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Yes, they left off the speedometer correction unit. The mechanic probably didn't know what it was for as most vehicles use electronic speedometers.

They aren't new, some have lived hard lives being driven by teens who didn't have to buy insurance or fuel. Many times, off road too. Sure, convoy miles are easy but unit maintenance may have been spotty. For instance, back in the early days, mechanics didn't have Torx bits which were needed...

Every transmission incurs loss in power, manual transmissions are far more efficient. Lost power is dissipated as heat, the torque converter is the greatest loss. A steady-state loss of 40 Hp is over 100,000 BTU/hour. Or put in fuel loss, that is about 3 gallons of diesel per hour wasted.

Yesterday's sweat session was fixing small stuff on the M1031 SECM. I replaced the screws holding the vise jaw faces, the holes were rusty so I ran a 1/4"x20 tap into the holes. I thought the 100 PSI cut-out on the compressor was a bit low so after verifying the gauge worked and the pressure...

I know a mouse or two holed up in my M1031 SECM. There is still a nest in the air compressor's drive belt cage. Under the seat was a bunch of shredded aluminum foil, in the ash tray was an empty package of stick chewing gum, the foil-wrapped stuff. Bunch of sunflower seed hulls too. I might...

Disconnect the batteries and remove. Cover alternators, injection pump, brake master cylinder and booster and all electrical stuff with aluminum foil (easier to manipulate than plastic wrap), then loosen the heavy stuff with paint thinner (not lacquer thinner, acetone or reducer but ordinary...

Ok, here is another inquiry; VIN: 1GBHD34J6GF427951 Registration: NG1MJ9 NSN: 2320011335368 Purchased at Fort McCoy Wisconsin DRMO/GL last month. Bumper number is 8?? OD, CTT III This is a M1031 CUCV with Shop Equipment Contact Maintenance box.

Ether is really bad for these engines. Yes, it could be the glow plugs. Easiest way to tell is to measure the resistance of each, bad plugs will have much higher to infinite resistance. Good plugs will have resistance in the 12-18 ohm range. Most indirect injected engines need glow plugs...

Ah, training a bearing packer. The first mechanic job my dad tasked me with. It builds forearm strength. Starting with deuce bearings, age 10 is about the absolute minimum.

And the vacuum pump connects to the throttle position sensor on the injection pump, the lower port. There is a rubber block, GM part number 22506637 which assures proper connection, it isn't needed. It only prevents incorrect assembly. The upper port on the injection pump's sensor connects to...

Remember what trailer the stock hitch is designed for, a 3/4 ton trailer. And it doesn't swivel.

You aren't the first to get incorrect parts. I purchased brake wheel cylinders from the local auto parts store, still sealed in the wrapper with the correct part number on the bag BUT the parts would not fit at all, wrong piston diameter and much larger. Just my luck, that store was all out of...

Did a little PMCS today on the M1031. Ran it up, checked the governor (still buggy, droop from 61 to 58 Hz with just the compressor0. Checked all fluids and lubricants, checked the universal joints for play, checked grease levels in joints. Once I get the governor running better, it will be...

I may be able to weld the cracked case if you have all the parts. Even if the bearing bore has to be machined out, it will save an alternator from the junk heap. Castings like this weld easily.

Hydraulic head issues. The bolt on the center of the hydraulic head gives you visual access to the plunger which should reciprocate 3 times for every revolution on the engine. Remove this bolt (after cleaning the area well) and with electric priming pump disconnected, have an assistant work...

Sticking plungers are best fixed by removing the pump itself. Timing is set by shims so don't worry, replacing the pump with all shims and same button means timing will be like original. With it apart, cleaning is far more effective. Remember, the plunger is match honed to the barrel so...

Every hydrocarbon burns in two steps, the first is hydrogen oxidation, making water vapor and the second is the oxidation of carbon yielding carbon dioxide. That first oxidation is the hotter of the two. If the engine is blowing smoke, there CAN be excessive exhaust gas temperature. Direct...

My agent called me as they could not find any record of the VIN on my M1031. I had to explain it had never been titled so it was like getting insurance on a new car, despite its 26 years of age. Anyone else have insurance woes before registration and titling?

I am glad it got fixed yesterday. Raining pretty good today. It sure was fun to drive it once fixed. That engine seems peppier than three years ago when I drove it from Beeville to Sinton.

Sir, Thanks for the response. In the next sentence I said you could snake a wrench through a U Joint, I should have clarified that I'd have the transfer in neutral and snake the wrench through the jack shaft. Nice to see you still on here Floridianson. Eventually, we paint a pretty detailed...