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Restoration & Repair Tips Board

Oil in fuel, help with seal installation.

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Neal Yoest

10-10-2006 00:54:17




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I"ve recently replaced the injection pump on my 4320 and now I have diesel in my oil. I suspect the "cup" seals have rolled as I slid the injection pump onto the drive shaft allowing the fuel to bypass. What is a good way of installing/getting the pump over these buggers?




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msb

10-10-2006 20:54:22




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 Re: Oil in fuel, help with seal installation. in reply to Neal Yoest, 10-10-2006 00:54:17  
The secret is to use lots of grease. Yes, the special seal tool helps, but it is not a sure fire way to install the seals.I have had a few get turned even when using the tool.Lots of grease and slowly wobble the pump as you squeeze the seal with your thumb and finger while sliding the pump on to the shaft.In fact, I now prefer to leave the seal tool in my toolbox and just use my fingers.

Be sure to have the throttle lever wired in the wide open position until you are sure the pump head has engaged the tang on the shaft,making sure the dot on the shaft is lined up with the dot inside the pump head.

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the tractor vet

10-10-2006 18:26:35




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 Re: Oil in fuel, help with seal installation. in reply to Neal Yoest, 10-10-2006 00:54:17  
Yep , ya done went and rolled the one cup seal that seals the pump from the oil . Now IF YOU ARE A REAL lucky person ya may get away with just pullen the pump back off and take a real good look at the seal if it is not cut the ya may just swap them around and lube them up and with a dental pick start the pump back down on the shaft and use the 90Degree end and help the seal in and go down real easy and stright . Now there is a special tool that colapes the seal till it is started in the housing that ya can pick up from any diesel injection place , now they may have order it for ya . I threw mine away along time ago and use the dental pick.

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