• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

TR2/3/3A New Wheel Cylinder too large

tr3guy

Member
Country flag
Offline
I stripped the threads on one of the rear wheel cylinders on TR3A s/n 68000. I bought 2 new cylinders to replace both old ones. The new cylinders (catalog # 580-025, Classic Gold) are .025" larger between the flat piston end and the stationary end than on the old wheel cylinder (old 1.565", new 1.590"). The new, larger cylinders cause the brake shoes to be in full contact with the brake drum, even with the adjuster fully retracted. I am using the same brake shoes and brake drum that were being used with the old cylinders. The shoes are slightly worn, and the drums have been turned. With the old cylinders, the wheels turned freely, even without the adjuster being fully retracted. With the new cylinder, it takes force to turn the wheels. Has anyone had this problem? This is a total brake rebuild, so all lines are dry, and the parking brake disconnected. I would be interested in buying a rebuildable used Girling cylendar, casting #304170, 3/4" piston with flat piston end to use with my one good original cylinder.
 

TomMull

Luke Skywalker
Silver
Country flag
Offline
I just put rear cylinders from Moss last week. No issues although I didn't measure them. Are you sure they are not stuck in the backing plate? They should slide freely. I don't think the .025 would make any difference.
Tom
 

TR3driver

Great Pumpkin - R.I.P
Offline
Just a thought, have you tried measuring/swapping pistons?

I've probably got some old ones, but chances are that the bore is corroded. And resleeving will probably cost more than new ones.
 
OP
tr3guy

tr3guy

Member
Country flag
Offline
Shawn, the invoice # is 5-454322. I have a conversation going with Bill, but we haven't resolved the issue. Thanks for checking.
 
OP
tr3guy

tr3guy

Member
Country flag
Offline
Thanks Randall. That's a good idea. The two pistons are the same length so I swapped the new piston into the old cylinder. The new piston's seal rides lower on the piston than seal on the old piston, and the bottom of the bore in the old cylinder is machined a little different than the new cylinder (the old has a little ledge). So the seal on the new piston bottoms out on the little ledge on the old cylinder, leaving the piston sticking out too far. The supplier is working on the problem, but if we can't get it resolved, we may have to strike a deal if you have one of the old cylinders. Thanks, again.
 
OP
tr3guy

tr3guy

Member
Country flag
Offline
Tom, the cylinder slides freely on the backing plate, and the locking plates have been greased. I cleaned the adjusters, and that did make a difference. Before cleaning, the drum wouldn't go on, after cleaning it went on with a tight fit. So far, the .025 difference is the only difference between the two cylinders that I can find. Thanks for your input.

Jims
 

TomMull

Luke Skywalker
Silver
Country flag
Offline
Tom, the cylinder slides freely on the backing plate, and the locking plates have been greased. I cleaned the adjusters, and that did make a difference. Before cleaning, the drum wouldn't go on, after cleaning it went on with a tight fit. So far, the .025 difference is the only difference between the two cylinders that I can find. Thanks for your input.

Jims
Good that you cleaned the adjusters. The wedge on one of mine was frozen. What I don't understand is he .025. Mine took quite a few turns to get the shoes to contact the drums and that was with new shoes. The adjusters move each shoes at least .25 so it would seem that such a small size difference alone is not the issue.
Tom
 
Similar threads
Thread starter Title Forum Replies Date
Healey Nut Rear Wheel Cylinder Mounting Austin Healey 4
Kurtis TR4/4A Rear wheel brake cylinder replacement Triumph 1
AUSMHLY BJ8 Rear Wheel Cylinder leaking Austin Healey 30
K TR2/3/3A Rear brake wheel cylinder attachment again Triumph 1
A TR2/3/3A Wheel cylinder issue? Triumph 0
J TR4/4A TR4A rear wheel cylinder source Triumph 3
R Freeing wheel cylinder locking plate Austin Healey 7
RickPA BJ8 rear wheel cylinder install Austin Healey 1
trotti Pulling off the rear wheel cylinder Austin Healey 11
D TR4/4A Wheel Cylinder Backing Springs Triumph 11
S Wheel cylinder installation kit Austin Healey 2
T TR2/3/3A TR3 Rear wheel cylinder attachment clips Triumph 6
C TR4/4A TR4A wheel cylinder install Triumph 4
TulsaFred Bugeye rear wheel cylinder replacement tips Spridgets 10
hondo402000 TR6 New rear wheel cylinder leaking, TR6 Triumph 0
T Wheel cylinder fitting kit - any tips? Triumph 4
RickB Wheel cylinder failure Spridgets 17
T 76 midget rear wheel cylinder Spridgets 5
B rear wheel cylinder C clip install?? ugh Spridgets 24
G What's up with this wheel cylinder hole boot? Triumph 10
5 one inch rear wheel cylinder Austin Healey 1
R HELP! Wheel brake cylinder clip MG 9
D Rear wheel cylinder replacement question BT7 Austin Healey 6
Stinger TR4/4A TR4A Rear Brake Wheel Cylinder Dust Shields Triumph 5
R Austin healey BJ& rear wheel cylinder problem. Austin Healey 4
athenssprite removing wheel cylinder Spridgets 2
R BJ-7 rear wheel cylinder removal Austin Healey 4
19_again Leaky wheel cylinder MG 8
Twosheds Jensen-Healey Wheel Cylinder Other British Cars 2
T Wheel cylinder identifier Triumph 11
MGretired Rear wheel cylinder retaining clip MG 9
Banjo wheel cylinder cross refrence??? Jaguar 3
J Rear Wheel Cylinder Removal Spridgets 3
6 Wheel Cylinder Fluid leak on BJ8 Austin Healey 7
W clogged wheel cylinder Austin Healey 8
S Front Wheel Cylinder Woe's Austin Healey 15
C TR2/3/3A TR2 Axle/wheel bearing removal Triumph 2
G On Car Wheel Balancer Restoration & Tools 5
steveg SOLD!! Moto-Lita 14" wheel Triumph Classifieds 0
steveg SOLD!! Moto-Lita 14" wheel for sale with adjustable hub & collet Austin Healey Classifieds 0
Z 3000 Front Wheel Bearings Austin Healey 3
J TR2/3/3A Adjustable vs non Adjustable wheel Triumph 0
Cappy Moto-Lita Steering Wheel Installation Austin Healey 3
F For Sale Wheel Trim Rings Triumph TR6, $95.00 Triumph Classifieds 0
F TR6 Wheel spacers Triumph 4
Hamish Racing General Tech Wheel and tyre selection Triumph 11
RJS General TR Wire Wheel Spline Question Triumph 3
T Wedge TR7 4 speed wheel cylinders on 5 speed (locating pin) Triumph 0
K TR2/3/3A Steering Wheel hold down Nut Triumph 6
K TR2/3/3A Greasing the Front Wheel Hubs? Triumph 9

Similar threads

Top