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True RMS voltmeter? The output of the SCRs is anything but a smooth sine wave, this could play havoc with cheaper digital voltmeters. The stock battery and charging meter is pretty immune to non sine wave output, it will read true RMS.

Have you downloaded the -10 technical manual? And understood operation of the 4wd mechanism? First, engage the hubs. Twist dial with indicators for locked and unlocked. Next, shifting from 2wd to 4 high range is done off road or slippery conditions, moving straight forward at low speed, coasting...

I doubt the batteries are good, the charging circuit is fairly low current capacity, to get 31 volts takes a heck of a current which would boil the electrolyte in the batteries. Perhaps this is without batteries connected? As in jump starting then disconnecting the cables? The battery...

I have not taken one apart but most starters have sprag clutch on the pinion drive which allows engine overrunning. Only the starter engagement mechanism pulls the pinion out of mesh with the ring gear.

The generator also has to run the loads of cooling fans, alternator for charging system, coolant pump and the like. This is why the 002/003 engines have much greater power output than their respective 5 and 10 kW electrical outputs. If I recall correctly, that is 16 and 28 Hp.

Another vote for an incorrectly rebuilt starter solenoid. Probably too much travel on the solenoid drive, causing the solenoid to go over center. i had the same issue on the starter in my M1031 CUCV because it was missing the pinion stop assembly. It finally broke the nose cone. Look in...

The voltage at low output load can vary. Once a good load is placed on it, this is no longer an issue. Field flashing is covered in that manual, they left out the safe way using a universal motor like a hand drill. Just plug it in, turn it on and then twist the chuck.

The fuel cutoff solenoid leads could cause a problem is shorted to ground, this would cause the DC circuit breaker to open. A dead gauge could be the gauge itself or something else. All safety mechanisms are bypassed without the solenoid present, the spring return in this component stops the...

There is no electronic voltage regulator on this generator, nor is it easy to add one. It uses magnetic amplification control, not electronics. So it is a reliable generator but not a tightly regulated output especially at low loads.

Guess I will have to take pictures of my motley load out. The one thing I have organized is my POL cabinet, the right upper rear. It also stores spare parts like oil filters and the like. The generator control panel cabinet is where I store my welder, a Miller Dynasty 200DX, a perfect...

The 1031 SECM generator is a Marathon Lima MAC that is a 4 pole rotor so it turns at 1800 RPM to generate 60 Hz of power. this is a two bearing unit as it is driven by a cog .

That huge vise on the tailgate of my SECM was just the thing to do a universal joint swap in the boy's 1009. He even provided the muscle, all I did was show him how. he noticed noise when driving, it was not hard to find the bad one, it had run dry of grease and needle bearings were ground...

Mine is Aussie made. The crazy Irishman who peddles auto parts has them for less than ChiCom Dorman.

Pressure cap? Remember, there are three seals, the outer one for catching expansion to tank, the main pressure seal and then the inner return from expansion tank. The latter gives the most problems in my experience with other cars. The outer seal is at fault if the expansion tank doesn't fill...

Part of the noise issue is the un muffled intake. Without a throttle plate to restrict flow, Diesel engines have a good bit of intake noise. The manifold is tuned for 3000 rpm so as you go past 55 mph in the one ton, it really starts making noise. But the engine isn't going to destruct unless...

Radiator is filled to the top when cold. When the engine is warm, the coolant will expand, draining into the recovery tank. When the engine cools, the coolant in the recovery tank is sucked back into the radiator. This constant purging keeps the coolant free of oxygen, preventing corrosion and...

I've noticed these trucks are hard to turn when in reverse or more accurately, they seem to struggle to back up when turning. Lots of slip in the torque converter. This only happens on hard surfaces with good traction, off road isn't an issue

Depends on how much back pressure the winch motor can take or if it can take any back pressure on the return to tank port. Well, assuming the hydraulics are plumbed that way. If parallel, then the motor can easily take all the flow, robbing the power steering of its flow. In a serial circuit...

Ancient dinosaur for sure. That predates the MEP standardization so that is why parts and a manual are hard to come by. Every branch was having their own made, making for a touchy logistic situation. Any pictures of the fuel pump close up?

I've done 70 MPH in my 1031 SECM. But I had swapped the harmonic damper with a brand new one. If 3600 rpm is bad for the engine, they should have made the redline 3400 or whatever is safe. The only thing 3600 RPM does is tests the cooling system. Indirect injected engines dump lots of heat...