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Replacing sending unit in-cab tank
#2914388
04/24/21 04:14 PM
04/24/21 04:14 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
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Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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'79 W150 with in cab tank (yes I promise factory unit on a 1979). My unit is leaking from the top fuel feed nozzle. I THINK it's a pretty straight forward job. Disconnect battery, disconnect wire to sending unit, tap lock ring counter clockwise to loosen, pull out sending unit, put on new rubber gasket, feed in new unit, lock ring by turning clockwise, reconnect wire then battery. Is it this simple? New unit already has sock on it. I'll index it the same as the old one. Thanks. Never installed new one before but with it right at top of tank, seems like it should be a no-brainer, which is perfect for me 
Last edited by larrymopar360; 04/24/21 04:16 PM.
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: stumpy]
#2914426
04/24/21 06:02 PM
04/24/21 06:02 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
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Stud Muffin
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Stud Muffin
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Posts: 15,831
Central Florida
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Easy job and no need to disconnect the battery. The sending unit wire is a ground. Thank you!
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: stumpy]
#2914702
04/25/21 11:24 AM
04/25/21 11:24 AM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
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Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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It is safer if you use a brass or plastic tool to tap on the ring with. Don't want to create any sparks if you can help it. That makes sense stumpy, good tip. Thank you very much.
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: poorboy]
#2914703
04/25/21 11:25 AM
04/25/21 11:25 AM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
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Stud Muffin
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Stud Muffin
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Central Florida
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Just make sure the "O" ring is in the proper location before you tighten the lock ring or you could cut the "O" ring. Got it, thank you. I was wondering if it'll try and turn with the lock ring and bind up. As I said, first one I've done because most aren't so easy to get to. Hopefully Thursday when I'm off work.
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: larrymopar360]
#2914951
04/25/21 09:43 PM
04/25/21 09:43 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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They have tabs that locate them in the tank.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Replacing sending unit in-cab tank
[Re: 5thAve]
#2915207
04/26/21 01:45 PM
04/26/21 01:45 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
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Stud Muffin
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Stud Muffin
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Central Florida
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Did you think about putting some JB weld around that line where it leaks? Usually the original senders are better then the afternarket ones are.
I didn't know or think about still having in cab tanks in 79. I did consider JB weld or similar just to keep it on road until I replace, but it might be a permanent solution  . I also looked for a NOS one on ebay, but none right now. I too am leery of aftermarket ones, but this particular seller has sold 100's with 100% feedback, so I decided to take a chance, and he has a 30 day return policy. Hope I don't regret it.
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: larrymopar360]
#2915231
04/26/21 02:21 PM
04/26/21 02:21 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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If it were mine I'd clean it up and silver solder that area.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Replacing sending unit in-cab tank
[Re: Guitar Jones]
#2915239
04/26/21 02:29 PM
04/26/21 02:29 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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If it were mine I'd clean it up and silver solder that area. I can't solder worth a darn lol. I know it's not rocket science but no experience, and last time I tried I just rolled the bead around everywhere but where I wanted it. I'll keep the old sending unit in case new one has to be sent back.
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: 5thAve]
#2915245
04/26/21 02:34 PM
04/26/21 02:34 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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Did you think about putting some JB weld around that line where it leaks? Usually the original senders are better then the afternarket ones are.
I didn't know or think about still having in cab tanks in 79. With dual tanks
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: larrymopar360]
#2916154
04/28/21 02:42 PM
04/28/21 02:42 PM
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Joined: Jan 2003
Posts: 12,043
State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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Just my own opinion, but I like the new sending units. The new ones are made from stainless steel (usually) so they do not have the rust pinhole issues the original ones do from condensation in the tank.
And soldering or using JB Weld to fix the leak he has, might just be a bandaid for an undetected internal rust issue along the section of pickup tube still in the tank.
I have pulled some that had either lost a good 6" or so of tube into the tank, or had so many pinholes that they wouldn't pickup fuel anymore. Probably from being parked for long periods of time and allowing the condensation to remain at a set level and do its work.
Join the Penguin Liberation Front!!
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Re: Replacing sending unit in-cab tank
[Re: hp383]
#2916173
04/28/21 03:42 PM
04/28/21 03:42 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
OP
Stud Muffin
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OP
Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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Just my own opinion, but I like the new sending units. The new ones are made from stainless steel (usually) so they do not have the rust pinhole issues the original ones do from condensation in the tank.
And soldering or using JB Weld to fix the leak he has, might just be a bandaid for an undetected internal rust issue along the section of pickup tube still in the tank.
I have pulled some that had either lost a good 6" or so of tube into the tank, or had so many pinholes that they wouldn't pickup fuel anymore. Probably from being parked for long periods of time and allowing the condensation to remain at a set level and do its work. Thanks. New one is definitely stainless. I'll get new sock filter this way also, and as I wrote before seller has sold a ton of these and 100% feedback
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: 5thAve]
#2916529
04/29/21 01:05 PM
04/29/21 01:05 PM
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Joined: Jan 2011
Posts: 15,831
Central Florida
larrymopar360
OP
Stud Muffin
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Stud Muffin
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Posts: 15,831
Central Florida
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I did have problems with spectra aftermarket senders. And I have also read about problems with them from other people using them. I am keeping my fingers crossed on this one...not a spectra and lots of good feedback. At least it’s very easy to get to with no dropping the tank and I will send it right back for refund if bad and go plan B. which probably will be finding NOS
Facts are stubborn things.
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Re: Replacing sending unit in-cab tank
[Re: larrymopar360]
#2916582
04/29/21 03:11 PM
04/29/21 03:11 PM
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Joined: Jan 2003
Posts: 12,043
State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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vansauto.com sells sending units for a wide variety of the truck applications and any I have used has the correct ohm rating to show the correct level.
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