Holiday imperial 2001, Руководство пользователя

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Chassis Information
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I M P E R I A L
1 0 • 2 5 3
Automatic slack adjusters and the connecting S-camshaft require periodic lubrica-
tion.
NOTE: Replacement parts should be of the same original equip-
ment 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 Holiday Rambler.
WARNING: Brake lining may contain asbestos material and should
only be serviced by qualified service technicians who are trained in
the appropriate 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 mounted 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 sec-
ond. The ECU controls Pressure Modulator Valves. Pressure Modulator Valves
have two electric over air solenoids, a hold solenoid and a release solenoid. 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 solenoid of the
Pressure Modulator Valve to interrupt the air signal from the treadle valve to the
brake chamber, while the release solenoid vents the existing air signal to the
atmosphere allowing the skidding tire to regain traction. Skidding tires have less
tractive efficiency. It is possible, under certain conditions, to have the wheel(s)
skid with a normal functioning ABS system.
The ABS itself does not apply additional braking power. The purpose of the
ABS is limiting brake torque to prevent wheel locking that results in the loss of
lateral stability and increased stopping distances. Cautious driving practices and
maintaining adequate safe distances when following vehicles is the key to safe
vehicle operation.
ABS Component Function:
• Speed sensors and tone rings on each wheel monitor wheel
rotation.
• Each speed sensor communicates wheel rotation pulses to
the Electronic Control Unit.
• ECU receives the speed sensor inputs, interprets the signal
pulses, calculates speed and acceleration rates of each
wheel.
ABS SYSTEM -
(Anti-Lock Brakes)