check valve
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Road Master
Joined: Aug 2008
Posts: 990
Likes: 3
From: lakeside ca.
check valve
any body know anything about the check valve that is supposed to keep the oil in the tank / not engine??
have heard something about a easy repair or fix ??
other than starting it once a week or so ??
have heard something about a easy repair or fix ??
other than starting it once a week or so ??
The check valve is in the oil pump. It prevents [mostly anyway] oil from draining into the case while the bike is sitting. For most of these bikes it seems to not work well.
For some earlier years you have to remove the engine from the frame in order to remove the oil pump. I do not recall which year started the flat on the frame rail allowing the pump to come off with the engine in - around 1977 or so.
So if you have that newer one it is not a hard job. Remove the oil pump and follow the manual. For the older models is, to say the least, more involved.
For some earlier years you have to remove the engine from the frame in order to remove the oil pump. I do not recall which year started the flat on the frame rail allowing the pump to come off with the engine in - around 1977 or so.
So if you have that newer one it is not a hard job. Remove the oil pump and follow the manual. For the older models is, to say the least, more involved.
Road Master
Joined: Mar 2006
Posts: 775
Likes: 2
From: OC California
You don't need to remove the pump to get to the check valve on older models. The check valve seat is part of the pump body. There is a ball and spring that closes oil flow with no pressure (that is what is supposed to happen anyway). The valve assembly is behind the fitting that has the pressure sensor on it (front of the pump). Remove the sensor and the fitting and the spring and ball will come out. DRAIN THE TANK FIRST. Clean the seat and replace the spring and ball with new ones.
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
Along with Cal's suggestion of a new ball and spring, I would add this......
Insert the new ball into the pump body. Using a wood dowel and a small hammer, lightly bump the ball against the seat. I said lightly!
Now install the spring and sender unit............. pg
Insert the new ball into the pump body. Using a wood dowel and a small hammer, lightly bump the ball against the seat. I said lightly!
Now install the spring and sender unit............. pg
I stand corrected! and glad of it. Glad i now have the correct info.
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Intermediate
Joined: Nov 2008
Posts: 32
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I actually put a petcock into my drain plug so I could drain it easily. But tomorrow I will try to seat the ball with a dowel . I get anywhere between 11 and 20 oz. of oil in my sump over night.. someone told me try to stretch the spring out a little. tried that with no avail....
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Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
I actually put a petcock into my drain plug so I could drain it easily. But tomorrow I will try to seat the ball with a dowel . I get anywhere between 11 and 20 oz. of oil in my sump over night.. someone told me try to stretch the spring out a little. tried that with no avail....
Stretching the spring will only ruin it. Not what you want to do.
So what you do want to do now is:
Buy a new ball and a new spring.
Remove the old ball and spring.
Place the new ball into the pump.
With a short piece of wood dowel, place the dowel against the ball and tap the dowel end LIGHTLY with a small hammer to seat the new ball into the pump body.
Install the new spring and you have done all you can do for the oil leaking past............... pg
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