Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Engine Cooling System
Preventive Maintenance
PREVENTIVE MAINTENANCE (PM) INTERVALS
I A B C D E
At the first 15,000 mi./
24,000 km or at the first
PM
15,000 mi./24,000 km/
Monthly
30,000 mi./48,000 km 60,000 mi./96,000 km/
6 months
120,000 mi./
192,000km / Annually
240,000 mi./384,000 km
SYSTEM COMPONENT MAINTENANCE TASK
Recommended
PM Interval
I A B C D E
Cooling Hoses Check the radiator and heater hoses for leaks. X X
Extended Life Coolant (ELC) Check the freeze point (see page 143). X
Check for contamination using test strips (see page 145).
X
Replace blank water filter if applicable.
Perform lab analysis (see page 145).
If lab analysis shows coolant is unsuitable for continued use
Flush, drain, and refill (see page 143).
Add ELC Extender (see page 145).
Flush, drain, and refill with new coolant (see page 143).
X
Fan clutch housing Check for air leaks. X X
Surge Tank Fill Cap Check fill cap seal at each oil change. X X X X X X
X
X
– 148 – Y53-6008 Medium Duty (R10/06)