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Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 8:39 am
by Pict
Did my first gearbox grease fill last night. With the tin on the trusty garage hotplate for ages, it was way too hot to touch without the welding gloves but other that at the bottom and the sides, the grease was still pretty cool and gloopy, and that's quite a small filler hole to get gloop through!

Enter a large plastic syringe, purchased from eBay ages ago as it 'looked useful' - previously used to prime a new brake system with fluid and also to fill modern fork legs with accurately measured amount of fork oil.

Just the job! It drew up the hot grease with no problem and fitted in the filler hole taking a fraction of second to scoosh the lot in. A few syringe fulls and the job was done.

Test run tonight. Finger crossed (see my 'oil leak' thread)

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 12:07 pm
by Alan R
Nice one !! --- well done on the "originality" front ......

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 4:03 pm
by Barry_Q
I've been doing this for a year or so now. I bought a cake syringe from Ebay and I use that to fill the gearbox. It looks like one of those mastic cartridge syringes (stainless steel too). Fill up the syringe and then squeeze the handle. Jobs a good-un.

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 5:33 pm
by Dean
why not just put sealed bearings in the gearbox and run 90 weight gear oil? put the Hitchcocks aftermarket bearings in my 4 speed gearbox - shifts smoother and absolutely No leaks.

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 6:18 pm
by Riggers
I used a small plastic funnel when filling my box with hot liquefied grease. All was going well until I realised that the funnel was slowly melting into the gearbox! I finished the job off with a metal funnel, but the box seems to work perfectly on a mixture of 'oo' grade grease and chewed up plastic funnel! Tony.

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 6:42 pm
by Norm
I got caught with a box I put sealed bearings in last week, put oil in it and it started leaking straight away. Had to pull it down again and knock the layshaft bush out and give it the Loctite treatment. Should have done it in the first place. Didn't fall for that one again yesterday when I replaced the bearings on the Super Meteor box

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 7:02 pm
by Dean
Norm, used bearing fit to seal to the case - guess it worked, because it is sealed tight - no leaks. but then again maybe I just got lucky for once.

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 8:54 pm
by Alan R
Hi guys--------- using Loctite to bond the outer edge of the seal is a bit drastic I think...On the MoD APC's and MBT's semi-Auto gearboxes we used Welseal on both faces....Makes a bead on front and rear edges as the seal is fitted..... Also easy to remove the next time around ( Usually about 18 months time )...http://www.ebay.co.uk/itm/Stag-Wellseal ... arsParts_V ---------

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 9:11 pm
by Bertie the Bullet
I always mix the grease with 20/50, makes a nice sludge, just right for poring down the filler and won't leak out of my oil-seal-less gearbox.

Gearbox Filling - Teaching you to suck eggs?

Posted: Thu Oct 17, 2013 10:06 pm
by Leon Novello
I`m too scared to look at my Bullet`s gearbox grease after all the noises I`ve heard from it over the years.