C - Peterbilt Motors Company

5
Maintenance Procedures
proximity. Failure to do
so could ignite a fire or
cause an explosion which
could result in serious
injury to you and/or
bystanders. Failure to
comply may result in
death, personal injury,
equipment or property
damage.
9. Start the engine and run it at idle
speed for several minutes. This
will allow any air in the system to
escape. Then turn the engine off
and check the system for leakage.
10. Re-start the engine. If the engine
does not start, or runs erratic,
follow the procedure under
“Starting After the Fuel Tank Has
Run Dry”.
5-28
Starting After the Fuel Tank Has
Run Dry
The following instructions should only
be used in emergency situations when
the fuel tank has run dry. Failure to
follow the starting instructions below
may damage the starter motor.
4. Fuel primer pump knob
5. Fuel primer pump
1. Loosen the fuel primer pump knob
(5) by rotating it counter-clockwise.
2. Next, operate the primer pump (4)
by moving the knob (5) in and out
until pumping resistance increases
noticeably. Then tighten the knob
by rotating it clockwise.
3. Operate the starter motor until the
engine starts.
NOTE: The maximum time
the starter motor can be
switched on at any given
time is 30 seconds.
4. If the engine does not start within
this time, allow the starter motor
to cool down for at least 1 minute
before repeating the procedure.
WARNING: Do not loosen
any fuel line fittings in order
to bleed the fuel system of
air. The system is under
high pressure which, when
relieved, could cause death,
personal injury, equipment or
property damage.