Author Topic: oil pump removal  (Read 2331 times)

Offline Tone

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oil pump removal
« on: 13.08. 2009 19:58 »
Hi All, I have taken off the left hand thread locknut on the worm drive, Silly question but which way do you unscrew it to remove the pump? and should it be REALY tight?

Offline a10gf

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Re: oil pump removal
« Reply #1 on: 13.08. 2009 21:48 »
http://www.a7a10.net/forum/index.php?topic=1475.0 > removal description in #214, refitting in #215

Remember the small washer, part 126 > http://www.a7a10.net/BSA/techpics/crankdrivescan.jpg

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Online muskrat

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Re: oil pump removal
« Reply #2 on: 13.08. 2009 21:49 »
G'dat tone, Left hand as well. Should be firm but not overly tight. May have had locktite applied.
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Offline Tone

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Re: oil pump removal
« Reply #3 on: 13.08. 2009 22:17 »
Thanks guys I'll give it a go.

Offline Daniel Toro (DT)

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Re: oil pump removal
« Reply #4 on: 14.08. 2009 14:36 »
If was locked with some locktite, use an hand blowtorch or a lighter for a few seconds at the screw and should resolve.
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Offline Tone

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Re: oil pump removal
« Reply #5 on: 14.08. 2009 20:01 »
A10gf, Where is the small washer supposed to go, when I finally got the pump off there was nothing behind the worm drive, also there was no washer on the nose under the pump.

Offline a10gf

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Re: oil pump removal
« Reply #6 on: 14.08. 2009 23:56 »
Quote
Where is the small washer supposed to go

part 126 > http://www.a7a10.net/BSA/techpics/crankdrivescan.jpg
between pump and crankcase, on stud close to drive spindle.

As Far As I Can Remember, it's there to keep oilpump housing from bending when tightening. Try to get hold of the 67-645 crankshaft gear washer as well, to line it all up properly.

+ (again AFAICR) by removing studs first (without damaging threads!) the pump can be removed with crankshaft drive gear still on.

e

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Online trevinoz

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Re: oil pump removal
« Reply #7 on: 15.08. 2009 01:53 »
The order of components from the crankshaft out are - pinion, washer, worm drive, tab washer, lock nut.
As stated, there should be a fibre washer under the "nose" of the pump body to compensate for the gasket thickness under the main body.
Trev.

Offline Tone

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Re: oil pump removal
« Reply #8 on: 15.08. 2009 09:08 »
Thanks guys, Trev, I have a new tab washer for under the locknut, its got a little tab at right angles which goes in the groove, does the tab go under the locknut ie; facing out?

Online trevinoz

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Re: oil pump removal
« Reply #9 on: 16.08. 2009 22:26 »
The tab faces inwards.
Trev.