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There are two lines on the power steering pump, pressure and return. You are correct about the reinforced line being the pressure line. For bleeding the return line to the pump is low pressure and usually just uses a lite duty clamp.

The symptom described is classic air in the system and will need to be purged. What happen is “bubbles” in fluid doesn’t provide enough pressure to operate the varies components. The truck should have had 10w oil in it when it left service, that’s what the book calls for. That doesn’t mean...

First a couple of questions. Is the truck new to you? How many miles have you driven it without trouble? Have you worked on the power steering system lately? Does if have any power steering fluid leaks? The best way to bleed the power steering system is to lift the front axle up enough so...

It is already on my calendar.

I have never found the M939 series that loud in the cab, however the M39 and 800 series are a different matter. I have several pairs of Peltor Tactical 7 ear muffs. They get used when driving noisy trucks and whenever I’m around loud noises. They work well when running impact guns during tire...

The TA/312 uses a couple of size D batteries, so it has a practical range of over ten miles. The TA/1 uses sound power to work and will work up to about three miles, even if the book says more. The TA/312 will ring the TA/1 and visa versa. To get the best use, having good wire, that is dry...

When these vehicles were first made there was 80/90 gear oil. As the oil was improved with additives, they started adding GL numbers. I think the current number is GL5. So, the first oil became GL1. Certain additives in some GL5 formulations harm yellow metals. Now there are GL5 oils out there...

Unless you plan on driving the vehicle in temperatures -15 degrees and lower the lube order for the transmission, transfer case and differentials call for 80/90. The transmission calls for 80/90 GL1 oil, the newer stuff last time I looked, is 80/90 GL5. It has to do with the additive...

The M750 trailer and the M447 trailers are M295 semi-trailer chassis with different boxes mounted. It is too cold and dark outside to take pictures of either my M750 or M447 trailers. However, I did find this picture of a data plate online.

The sprague could have been damaged from coasting backward when in a forward gear. The sprague may also be “gummed’ up. The inside of the transfer case and gears can develop a film of old oil. This film can cause the sprague to act erratic. Drain the old oil out. Fill the transfer case with ATF...

Blivets came in handy for us. We would secure one is a 105 when we went out on ops. Unlike the Beta tanks they would deflate as the fuel was taken out. Even with baffles the Beta fuel tanks would get squirrelly when half filled. Park the trailer a little higher than the vehicle to be fueled and...

There was a bulletin some years ago about flushing out a contaminated system and acetone was what was called for. As for using compressed air. It doesn’t take much pressure, just a couple of psi. An oversized rubber stopper with a blow gun works for the master cylinder. That just means it will...

I’m pretty sure that the fifth wheel on the M52 was made by Holland. They may not be marked as such, however it is a Holland design. The same fifth wheel was also used on the 800 series tractors and on the M197 and M198 dollies.

With the right tools it isn’t that bad a problem if there are no seal issues. The first question is what brake fluid you wish to have in it. If it were my vehicle, I would put DOT 5 fluid. What is needed is an adapter for the master cylinder(s) to pressurize the system with air. Acetone for...

To run air tools or to air up tires use the rear emergency line. The rear service line only gets air when the brakes are applied. The front emergency line is only for supplying the vehicle with air from another source and will not work to supply air for tool use. The front emergency air line...

The front glad hands are for when the vehicle is towed. Air lines are connected to the towing vehicle, the emergency line charges the system, the service line will operate the brakes. Only the front emergency line has a shut off valve. The service glad hand doesn’t have a shut off valve and if...

If the added paint comes off with acetone, MEK should do a number on it. Place a rag on the paint, wet it with MEK, allow to soak for a short period. The paint will be lifted into the rag. That will get most of it. The cheap red shop rags from Sam’s Club work well. They get trashed after use...

Most of the ones I have that are painted with CARC have (CARC year) stenciled in black somewhere on the dash.

Most military vehicles starting with the CUCV’s came painted with CARC. All vehicles painted with CARC are supposed to be marked with CARC and the date when painted in service. I’m sure there are some with out the markings, just as some of the CARC painted vehicles were painted over with enamel.

As you have already read CARC is a pretty durable coating. In fact, one of the ways to check to see if one has the older enamel paint or CARC is to rub the paint with acetone. With that said, there are two things that come to mind. DOT 3 brake fluid dissolves paint but doesn’t hurt CARC...