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Ok, it is something like 20 degrees outside & my two M931's are giving me ****. I cranked both trucks over & got fairly heavy white smoke out of the exhaust stack. The fuel is burning just not lighting off. I hit truck #1 with ether & it fired right up. Idled rough for a bit but smoothed...

7 mpg? Wow, that's a lot better than mine. Your gearing configuration must be a lot more efficient.

Thank you, I will check those thing out & post what I find.

My 931 weighs 22,100 pounds, 3600 pounds heavier than your 818. The gearing is probably better with the 5 speed. What RPM are you turning at 50? You have 6.44 ratio axles & I have 6.14 ratio if I remember correctly. If the transmission gearing isn't dissimilar then theoretically your lighter...

We were getting right a 4 mpg but the book said 3-4 mpg so I expected it. We ran 55-60 mph all the way turning 2000-2100 cruising & 2150 just before a hill so she wouldn't bog. Hit the hill at 2150 & she'll hold 2100 at the top. Hit that same hill at 2000 & you'll be turning 1500 at the top...

Does anybody anywhere have a dyno chart for a stock NHC-250 Cummins? By dyno chart I mean horsepower/torque versus RPM chart. One that showed volumetric efficiency % versus RPM too would be awesome. Thanks!

The petcock type fitting is for bleeding air out of the system after refilling it. At Fort Riley we had a 5-ton that had everything hooked up but just refused to blow heat, just cold. We bled a bunch of air out of that fitting & she blew hot as you please. Truck had been in the field for a week...

Thanks to all, it was a fun hard adventure. Now to go start working off those gigs!

Got the trucks in my back yard! Drove down to TX on Friday, got there about 10pm. Got up the next morning & jumped on the trucks at 7am. Checked all the fluids & fired them both up. Did an abbreviated PMCS on both trucks & found the following: = Both truck's power steering pump return...

It should be an adventure for sure. Drove the trucks 90 miles out of RRAD when I picked them up & they ran great. One had dead batteries, the other had the coolant drained. Both had the air dryer outlet fittings conveniently broken off. Used the emergency trailer line to connect the air dryer...

2nd driver

About to go down to Texas & get my two M931's. Trip will be 648 miles, will post pictures!

When was the last time you were at RRAD? I have two 931's I got from there & they ran 90 miles in 105 deg. heat just fine. My trucks were sabotaged I think. The air dryer outlet fitting was busted off so zero air pressure. BOTH of my 931's had the exact same fitting broken in exactly the same...

I have been told both 3/8" & 1/2". Thank you for your input.

What size are they? The truck ain't here so I can't measure it. DOT plastic tubing but what size? What is the NPT thread size on the 90-deg outlet fitting on the bottom of the air dryer? This info is not written in any TM or website on this planet. Help a brother out. Thanks.

I FIGURED OUT WHAT I NEED: Reference: TM 9-2320-272-24-2 (PARAGRAPH 3-413) PAGE 3-1030 ITEM 9 (90-DEGREE ELBOW) **BROKEN** PAGE 3-1031 ITEM 9 (90-DEGREE ELBOW) **BROKEN, same part as above** ITEM 31 (AIR LINE + COMPRESSION FITTINGS) PAGE 3-1033 ITEM 9 (90-DEGREE ELBOW) These are the parts...

http://trucks5ton.tpub.com/TM-9-2320-272-24-2/TM-9-2320-272-24-20425.htm Items 9, 30, 31, 32

I filled the entire cooling system on one truck with the yard Joe handing me the jugs, LOL. Since he was standing there watching me like I was gonna steal something, I put him to work. Had him go scrounge me some slave cables too! He didn't seem to mind at all. That yard Joe was aces with me...

True, didn't think about that. They look to me to have come fresh out of 3rd shop overhaul: New O.D. green parts, zero mile tires all the way around, maintenance records intact & current up to the point of storage. The maintenance inspection sheets never mentioned broken air lines. When I...

I do not think it was done by the unit. With that air line broken you cannot unlock the air brakes, ie the truck is unmoveable even with a tow truck. There was NO WAY I was leaving those two trucks there on that lot. LOVE AT FIRST SIGHT mean anything? LOL I live in Kansas so I had zero...