www.stationaryengineforum.net
Please log in , the forum is open to guests who are now able to view every section, feel free to become a member , you will then be able to post and reply to topics.

Help please : Villiers MK20 Reduction Gearbox cover removal

View previous topic View next topic Go down

Help please : Villiers MK20 Reduction Gearbox cover removal

Post by Slim on Sat Feb 22 2014, 17:28

I'm trying to remove the cover on the reduction gearbox and output shaft on a Villiers Mk20 4 stroke, I've undone all the cover nuts but despite heavy persuasion its only moved a few mm but will not come off, I've obviously missed something and before I completely Muller it I thought I'd ask.

Regs
Dale

Slim
Born to be wild
Born to be wild

Posts : 24
Join date : 2013-06-28
Location : Peterborough

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by Villiers on Sat Feb 22 2014, 18:11

Far as I know it's a ring of bolts and a bearing. remove the bolts and then prise it off the bearing.

Villiers
Life Member
Life Member

Posts : 975
Join date : 2010-01-02
Age : 48
Location : Just outside Diss

http://www.rcoleplumbingservices.co.uk/

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by kevjhnsn on Sat Feb 22 2014, 20:55

Villiers wrote:Far as I know it's a ring of bolts and a bearing. remove the bolts and then prise it off the bearing.

villiers that is correct ,just i found that somtimes the studs bite into the cover a stop the removal ,i found removing the studs from 9 to 3 oclock can solve this issue ,and some i had to remove all but one before it was slidding smooth and even as you go
and keep rotating the shhaft incase it is also binding the job,think that was the smaller mk10-12 reductions though
kev

_________________
lol! " IF YOU DONT DO ANYTHING " "" YOU'LL NEVER MAKES MISTAKES "" lol!

kevjhnsn
Life Member
Life Member

Posts : 3598
Join date : 2011-02-10
Age : 38
Location : south cheshire

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by Gubble1234 on Sat Feb 22 2014, 21:43

I had trouble with mine, until I realised that there were two more nuts that I hadn't undone. I got it off, but those other two took the the studs and the threads out of the crankcase.

Luckilly, I was replacing the crankcase anyway! :P

Gubble1234
A true Stationary engine owner
A true Stationary engine owner

Posts : 119
Join date : 2014-02-15
Age : 21
Location : Newcastle Upon Tyne

https://www.flickr.com/photos/124784028@N05/

Back to top Go down

Sorted

Post by Slim on Sun Feb 23 2014, 21:31

I've got the cover off without too much damage (perhaps a new oil seal req'd) - I sort of assumed (never assume - mother of all f ups) the cover would lift off once the ring of small nuts on the studs were removed but the rear bearing closest to the crankcase is a press fit inner and outer into the gear housing (which itself is bolted with 4 bolts - 2 inside the gearcase and 2 outside) to the crankcase, so the only way to get the cover off is to hold the entire block and reduction gear combo, place the output shaft in a vice (with soft jaws) and using a hide face hammer drift the block away leaving the shaft / bearing, outer gear and cover in the vice, its a learning curve and this is another step.

Slim
Born to be wild
Born to be wild

Posts : 24
Join date : 2013-06-28
Location : Peterborough

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by Woodsman on Mon Aug 31 2015, 14:13

According to the Villiers Workshop manual:

"in addition to the holes for the fixing studs, are two tapped holes. Using two 5/16" Whitworth screws. the end cover can be withdrawn, but before doing this wrap with Sellotape the end of the shaft to protect the lip of the oil seal from damage by the keyway."

_________________
Regards Paul
Tha can alus tell a Yorkshireman - but tha can't tell him much.

Woodsman
Life Member
Life Member

Posts : 553
Join date : 2014-08-24

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by cancunia on Wed Dec 16 2015, 16:08

Woodsman wrote:According to the Villiers Workshop manual:

"in addition to the holes for the fixing studs, are two tapped holes. Using two 5/16" Whitworth screws. the end cover can be withdrawn, but before doing this wrap with Sellotape the end of the shaft to protect the lip of the oil seal from damage by the keyway."

Indeed there are. And by chance this is the same size as the threads on the studs that hold the fan cowling to the sump, and the petrol tank mounts to the engine block. And if like me you wonder why there are drops of water on the bench every time you stand the engine on the reduction belt pulley, stand back when you release the cover! Of course, there should actually be oil in there so best watch out in any case.

cancunia
Born to be wild
Born to be wild

Posts : 17
Join date : 2014-02-19

Back to top Go down

Re: Help please : Villiers MK20 Reduction Gearbox cover removal

Post by Sponsored content Today at 22:20


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum