pressurized gas tank on 420C
pressurized gas tank on 420C
Had a scary and very unexpected event over weekend. Had been dozing a brushline and decided to check gasoline level before moving deeper into woods. Loosened gas cap and it blew up and away from my hand. I then had a fountain of gas streaming from the tank port, spraying on me and a hot engine.
Does anyone know if this gas cap is supposed to be vented in both directions or did Deere do something very genius and use thermal expansion in place of a fuel pump?
Does anyone know if this gas cap is supposed to be vented in both directions or did Deere do something very genius and use thermal expansion in place of a fuel pump?
- Stan Disbrow
- 350 crawler
- Posts: 2898
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
No pressure on those. There is a vent line which heads downwards as it also acts as an overflow line.
Yours is plugged. Probably by a mud dauber wasp nest.
Stan
Edit: Or, bent plugged. I have seen that, too.
No pressure on those. There is a vent line which heads downwards as it also acts as an overflow line.
Yours is plugged. Probably by a mud dauber wasp nest.
Stan
Edit: Or, bent plugged. I have seen that, too.
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
- Stan Disbrow
- 350 crawler
- Posts: 2898
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
Ah. The double post after an edit right after the main post bug strikes again!
Stan
Ah. The double post after an edit right after the main post bug strikes again!
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Stan I never noticed this vent line on a 420 gas tank. Where is this vent line located? The only connection on the gas tank that I ever noticed was for the fuel line bowl.Stan Disbrow wrote:Hi,
No pressure on those. There is a vent line which heads downwards as it also acts as an overflow line.
Yours is plugged. Probably by a mud dauber wasp nest.
Stan
Edit: Or, bent plugged. I have seen that, too.
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
Early 420 will not have a vent line. It is possible you have a non vented cap installed.
Lavoy
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com
Owner and moderator www.jdcrawlers.com
That makes sense lavoy, I have a 56, 420. And I am 99.9% positive there is no vent line. My gas cap does hiss from time to time to release the tank pressure. So traber1 you must not have a vented cap installed or something went wrong with the gas cap.Lavoy wrote:Early 420 will not have a vent line. It is possible you have a non vented cap installed.
Lavoy
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
- Stan Disbrow
- 350 crawler
- Posts: 2898
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
Ah. Yet something else to store away in the wetware.
My 420c is a 58. And I have had several 420 and 430 wheel tractors. All had tank vent lines (that mud daubers like to plug up, and a couple where POs had managed to mash shut as well).
Stan
PO = Previous Owner....and....exactly what else it *usually* means!
There is a new tag line for someone: Nothing will P*** you Off like a Previous Owner!
Ah. Yet something else to store away in the wetware.
My 420c is a 58. And I have had several 420 and 430 wheel tractors. All had tank vent lines (that mud daubers like to plug up, and a couple where POs had managed to mash shut as well).
Stan
PO = Previous Owner....and....exactly what else it *usually* means!
There is a new tag line for someone: Nothing will P*** you Off like a Previous Owner!
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
- Stan Disbrow
- 350 crawler
- Posts: 2898
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
Come to think on it, my 1950 M does not have the gas tank vent line, but a vented cap....which dribbles gas out the top if I overfill it and it expands faster than I burn it.....
Stan
Come to think on it, my 1950 M does not have the gas tank vent line, but a vented cap....which dribbles gas out the top if I overfill it and it expands faster than I burn it.....
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
- Paul Buhler
- 350 crawler
- Posts: 991
- Joined: Wed May 21, 2008 6:25 pm
- Location: Killington, VT
My 1958 420 has a vent line to nowhere, and a vented cap. The PO thought of every thing.
Actually, I don't want to make fun of this person. I see that he did a lot of good but cash strapped maintenance over the years while working his dozer hard. It is still a strong machine serving me well - fingers crossed.
Actually, I don't want to make fun of this person. I see that he did a lot of good but cash strapped maintenance over the years while working his dozer hard. It is still a strong machine serving me well - fingers crossed.
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
Yes Stan, the gas dripping out of the cap sounds familiar. I have learned to only put two or three gallons in the tank at a time when needed to prevent this. My J on my John Deere sticker on the hood was starting to get deformed quickly because of this! These crawlers sip the gas anyways!Stan Disbrow wrote:Hi,
Come to think on it, my 1950 M does not have the gas tank vent line, but a vented cap....which dribbles gas out the top if I overfill it and it expands faster than I burn it.....
Stan
1956 JD420, gearmatic 8a winch, custom 6 way blade and FOPS.
- Stan Disbrow
- 350 crawler
- Posts: 2898
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Hi,
I keep them near full, 10 gallons or so of 100 octane unleaded. As the gummint keeps futzing with pump gas, I kept on upping the mix until I just use all racing fuel. But, one does not want that stuff leaking out. It ignites far easier than the usual crap does.....
Stan
I keep them near full, 10 gallons or so of 100 octane unleaded. As the gummint keeps futzing with pump gas, I kept on upping the mix until I just use all racing fuel. But, one does not want that stuff leaking out. It ignites far easier than the usual crap does.....
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (now known as 5045D)
- Paul Buhler
- 350 crawler
- Posts: 991
- Joined: Wed May 21, 2008 6:25 pm
- Location: Killington, VT
Page 15-12 of parts catalog.
http://t.jdpc.deere.com/jdpc/servlet/co ... #mw_search
Type in "420" for model. Scroll down to "505"catalog.
Updated Note: Link was established on an I-pad. apparently, a PC gets different results.
Try This link instead:
http://jdpc.deere.com/jdpc/pdfs/PC0505.pdf
it takes a while to download.
http://t.jdpc.deere.com/jdpc/servlet/co ... #mw_search
Type in "420" for model. Scroll down to "505"catalog.
Updated Note: Link was established on an I-pad. apparently, a PC gets different results.
Try This link instead:
http://jdpc.deere.com/jdpc/pdfs/PC0505.pdf
it takes a while to download.
Last edited by Paul Buhler on Fri Aug 12, 2016 9:13 am, edited 2 times in total.
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
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