2012 · Mack · Granite · Mack MP7
2012 Mack Granite - MP7 - Overheating under load, Cooling Fan Won't Engage
0 Verified
2 Suggested
Issue / Concern
I'm running a 2012 Mack dump truck. Whenever I'm fully loaded and hitting a hill, the water temp shoots up to 230 and I have to back off. The big problem is I never hear the cooling fan kick in. It should sound like a jet engine at those temps. I've checked the fuse for the fan clutch and it's good. Is there a way to manual-jump the fan to see if the clutch is actually working?
Mileage
None indicated
Symptoms
None indicated
Tests Performed
No
System
None indicated
DTC Codes
None indicated
Keywords
None indicated
Already tried
Replaced the thermostat and the coolant temp sensor. Checked fan clutch air line for leaks.
BigRigBenny37· 202d ago