Thru tank gas shutoff

Post Reply
papanhead49
Posts: 16
Joined: Tue Oct 21, 2008 12:40 am
Bikes: 1949 FL
2002 fxdl
Been thanked: 5 times

Thru tank gas shutoff

#1

Post by papanhead49 » Sat Nov 08, 2008 10:03 pm

I'm rebuilding my dad's 49 fl. I can't find a picture of where the spring goes on the shutoff rod. Does the spring go under the cap that you screw to turn the gas on and off or does it go inside the tank. I'm new at this so I'm pretty green :mrgreen: but trying my best.



Guest

Re: Thru tank gas shutoff

#2

Post by Guest » Sat Nov 08, 2008 11:12 pm

On top of the tank, between the brass screw on cap, and the rubber washer. It just keeps the washer tight.
Mike

steve_wood
Posts: 947
Joined: Tue Jan 08, 2008 12:32 am
Bikes: 56 FLH, 2007 FLHRCI
Location: Belleville, Ontario, Canada
Has thanked: 48 times
Been thanked: 27 times

Re: Thru tank gas shutoff

#3

Post by steve_wood » Sat Nov 08, 2008 11:18 pm

It actually goes underneath the cap that screws onto the gas tank. This is the cap that's under the cap you turn to shut on/off the gas.

It goes like this from the top down:

- Cap
- Spring
- Washer
- Seal
- Gas tank

Hope this helps. You can see the pictures in the parts manual for OHV, WL and servi-cars up to 1957. There's also a good picture of it in Clymer's on page 298.

steve

FlatHeadSix
Moderator
Posts: 2685
Joined: Sun Jun 06, 2004 5:14 pm
Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
Location: Lonoke, Arkansas
Has thanked: 5 times
Been thanked: 32 times

Re: Thru tank gas shutoff

#4

Post by FlatHeadSix » Sun Nov 09, 2008 2:02 am

how about a picture? this is from the WL parts manual so it shows the old part numbers but the parts are the same and so is the order of assembly

mike
You do not have the required permissions to view the files attached to this post.

FlatHeadSix
Moderator
Posts: 2685
Joined: Sun Jun 06, 2004 5:14 pm
Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
Location: Lonoke, Arkansas
Has thanked: 5 times
Been thanked: 32 times

Re: Thru tank gas shutoff

#5

Post by FlatHeadSix » Sun Nov 09, 2008 2:27 am

papanhead49

If you haven't put the fuel rod assembly back in the tank yet this would be a good time to closely inspect the cavity in the top of the tank that all that stuff goes into. Look down the hole with a good light and make SURE that all of the old seal is completely removed from the well before you install the new one. The old seals (3634-40 in the illustration) became hard and brittle with age and exposure to gas fumes, parts of the original may still be stuck down in the hole. You can usually clean it all out of there with a pick or a probe. Stay away from any New Old Stock (NOS) leftover war surplus seals, there are still plenty of them around and lots of vendors are selling them on ePay and elsewhere but they usually aren't any good because age has made them too hard to seal anymore. Your new seal should be a little soft and flexible and it should also slightly grip the rod after you install the washer, spring, and cap. The grip is important because this is what holds the rod in the "up" or "reserve" position, its no fun at all if you have to keep one hand on the fuel shut off rod while riding the bike to the nearest gas station!

just a couple of tips for what they're worth.....

mike

papanhead49
Posts: 16
Joined: Tue Oct 21, 2008 12:40 am
Bikes: 1949 FL
2002 fxdl
Been thanked: 5 times

Re: Thru tank gas shutoff

#6

Post by papanhead49 » Sun Nov 09, 2008 4:41 am

Thanks for all the info. I had the washer, rubber and spring inside the tank. Will fix soon. Thanks for the fast responses. I'm sure I'll be picking your brains in the future.

partshunt
Panhead Register Member
Posts: 305
Joined: Sun Sep 24, 2006 9:04 am
Location: "Big Timber Country" Western Canada
Has thanked: 1 time
Been thanked: 2 times

Re: Thru tank gas shutoff

#7

Post by partshunt » Sat Nov 15, 2008 12:02 pm

By the way: For those who have lost the spring or just need another, the 4764-26 spring is the same one used in the horn button first statred in 1926 JD and on to Panheads and shovel. Just a small unoticed little item to some of us for years..............Joe

Cotten
Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois
Has thanked: 100 times
Been thanked: 268 times

Re: Thru tank gas shutoff

#8

Post by Cotten » Sat Nov 15, 2008 12:59 pm

Originally, the seal was cork. The spring and washer were required to compress the cork more and more as it slowly wore out.

I have had better luck with just two greased neoprene seals, and shelving the spring and washer. Modern fuels swell the seals to where they have plenty of resistance to hold the assembly up for reserve.
(I found a box of a thousand seals in an alley, intended for use with roofing nails.)

....Cotten

john HD
Moderator
Posts: 3677
Joined: Sat Aug 20, 2005 7:24 pm
Bikes: '42 WLA X 2, '55FL, '93 Ultra Classic, '91 Fatboy, '97 883, '71 Suzuki Duster 125, '83 GPz 750.
Has thanked: 52 times
Been thanked: 77 times

Re: Thru tank gas shutoff

#9

Post by john HD » Wed Nov 19, 2008 10:35 pm

i found some nice fat o rings at ace hardware that work well with the spring under the cap.

working well so far.

john

mbskeam
Posts: 1006
Joined: Tue Mar 16, 2004 5:52 am
Location: Sultan, WASH
Been thanked: 2 times
Contact:

Re: Thru tank gas shutoff

#10

Post by mbskeam » Thu Nov 20, 2008 3:28 am

same hrer, big fat o-ring, been this way for 15 years and cheap too.....

mbskeam

FlatHeadSix
Moderator
Posts: 2685
Joined: Sun Jun 06, 2004 5:14 pm
Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
Location: Lonoke, Arkansas
Has thanked: 5 times
Been thanked: 32 times

Re: Thru tank gas shutoff

#11

Post by FlatHeadSix » Thu Nov 20, 2008 4:17 am

I used to keep a wooden clothes pin in the saddle bag, it is probably still in there. Before I replaced the old cork seal with, guess what?, an "O" ring from ace hardware, the fuel rod would never stay in the reserve position so I would just pull it up and stick the clothes pin under it until I got to the gas station.

hey, it worked!

mike

awander
Site sponsor
Site sponsor
Posts: 1232
Joined: Fri Sep 21, 2007 3:03 am
Bikes: '52 FL
'64 FLH
Has thanked: 7 times
Been thanked: 53 times

Re: Thru tank gas shutoff

#12

Post by awander » Thu Nov 20, 2008 6:15 pm

You can also hold the rod up by hand, and when you take your hand away to shift, there is enough fuel in the bowl to keep things running.

Post Reply

Return to “Fenders, Primary, Tanks & Paint”