Monaco SIGNATURE 2001 series, Owner'S Manual

Page: 269 / 327

listen for any abnormalities. Abnormal air pressure readings by either needle of
the air gauge should alert the operator. Have the air system checked to avoid an
untimely failure.
Should a failure occur in the air system, preventing the air pressure from
building, it may become necessary to “cage” the spring brakes. This is an emer-
gency procedure only. Caging the rear air brake chambers manually overrides
the spring brakes and allows the vehicle to move. This procedure does not affect
normal service braking. The brake disabling procedure is located in Section 2.
NOTE: When the park brake is released, the Park illumination lamp will
remain lit until air system pressure is above 65 psi.
The motorhome is equipped with automatic slack adjusters. As brake linings
wear, the slack adjusters will automatically ratchet on the return stroke as need-
ed. This ratchet action will keep the brake linings at proper adjustment. Brake
adjustment should not be necessary. Indications of a vehicle needing a possible
brake adjustment may be noticed by the park brake not holding on a hill or
gradual loss of braking power. Automatic slack adjusters and the connecting S-
camshaft require periodic lubrication.
NOTE: Replacement parts should be of the same original equipment size
and type. Mixing brake components may result in unequal braking action.
Brake adjustments are part of normal maintenance of the motorhome.
Brake adjustments are not covered by Monaco Coach Corporation.
WARNING: Brake lining may contain asbestos material and should only
be serviced by qualified service technicians who are trained in the appro-
priate precautionary procedures. If any loss of braking effectiveness or
abnormal braking indications are noticed, the brakes and slack adjusters
should be inspected by a qualified brake technician.
The motorhome is equipped with an anti-lock braking system (ABS). The
ABS system monitors wheel rotation speeds by using a 100 tooth magnetic tone
ring mounted to the hub. Revolving with the wheel, the magnetic tone ring is
polarized giving positive and negative pulsations. A stationary sensor is mount-
ed adjacent to the tone ring monitoring the magnetic pulses. The pulses are
monitored by the ABS electronic control unit (ECU).
The ECU monitors all available wheel sensors at the rate of 100 times per
second. The ECU controls Pressure Modulator Valves. Pressure Modulator
Valves have two electric over air solenoids, a hold solenoid and a release sole-
noid. The modulator valves are open under normal braking, allowing a straight
through air signal from the treadle valve to the brake chamber. Should a wheel
lose traction under a braking application, the ECU will energize the hold sole-
noid of the Pressure Modulator Valve to interrupt the air signal from the treadle
Chassis Information
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S I G N A T U R E
1 0 • 2 6 9
BRAKE
ADJUSTMENT/
SLACK ADJUSTER
ABS SYSTEM
(Anti-lock Brakes)