Manual Transmission; Cold Weather Starting - PREVOST Motorcoach XL Series Operator's Manual

At any time in this sequence, simultaneously
pressing the UPSHIFT and DOWNSHIFT arrows
directs the ECU to enter the transmission
diagnostic mode as described under "Diagnostic
Codes" on page 4-6. D, N, or R may also be
selected on the shifter at any time - the OLS mode
will abort and normal transmission will commence.
Shifts are not inhibited.
Oil level sensor (OLS) codes
CODE
OL-OK
LO-01
LO-02
HI-01
HI-02
OL-50
OL-59 engine speed (rpm) too high
OL-65
OL-70 sump oil temperature too low
OL-79 sump oil temperature too high
OL-89
OL-95

MANUAL TRANSMISSION

Do not overfill the transmission. Overfilling usually
results in oil breakdown due to excessive heat and
aeration from the churning action of the gears.
Early breakdown of the oil will result in heavy
varnish and sludge deposits that plug up oil ports
and build up on splines and bearings. Overflow of
oil escapes onto clutch or parking brakes causing
additional trouble. However, if oil level is too low,
gears will be insufficiently lubricated.
CAUTION:
Do not tow vehicles equipped with
manual transmissions without first pulling the axles
or disconnecting the drive shaft. Lubrication of the
internal gear train is inadequate when the vehicle
is towed.

COLD WEATHER STARTING

Cold starting aid (Ether)
(Optional)
The vehicle may be equipped with an electrically-
operated ether cold starting aid designed to ease
CAUSE OF CODE
oil level is correct
one quart low
two quarts low
one quart high
two quarts high
engine speed (rpm) too low
neutral must be selected
output shaft rotation
sensor failure
STARTING AND STOPPING PROCEDURES
engine starting when temperature is below 35°F
(2°C). The control rocker switch, located on the
L.H. lower switch panel (see page 2-14), is
provided with a locking mechanism to avoid
accidental use when engine is running.
activate the ether starting aid, proceed as follows:
1. Prior to cranking engine, slide down lock tab
while pressing rocker switch for three (3) seconds
to fill solenoid valve.
2. Release switch to discharge shot.
3. Allow three (3) seconds for shot to discharge.
4. Start engine, use additional shots if necessary
to keep engine running.
CAUTION:
This practice should be performed
only when absolutely necessary. Excessive use of
fluid could result in serious engine damage.
Engine block heater
The vehicle is
immersion-type electric block heater to assist cold
weather starting. The heater male electric plug is
easily accessible through the engine oil reserve
tank access door. To use it, connect the female
plug of an electrical extension cord to the heater
plug. Some converted vehicles may have the
heater connected to the coach AC power system.
The extension cord must be plugged into a
110-120 V AC power source only. The engine
block heater should be used whenever the vehicle
is parked for an extended period of time in cold
weather and a suitable power source is available.
CAUTION:
Use only a 110-120 V AC power
source. Extension cord must be of the grounded
type (three prongs) and have a minimum rated
capacity of 15 amps. Be sure to disconnect cord
before starting and/or moving the vehicle.
Engine warm-up
After starting the engine, run it at low idle for two
(2) minutes to allow flowing of lubricant to the
turbocharger, then increase speed to fast idle for
warm-up period by using "FAST IDLE" switch
located on L.H. lower switch panel (see page 2-
14). Run the engine at fast idle and no load for
about five (5) minutes to allow it to warm-up before
applying a load. Parking brakes should be kept
applied throughout warm-up.
indicator lights should be monitored to check that
all conditions are normal. If an abnormal condition
4 - 7
equipped with an
Gauges and
To
engine