operators_manual

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1. Fill cap
(service
point)
2. Pressure
cap (never
to be
removed)
3. Fill line
1. Remove the surge tank fill cap (1).
Do not remove the surge tank
pressure cap (2).
2. Fill the system with premixed
coolant through the surge tank fill
neck.
3. Start the engine and idle at low
RPM for 2 minutes.
4.
Top-off surge tank to base of filler
neck while idling, or ½ inch above
the MIN line, if applicable.
5. Run engine at a higher idle until
engine fan turns on and allow
thermostat to open.
6. Reduce idle to low RPM and top off
surge tank to ½ inch above the
MIN line.
7. Run engine a higher idle for 10
minutes.
8. Reduce idle to low RPM and top off
surge tank to ½ inch above the
MIN line.
9. Allow engine to cool, then top off
surge tank to the “COLD FULL”
mark, the base of the filler neck, or
the sight glass, if applicable.
10. Replace the surge tank fill cap.
NOTE
If the coolant frequently needs top-
ping-up or there
are any signs of cool-
ant leakage, consult a PACCAR Serv-
ice dealer.
ENGINE MAINTENANCE - Maintenance Procedures
Y53-1166-1G1 (08/2018) 67
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