Operating Instructions
– 30 –
Y53-1030A 12/09
PACCAR
Vehicle service brakes must always be used. The engine
brake is not intended to be used as the primary brake of the
vehicle, nor is it an emergency brake. The engine retarder
only helps the service brakes by using pressure to slow the
divetrain. Use the service brakes for quick stops.
CAUTION: Exceeding governed engine speed
can cause engine damage. Operating the engine
beyond the maximum engine speed may cause
serious engine damage and is considered
engine abuse. Use the engine and vehicle brak-
ing systems to control engine speed.
The optimum braking power of the engine (VGT) exhaust
brake is reached at rated engine speed. Correct gear
selection, therefore, is critical.
Ty p i c a l l y, o n v e h i c l e s e q u i p p e d w i t h a u t o m a t i c
transmissions, the engine electronic control module (ECM)
and the transmission will deter mine the correct gear
selection.
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Страница 16: ...Introduction 10 Y53 1030A 12 09 PACCAR ...
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Страница 58: ...Maintenance Guidelines 52 Y53 1030A 12 09 PACCAR ...
Страница 60: ...Service Literature 54 Y53 1030A 12 09 PACCAR ...
Страница 78: ...Maintenance Specifications 72 Y53 1030A 12 09 PACCAR ...
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