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I know that a gasser weighs about 2,000# w/o a can and the multi slightly less. My best guess for a big 855 Cummins is between 2,500 and 2,800# without the can.

Do a good tuneup and you will be impressed with the power and top speed. The gasser has more HP and FT# of torque than the multi and revs higher. Low speed performance is also good as it will lug under full load down to about 1,000 rpm with no problem. Mileage should be better than stock due...

I always thought that the 5.9 would make a great "modern" engine for the M35 and the 8.3 non-elec. would work great in a 5 ton, IF you had the time and money. Otherwise, go with the originals. We run the old water truck with the R6602 gasser all over for our off road watering needs, who cares...

I remember reading somewhere (maybe on this site) that the air assist/hydro brakes were speced for their submerge-ability compared to the 1950's state of the art air brakes. Don't believe everything you see or read on the Web!!

I'd love to get a set, but the freight to NH will kill the deal!!

I'm not sure about the deuce, but the 5 ton gasser has hard valve seats and valves so you don't have to add lead subsititue to your gas. We just run ours on standard 87 gass with the timing bumped up a little for better grunt. Original MOGAS is something like 78-80 octane. The "new" gas is a...

Both Jeg's and Summit speed shops sell small oil filled gauges that have a back 1/8th inch connection and read up to 100 psi that could be mounted permently next to the electrical sender so you could check your dash gage at any time.

Our water truck tank is one of these cut down to about 16 feet (4,000 gallons). After driving it around the site the last few days, I can vouch for how heavy it is loaded!!! Mounted on the M139 chassis with single 1400x20 tires on the back it feels like your driving around on jello.

What type and size tires are on this beast? Don't look like Mil spec NDCC's.

Re your question about needing power to run the truck, the Cummins has an electric solenoid valve for the fuel shutoff. If not enough voltage, it would tend to close and shut off the fuel. Multis and the Macks don't have this, just the pull knob.

Try Sam Winer's for mirrors. On e-bay all the time under rzetzer. Around $22-25 each w/ head. Plus shipping of course. Good looking big truck!!

Special at the local HD truck supplier (but China made) @ $13.00!!

1100x20 NDCC (43" OD or so) would be cheap (and fit the original wheels), but any tire @ about 44-45" OD or less will fit without hitting on the rear. How much do you want to spend is the only question.

I know DDoyle is an expert on the deuce trucks and can pinpoint a year fairly close, but how about the 5 tons? Our new M52A1 and the M812A1 both don't have any year of manufacture on the data plates and the axle plates on the tractor are blank (haven't looked at the M812 yet). I am guessing...

Oil flows from the outside to the middle of the elements, so a check valve in the tube would be bad. If the casting where the oil flows from the block to the filter housing was shaped right, a ball check could be installed at the 90 degree turn with a light spring so the filters would stay...

Only driven the tractor around the yard (big yard). Transfer case does have an issue and will not stay in high unless you hold it, so most driving is in low. Of course there is a huge difference in weight, the tractor is maybe 14-15,000# bare with everything I have taken off and the water...

Is there a specific TM for the Mack powered 5 tons? The -20 I have has info for the gasser, Mack and the multi but I am looking for specific manuals for just the Mack. I guess I could just use a normal truck manual, but there are some differences.

Our M139 chassis water truck has a 4,000 gallon tank and it carries it OK off-road. Would never try it on the highway especially with the old 1400x20 tires.

I picked up an M52A1 on ebay in April. See posts in the 5 ton section. The engine is an ENDT-673 Mack, with different (military) oil and fuel filters on it compared to "normal" ENDT's. As I understand it, the Macks were installed in the 5 tons starting in the early to mid 60's and used until...

With the "77" in the contract number, do you guys think that this truck is at least a 1977 or newer? Any real way to tell the age on 5 tons?