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I would wash out the existing element, but the unwanted visitors (see other post) already chewed on a number of the outer folds and wrecked the filter. I would very much like to change out to 1400x20 tires, as we have all kinds of extra old style NDCC tires from the bridge trucks, but the...

Thanks for all the help. Now have all WIX filters except for the air, which I will have to order from a military parts supplier. Any suggestions for best service/price on a 5 ton multi/Mack filter element?

The two fuel filters appear to be correct, but the oil filter (full flow) is not the 51233. The bypass oil filter is the same as a gasser, 51021 per the manual. Anyone else know the full flow oil filter # (WIX or NAPA)? The 51233 filter is a huge outside mounted unit like over the road...

I think the air filter is the same as the multi, and WIX numbers? Thanks

Could anyone please list the WIX/NAPA/Hastings filter numbers for the ENDT-673 engine used in the A1 trucks. Just won a tractor on e-bay, and I am sure that the filters will need to be changed. Expect to need air, both fuel, and both oil sets. Also, anyone had any experience with these trucks...