The 1984 Chevy S-10 Blazer utilizes a hydraulic clutch actuation system consisting of a clutch master cylinder mounted on the firewall and a slave cylinder mounted on the bell housing of the transmission. When the clutch pedal is depressed, fluid from the master cylinder moves into the slave cylinder which disengages the clutch. If the master or slave cylinder has been replaced or the fluid level in the master cylinder reservoir has dropped so low that air has been drawn into the system, the system must be bled through the slave cylinder.
Tools Used: Safety goggles, Jack, Jack stands, DOT3 brake fluid, Wrench set, 1/4-inch clear plastic, tubing (4 feet), 16 oz. glass jar, Shop rags
Bleed Slave Cylinder
Park the Blazer on a flat surface and set the parking brake.
Lift the front end with a jack and support it on jack stands. Place one jack stand under the frame on each side of the Blazer, just behind the front tires.
Locate the slave cylinder attached to the rear of the transmission bell housing on the driver's side. Use a box-end wrench to break the bleeder screw loose on top of the slave cylinder. Do not open the bleeder screw at this time.
Fill the clutch master cylinder with DOT3 brake fluid. The clutch master cylinder is located on the driver's side of the firewall next to the brake master cylinder.
Pour about 3 inches of brake fluid into a glass jar. Attach clear plastic tubing to the bleeder screw on the slave cylinder. Place the other end of the tubing into the glass jar. You can trim the plastic tubing if it is too long.
Instruct a helper to slowly depress the clutch pedal three or four times then hold the pedal down. Hold the tubing on the bleeder screw with one hand and with the other slowly open the bleeder screw about 1/2 turn with an open-end wrench. Air and brake fluid will come out. Close the bleeder screw.
Tell your assistant to refill the clutch master cylinder reservoir before any further bleeding takes place. The level of fluid in the master cylinder will go down every time you open the bleeder screw. Keep an eye on the fluid level in the master cylinder. Repeat this process until you do not see any air exit the slave cylinder when you open it then close the bleeder screw, remove the tubing and wipe up any fluid that may have spilled with a rag.
Check the fluid level in the master cylinder one last time and top it off if necessary. Raise the Blazer with the jack, remove the jack stands and lower the truck.
Tips & Warnings
Brake fluid is an eye and skin irritant. Be sure to wear eye protection. Wash hands with soap and water after finishing this procedure. Brake fluid also has solvent properties. Do not get brake fluid on painted surfaces.
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