Owner`s manual

187
CHASSIS INFORMATION — 10
2008 LAPALMA XL
Electrical Pump & Master Cylinder
The electric pump motor provides reserve
power for the booster assembly. The entire
assembly should be replaced when a failure
occurs. When the electric pump motor is
working, there is only one-half the brake boost.
Caution should be taken as braking distance
is increased. To test reserve power, apply the
brake pedal with the ignition “OFF.” The electric
pump should run and be audible.
The design of the master cylinder provides two
separate brake uid systems (front and rear).
One system will operate should a failure occur
in the other. When checking the uid level in the
master cylinder, the uid should be clean with
no evidence of contamination. A surge of uid
should occur when the brake pedal is applied,
and uid level should be at the bottom of the
port ring openings. Since the master cylinder
is the highest point of the system, gravity ow
bleeding can be accomplished. Gravity ow
bleeding requires only one person and NO
pressure bleeder. Each caliper has a bleeder
valve for removing any air in the system.
Maintenance
Tires, suspension, wheel alignment and shocks
can affect braking performance and should be
inspected prior to checking the braking system.
Some problems and repairs are listed below:
Pedal fade is a good indication of leaks
in the system. Inspect and repair leaks.
Sluggish brake response indicates air has
been introduced into the system. Bleed
the brake system.
Excessive pedal travel or excessive
pedal effort relates to booster and master
cylinder.
Booster doesn’t function properly in
power or back-up mode. Repair the
booster and pump assembly.
Booster works only in the back up mode.
Repair the booster assembly.
Booster works only in the power mode.
Repair the back-up pump.
Dragging, grabbing, squealing or pulling
brakes require servicing pads and
calipers.
Park & Emergency Brake System
The motorhome parking brake is a foot pedal
brake which operates in the same manner as an
automobile parking brake. When at a complete
stop, select “P” (Park) on the transmission pad,
then engage the foot pedal parking brake. The
brake is released by the “brake release” handle,
located below the lower left area of the dash.
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eXhauSt Brake
The exhaust brake (Variable
Geometry Turbocharger)
is designed to supplement
the standard wheel braking
system. The exhaust brake
is not designed to bring the
motorhome to a complete
stop; however, it can assist in
controlling the speed of the
motorhome. Use of the exhaust
braking system can extend the
life of pads, shoes, rotors and drums, saving on
costly service brake repairs.
The exhaust brake system (Variable Geometry
Turbocharger) is an auxiliary braking device that
uses the turbocharger as the auxiliary braking
device. A switch (called exhaust brake) on the
driver’s console operates the auxiliary brake.
The auxiliary brake will operate when the switch
is on and the throttle is released.
How It Operates
When the auxiliary brake is activated, exhaust
pressure increases within the engine. Increased
exhaust back pressure slows the engine speed,
resulting in engine braking action. The amount
of engine braking power developed is related to
engine speed (RPM).
090396
080498m