PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Section 22: HEATING AND AIR CONDITIONING
PA1553
26
FIGURE 27: GRINDING WITH THE BRUSH SEATER
STONE
22319
Repeat method a or b until brushes are fully
seated. Seating surface of the brush must be
no less than 80% of the face (Refer to figure
28).
FIGURE 28: SEATING SURFACE OF THE BRUSH 22320
CAUTION
After grinding with the sandpaper or the
honing stone, it is necessary to remove the
brushes from the brush holders and
vigorously clean with an air gun the
commutator and the seating faces of the
brushes to eliminate abrasive dust and dust
from brushes.
DANGER
Use a dust mask to prevent inhalation of dust
particles. Protect against electrical shock
when working on energized equipment.
Protect against falling or slipping when
working on rotating equipment.
CAUTION
If grinding is not carried out or is carried out in
an incorrect way, the brush may seat against
a restricted zone only, which will create a high
amperage situation for the commutator as for
the brushes and could seriously damage the
motor.
After grinding is completed, it is necessary to
check the evaporator motor amperage in 1
st
speed and in 2
nd
speed. Make sure that the
evaporator compartment door is closed and
that the reading is 30 A ± 3 in 1
st
speed.
Confirm that the reading is 64 A ± 4 (MAX 68
A) in 2
nd
speed.
9.3.6 Brush Holder Adjustment
NOTE
The brush holders are mounted on a support
that can rotate. Rotating that rocker ring will
move all the brush holders at the same time.
1. Remove the screws securing the grid and
remove the grid. Locate the 2 bolts fixing the
mechanism permitting the rotation of the
brush rocker ring.
2. Loosen (do not remove) the bolts just
enough to release the mechanism.
3. Move gently the exposed brush holder in
order to have 30 A ± 3 in 1
st
speed and 64
A ± 4 in 2
nd
speed when the door is
closed and a maximum distance of 10 mm
(3/8 inch) between the brush face and a
reference line passing through the center of
the 2 bolts on the motor housing.
CAUTION
If rotating the rocker ring is necessary, it is
preferable to mark off the angular position of
the rocker ring before unfastening the bolts
fixing the mechanism in order to get back to
the factory setting at the end of the operation.
NOTE
Take a final reading in 1
st
and in 2
nd
speed
after tightening the brush holder bolts. The
amperage may have changed.

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English