Are Rear Discs Worth It?
The stock master cylinder on most rigs works well, but some models have a residual check valve in the rear outlet port. Take the line off and use a toothpick to probe inside the port. If you feel a spring-loaded disc inside the port, the master cylinder has this check valve, which must be removed. A small sheetmetal screw can be screwed into the brass port and then pulled out with a pair of pliers. After removing the spring and the disc, take the screw out of the port and reinstall it with a small punch, being careful not to damage the soft brass. Then reattach the brake line. It’s usually best, and easiest, to replace the master cylinder with one designed for a four-wheel-disc application and to use an adjustable proportioning valve to fine-tune the system. View Related Article
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