JD brakes

[Sumpter 2]

I have a 4010 JD and the brake valve leaks. It leaks when not in use and the day time temperature gets into the upper 80's and higher. I have bled the brakes to get the air out and have replaced the cylinder rubber cups like those in a wheel cylinder. The brakes are good and solid and work fine, they are not soft. Any ideas.

 

[buickanddeere]

(quoted from post at 00:20:08 07/06/11) I have a 4010 JD and the brake valve leaks. It leaks when not in use and the day time temperature gets into the upper 80's and higher. I have bled the brakes to get the air out and have replaced the cylinder rubber cups like those in a wheel cylinder. The brakes are good and solid and work fine, they are not soft. Any ideas.

BRAKE VALVE OVERHAUL KIT
Cart KEY PART NO. PART NAME QTY MODEL NO. REMARKS
1 A3606R O-RING 2
2 R31455 GASKET 1
3 R32092 WASHER 2
4 R495R O-RING 2
5 R31469 SHIM 2
6 R31468 O-RING 2
7 R30903 O-RING 4
8 R26286 O-RING 2
9 R27137 BACK-UP RING 2
10 R27149 O-RING 2
Cart KEY PART NO. PART NAME QTY MODEL NO. REMARKS
11 R26287 O-RING 1
12 R28776 O-RING 1
13 R26375 O-RING 3
14 AR31946 BRAKE KIT 1 (SUB FOR AR30687)