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IP parts recognition training Schooling time..... Let's make sure we aren't confusing "Tappet" and "Timing Button". It wasn't completly clear to me until I rebuilt my pump. The red arrow points to the plunger guide. Sometimes called an "Oldham Drive". That is what most likely broke in your...

While there are a lot of similarities between the Civy Onan and the MEP-Onan, There are some very significant differences. The TM's are very thorough and (mostly) correct. I suggest using the TM methods over the ambac and civy Onan manuals. I have 'em all, but use the TM mostly. There is a...

Make sure you -> "Set throttle lever on injection pump to wide open or up position (compress stop solenoid plunger spring or remove stop solenoid assembly)." That is really important. Also important: "The point at which fuel stops flowing from Number 1 cylinder fuel delivery line is the...

I searched the -12 and -34 manuals. I couldn't find "one lobe is pointed out and 45 degrees down." Where does it say that? Some other manual???:confused: Did you use the 1/8" rod in the timing hole and verify that cylinder one's rocker arms are loose? (See page 7-38 of the -34 manual) You can...

For Valve cover gasket: Try 115-0130 115-0130 MDJB/MDJE/JB/DJB DJC Rocker Arm Cover Gasket [115-0130] - $7.00 : Onanparts.com, Your Onan Parts Solution or Sears Parts Direct...

Correct but not on the sqaure cam / eccentric. It is from the smooth area beside the IP Drive Gear. See the attached figure from the manual. The 1.171" dimension is the critical dimension. Use the correct amount of shim material so the depth gauge reading is 1.171 inches. Remove the valve...

There are shims that should be on the block between the IP and block. They should stay with the block. The manual (TM 5-6115-584-34) says the thickness of the shim or shims is stamped on the block. Paragraph 7-18 a. (3) provides guidance. Just another thing to look for / at. Links to the...