Harley Davidson Forums
Harley Davidson Forums - Harley Davidson Classifieds - HDForums.com Photo Galleries - Create an Account - Harley Davidson News

Go Back   Harley Davidson Forums > Harley Davidson Motorcycles > Classic > Ironhead
New! Use your Facebook, Google, AIM & Yahoo accounts to securely log into this site, click logo to login  

Ironhead A place to talk about Ironheads.


Welcome to HDForums.com!
Welcome to HDForums.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join HDForums.com community today!


Reply
 
Thread Tools Search this Thread
  #41  
Old 10-13-2009, 10:27 AM
nwpaironhead's Avatar
nwpaironhead nwpaironhead is offline
Prospect
1973 Harley Davidson Sportster
 
Join Date: Jun 2009
Location: Meadville Pa.
Posts: 179
Default

Another thing I gotta take a look at tonight is the accelerator pump shut off valve. I had two different types and may have put in the wrong one.The carb is lower than the tank. If that's not seating,its constantly going to flow, right? The lights are starting to come on now!

Thanks.
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on HD Forums!
Reply With Quote
  #42  
Old 10-13-2009, 10:54 AM
piniongear's Avatar
piniongear piniongear is offline
Outstanding HDF Member
 
Join Date: Feb 2006
Location: Houston Texas
Posts: 2,644
Default

Quote:
Originally Posted by nwpaironhead View Post
Wait a second, do you mean that the spring is actually supposed to stick out of the carb between the gasket and the bowl? When I originally tore down the 1st bendix,that's the way it was and I just thought it was wrong. I could have easily misinterpreted my re-build instructions. The picures I have in my manual are of a non adjustable model.
That is correct. On my Bendix you can see the end of the spring sticking out of the carb. It is buried in the gasket material when you tighten down the float bowl screws. Most likely the straight secting of spring is long enough to actually stick out of the carb. It does on mine and I have tried (without success) to keep it inside the bowl.

Like I said..... I don't like the design, but that is how they did it. As long as it does not leak it will be fine. I just thought I would point this out in my earlier post.
pg
__________________

Rolling down the highway on two wheels since 1957...
Owner Red/White 1971 XLCH & 2003 FXDL-Silver over Black

Reply With Quote
  #43  
Old 10-13-2009, 11:09 AM
piniongear's Avatar
piniongear piniongear is offline
Outstanding HDF Member
 
Join Date: Feb 2006
Location: Houston Texas
Posts: 2,644
Default

Quote:
Originally Posted by nwpaironhead View Post
Another thing I gotta take a look at tonight is the accelerator pump shut off valve. I had two different types and may have put in the wrong one.The carb is lower than the tank. If that's not seating,its constantly going to flow, right? The lights are starting to come on now!

Thanks.
U-hhh, let me see if I understand you.........
The carb is lower than the tank.
The fuel runs down into the float bowl.
The fuel level rises inside the float bowl. This raises the float at the same time of course.
When the float has risen to the exact spot you just set with a 3/16 inch drill bit as a gage, the needle is pushed into the seat. This shuts off the fuel flow from the tank.

When you run the engine, fuel is taken out of the float bowl and the fuel level falls.
The float falls too and this lets the needle drop out of the seat (due to gravity) which allows fuel to again run into the bowl from the tank.
The float begins to rise again and the needle gets pushed back into it's seat. This cycle repeats again and again.

Fuel leaves the float bowl to enter the engine at a lower flow rate than the fuel flows from the tank into the bowl.
If your float level is incorrect (to low a level), the needle never gets put into it's seat, so the fuel flow from the tank never shuts off. The result is the fuel level in the bowl comes up so far that it pukes out the overflow tube.

If the float level is set to high, this condition puts the needle into it's seat too soon and the carb (engine) is starved for fuel because there is not enough fuel in the float chamber to supply the engine with fuel.
pg.
__________________

Rolling down the highway on two wheels since 1957...
Owner Red/White 1971 XLCH & 2003 FXDL-Silver over Black

Reply With Quote
  #44  
Old 10-13-2009, 11:22 AM
nwpaironhead's Avatar
nwpaironhead nwpaironhead is offline
Prospect
1973 Harley Davidson Sportster
 
Join Date: Jun 2009
Location: Meadville Pa.
Posts: 179
Default

Aah, yes. And the fuel level in the acc pump valve area can't raise any higher than the level in the float bowl without actuating the accelerator pump ...because when the float is set correctly, the float valve has seated and will not allow any more fuel into the carb. Regardless of wether or not the acc pump valve is correct. Thank you for ypur patience! I'm a gettin there.
Reply With Quote
  #45  
Old 10-13-2009, 11:29 AM
piniongear's Avatar
piniongear piniongear is offline
Outstanding HDF Member
 
Join Date: Feb 2006
Location: Houston Texas
Posts: 2,644
Default

Quote:
Originally Posted by nwpaironhead View Post
Aah, yes. And the fuel level in the acc pump valve area can't raise any higher than the level in the float bowl without actuating the accelerator pump ...because when the float is set correctly, the float valve has seated and will not allow any more fuel into the carb. Regardless of wether or not the acc pump valve is correct. Thank you for ypur patience! I'm a gettin there.
Yep! Also, the original Bendix from Harley was supposed to have 3 'adjustment' holes in the accelerator pump, where you can set it for richer or leaner operation.
My Bendix I bought from the manufacturer (Zenith Corp) and it has no such adjustment. It is a fixed one hole model which is fine. One less thing to deal with.
pg
__________________

Rolling down the highway on two wheels since 1957...
Owner Red/White 1971 XLCH & 2003 FXDL-Silver over Black

Reply With Quote
  #46  
Old 10-13-2009, 12:35 PM
nwpaironhead's Avatar
nwpaironhead nwpaironhead is offline
Prospect
1973 Harley Davidson Sportster
 
Join Date: Jun 2009
Location: Meadville Pa.
Posts: 179
Default

I have 2 different pumps from 2 re-build kits. One with and one without adjustment holes. I now which one I'm gonna use now! I'd buy you an e-beverage if I could.
Reply With Quote
  #47  
Old 10-13-2009, 12:41 PM
piniongear's Avatar
piniongear piniongear is offline
Outstanding HDF Member
 
Join Date: Feb 2006
Location: Houston Texas
Posts: 2,644
Default

Quote:
Originally Posted by nwpaironhead View Post
I have 2 different pumps from 2 re-build kits. One with and one without adjustment holes. I now which one I'm gonna use now! I'd buy you an e-beverage if I could.
Use which ever is in the best condition. If both are the same condition....use the fixed non adjustable pump. Keep it simple.
pg
__________________

Rolling down the highway on two wheels since 1957...
Owner Red/White 1971 XLCH & 2003 FXDL-Silver over Black

Reply With Quote
  #48  
Old 10-13-2009, 12:44 PM
nwpaironhead's Avatar
nwpaironhead nwpaironhead is offline
Prospect
1973 Harley Davidson Sportster
 
Join Date: Jun 2009
Location: Meadville Pa.
Posts: 179
Default

Will do.
Reply With Quote
  #49  
Old 10-13-2009, 06:28 PM
nwpaironhead's Avatar
nwpaironhead nwpaironhead is offline
Prospect
1973 Harley Davidson Sportster
 
Join Date: Jun 2009
Location: Meadville Pa.
Posts: 179
Default float spring

Hey Pinion,
I've got the float set at 3/16" per your instruction. I have pulled the float pin and was preparing to re-install the float spring when I got to wondering..,the small tab on the spring...is that supposed to go on the same side of the float tab as the valve tab/catch? In my instructions it appears as though it does, but i cant tell in the image you sent. Is it supposed to aid in opening or closing the valve?
__________________
George
Reply With Quote
  #50  
Old 10-13-2009, 07:11 PM
piniongear's Avatar
piniongear piniongear is offline
Outstanding HDF Member
 
Join Date: Feb 2006
Location: Houston Texas
Posts: 2,644
Default

Quote:
Originally Posted by nwpaironhead View Post
Hey Pinion,
I've got the float set at 3/16" per your instruction. I have pulled the float pin and was preparing to re-install the float spring when I got to wondering..,the small tab on the spring...is that supposed to go on the same side of the float tab as the valve tab/catch? In my instructions it appears as though it does, but i cant tell in the image you sent. Is it supposed to aid in opening or closing the valve?
In the way I am understanding your question, the answer is yes.
The float spring has 2 ends.
One is long and straight. This rests against the gasket.
The other end of the spring has a U shaped bend and this goes on the same side as the float tab. The float valve has a clip on it that goes through the float tab. Hope that is what you are asking.
pg
__________________

Rolling down the highway on two wheels since 1957...
Owner Red/White 1971 XLCH & 2003 FXDL-Silver over Black

Reply With Quote
Reply

Tags
1340, bushing, cam, cover, crank, crankcase, direction, drain, harley, leaks, panhead, plug, replace, replacing, seal


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Advertising
Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 07:24 PM.
Advertising Information - Harley Davidson Forums - Archive - Top

© Internet Brands, Inc.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2010, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.2.0