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Hello Greg, Did you ever find those service and parts manuals for the 1980 G40-H aircraft tug? I'm gettng ready to start the mechanical restoration, and sure could use them. Looking forward to hearing back from you. Thanks John

It is the MB4 4x4 4 wheel steering.

I just picked up an Air Force 1980 Coleman G40-H aircraft tug with the 4 cly. Allis Chalmers turbocharged engine. Any information like service and parts manuals would be very much appreciated.

I found a mechanic familiar with the old 6.2 GM diesels. He stopped by and found the problem in under 30 seconds. It was a cracked vacuum and cracked plastic fitting right by the injection pump. No it runs as it should, perfect. I want to thank everyone who had replied with advice.

Yes, non turbo charged. Original injection pump pulled and sent to Oregon Fuel Injection Service then reinstalled so no mistaking it for the wrong IP. I replaced the injectors because I had 200+ new in the wrapper OEM Delphi injectors from a good buy. I sold these same injectors here on Steel...

Black smoke coming out of both l/r exhaust pipes. Perfectly clean air filter. Elevation 3300 above sea level.

I have a 1986 M1031 shop maintenance truck. The timing is set perfect with brand new OEM injectors and it seems to be running OK but its running rich and smoking. Has anyone else encountered this similar problem and found the remedy? I'd appreciate any good advice from some experienced and...

What happened to this thread. Any word on the lock out hubs gentlemen??? Please advise.