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Old 06-17-2014, 06:05 PM   #1
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Water pump belt

I have a 2005 Fleetwood Expedition with the rear radiatior and the C-7 CAT. engine. Does anyone have any ideas on how to access the 2 bolts that mount the tensioner pulley for the water pump belt ? Maybe my real question is what type of tool I need to loosen the bolts. I do know it takes a 1/2 wrench but the type has me stumped. A socket will not work, a open end/box end could be a possibility but to date I have not found the one to do the job. Ideas anyone?

Thanks in advance.

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Old 06-17-2014, 07:05 PM   #2
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Location: Southern Illinois
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I have never seen my engine yet except from looking through the side door at the air filter. If you know it is a 1/2 in wrench and yours will not go on it, it might need a 12 point socket or wrench. You might be using a 6 point (hex) head wrench. If you could look at it or feel it you could be sure it it not an allen head bolt. They use a lot of those on engine parts. I have seen a lot of allen head and 12 point bolts used on engines. If I was still working I could look at one. I may have to break down one of these days and try to see my engine.
Here is a thread I found on google.
Caterpillar - Belt question

And another one. Maybe one will have a hint of what you need.


Ron KB9TF, Fulltime
2008 Tiffin Phaeton 40 Foot QSH
2011 Honda CRV with Blue Ox towbar and brake
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Old 06-17-2014, 07:47 PM   #3
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I can get the wrench on the 2 bolts but not a lot of room to move.

I did click on the link that you were kind enough to include with your reply. It seems to describe the procedure pretty well. When I have more time I will need to remove the access panel on the bedroom floor and take it from there. I may also need to p/u a boxed end wrench that is not off set.
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