Search results

Big job any way you do it.

My next phase will be to insulate the inside of the doors, behind the dashboard, and the inside firewall with foam and heavy rubber. This probably won't be until the end of summer though. It's funny, the tractor is faded 383 green and the painted skeleton is 383 also. In real life, the colors...

This was one of the hardest and most miserable jobs I've ever done. It takes hours to fit the insulation and get it in straight and not crumbled. It took two full days. I didn't take sound readings, so I'm going by ear, which can be deceiving sometimes. The end result was that the truck was...

I want to make my M915A1 as quiet as possible. I plan on doing this by adding sound deadening in stages. The first stage was the floor section of the cab. I used regular household 6" thick fiberglass insulation against the floorboards and then covered it with a 1/2" thick aluminum foil...

I figured it would be easy to add, but you need the trailer valve first. You would cut into the service brake line and splice in the TPV, then connect the control port of the TPV to the emergency line downstream of the trailer valve. If there was a break in the emergency line, the trailer...

By the way, the valve and trailer brakes work great and it's MUCH more user friendly than the stock set-up. I realize that you were asking about tractor parking brakes, but it sounded like you were concerned about the trailer too so I added my 2 cents. I don't know for sure, but it seems to me...

Yes, the wheelbases of the M818 and M915A1 are both the same at 167" so the M920 should be worse.

I added a trailer supply valve to my M818. Sold it before I added a tractor protection valve though. After you have the trailer supply valve, the protection valve is very easy to add. See my writeup in...

I could never seem to find accurate turning radius data on trucks. The turning RADIUS listed varied and sometimes the distance listed was actually a diameter. I wanted to compare my M915A1 & M818 so I took each one and turned a full 180 degrees and measured from outside to outside(i.e, real...

Doesn't look like the tractors are Western. Look at the front fenders on the convoy tractors-the top of the fenders are much higher than the wheel cutout. The pic of the Western shows the top of the front fenders following the contour of the tires and very thin similar to a commercial over the...

An even easier way to do it is to unscrew the vent fitting for the fuel tank vent lines that is mounted high up on the firewall on the passenger side. Stick an air nozzle into the vent hole and pressurize with low pressure(5 PSI). The vent lines are so small that it takes 10 seconds at least...

I used to be a design engineer for Fabco Div of Kelsey-Hayes. We manufactured heavy duty all wheel drive off road trucks. One of my projects was to improve the cooling systems and I headed down the same road with the Flex fan. BAD MOVE! What you forget is that flex fans work great on cars...

Exactly. The M818 is too underpowered to pull my halftrack but it looks so "right". The M915A1 is much more civilized with plenty of power, but it just doesn't have the 'look'. Too plain Jane-more like a regular over-the-road truck painted green. Living here in California with the hills, I had...

Correct. Butterfly valves are installed in the intake manifolds and are usually controlled with pneumatic rams. There is usually a very complex control box that meters air flow and controls propane flow(usually by altering propane manifold pressure). About 10% pilot diesel injection is used to...

The reason gasoline engines are converted to propane and not diesel engines is that the air/fuel ratio must be correct. Gasoline engines meter both air and fuel where a diesel engine meters only fuel. You can't just dump propane into a diesel engine because there is no way to meter the air...

Thanks. I used to design transfer cases for Fabco div of Kelsey-Hayes.

If the slider at the top is in high gear, the 22 tooth gear acts as an idler so the "high" rear shaft ratio is 1:1(33T/33T) and the "high" front shaft is 33T/22T x 21T/34T=.9265 underdrive or 1.079 gear ratio(1/.9265). In "low" the rear shaft is 25T/33T x 22T/33T=.5051 underdrive or 1.98 gear...

One more I forgot.

We have a lot of bolts custom made for us by ARP. You generally need to make at least a couple thousand to get the price to a reasonable point.

Thanks. No idea on load capacity, but most backhoes are carried on 10 ton trailers minimum so I would guess the capacity is 10 tons. My track weighs 15,000# and the ramp doesn't budge. I forgot to put the supprt legs down one time and during unloading the trailer bounced up and down like an...