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Funny how I have pulled all three off, not remembering it is the top center grill boltaua. But I am getting better, yesterday I worked on an H7 classified 002A and only pulled the top bolt. Yes, it ran, after minor fuel leaks and putting enough fuel in the tank. It takes more than 1 gallon...

Check pushrods. All diesels are interference and if the camshaft broke near the drive gear, chances are one or more valves were open causing piston to valve contact. Being a flat head OHV with flat-top pistons, the valves should be fine, the pushrods take the abuse.

I'm almost certain the o-rings are standard parts. Viton is the material of choice here. A $25 dial/digital caliper and a visit to McMaster-Carr will get you what you need in 3 days. Stan, the great part about these generators is the ease of removal of the injection pump. Even easier if...

I'm certain Cummins has completely divested itself in legacy Onan engines. Ambac has continued to provide parts although the end is near as these engines don't meet emissions requirements. Very low PM but high in NOx.

You have the timing procedure understood perfectly. Just go by the flywheel marks, using a mirror and flashlight to see if the notch in the face gear is aligned. For parts, it would be best to contact a distributor or a local diesel injection service. There may be other items in need or...

If you have tapped on the plunger, it is unlikely that just diesel varnish is the problem. So you need to pull the pump. The plunger turns at half engine speed (1:1 off camshaft) while it strokes to inject fuel. The mechanism which provides for this is probably what has failed...

You should be able to detect the plunger moving while slowly turning the engine over with the delivery valve out. Be sure to lube the pump with clean diesel. The stroke is small, less than 3/16". If the plunger isn't stuck, it will be resting on the camshaft. I cannot imagine deposits would...

:beer:. I don't like the idea of using a punch on the plunger because it only takes a tiny bit of dirt to ruin these parts. Take the delivery valve out and hit it with Berryman B12 Chemtool to dissolve the gunk first. Then if the plunger is still stuck, you can try the plunger tap. I...

Stan, The control lever will not move the piston. The piston is moved by the cam in the engine. This is what pressurizes the fuel. The control collar slides on the piston and controls the volume of the fuel injected by each stroke. It must move freely. The piston also turns to distribute...

Another common cause of no fuel is a stuck IP piston. There is a spring which causes the piston to move towards the cam shaft. If the throttle on the IP is hard to move or stuck, the piston could also be gummed up. See the FAQ on how to resolve this, it is best to use solvent over brute force.

Very easy to pull the delivery valve, just remove the big cap nut on the center of the IP, then remove the 12 point nut under that cap. Clean it out and reinstall. No need to pull the pump.

The frequency meter transducer has aging capacitors. Probably not repairable as most are solid potted. Either get a replacement or retrofit a digital. The meters must be made of gold as OES wants $109 for them. The transducer can be removed and tested on house current, should output 100...