MasseySuper90
Member
I am working on a TD9. The Injector pump plunger is stuck at the bottom of its stroke. Is it possible to get at it while the pump is still on the crawler?
- Thread starter MasseySuper90
- Start date
It been around 45 years now, but we had a old cat engine , that the rack on the injection pump was stuck . We poured Essentiolube- a product that is still sold by Hydrotex lube based in Dallas---in the fuel --let it sit for 4 months . Went to start it and she purred like it was never used. Amazing product . You can find Hydrotex lubes on line. Hope this will help you to.
Janicholson
Well-known Member
I had success freeing mine in a MD. Some solvent (carb cleaner) and some time and some very gentle prying on the rack and it came loose. Jim
MasseySuper90
Member
Thanks for the quick replies. I now have a little hope of freeing without having to disassemble the pump.
jim warehime
Member
Remove the lines needed to remove the top cover off pump, inhector lines and a couple fuel lines, 3/4" banjo bolt on rear of cover with 2 copper washers, oil fill acorn nut and pressure gauge. Once cover is removed there is a small steel line and 4 7/16" bolts that need to be removed and plunger will slide up and out, soak for a day or 2 till gear moves freely then reinstall in reverse order. Make sure gear and rack mesh properly at double tooth. All can be done while still on engine. Have done it on a td6 and md.
Al Baker(pumpman)
Member
I work on half a dozen or so I-H cast iron pumps each year. I have never found one that cant be freed up, but it does take patience. I use wd 40 or pb blaster. I lube everything and start to move the rack rear little by little . Then tap the plunger down ever so slight. then tap lightly on the body to try to get the spring to return it. Sometimes I heat them to 250-300 degrees with a propane torch and heat gun. 1/2 hour to 45 minutes will free most of them up. Go slow , NEVER force them or go to far. Little at a time, use kid gloves. Good luck Al
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