PREVOST H3-41 Maintenance Manual page 232

SECTION 06: ELECTRICAL
Charger Capacity
A charger supplying only 5 amperes will require
a much longer period of charging than a charger
that can supply 30 amperes.
9.9.1 Emergency Jump Starting With
Auxiliary (Booster) Battery.
DANGER
Off-board battery charger with a start boost
facility must not be used to jump start the
vehicle. This could damage the electrical
system.
Booster Block
The booster block is located near next to the
main power compartment and is accessible
through the engine R.H. side door (Figure 57).
Both booster and discharged batteries should be
treated carefully when using jumper cables. A
vehicle with a discharged battery may be started
by using energy from a booster battery or the
battery from another vehicle.
DANGER
Jump starting may be dangerous and should
be attempted only if the following conditions
are met:
The booster battery or the battery in the other
vehicle must be of the same voltage as the
battery in the vehicle being started, and must
be negative grounded.
DANGER
Follow the procedure exactly as outlined
hereafter. Avoid making sparks.
WARNING
DURING EMERGENCY JUMP STARTING ...
Cooling fans WILL start running for a short
while.
Keep hands away from cooling fans. Keep the
radiator door closed.
Wear eye protection and remove rings, watches
with metal bands and other metal jewelry.
68 PA1621 Maintenance Manual All Series | Revised Sept 2019
Apply parking brake and place the transmission
to Neutral (N) position in both vehicles. Turn off
lights, heater and other electrical loads.
The following procedure should be used only
when the batteries are discharged.
Do not attempt jump starting if you suspect the
batteries are charged. Inspect the engine
starting system prior to using this procedure.
To jump start, proceed as follows:
1. Remove the red protective cap from the (+)
booster block terminal located in the R.H.
side engine compartment;
FIGURE 57: X3 SERIES BOOSTER BLOCKS
FIGURE 58: H3 SERIES BOOSTER BLOCKS
2. Connect the red jumper cable to the positive
(+) post of the booster power source. If the
good battery is in another vehicle, that
vehicle's engine must be shut OFF before
connecting;
3. Connect the other end of the red jumper
cable to the positive (+) terminal on the
booster block;