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The biggest problem was the 18000# rating. For the M35's and smaller trucks, if you don't need a title for any reason, here (NH) you just use a bill of sale, a VIN check form (very simple) and you can get your plates. Since most all 5 tons weigh over 18000# (not sure on the tractors) we were...

Truck was a private sale out of West Berlin, Mass. and was a surplus fire department truck that was sold as is to the owner previous to us. The process I described above was almost too easy, and required only the one page form, a stop at the Town clerk's office and a stop at the DMV. Any...

It would have made no difference, as the State would not let me register the truck for anything over 18000# without a title due to the "three axle rule", and since the truck never had a title I was sunk. In NH we can set the GVW at anything we want (somewhat within reason) so I don't have to...

We have owned our H2O truck since October 2005, and finally got it ready to run and road worthy last fall. When I tried to register it (no title, only a hand written bill of sale), I could only get a weight rating of 18,000 pounds, as it had never had a title, and since it has three axles the...

I know that the 5 ton was first designed around the 602 gasser by mostly IHC, but how late was this engine used in new trucks? Our H2O truck is a 1961 (per data plates) and was just wondering when the switch was made, and was it made all at once, to the Macks or over time until the multis came...

Can the Holley and get a Zenith from Saturn. Truck will idle much cleaner and run down the road great. Put one on the water truck first thing after trying to rebuild the Holley, and could not believe the difference. Son followed me up the highway to the job site on Tuesday, and the only...

Tractor will look great with a winch, now all you have to do is reverse your headlight position!

The M812A1 has a "line loc" installed by the hoist/body contractor. It uses a push button in the dash (electric) that controls an electrical solenoid valve mounted on one of the rear cross members and only works on the rear 4 brakes. You pump up the brakes, holding the pedal and pushing the...

Nice job. Like the black undercarriage and hi-lites. What paint (type/brand) did you use?

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

Be aware, it will smoke; a lot!!

I am the high bidder on the truck on e-bay, this is what generated the questions. I too agree that Mac and the wiz kids could have had an influence on the "standard" use of the multi, but I also can see Mack saying no way to a change to their engine for multi fuel use (would have required an...

Ever find the source of the noise?

Anyone know why, in their infinite wisdom, the Army decided to use the slightly tuned-up multi in the 5 tons instead of the ENDT-673 Mack, which had already proven itself in the early '60s? From what I've read, and what others have added through this site, the multi was hard pressed running a...

During the late '70s (I think) there was a large earthmoving project for the TVA in KY &/or TN where millions of cubic yards of earth was being moved. The major contractors, faced with the rising fuel costs of the time(!) started mixing used oil with the fuel for the equipment, using a 10%...

Looks too small to be from an 800 series. It may have come off a piece of construction equipment, that setup is very common, and available over the counter at larger truck/equipment supply houses.

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...

I have run a search on this topic, but still don't have a very good picture of the solution, except for a full replacement of the transfer case. Could it be as simple as an adjustment in the linkage? Are there detent balls/springs on the shifter rods? Bad/dirty oil causing who knows what for...

Measured rods on M812, 25" c to c. The axles are spaced at 56" c to c.

Now, at least the inside of the engine should be real clean! When we went to get our gasser 5 ton, it started and ran sort of OK, but when my son ran it around the field to get a feel for it, it really started to act rich and run bad. Gas was running out of the bell housing drain, and I...