The Classic Machinery Network

I’ve just joined this forum for help in replacing the axle seals on what I think is a Johnson 2F dumper, which is owned by my gliding club. The brakes had stopped working, and when I investigated I found the inside of the drums to be coated in oil. As it is a lever operated braking system this could only mean that the axle shaft seals have failed and need replacing. It looks straight forward enough but I wonder if there is someone who has done this, and could give some tips, and also give advice on where to buy spare parts.
I look forward to any responses.
Best wishes
Richard

Hi Richard welcome to the site I am sure somebody can point you in the right direction with this, just taking a guess here but you will need to remove the half shaft, also the brake linings should be replaced if they are contaminated with oil. There are specialist brake companies who can fit new linings to your old shoes, the seal should be standard from any decent seal supplier.
Don't forget to check the axle oil level and just as important that the breather is clean and clear from any obstruction.

Jeremy

Many thanks Jeremy

Jeremy Rowland wrote:Hi Richard welcome to the site I am sure somebody can point you in the right direction with this, just taking a guess here but you will need to remove the half shaft, also the brake linings should be replaced if they are contaminated with oil. There are specialist brake companies who can fit new linings to your old shoes, the seal should be standard from any decent seal supplier.
Don't forget to check the axle oil level and just as important that the breather is clean and clear from any obstruction.

Jeremy

as Jeremy says above

As long as you can get the old seals out relatively unscathed a good seal company should be able to cross reference off the numbers or measure up circumferences, I replaced the axle seal off a dumper but knew it was a Sherpa back axle! But I have just replaced the slew seals off a 1976 Hymac 370C and a company called master seal down here in South Wales were able to source suitable replacements the next day, Good Luck
Ian

https://simplybearings.co.uk/shop/Seals ... =Oil+Seals

I use Simply Bearings for my seals and bearings. Cheap as chips, and a huge stock range... Treat yourself to a cheap pair of digital calipers, about a fiver from Ebay, and you can measure the shaft and diameter of the seal you need.

As suggested, pull the shafts out, remove brake shoes and although there are brake lining cleaners out there they really only remove the surface oil and not deep down. A set of tractor brake shoes cost me around AU$35.00 with new rivets or send them off to the brake shop and they can bond new ones on for you. If you do fit new ones you will not believe how good new shoes are as they are nice and soft and grip well.
Any bearing shop will have the oil seals you need so remove one and if no number can be found then take the old seal along with your axle as the bearing shop can measure the OD of the old seal and the OD of the axle shaft where the seal runs.
It is important at this stage that you carefully inspect the surface of the axle where the new seal will run. Look for any grooves. If no grooves then use a bit of wet n dry paper and polish up the surface. If there is a groove don't worry buy some sleeves to fit the axle surface. There are many brands and they are all good.