The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > Diesel Conversions

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-16-2015, 12:29 PM   #1
brimc
Registered User
 
brimc's Avatar
 
Join Date: Jun 2013
Location: New Lowell, Ontario, Canada
Posts: 248
12 Valve fuel shut off

So I'm working out the details of replacing the electric fuel shut off solenoid on my p pump 12 valve that I'm doing in my 86 Silverado. I want to be rid of electrics, electronics, wiring and automotive computer nonsense as much as possible on this build. So I want to install a simple push/pull cable to manually open and close the shutoff valve. I have searched and seen a few different types and styles and think I have a plan other than I have two questions that I am not sure about and I thought maybe some of you would share your thoughts.
First, when the engine is off, not running, does it matter what position the shutoff valve/lever is in? Second, does the cable have to be "locked" or maybe spring loaded to hold either the on or off positions?
__________________
BRIAN

1986 Chevrolet K20 Silverado 12 Valve CUMMINS P Pumped Intercooled/Getrag360/Divorced NP205/10B/14BFF Detroit Locker - DD Canadian Winter Beater.

My Chevrolet CUMMINS Build http://67-72chevytrucks.com/vboard/s...d.php?t=585509
brimc is offline   Reply With Quote
Old 08-18-2015, 12:00 PM   #2
burnin oil
Registered User
 
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,919
Re: 12 Valve fuel shut off

A good quality, not cheap, choke cable will work just fine. That is how tractors worked for years. Depending on the way the cable is oriented will depend which way the handle is when the fuel is shut off. You want it in when driving or it will drive you nuts. If you use a cheap cable from the auto parts store you will be popping the hood because the injection pumps arm has just enough resistence to kink the cheap cable. Been there and done that on my 95 dodge when the solenoid died. As for the arm on the pump, yes it does matter which way it swings. One way is on and the other is off. I want to say lever forward on a PPump is full fuel.
burnin oil is offline   Reply With Quote
Old 08-20-2015, 04:58 PM   #3
Dieselwrencher
6>8 Plugless........
 
Dieselwrencher's Avatar
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,112
Re: 12 Valve fuel shut off

On a P-pump you have to pull the lever up for on and push it down for off. If you remove the bracket from the lever, fuel off is back towards the rear of the engine. Fuel on is forward toward the front of the engine. Fuel shut off cables drive me nuts. They usually always rattle over time. But, they are simple and work.

That is off in the pic for reference.
Attached Images
 
__________________
Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
Dieselwrencher is offline   Reply With Quote
Old 09-06-2015, 01:10 PM   #4
brimc
Registered User
 
brimc's Avatar
 
Join Date: Jun 2013
Location: New Lowell, Ontario, Canada
Posts: 248
Re: 12 Valve fuel shut off

Thanks for the replys. I understand the function of the lever and how it closes off the fuel by pulling back the rack etc. If the rack is back in the idle/run position while the engine is not running is there any negative affects? Thinking about spring loaded to hold the on position. When you pull out the cable handle to shut down the engine the spring would pull and hold the run position 100%. Is this dangerous?
__________________
BRIAN

1986 Chevrolet K20 Silverado 12 Valve CUMMINS P Pumped Intercooled/Getrag360/Divorced NP205/10B/14BFF Detroit Locker - DD Canadian Winter Beater.

My Chevrolet CUMMINS Build http://67-72chevytrucks.com/vboard/s...d.php?t=585509
brimc is offline   Reply With Quote
Old 09-07-2015, 09:27 PM   #5
6BT 56
Registered User
 
6BT 56's Avatar
 
Join Date: Dec 2012
Location: Coldwater On. Canada
Posts: 551
Re: 12 Valve fuel shut off

There is a guy on the napco forum that spent years if his life all bent up cuz his suburban started up and dragged him down the road when he accidently knocked the starter sol while doing some work under the truck . Cuz your truck is manual I'd say its risky . Granted he left his ign on accidentally but the manual shut off could end up,in a similar situation .

Just my two cents .
__________________
56 gmc 4X4 Cummins 5 spd 60F 70R
2005 Ram 3500 DRW cummins 4X4.
2006 Conolift 9/15. 2011 F 350 winter beater
New 2018 ram 3500 drw 4x4. Makes my 2005 Look as if it's been running on 4 cyl since new !
My Build http://67-72chevytrucks.com/vboard/s...d.php?t=556908
6BT 56 is offline   Reply With Quote
Old 09-08-2015, 07:42 AM   #6
burnin oil
Registered User
 
Join Date: Jan 2013
Location: Eastern TN
Posts: 1,919
Re: 12 Valve fuel shut off

Just put a regular cable in it and leave it pulled out until you go to start the motor. That's all I do in my Mack. Pull the kill switch for the fuel and lock both transmissions in 1st. Truck stays put, even with pre spring brake air chambers on the truck. There is no reason to make things more difficult than it needs to be. If you want to think about failures it is possible for the contacts to weld themselves on a relay and keep the truck from shutting down. Just saying.
burnin oil is offline   Reply With Quote
Old 09-08-2015, 08:35 AM   #7
brimc
Registered User
 
brimc's Avatar
 
Join Date: Jun 2013
Location: New Lowell, Ontario, Canada
Posts: 248
Re: 12 Valve fuel shut off

Agreed with all the comments. Trying to decide on the cable I'm going to buy. Going to pass on a regular cable. Thinking of a full heavy duty push/pull locking. There are bit pricey but still much cheaper than a new solenoid setup. Thx guys.
__________________
BRIAN

1986 Chevrolet K20 Silverado 12 Valve CUMMINS P Pumped Intercooled/Getrag360/Divorced NP205/10B/14BFF Detroit Locker - DD Canadian Winter Beater.

My Chevrolet CUMMINS Build http://67-72chevytrucks.com/vboard/s...d.php?t=585509
brimc is offline   Reply With Quote
Old 01-02-2016, 02:52 PM   #8
brimc
Registered User
 
brimc's Avatar
 
Join Date: Jun 2013
Location: New Lowell, Ontario, Canada
Posts: 248
Re: 12 Valve p7100 cable fuel shut off

Got this part of my build completed so I thought I would update this. Hopefully this will help out others looking to not use the electrics to run the fuel shutoff.
I got a $30 10 foot PTO cable from Princess Auto. It is pretty heavy duty. Meant for heavy use. I think it should hold up good.
Picked a spot in the dash just below the headlight switch. Easy to reach from the driver seat or from standing on the ground with the door open. Handy if you ever need to shut it down without needing to jump up in the cab.
"Run" position.



Ran a hole-saw through the firewall just below the fuse box assey. Found a rubber grommet in the spare parts drawer. Also added some sealer to seal it up good. Should stay dry.




Removed all the old brackets and cut up a small bracket and bolt holder for the new cable. It locates off one of the old bracket bolts bottom rear side of the AFC housing. Just had to clearance the throttle lever slightly to clear.
Shutdown arm in the "run" position.






Arm in the "shutdown" position.




"Off" position.



There is very little effort needed to move the lever and the hold in both positions is very good. I have cycled it 10 or 12 times and it seems to work very good. Time will tell but I think it will work out good for me.

I have learned alot from reading these great forums on this great website and hopefully this will help out others on there future engine swaps.
__________________
BRIAN

1986 Chevrolet K20 Silverado 12 Valve CUMMINS P Pumped Intercooled/Getrag360/Divorced NP205/10B/14BFF Detroit Locker - DD Canadian Winter Beater.

My Chevrolet CUMMINS Build http://67-72chevytrucks.com/vboard/s...d.php?t=585509
brimc is offline   Reply With Quote
Old 01-08-2016, 02:00 PM   #9
Luther Grimace
Registered User
 
Luther Grimace's Avatar
 
Join Date: Jun 2012
Location: Madison, AL
Posts: 380
Re: 12 Valve fuel shut off

Quote:
Originally Posted by 6BT 56 View Post
There is a guy on the napco forum that spent years if his life all bent up cuz his suburban started up and dragged him down the road when he accidently knocked the starter sol while doing some work under the truck . Cuz your truck is manual I'd say its risky . Granted he left his ign on accidentally but the manual shut off could end up,in a similar situation .

Just my two cents .
Never thought about this before. Makes me want to reinstall the solenoid in my truck. I currently operate the fuel shut off of the throttle cable in the dash board. I always leave it pulled out (OFF for a VE pump) when I'm not driving it but there is a risk involved. My Cummins will crank in what seems like a millisecond. I will start putting both sticks in neutral when I work on it.
__________________
1955.2 Chevy 3100, 6bt, Getrag G360 5-speed, NP205, Dana 60/70 - http://67-72chevytrucks.com/vboard/s...d.php?t=536540
1992 Chevy K1500 Silverado ECSB
1965 "Crewcab" Chevelle 300 Deluxe - soon to be LBZ Duramax/4L85E powered
Luther Grimace is offline   Reply With Quote
Old 01-09-2016, 09:54 AM   #10
brimc
Registered User
 
brimc's Avatar
 
Join Date: Jun 2013
Location: New Lowell, Ontario, Canada
Posts: 248
Re: 12 Valve fuel shut off

There is some risk, but for me the benefits outweigh them.
I have the starter engage circuit tied in with the park break and the clutch. ( both pedals down to crank )
When I "park" our bikes, quads, tractors usually leave them in neutral. Will likely do the same with the truck and just use the parking break.
__________________
BRIAN

1986 Chevrolet K20 Silverado 12 Valve CUMMINS P Pumped Intercooled/Getrag360/Divorced NP205/10B/14BFF Detroit Locker - DD Canadian Winter Beater.

My Chevrolet CUMMINS Build http://67-72chevytrucks.com/vboard/s...d.php?t=585509
brimc is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:09 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com