Help! I am replacing the master/slave cylinder assembly in a '94 Jeep Wrangler. I have located the bleeder screw in the new assembly, however there is no screw! In the old assembly there is an allen screw, should I be using the old screw? Purchased the part from a dealer, called them back with this question and they didn't know!
This is not a bleeder hole, this is a weep hole like in a water pump to see when there is seepage past the seals.
Bench bleed the system. With the master cyl. line and slave cyl assembled, place the master cylinder in a vise, fill the master cyllinder. actuate the slave cylinder back and forth lower than the master cyl. This will allow the air to escape upwards back into and out of the master cyl.
Once bled the system can be installed.
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You wont need a photo its super easy, but it is under the jeep follow the line from resivior to the clutch master cylinder (holds fluid) then the other end located on the trannsmission is the slave cylinder the bleeder is on it usually has a rubber cap on it! hope this helps. p.s. dont let the resivoir get empty it will leave air in the system and make bleeding almost impossible.
leaky slave or master cylinder - if you have someone listen to the slave cylinder while you press the pedal is should "squelch" if there is air in there, if the slave cylinder doesn't make a squelching sound then the master cylinder or a hydraulic line between the two cylinders is leaking - slave cylinder isn't very expensive but the master cylinder can be rather pricey. and any good parts shop or motor-factor can source or make-up a new hydraulic line if it is the line itself that is leaking.
1. Fill master cylinder reservoir with DOT 3 brake fluid. Raise and support vehicle. Attach bleeder hose to bleeder screw on bleed line of slave cylinder. See Fig. 1 (attached in link) . Place other end of hose in glass container 1/2 full of brake fluid. Loosen bleeder screw while holding bleeder screw fitting.
2. Have an assistant depress clutch pedal to the floor. Tighten bleeder screw and release clutch pedal. Repeat bleeding procedure until fluid entering container is free of bubbles. DO NOT allow reservoir to run out of fluid during bleeding. Refill clutch master cylinder reservoir.
CAUTION: DO NOT allow bleed line to bend or flex when loosening bleeder screw.
If you have an internal slave cylinder check it for leaks or if an external slave cylinder check it for leaks. Check the back side of the master cylinder where it attaches to the firewall and see if the seals are leaking. If so replace the master or rebuild it. Same with the slave cylinder.
U have what is called a hydraulic clutch, one of the hydraulic cylinders hs failed, there is a master and a slave cylinder. The most likely and most common cylinder to fail is the slave cylinder, this requires the transmission to be pulled out to replace it. the art is around $125.00, while the trans is out u might as well replace the clutch, the labor is about the same. Here is a picture of the part, let me know if u can see it.