Fuel shutoff solenoid question

ohanahorse · 11-01-2009, 11:25 PM

Hi,
I pulled the afc this weekend and noticed that the bottom bolt that holds the fuel solenoid is MIA. Does anyone out there know what size that puppy is? Also, purchased allen bolts for the afc to be able to adjust-what's the torque specs for them and should i lock washer them? Seems I read that they vibrate loose...
thanks

__________________
97 3500 Xcab 5spd 4x4 Nearly Normal

JoshMock · 11-02-2009, 03:04 AM

for the sylenoid, just pull the screw you have and run to the parts store and get another one. as far as the afc bolts, if you talking about the four bolts on the top. just put them on and tighten them down, no torque spec or lock washers needed.

__________________
97 3500 ext cab dually - BHAF, AFC slid ff, 4" Exhaust

ohanahorse · 11-02-2009, 12:04 PM

the bottom bolt is missing so I don't know the size...I was hoping someone out there knew. I'm thinking 1/4 fine thread but don't know length....

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97 3500 Xcab 5spd 4x4 Nearly Normal

ohanahorse · 11-02-2009, 12:42 PM

I forgot to mention..the solenoid is not always pulling the plunger up completely. I have to manually pull it (seems to stick) which results in less than 100% power/pull (it becomes a dog on hills). Could this be due to the bolt, or something else (It's like the transfer pump in that you cannot see the assemble to evaluate). I will be pulling the solenoid tonight to clean, but that does not seem to be the issue as it slides up and down fine and rod is correctly adjusted, and the boot is not getting in the way.

__________________
97 3500 Xcab 5spd 4x4 Nearly Normal

***Baja*** · 11-02-2009, 04:08 PM

If cleaning does not solve the sticking, I am wondering if you are getting enough voltage to pull the plunger up.

__________________
96 reg cab, 5sp long bed 4x4: 10 plate, 3GSK, pump @15, AFC altered, K&N, gasket matched and ported exhaust manifold, 4" exhaust, gauges, KDP KO'ed, Dynatrac axles and hubs, airplane landing lights, Dana Powerlok's front & rear, runs on WVO.

ohanahorse · 11-02-2009, 04:19 PM

Hi, I thought of that, but when I pull it up manually, it seems to catch more like a mechanical issue. with the motor off, it slides up and down smoothly

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97 3500 Xcab 5spd 4x4 Nearly Normal

illflem · 11-02-2009, 09:31 PM

Without the lower bolt the solenoid doesn't line up correctly and will bind.
Been there, done that.
About all I can tell you is it's metric.

__________________
Bill
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Not stock

ohanahorse · 11-02-2009, 10:59 PM

Another of life's little mysteries solved>>Thank you sooo much. So once I figure the size, recommendations on making it stay since the last one is MIA...perhaps lock washer and loctite??

__________________
97 3500 Xcab 5spd 4x4 Nearly Normal

RPegram · 11-03-2009, 07:21 AM

M6 is the size, but not sure about length. It is fairly long compared to the other two. All the bolts going into pump are metric.

__________________
'96 Dodge 3500,KDP killed, boost-pyro-trans temp, not stock anymore
'01 Dodge 2500 4X4, EC, LB, 6 speed, FP-pyro-boost,
'97 Chevrolet Suburban, K1500, 4.10 gears

ohanahorse · 11-03-2009, 03:23 PM

I called local Cummins dealer. The say the bottom bolt is M6x1.0x45...I believe the with the conversion that it is a 6mm bolt that is 1.75 inches long...which seems about right...

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97 3500 Xcab 5spd 4x4 Nearly Normal

shorthair · 11-09-2009, 12:37 PM

Had the same problem with the solenoid not pulling up every time but a new relay fixed the problem, 2 of them to my door for $25 now I've got a spare.

__________________

97 2500 CC LB 4X4 Auto 3.54 215 injectors 4" exhaust 144k glow shift gauges

& a couple of German Shorthair copilots.

12vCTD · 11-09-2009, 02:51 PM

Quote:

Originally Posted by shorthair

Had the same problem with the solenoid not pulling up every time but a new relay fixed the problem, 2 of them to my door for $25 now I've got a spare.

i was gonna say relay for it too. mine every once in a while wont start and all i do it leave the key on and pop the hood and pull up the solenoid and its good to go. One of these years ill buy a few new relays. i saw some 70 amp ones on ebay that would prob work for like 15 bucks a set of four

__________________
96 2500 Ext Cab Long Bed 4x4 auto, 3.55's, silencer ring gone, #100 plate FF, starwheel & smoke screw turned in some, 5 inch SS exhaust, S&B intake, Di pricol guages, 285 baja claws, 2 inch leveling kit, bilstein shocks

11-01-2009, 11:25 PM	#1 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	Fuel shutoff solenoid question Hi, I pulled the afc this weekend and noticed that the bottom bolt that holds the fuel solenoid is MIA. Does anyone out there know what size that puppy is? Also, purchased allen bolts for the afc to be able to adjust-what's the torque specs for them and should i lock washer them? Seems I read that they vibrate loose... thanks __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

11-02-2009, 12:42 PM	#4 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	Update-Fuel shutoff solenoid question I forgot to mention..the solenoid is not always pulling the plunger up completely. I have to manually pull it (seems to stick) which results in less than 100% power/pull (it becomes a dog on hills). Could this be due to the bolt, or something else (It's like the transfer pump in that you cannot see the assemble to evaluate). I will be pulling the solenoid tonight to clean, but that does not seem to be the issue as it slides up and down fine and rod is correctly adjusted, and the boot is not getting in the way. __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

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11-02-2009, 03:04 AM	#2 (permalink)
JoshMock Cummins Fan Join Date: Aug 2009 Posts: 48 Thanks: 1 Thanked 0 Times in 0 Posts JoshMock's Truck Pics	for the sylenoid, just pull the screw you have and run to the parts store and get another one. as far as the afc bolts, if you talking about the four bolts on the top. just put them on and tighten them down, no torque spec or lock washers needed. __________________ 97 3500 ext cab dually - BHAF, AFC slid ff, 4" Exhaust

11-02-2009, 12:04 PM	#3 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	the bottom bolt is missing so I don't know the size...I was hoping someone out there knew. I'm thinking 1/4 fine thread but don't know length.... __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

11-02-2009, 04:08 PM	#5 (permalink)
*Baja* Cummins Nut Join Date: Apr 2006 Posts: 368 Thanks: 4 Thanked 10 Times in 9 Posts Baja's Truck Pics	If cleaning does not solve the sticking, I am wondering if you are getting enough voltage to pull the plunger up. __________________ 96 reg cab, 5sp long bed 4x4: 10 plate, 3GSK, pump @15, AFC altered, K&N, gasket matched and ported exhaust manifold, 4" exhaust, gauges, KDP KO'ed, Dynatrac axles and hubs, airplane landing lights, Dana Powerlok's front & rear, runs on WVO.

11-02-2009, 04:19 PM	#6 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	Hi, I thought of that, but when I pull it up manually, it seems to catch more like a mechanical issue. with the motor off, it slides up and down smoothly __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

11-02-2009, 09:31 PM	#7 (permalink)
illflem Moderator Join Date: Nov 2005 Location: Montana Posts: 4,961 Thanks: 4 Thanked 143 Times in 131 Posts illflem's Truck Pics	Without the lower bolt the solenoid doesn't line up correctly and will bind. Been there, done that. About all I can tell you is it's metric. __________________ Bill '95 2500 4wd auto '95 3500 5 speed heavy hauler Not stock

11-02-2009, 10:59 PM	#8 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	Another of life's little mysteries solved>>Thank you sooo much. So once I figure the size, recommendations on making it stay since the last one is MIA...perhaps lock washer and loctite?? __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

11-03-2009, 07:21 AM	#9 (permalink)
RPegram Cummins Nut Join Date: Sep 2009 Location: Arapahoe, NC Posts: 341 Thanks: 2 Thanked 30 Times in 29 Posts RPegram's Truck Pics	M6 is the size, but not sure about length. It is fairly long compared to the other two. All the bolts going into pump are metric. __________________ '96 Dodge 3500,KDP killed, boost-pyro-trans temp, not stock anymore '01 Dodge 2500 4X4, EC, LB, 6 speed, FP-pyro-boost, '97 Chevrolet Suburban, K1500, 4.10 gears

11-03-2009, 03:23 PM	#10 (permalink)
ohanahorse Cummins Fanatic Join Date: Aug 2006 Location: Eugene Oregon Posts: 105 Thanks: 6 Thanked 0 Times in 0 Posts ohanahorse's Truck Pics	I called local Cummins dealer. The say the bottom bolt is M6x1.0x45...I believe the with the conversion that it is a 6mm bolt that is 1.75 inches long...which seems about right... __________________ 97 3500 Xcab 5spd 4x4 Nearly Normal

11-09-2009, 12:37 PM	#11 (permalink)
shorthair Cummins Fanatic Join Date: Dec 2006 Posts: 123 Thanks: 0 Thanked 0 Times in 0 Posts shorthair's Truck Pics	Had the same problem with the solenoid not pulling up every time but a new relay fixed the problem, 2 of them to my door for $25 now I've got a spare. __________________ 97 2500 CC LB 4X4 Auto 3.54 215 injectors 4" exhaust 144k glow shift gauges & a couple of German Shorthair copilots.