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Building a start pre-lube system

acme66

New member
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Location
Plains, Montana
It has always bothered me how much my motor rattled until pressure came up. I also start the thing a dozen times a day or more and I have felt that has to be hard on it. One shop I consulted with about my string of blown motors also thought those could be related to how often I start it, they wanted me to let it idle all day. Well I can't and someplace on here I read another account that swore idling the nhc250 all day is very hard on it. So in a world of contradictory experts I went with the one thing I know for certain, oil = good, no oil = bad.

I pull from the bottom of the suction line fitting, run it though 300psi transmission hose to a pump mounted up where the old ether start used to sit. From there I pump it down to close to the truck's oil filter where I have mounted a Fram P8A car oil filter. I then pump that filtered oil in front of the motor to the oil cooler test port where I have mounted a 400 PSI one way check valve. Once the engine develops pressure that slams closed and prevents back flow.The pump is triggered using the old ether start switch in the dash. I don't mention it in the video but I am not driving the pump directly through the switch. I am switching a relay. I am using the 24v ether solenoid feed power and using that to switch a relay. Relay should draw less so I imagine it will be fine. Very inelegantly I have tapped power from the starter motor terminals using an inline fuse. After the system has proved itself I will transfer those feeds to the auxiliary fusebox under the passenger seat for a cleaner look.

Disclaimer: You undertake any project like this at your own risk. Lots of opportunity for failure here. I will update my video if anything changes long term.

Parts List:
Filter Housing: https://www.amazon.com/gp/product/B...f=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1High Temp/Pressure Trans Hose:
https://www.amazon.com/gp/product/B004XONNTY/ref=oh_aui_detailpage_o08_s01?ie=UTF8&psc=1Check
Valve:
https://www.amazon.com/gp/product/B..._aui_detailpage_o05_s00?ie=UTF8&psc=1Fittings
Reducer (1):
https://www.amazon.com/gp/product/B000BO6OLY/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1Fittings
Nipples (2):
https://www.amazon.com/gp/product/B003CEQROO/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1Fittings
Reducers (2)
https://www.amazon.com/gp/product/B01F3OD8GA/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Video of how I did it.

https://www.youtube.com/watch?v=Dysta8Tg4qg
 
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