Mazda Trucks 1972-1986 Repair Guide

Slave Cylinder

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REMOVAL & INSTALLATION 1972-84 Vehicles



  1. Disconnect and plug the line at the cylinder.
  2.  
  3. On models through 1975, unhook the release lever return spring. On 1976 and later models, unhook the lever from the pushrod.
  4.  
  5. Remove the nuts and washers attaching the slave cylinder to the clutch housing.
  6.  
  7. Installation is the reverse of removal. Torque the mounting nuts to 12-17 ft. lbs. Fill and bleed the system.
  8.  

1986 Vehicles

  1. Raise and support the front end on jackstands.
  2.  
  3. Back off the flare nut on the fluid pipe to free the slave cylinder hose.
  4.  
  5. Pull off the hose-to-bracket retaining clip and pull the hose from the bracket. Cap the pipe to prevent fluid loss.
  6.  
  7. Unbolt and remove the slave cylinder.
  8.  
  9. Installation is the reverse of removal. Torque the bolt to 12-17 ft. lbs.
  10.  

OVERHAUL1972-84 Vehicles



See Figures 1, 2 and 3

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Fig. Fig. 1: 1972-78 piston engine clutch slave cylinder



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Fig. Fig. 2: 1979-84 clutch slave cylinder(1) Boot, (2) Release rod, (3) Piston assembly, (4) Spring, (5) Bleeder screw components



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Fig. Fig. 3: Rotary engine clutch slave cylinder

  1. Remove the cylinder.
  2.  
  3. Clean the outside thoroughly.
  4.  
  5. Remove the dust cover and release rod.
  6.  
  7. Remove the piston from the cylinder.
  8.  
  9. Disassemble the bleeder valve.
  10.  
  11. Discard any worn, damaged or distorted parts.
  12.  
  13. Clean all parts in clean brake fluid.
  14.  
  15. The cylinder bore may be honed to remove slight surface damage.
  16.  
  17. Assembly is the reverse of disassembly. Coat all parts in clean brake fluid prior to assembly.
  18.  

1986 Vehicles See Figure 4

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Fig. Fig. 4: 1986 clutch slave cylinder

  1. Remove the cylinder.
  2.  
  3. Clean the outside thoroughly.
  4.  
  5. Remove the dust cover and release rod.
  6.  
  7. Remove the piston from the cylinder.
  8.  
  9. Remove the return spring.
  10.  
  11. Remove the bleeder screw and the small steel check ball underneath it.
  12.  
  13. Discard any worn, damaged or distorted parts.
  14.  
  15. Clean all parts in clean brake fluid.
  16.  
  17. The cylinder bore may be honed to remove slight surface damage.
  18.  
  19. Assembly is the reverse of disassembly. Coat all parts in clean brake fluid prior to assembly.
  20.  

BLEEDING THE HYDRAULIC SYSTEM



See Figure 5

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Fig. Fig. 5: Bleeding the clutch hydraulic system is similar to bleeding the brake hydraulic system. Use clear plastic tubing hooked to the bleeder screw with the open end submerged in a catch can/bottle

The clutch hydraulic system must be bled whenever the line has been disconnected or air has entered the system.

To bleed the system, remove the rubber cap from the bleeder valve and attach a rubber hose to the valve. Submerge the other end of the hose in a large jar of clean brake fluid. Open the bleeder valve. Depress the clutch pedal and allow it to return slowly. Continue this pumping action and watch the jar of brake fluid. When air bubbles stop appearing, close the bleeder valve and remove the tube.

During the bleeding process, the master cylinder must be kept at least 3 / 4 full. After the bleeding operation is finished, install the cap on the bleeder valve and fill the master cylinder to the proper level. Always use fresh brake fluid, and above all, do not use the fluid that was in the jar for bleeding, since it contains air. Install the master cylinder reservoir cap.

 
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