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View Full Version : Brake adjuster Snails do not contact the post



jedwards
21st December 2023, 05:24 PM
I need some help, as I have no idea what I am doing wrong.
I have had repeated issues with leaking wheel cylinders and union pieces. As a result , but now believe I have resolved those issues.
As a result of brake fluid contaminating the linings, I changes the shoes for an older set that still had a workable amount of "meat" still on them. To my surprise, I found that the snail adjusters that I had bought from the Series 1 Shop about twelve months ago, did not contact the adjusting post, and rotated 360 degrees without ever touching the posts. I had read that some people overcome wear and tear in the snails by sipping an 8m, ID style tube over the posts, to give them extra width. In my case the snails have no apparent wear, and the issues is that the post is just too far from the post.

Now is not really possible, because there adjuster can only fit into the hole in the backing plate, and the shoes rotate around the central pivot and are help in position by the wheel cylinder and red return spring.

So I have obviously done something wrong and have no idea what. I can get the adjusters to work by playing a 8mm high-tension nut over the post, so that give an idea about how far out my setup is.

Has anyone come across this issues before and have some guidance and advice on how to fix it?

any help greatly appreciated.
regards
Jeff

whitehillbilly64
21st December 2023, 06:51 PM
Hi Jeff.
Crack the Bleed nipple and push the pistons back in, using the shoes at the top. Sound like the have crept out.
Don't think you would even get the Brake drums back on like this.
The 8mm tube allows the snail adjuster to push worn brake shoes out further into a worn drum. Not fill the gap.
I got my tubes from a S2 club member.

whitehillbilly

123rover50
22nd December 2023, 05:41 AM
Have you got the shoes back on the right way round. Not front to back, back to front etc. Put them side by side and see where the posts are.

B.S.F.
22nd December 2023, 08:41 AM
Are you using the correct adjusters ? LWB with 11" brakes use smaller snails.
.W.

jedwards
23rd December 2023, 09:25 AM
Are you using the correct adjusters ? LWB with 11" brakes use smaller snails.

Yes, I made sure I had the correct parts. I got a new set from Series One Shop and they are the same size as the old ones I had.

I'll keep exploring.
regards
Jeff

5380
26th December 2023, 11:20 AM
Are you using the correct adjusters ? LWB with 11" brakes use smaller snails.

Yes, I made sure I had the correct parts. I got a new set from Series One Shop and they are the same size as the old ones I had.

I'll keep exploring.
regards
Jeff


Jeff, did you fit new drums? If not measure your drums to see if they are not worn outside the maximum size of 10inches plus .030" wear. Grab a piece of 25 x 3mm flat bar, cut it to 10 inches long and round the corners off to make it easier to get into place. I have had the same problem on my 1953 80" caused by my drums worn to 10.060". Another symptom of worn drums is difficulty in bleeding and keeping a firm pedal. In the past brake drums were often skimmed out and oversize linings radius ground to fit, but some operators didn't pay much attention to wear limit specifications leading to problems later on. Seasons Greetings, 5380

Blknight.aus
26th December 2023, 12:10 PM
Check the backing plates aren't I the wrong way round (left to right)


Or the shoes haven't been built backwards.

jedwards
27th December 2023, 10:39 AM
Hi 5380,
No I did not fit new drums, but are looking at locating new ones as my next step. Does anyone know the ADB or Bendix Part Numbers? Prices range a great deal, so looking for the best value for money.

Regards
Jeff







Jeff, did you fit new drums? If not measure your drums to see if they are not worn outside the maximum size of 10inches plus .030" wear. Grab a piece of 25 x 3mm flat bar, cut it to 10 inches long and round the corners off to make it easier to get into place. I have had the same problem on my 1953 80" caused by my drums worn to 10.060". Another symptom of worn drums is difficulty in bleeding and keeping a firm pedal. In the past brake drums were often skimmed out and oversize linings radius ground to fit, but some operators didn't pay much attention to wear limit specifications leading to problems later on. Seasons Greetings, 5380

5380
3rd January 2024, 10:30 PM
Hi 5380,
No I did not fit new drums, but are looking at locating new ones as my next step. Does anyone know the ADB or Bendix Part Numbers? Prices range a great deal, so looking for the best value for money.

Regards
Jeff

Jeff, I just bought a set of 4 from 4WD Industries at Rutherford NSW. From memory they were about $83.00 each on a pre Christmas sale. Freight might be expensive to WA, unless there is a good samaritan heading you way. They are Allparts "Premium" brand and seem to be well machined. good luck! Be careful, there are 2 types of SWB 10" drums. One suits the earlier 9/16 BSF wheel studs and the other the later 16mm studs. Give them a call or email, they are great people to deal with. 5380