1-34 HOW TO HANDLE THE VEHICLE
ENG
(11) Jake Brake switch(for DDC engine)
This switch is used in conjunction with the right
lever of the combination switch. Pressing this
switch will actuate the Jake Brake and light up
indicator lamps on the instrument panel light
up. Unlike exhaust brake system, Jake Brake
system isolates fuel from entering the cylinder
and opens cylinder exhaust valves to release
compressed air, the effect reducing a net en-
ergy loss and preventing the engine from be-
MTS0714
ing overstrained.
Lowering the right lever of combination switch
actuates 4 Jake Brake cylinders, while turning
the switch on console box to "ON" actuates 2
Jake Brake cylinders. The operator is required
to elect the Jake Brake correctly according to
the road condition.
The Jake Brake is actuated only in such a state
that both accelerator pedal and clutch pedal
are not depressed. If either of accelerator pedal
or clutch pedal is depressed, the Jake Brake
is disengaged.
Caution
If both switches are actuated simultaneously, compressed
air is released from the 6-cylinder and actuate the Jake
Brake. Be careful of this.
Range
Description
1st
position
2nd
position
3rd
position
MTA0200
NO.of jake brake
cylinder energized
Effciency of Jake Brake
at each position
3 and 4
33%
1,2,3
and 4
67%
1 through
6
100%
https://www.truck-manuals.net/
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