The BSA A7-A10 Forum

Technical => Clutch, Primary, Gearbox => Topic started by: BigJim on 20.09. 2019 23:16

Title: Gearbox oil
Post by: BigJim on 20.09. 2019 23:16
What gearbox oil would you recommend for a swing arm gearbox?
Title: Re: Gearbox oil
Post by: berger on 20.09. 2019 23:25
I use straight 50 engine and box, buy it in 5 gallon drums quite cheap from Aztec oils and at the price can afford to change the engine oil every 800to 1000miles have done this for years even before Aztec oils I used to strap a 5 gallon of straight 50
 on the bike bought from the Belper depo refinery
Title: Re: Gearbox oil
Post by: morris on 21.09. 2019 21:45
What gearbox oil would you recommend for a swing arm gearbox?
*woo*
Another oil thread *smile*
Penrite’s Gearbox 30 is a good choice
https://www.penriteoil.com.au/products/gear-box-oil-30
Title: Re: Gearbox oil
Post by: duTch on 22.09. 2019 01:28

 Following on from The Owain hijack- I noted last night that the Tranny oil I've been using is Castrol EPX 90 that I bough about 10 years ago to change the oil in my Fourby but haven't quite gotten around to..... *conf2*

 I've had to drain the Beeza box a few times and each time generally intend to reuse the oil but end up using use fresh stuff because I get impatient waiting for the used stuff to settle in separate clear juice bottles......initially it had the 'brass glitter' which I attributed to new bushes but I think there may still be some glittery residue each change all settle fairly well, and which I'm still monitoring- when I find the samples *doubt*

 John CL- I'm sure you don't need me telling you how or why, but mine was also jumping out of third, and on investigating I found the dogs were all pointy so changed the gear and now is fine. I think it's actually an early box maybe from a longstroke (flat kicker spring) so if I recollect *all* the gears (or most) needed to change because they're different and wasn't sure if they should all be pointy because they were uniformly so... *dunno*

 not sure if I'm finished here, but stuff to do.......


Title: Re: Gearbox oil
Post by: bsa-bill on 22.09. 2019 09:24
Hold on folks "Glittery bits" suggest wear - particles being sheared off, not a chemical reaction to an oil additive, or am I missing something (not an entirely rare event)
Title: Re: Gearbox oil
Post by: berger on 22.09. 2019 13:40
bsa bill the additives in EP oils contain sulphur which starts to react with copper speeding up wear.
Title: Re: Gearbox oil
Post by: chaterlea25 on 22.09. 2019 13:54
Hi Dutch,
The gearbox was built from 99% NOS partss when I rebuilt it, that said 3rd was never quiet  *????*
Time will tell what problems lie inside it *????* *????*

John
Title: Re: Gearbox oil
Post by: RogerSB on 22.09. 2019 14:27
Have a look here. I've mentioned Westway Lubricants before.
See screen capture of the description which says yellow metal safe - can't be clearer.
https://www.ebay.co.uk/itm/5L-Classic-EP80w90-Gear-Oil-GL4-GL-4-80w-90-5-Litres/111669846650

(Edit): I suppose it depends on what EP oil you buy.
Title: Re: Gearbox oil
Post by: berger on 22.09. 2019 17:36
well it says its safe so it doesn't contain the additives of other EP oils . nice to know plenty people be happy with buying that *smile* I will still use 50 because MR Haynes says so. no not really because of Mr Haynes, because its cheap enough in a 5 gallon tub from aztec *good3*
Title: Re: Gearbox oil
Post by: Greybeard on 22.09. 2019 19:33
Have a look here. I've mentioned Westway Lubricants before.
See screen capture of the description which says yellow metal safe - can't be clearer.
https://www.ebay.co.uk/itm/5L-Classic-EP80w90-Gear-Oil-GL4-GL-4-80w-90-5-Litres/111669846650

(Edit): I suppose it depends on what EP oil you buy.
Thanks Roger, I've placed an order.
Title: Re: Gearbox oil
Post by: Minto on 28.09. 2019 03:29
Nice one Roger, the way my box has started leaking recently I’ll order a couple I think.
Title: Re: Gearbox oil
Post by: BigJim on 28.09. 2019 10:34
Me too.
Title: Re: Gearbox oil
Post by: lawnmowerman on 30.09. 2019 20:41
Thanks Roger.
They also do a SAE140 which will be ideal for my Sunbeam S7D rear drive with a bronze wormwheel. I currently use Castrol D which is about three times the price.
OK not a BSA but built under the same roof  *whistle*

Jim