Announcement

Collapse
No announcement yet.

Question about which O-Ring goes first

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Question about which O-Ring goes first

    Greetings

    I have a question that does not properly show up online or in the manual.

    While trying to troubleshoot some issues last year, I removed the tank of my 2003 Yamaha Road start and disassembled, cleaned, and replaced the fuel petcock. However, it seemed to leak when it was in the off position and I was carrying it back to the bike, gas leaked. I did not, as usual, make note of which O-ring was in first or second, metal or rubber.

    So, I got a rebuild kit to replace all the possible leaking pieces. My problem now is, that I have an extra ring that does not show up in any diagram anywhere, and I would to put them back in the proper orientation.

    Between the petcock body and the switch are 3 rubber gaskets. One obviously fits into the body of the fuel cock. The next two are the question. One is a rubber O-ring and the other is a flat metal O-ring.

    Which ring goes inside next to the inside rubber gasket, rubber or metal?? . .. and which one goes to the outside to be pressed against the switch module?

    All online resources and even my own service manual show only one O-ring, as seen in the diagram. As you can see in the schematic, only one Item # 21 is shown between the cock body and the switch.

    Thank you in advance for any help you can provide.




    Click image for larger version

Name:	GEDC1828.jpg
Views:	133
Size:	2.75 MB
ID:	140150 Click image for larger version

Name:	cock.jpg
Views:	102
Size:	62.8 KB
ID:	140151

  • #2
    I couldnt quite follow your descriptionbut would like to offer some logical advice…

    rubber o-ring is not lubricated… it would be used as a seal without rotational rubbing to cause the o-ring to bind/tear…

    the metal ring would most likely be used between a rotational movement and a rubber o-ring to prevent the tearing of a non-lubricated rubber o-ring…

    does that help in resolving your problem..?

    i have never needed to disassemble my fuel petcock before so that is just a logical viewpoint of what you discussed in your problem description…..

    Comment


    • Cultosaurus
      Cultosaurus commented
      Editing a comment
      That is making perfect sense. Sorry about the confusion of my description. I'm still getting a leak in the off position. The problem is that the tighter that I screw down the plate, the harder it is to turn the switch. I've seen a video where the guy puts lubricant on the parts as he reassembles it. (he has an 1100, same petcock as the RS). It's actually a pretty fast leak. Even the old parts were not worn out, but I have installed the new ones. It's remaining a conundrum.

  • #3
    First the valve gasket goes in, then put the rubber o-ring on the handle knob. That o-ring seals between the knob and the housing. With the knob in place in the housing, put the wave washer on the handle side then the indicator plate on top of the wave washer. Make sure to lube a little grease around all of the pieces as you put it together.
    The wave washer keeps pressure against the valve handle to help keep the valve sealed.

    Comment


    • #4
      even with all new parts, including new washers for the bolts, some have gasket material attached, i still got dribble. my advice, is to put some permatex, non hardening gasket goop on the sides threads of the 2 bolts, but dont push any goop into the tank(like on the end ). i do this on all they yamahas. it seems to drool down the threads if u dont

      Comment


      • #5
        I finally have it down to a slow drip. And, I finally figured out why that may be.


        With the metal O-ring, (I think some times called a flange ring or wave washer?) there is always going to be that amount of space between the inside gasket and the outside cock lever that switches the positions.


        My question now is : since I'm still using a fuel pump, do I have to worry about any fuel ever getting to the carb, and therefor possibly into the crank case, should the bike ever be on it's side or for any other potential reason that the fuel ends up that far?

        Or, does that slow drip even matter? Because, with that ring in there, there is no way to get a complete compression to fully seal it. There should have been a slight purfling to seat the wave washer down just about the thickness of the washer. But, with the washer in place, there is always that slight gap. I just don't know if I've been worrying about this all for no reason. The pump should stop any fuel getting any further along. The parts catalog and the service manual don't even show a wave washer.


        Thank you for all the advice.






        Comment


        • #6
          You aren't worrying for nothing. The fuel shut off valve should not drip. You will need to completely shut off the fuel when you remove the fuel tank for maintenance or repairs.

          Comment


          • #7
            I just took a valve apart. I hope these photos help.

            Comment


            • #8
              The wave ring goes between the rotating member and the flange (cover). There is a groove that accepts the wave ring.

              Comment


              • #9
                The wave ring is the last part you will install before you put on the flange (cover) and screw it together.

                Comment

                Latest Posts

                Collapse

                Topics Statistics Last Post
                Started by Sykobox, 1 hour ago
                5 responses
                40 views
                0 likes
                Last Post Mr. Miyagi  
                Started by KFallsRider, 3 hours ago
                5 responses
                28 views
                0 likes
                Last Post Mr. Miyagi  
                Started by 6door7r, 7 hours ago
                9 responses
                44 views
                0 likes
                Last Post 6door7r
                by 6door7r
                 
                Started by roadiemort, 1 day ago
                5 responses
                23 views
                0 likes
                Last Post roadiemort  
                Started by roadiemort, 3 hours ago
                0 responses
                16 views
                0 likes
                Last Post roadiemort  
                Started by Mad Maj, 4 hours ago
                3 responses
                36 views
                0 likes
                Last Post Tcontrol  
                Started by Kmartcivic, 13 hours ago
                3 responses
                52 views
                0 likes
                Last Post Engineman  
                Started by Mad Maj, 1 week ago
                14 responses
                179 views
                0 likes
                Last Post Mad Maj
                by Mad Maj
                 
                Started by brianmac, 15 hours ago
                1 response
                44 views
                0 likes
                Last Post Shotround  
                Started by Bnag0, 04-13-2022, 11:05 PM
                103 responses
                1,301 views
                1 like
                Last Post Bnag0
                by Bnag0
                 
                Started by 6door7r, 4 days ago
                5 responses
                114 views
                3 likes
                Last Post Chromepony  
                Started by Lug Nut, 1 day ago
                3 responses
                60 views
                0 likes
                Last Post Lug Nut
                by Lug Nut
                 
                Started by Tykes_Place, 3 weeks ago
                27 responses
                320 views
                0 likes
                Last Post Lug Nut
                by Lug Nut
                 
                Started by p birk, 4 days ago
                16 responses
                164 views
                0 likes
                Last Post Tcontrol  
                Started by V-Max, 03-05-2018, 09:08 AM
                57 responses
                4,863 views
                0 likes
                Last Post Shotround  
                Started by luff_tackle, 2 days ago
                9 responses
                126 views
                0 likes
                Last Post brianmac  
                Started by jb3472, 3 days ago
                14 responses
                98 views
                0 likes
                Last Post Chooch
                by Chooch
                 
                Started by ABCarr, 5 days ago
                14 responses
                169 views
                0 likes
                Last Post ABCarr
                by ABCarr
                 
                Started by BloodMoney, 04-15-2022, 02:28 PM
                17 responses
                179 views
                0 likes
                Last Post BloodMoney  
                Started by Lug Nut, 4 days ago
                11 responses
                104 views
                2 likes
                Last Post Lug Nut
                by Lug Nut
                 
                Working...
                X