FAQ  •  Register  •  Login

Oil tank draining down

Moderators: Curt!, Pa

<<

El Rocky

Posts: 16

Joined: Sun Jun 10, 2012 8:33 am

Post Mon Jul 02, 2012 10:55 am

Oil tank draining down

Is the Oil tank draining down a normal thing on these Knuckleheads? will it lose prime on the pump when all the oil is in the crank case? this happens in about a week of setting :shock:
EL Roccky
<<

RUBONE

Posts: 381

Joined: Fri Nov 30, 2007 7:24 pm

Post Mon Jul 02, 2012 11:27 am

Re: Oil tank draining down

Virtually all of them will sump at some point, but a week is on the extreme end. Many will do it if left unridden for a long period, most ridden regularly do not do it at all! So it is not normal. Sounds like time to check the seats in the pump and replace the check balls.
Robbie
<<

El Rocky

Posts: 16

Joined: Sun Jun 10, 2012 8:33 am

Post Mon Jul 02, 2012 4:53 pm

Re: Oil tank draining down

I just had this motor put together by a shop that specializes in Knuckleheads, and they had to replace one gear in the pump, Maybe they did not do everything they shoud have to the pump, this motor had been sitting almost 60 years.
Thanks EL Rocky
<<

Lee W

Posts: 141

Joined: Sat Sep 23, 2006 8:58 pm

Location: Carver, MN

Post Tue Jul 03, 2012 11:49 am

Re: Oil tank draining down

And while you are inspecting the check ball and seat, don't forget the check ball spring. There is always a possibility that it is over 70 years old and has lost much of its tension.
<<

El Rocky

Posts: 16

Joined: Sun Jun 10, 2012 8:33 am

Post Tue Jul 03, 2012 4:48 pm

Re: Oil tank draining down

Thanks guys, should the spring be stretched a bit to give more tension? and yes this is the original 1936 spring, this motor even had standard .250" rollers in the mains and crank pin :o
Rocky
<<

Pa

Site Admin

Posts: 4754

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Tue Jul 03, 2012 7:48 pm

Re: Oil tank draining down

I would not suggest stretching the spring in order to gain tension. It will only collaspe again because spring tension is tempered in when the spring is freshly manufactured. Most spring steel is manufactured in long length and then cut to standard lengths per application.
<<

El Rocky

Posts: 16

Joined: Sun Jun 10, 2012 8:33 am

Post Tue Jul 03, 2012 10:30 pm

Re: Oil tank draining down

10-4, I will just get new manufactured springs, kinda like valve springs, old is old :lol:
Thanks
Rocky

Return to Knuckles

Who is online

Users browsing this forum: Bing [Bot], Majestic-12 [Bot] and 1 guest

cron
Powered by phpBB © 2000, 2002, 2005, 2007, 2012 phpBB Group.