Keith_J
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Most of the replacement wheel cylinders didn't have cup expanders on the springs. The master cylinders also often have check valve breathers. The inferior wheel cylinders and check valve breathers work together to make wheel cylinders leak. Since wheel cylinders have an SMR code of PAOZZ, they are installed at the unit and worn ones thrown in the trash. This problem was never noted and corrected.
But because we source the parts, we can overhaul wheel cylinders for 1/10th the price! And the kits come with CUP EXPANDERS!!!! With DOT 5, wheel cylinders don't corrode. At the most, 30 seconds of honing. Even if you don't have the hone, buying one will have you in good brakes for less than buying new wheel cylinders.
Oh, that check valve breather? With changing temperature, pressure inside also changes. When the pressure drops, the wheel cylinder cups WITHOUT exapnders can loose seal, allowing brake fluid to leak. Dust and dirt follows, causing wear which makes the leak worse.
If your brakes fail in storage, application of air pressure through the hole in the master cylinder cap will reseat the cups, restoring brakes in minutes. Seconds if you have a battery operated tire inflator, fittings and hose. But definitely take that wheel off soon and service leaking cylinders. And get the overhaul kits with the expanders on the springs.
But because we source the parts, we can overhaul wheel cylinders for 1/10th the price! And the kits come with CUP EXPANDERS!!!! With DOT 5, wheel cylinders don't corrode. At the most, 30 seconds of honing. Even if you don't have the hone, buying one will have you in good brakes for less than buying new wheel cylinders.
Oh, that check valve breather? With changing temperature, pressure inside also changes. When the pressure drops, the wheel cylinder cups WITHOUT exapnders can loose seal, allowing brake fluid to leak. Dust and dirt follows, causing wear which makes the leak worse.
If your brakes fail in storage, application of air pressure through the hole in the master cylinder cap will reseat the cups, restoring brakes in minutes. Seconds if you have a battery operated tire inflator, fittings and hose. But definitely take that wheel off soon and service leaking cylinders. And get the overhaul kits with the expanders on the springs.