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My M816 got 3.5 mpg with the NHC 250 but since rebuild it has a bunch more power and response so I'll have to check it again. Book claims 4.3 mpg but I think altitude has a big effect.

STP, STP, STP. Works. I took an engine apart that had 3,000 since oil change, mains were oiled as well as the rods, plenty enough for the cushion.

You might want to grease them all the way around. They rub on the sides as well as the bottom and top. Besides, it will keep them from rusting again. Lube the threads on the outrigger also, makes em turn real easy.

Gernade Shifter Drill it, insert pipe plug, cut it off, drill it, tap it, screw it on, done.

Two gaskets, one at the open end, rubber, and one on the bolt, copper. Both should be changed each time you change a filter. Neither gasket comes with a filter, you must order them sep.(at least at NAPA)

Here is a NH250 with Cummins Grey and high temp stove paint on the exhaust.

Me "Two, A and B

M 816 hydraulic motor Here are a couple of pictures that show the seals and internals of the wrecker boom motor. They are all the same so you will have an idea of what you'll find.

I put just a fine smear of aviation permatex on the spacers and it works great to seal the case.

When older gotta dance slower, once yer in the gondola soldier B" does the work. (Where is that @#$%@#)

The motors and pumps are real easy to work on and the seals are O'rings. They are covered in the M543A2 manuals. Seems they left out all the hydraulic repair info when they build the 800 series. The manual covers a lot of stuff we need on the 816. TM9-2320-211-35 page 462 shows a complete...

Thank you sir,

Lots of TLC on that one. Remember they are aluminum and , no matter what anybody says, they are a kick in the butt to drive and work on.

I wonder, what's the compression ratio of pine pistons?

You bet, glad it helped.

Here's a website that explains why........................... http://www.novak-adapt.com/knowledge/t90_rebuild.htm

Thanks Andy!!!!!!!!

That's the hose bib tool.

Beautiful Guard Dog!!!!

Thanks Will, I took it to Rocky Mountain Cummins and they couldn't see it. There is a ding in the edge but it doesn't look factory. There are also some marks like " ( " on both ends in the same area.