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Sportster Motorcycle - Bottom End Cams, Cases, Gears, Flywheel, Piston Conecting Rods, Oil Pump, etc...

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  #1  
Old 19th July 2019
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Default Removing oil pump

Will the oil pump drop on the rubbermounts without removing anything in the cam chest?
Will it clear the frame? Looks pretty tight.
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Old 19th July 2019
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Yes it drops right out with the bolts out.
Prime the gerotors on the new one with assembly lube before installing it to keep down cavitation.
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Last edited by Hippysmack; 19th July 2019 at 01:36..
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Well I thought it did but I was just looking tonight and it looks like it would hit the frame. Just getting everything together for when it gets here but I forgot about a gasket too. I'm assuming the new pump won't come with one.
I want to be able to tear it down, replace the pump, and move the breathing to the cam chest and get it back together in a day without any "oh shit I need this."
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Old 19th July 2019
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Get a LONG 3/16 allen bit
https://www.napaprolink.com/detailmi.aspx?R=CHQSHL3806
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I might have one. How long? I've got one built into a 1/4 drive socket but the bit itself is maybe 5/8 long.

Last edited by 60Gunner; 19th July 2019 at 02:16..
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I got mine out without removing the cam cover - it's tricky, but I just had to prove if it could be done.

It helps to remove certain fittings from the pump. I don't know exactly best order of steps, because I had the pump all the way loose and tried to pull it out but it wouldn't fit between, so then I removed a fitting or two and wiggled it out. Also I'm pretty sure one or both of the bolts stay with the pump, at least until you wiggle it sideways.

What I didn't do, but could make it easier, is to make put a jack under the motor and lift it a tiny bit.
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Quote:
Originally Posted by rocketmangb View Post
Not sure that's needed - I used a regular L-shaped one with ball end.
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I could pull the front mount easy enough and jack the motor up if I have to.
How far does it need to drop for the gear to clear?
Cam cover is coming off any way to drill and tap a hole and put a baffle in.
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Quote:
Originally Posted by 60Gunner View Post
I could pull the front mount easy enough and jack the motor up if I have to.
How far does it need to drop for the gear to clear?
The gear will clear and you can get it sideways with no trouble, but getting between the frame is the problem.

Don't think you would even have to take the mount loose, just lifting 1/4" would make it easier. But like I said I didn't even do that. (I wanted to prove if this is something I could do in a parking lot, with only the regular tools I carry)
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Default

Gunner, there is no need to raise the engine unless your knees are like mine.
Only if you can't get to it.
edit: That should read raise the frame. The pump can be removed with the engine in place bolted down.
The pump literally drops down when you remove the bolts.
It drops to the frame with the lines off.

This is what rocket is referring to.

The front bolt can be removed / installed with a regular size Allen wrench but the rear bolt is inside the frame.
So you have to go between the frame and the engine to get to that bolt.
A regular size Allen wrench is very difficult to use as the 90° bend on the end hits the frame /engine.
This 3/16“x6” Allen socket makes the job a lot easier.
edit: The Allen wrench just needs to be longer so you have more room to work.
I'll end up throwing sh!t if I tried to use a regular sized Allen.
If the pump still sticks to the gasket with the bolts out, just wiggle it L to R and it should come free.
Don't be tempted to tap it front to back as the gear mesh has no where to go but into each other.
Side to side has a little give.


Last edited by Hippysmack; 19th July 2019 at 03:33..
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