beco822

Fan is on with or without the A/C only 

2005 Mack Granite Couple days ago at the end of the day I noticed the fan clutch engaged as it should.Problem is it will not shut off.From what I understand there are 4-5 sensors that make this happen.Truck is showing no check engine lights.Any ideas where to start?

Pro’s and Con’s of this year model 460 motor

Mackpro do u know off the top which turbo that would be?And I take it my nearest Mack dealer would have to do the download or is there another source for that?

CL 700 #1M2AD05C41M011889 

Have a 2001 E-Tech 300 with a T2070 tranny.Would like to up the HP if possible.What is the safest and best way to go? 011889 is the last 6 of the Vin #.

Update.We just installed the ReMack water pump with the pulley already installed,a new set of bolts with the spacers.Fingers crosses!

On ‎2‎/‎27‎/‎2018 at 7:51 AM, dogg rescue said:

I had this problem, but it was due to having had a bent fan clutch from a belt hopping off. How often do your bolts break? 

replaced original fan clutch with a Kit Masters and after the fourth time breaking the bolts replaced it with an original Horton and no change.Broken bolts 3 more times after the change.

On ‎2‎/‎27‎/‎2018 at 11:34 PM, Dirtymilkman said:

When I bought my 2001 cl new it was doing that. They put 4 water pumps on and the spacer kits. Still ended up snapping bolts. I finally called enough numbers and got engineering, they asked for my opinion. I told them it should have a plastic fan instead of steel. They sent out a new plastic fan and horton clutch and water pump. Mack installed, never had an issue in a million miles. 

yeah we ditched the 8 blade metal fan and replaced it with a plastic fan and still having the same issue.

On ‎2‎/‎27‎/‎2018 at 9:42 PM, br549 said:

Is this a E-Tech engine or E-7? Are you using the  old pulley on the water pump?  If so try a remack w/pump with the pulley already on it.  If they are out a few thousand they will break the bolts out at high rpm.  This is on an E-Tech engine

Yes sir its an E-tech and I have had 3 different waterpumps since this started.But have been taking the pulley off and reusing it each time>

Looking at buying a 2007 Mack Granite Dump with the MP7 370 hp motor with 497,000 miles.Looking for you guys input,Good and Bad.Thanks!!

This topic has been discussed before and unfortunately I am at a dead end.Have 2 Water pump bolts that keep breaking off I have replaced the Harmonic Balancer and have updated the bolts with the spacers per Mack’s bulletins on this problem.New fan,new Mack water pump,new Mack fan clutch,water pump housing,belt,belt tensioner,alternator.Everything on the front of this motor is new from Mack and I keep having the same issue.Any help would be much appreciated!