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EN707 Water Pumps


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I'm not sure what's wrong with your water pump, but one used to be able to obtain new bearings and seals from Mack Trucks.

Double check this with a parts book, but I believe the EN707s used 46AX451 and 46AX452 bearings (the flathead water pumps used 46AX387 and 46AX389 bearings).

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I concur with kscarbel2. If you can get the parts, they are not terribly difficult to rebuild yourself, however having a bearing press (or access to one) is critical. Any better commercial bearing supplier should be able to measure your bearings and get you new ones.


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Matt's phone number is 203-266-6455, he is awesome to deal with and has a good selection of parts. If he doesn't have one let me know; I have a 707 in a B70, but I would have to see if the pump is any good. Best of luck with your truck.

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  • 2 years later...

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