Author Topic: Chamfered washer behind oil pump worm gear?  (Read 741 times)

Online berger

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Re: Chamfered washer behind oil pump worm gear?
« Reply #15 on: 20.04. 2020 10:40 »
I think they are those allen head or tourqsey whatsit bolts thingys, srm supply them, but I won't be using them on the berger build, studs all the way in ally

Offline Butch (cb)

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Re: Chamfered washer behind oil pump worm gear?
« Reply #16 on: 20.04. 2020 11:27 »
Quote
but not a hammer on an anvil (which is pretty hard)

know what you mean RDfella, but wonder about just how hard anvils are, I've seen quite a few in my time and they certainly "ring" when tapped but I've also noted a few that had bent! in places (like the end of the horn).
I loved to hear a smith using an anvil, always wondered though why the intermediate taps (sometimes two or more between striking the workpiece), possible a fatigue lessening method?


https://www.youtube.com/watch?v=e4Ao-iNPPUc
Warning - observations made by this member have a 93% unreliability rating.

Of Bikes; various, including ...
'58 S/Arm Iron Head Flash Bitza


Online bsa-bill

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Re: Chamfered washer behind oil pump worm gear?
« Reply #17 on: 20.04. 2020 11:39 »
oh my I used to drive a Massey like that
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline adunham1

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Re: Chamfered washer behind oil pump worm gear?
« Reply #18 on: 20.04. 2020 15:15 »
HI - wondering how the pump is held on, are those studs or nuts and are they supplied by SRM (looks nice)

Hi Bill, they are Allen head bolts and split washers supplied by SRM with the pump; along with a new gasket.

Offline ellis

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Re: Chamfered washer behind oil pump worm gear?
« Reply #19 on: 20.04. 2020 19:13 »
They are domed Allen cap screws. Click on the picture and all will be revealed.

ELLIS

Offline trevinoz

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Re: Chamfered washer behind oil pump worm gear?
« Reply #20 on: 20.04. 2020 22:20 »
Button Head, I think.

Offline Minto

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Re: Chamfered washer behind oil pump worm gear?
« Reply #21 on: 05.05. 2020 09:27 »
Havin just checked all the bits I've stripped off my engine, I don't have one of these shamfered washers between the worm gear and crank pinion. Should all A10 engines have this washer?
Cheers
Jase
52 A10 plunger
Aprilia RSVR

Offline Swarfcut

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Re: Chamfered washer behind oil pump worm gear?
« Reply #22 on: 05.05. 2020 09:44 »
 Jase.. Quick answer....Yes.   Depending on previous treatment, you may find the inner face of the hardened worm a bit ragged. This washer serves to position the worm above the oilpump drive spindle and provide a more even clamping force against the timing pinion, rather than just gouging into it.  Chamfer goes towards the timing pinion to clear the radiused change of shaft diameter, as already noted.

  Never considered if the original part was hardened, see earlier posts in this thread, but you can bet many motors are happily running around with a plain washer from the useful box. Any washer is better than no washer, so take your choice as to how you source one.

 Swarfy.

Offline Minto

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Re: Chamfered washer behind oil pump worm gear?
« Reply #23 on: 06.05. 2020 02:06 »
Thanks for the info Swarfy, got one ordered from Dragonfly, along with a couple of nuts n bolts for my "really useful" tin.
Cheers
Jase
52 A10 plunger
Aprilia RSVR