Author Topic: Gearbox drain plug  (Read 388 times)

Offline RoyC

  • Wise & Enlightened
  • *
  • Join Date: Mar 2017
  • Posts: 1102
  • Karma: 7
Gearbox drain plug
« on: 10.05. 2017 11:25 »
I have had difficulty getting any kind of spanner on the G.B. drain plug (28-0243) because there is very little of the head showing.
I am toying with the idea of using a 5/16", UNC BUTTON HEAD BOLT so that I can get an allen key on it.
How long is the drain plug bolt ?
or, does anyone know of another alternative ?
Thanks,
Roy.
My bike is a 1958 A7SS
Staffordshire UK

Offline duTch

  • Ricketty Rocketty Golden Flashback
  • Wise & Enlightened
  • *
  • Join Date: Oct 2011
  • Posts: 4540
  • Karma: 41
Re: Gearbox drain plug
« Reply #1 on: 10.05. 2017 11:43 »

 The thread is not very long,  maybe 1/2"? (WW.)spanner size 1/4 or 5/16ww of which you no doubt aware...being a slightly domed head I understand your dilemma.
 Sometimes I wonder if  it's packed with  a rubber  'O' ring  or washer or two might help  *dunno*
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline Topdad

  • bob hebdon
  • Wise & Enlightened
  • *
  • Join Date: May 2011
  • Posts: 2242
  • Karma: 32
  • l
Re: Gearbox drain plug
« Reply #2 on: 10.05. 2017 12:20 »
I agree the bl@@dy thing is awkward but my main problem is getting it back in ( as the churus girl said to the vicar ) !! Last time I lost best part of an hour trying to relocate it ,could alonger bolt be fitted or will that foul the kick start mech ??
" rules are made for the guidance of wise men and the blind obediance of fools"
United Kingdom

Offline duTch

  • Ricketty Rocketty Golden Flashback
  • Wise & Enlightened
  • *
  • Join Date: Oct 2011
  • Posts: 4540
  • Karma: 41
Re: Gearbox drain plug
« Reply #3 on: 10.05. 2017 13:04 »

 
Quote
...,could alonger bolt be fitted or will that foul the kick start mech ??

  Maybe not with the kick-start Bob, bit that bit is not the issue...it's more the head size/ mechanical advantage of the drive that is the issue
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online JulianS

  • 1962 A10
  • Wise & Enlightened
  • *
  • Join Date: Mar 2017
  • Posts: 1009
  • Karma: 20
Re: Gearbox drain plug
« Reply #4 on: 10.05. 2017 15:47 »
Easiest to use a bolt/screw with full sized head.

Those 1/2 thickness original style bolts are not very user friendly.

You need a 5/16 x 18 tpi BSW x 1/2 inch length bolt.

You can then sit it in a socket and offer it up to the gearbox.