Setting Procedures
Load sense relief valve
Disconnect brake hose from logic control manifold. Plug
manifold brake port. Connect a 5000-psi gauge to mo-
tor test port A. At engine idle, hold winch control lever in
LINE-IN position for 5 seconds while monitoring gauge.
Adjust valve IN to increase, OUT to decrease. Setting is
3450-3600 psi.
Pilot supply reducing valve
See tractor service manual.