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Disc & Drum: Other Subaru Forester SF

Mechanical - Hydraulic 5 illustrations ~681 words

BLEEDING PROCEDURES

Ensure joints and connections of brake system do not leak. Bleed air from brake system in sequence. See BRAKELINE BLEEDING SEQUENCE table. Time interval between release and depression of brake pedal during bleeding should be 3-4 seconds. Open brake cylinder bleeder screw for 1-2 seconds on every pressure stroke.

ApplicationSequence
Except SVXRF, LR, LF, RR
SVX(1) HP, (1) HS, RF, LR, LF, RR
(1) HP (hydraulic unit primary bleeder between LF and RR); HS (hydraulic unit secondary bleeder between RF and LR). See appropriate ANTI-LOCK article.
(1)HP (hydraulic unit primary bleeder between LF and RR); HS (hydraulic unit secondary bleeder between RF and LR). See appropriate ANTI-LOCK article.

BRAKELINE BLEEDING SEQUENCE

BRAKE PEDAL HEIGHT & FREE PLAY

  1. Adjust brake pedal height using brake power booster operating rod. On Legacy, pedal height is 6.22" (158.0 mm). On Impreza and Forester, pedal height is 5.83" (148.0 mm). On SVX, pedal height is 5.51" (140.0 mm). See «MASTER CYLINDER PUSH ROD»(ref-121756-S05462685732001090500000).
  2. Adjust brake pedal free play using stoplight switch. Adjust free play to.04-.12" (1.0-3.0 mm). (Scheme 9) DO NOT rotate stoplight switch. Tighten stoplight switch lock nut to 4.4-7.2 ft. lbs. (6-10 N.m).

Scheme 9

Scheme 9
Scheme 9

Scheme 10

Scheme 10: Legacy
Scheme 10: Legacy
  1. Before adjusting hill-holder Pressure Hold Valve (PHV) cable, ensure clutch pedal and clutch release fork free play are within specification. See «CLUTCH PEDAL FREE PLAY»(ref-121756-S31763616142001090500000) table.
  2. Inspect clutch pedal free play by hand. Adjust clutch free play by turning adjusting nut on engine side of clutch cable at release fork. (Scheme 10) CLUTCH PEDAL FREE PLAY Measured At In. (mm) Clutch Pedal.39-.79 (10.0-20.0) Clutch Release Fork.12-.16 (3.0-4.0) NOTE: Hill-holder may not activate on less than a 3-degree incline.
  3. Check stopping and starting performance by activating hill-holder on an uphill road with more than 3-degree incline. If hill-holder PHV releases brakes after clutch is released (causing engine to stall), go to step 4). If hill-holder PHV releases brakes before clutch engages (vehicle slips downhill), go to step 5).
  4. If hill-holder releases too late (engine tends to stall), loosen PHV cable and adjust it at clutch release fork in small increments until smooth starting is possible. (Scheme 11)and (Scheme 12).
  5. If hill-holder releases too early (vehicle slips backward slightly), overtighten cable until vehicle tends to stall. Adjust cable at clutch release fork in small increments until smooth starting is possible.
  6. When turning adjusting nut, ensure PHV cable does not turn. PHV assembly is not serviceable. If necessary, replace assembly.

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

MASTER CYLINDER PUSH ROD

With engine off (no vacuum to booster), free play should exist between operating rod clevis pin and brake pedal. (Scheme 9) If free play does not exist, loosen operating rod lock nut and adjust free play. Pedal free play should be 0.04-0.12" (1.0-3.0 mm).

PARKING BRAKE

  1. Remove adjusting hole cover from rear wheel backing plate. Using flat blade screwdriver, turn brake adjusting screw star wheel until shoes make snug contact with drum surface of rotor and wheel will not turn. Back off adjusting screw star wheel 3-4 notches.
  2. Turn wheel to ensure brake shoes do not drag. If shoes drag, back off shoe adjustment a few more notches. Install adjusting hole cover to rear wheel backing plate.
  3. With service brakes properly adjusted, pull parking brake lever 3-5 notches. Raise vehicle on hoist. Loosen lock nut at parking brake cable equalizer. Turn adjusting nut until clearance is 0-.02" (0-.5 mm). (Scheme 13) Hold adjusting nut and tighten lock nut.
  4. Lower vehicle, but keep tires off ground. Release parking brake lever. Rotate front wheels and pull parking brake lever using 44 lbs. (20 kg) of force. Wheels should lock when handle is pulled up 6-7 notches. Readjust parking brake if needed.

Scheme 13

Scheme 13
Scheme 13

POWER BRAKE UNIT

  1. Start engine, run it 1-2 minutes, and then turn it off. Depress brake pedal several times using normal pedal force. Each time pedal is depressed, pedal height should increase. While brake pedal is depressed, start engine. Pedal should move slightly toward floor. Continue to hold brake pedal down and turn off engine.
  2. Continue to hold brake pedal down longer than 30 seconds. Brake pedal height should not change. If pedal goes slowly upward, a vacuum leak exists in power brake system. Inspect brake vacuum check valve for proper operation. If check valve is okay, replace power brake unit.

FRONT DISC BRAKE PADS

Note. DO NOT disconnect hydraulic line from caliper. DO NOT press on brake pedal after caliper has been removed.

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