Section 3
3 - 5
3. Measure the pressure at Motor Port A for LINE-IN
or Port B for LINE-OUT.
4. Loosen Load Sense Valve locknut. Turn adjusting
capscrew OUT to decrease pressure and IN to
increase pressure. Adjust pressures as shown in
Figure 3-6.
5. Reconnect brake pressure supply hose.
Brake Pressure Check
With the engine shut off, connect one 1000 psi pressure
gauge to the BR pressure test port on the logic control
manifold. Start the engine and operate the winch in LINE-
IN and LINE-OUT. Check pressure as indicated in Figure
3-6. The brake requires a minimum of 200 psi to release.
Low pressure will result in premature wear of the friction
discs and added heat generation.
If the brake pressure is not as specified in Figure 3-6,
check for:
1. Improper pilot supply pressure.
2. Malfunctioning handlever; low RI and/or RO pres-
sure.
3. Leaking pressure hoses or fittings.
4. Restriction in pressure hose or manifold port.
Brake Valve Pressure Check
With the engine shut off, connect one 1000 psi pressure
gauge to the BR pressure test port and one 1000 psi
pressure gauge to the RI pressure test port on the logic
control manifold. Start the engine and slowly meter the
handlever into the LINE-IN position while monitoring both
gauges. BR pressure will jump to full pilot supply pressure
when RI reaches the RI pilot setting of the valve. Check
pressure as indicated in Figure 3-6. The brake valve sets
the overlap between the hydraulic motor drive and brake
release. A low setting on the brake release valve will re-
lease the brake before the motor begins driving. A high
setting on the brake release valve will momentarily drive
the motor against the brake before the brake releases.
Note: Some brake valves are not adjustable.
Brake Valve Adjustment:
1. Slowly meter the handlever into the LINE-IN posi-
tion.
2. Measure pressure at BR and RI pressure test ports.
3. Loosen Brake Valve locknut. Turn adjusting capscrew
OUT to decrease pressure and IN to increase pres-
sure. Adjust pressures as shown in Figure 3-6.
FREESPOOL Pressure Check
With the engine shut off, connect 1000 psi pressure
gauges in line on the FS hose at the logic control manifold,
BR pressure test port, in line on the HS hose, and in line
on the DV hose. Start the engine and measure pressure
at each respective gauge with the FREESPOOL switch
activated. FREESPOOL mode simultaneously sends
pilot pressures to the FREESPOOL shifter fork, the
brake, the motor speed spool, and the bypass manifold.
All BRAKE-OFF functions occur when the winch is in
FREESPOOL mode. This includes a pilot pressure signal
that load senses the pump and elevates the pilot pres-
sure to each respective port. Therefore, pressures will be
greater than the standby pilot setting. The FREESPOOL
shift fork will shift at a minimum of 170 psi. However, the
added features of BRAKE-OFF mode will not be active
at this pressure. All pressures should be as specified in
Figure 3-6.
If pressures are not as specified in Figure 3-6, check
for:
1. Improper pilot supply pressure
2. Malfunctioning solenoid valve.
3. Leaking pressure hoses or fittings
4. Restriction in pressure hose or manifold port
5. Loose DV lube orifice in B motor port block fitting.
High 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
specified in
Figure 3-6. 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 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.
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