RL V6-3.7L (2009)
Brake Master Cylinder: Service and Repair
Master Cylinder Replacement
NOTICE
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Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid gets on the paint, wash it off immediately with water.
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Be careful not to damage or deform the brake lines during removal and inspection.
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To prevent the brake fluid from flowing, plug and cover the hose ends and joints with a shop towel or equivalent.
NOTE: When you apply the silicone grease, make sure not to get any on the terminal part of the connectors and surrounding switches. Also, do not touch
the switches and the terminal part of the connector with hands or gloves that have silicone grease on them.
1. Lower the vehicle to the ground.
2. Remove the covers (A) in the engine compartment.
3. Remove the under-hood fuse/relay box, and move it aside. See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and
Repair/Under-Hood Fuse/Relay Box Removal and Installation
4. Remove the strut brace. See: Body and Frame/Frame/Structural Brace/Service and Repair
5. Remove the reservoir cap and brake fluid from the master cylinder reservoir with a syringe.
6. Disconnect the brake fluid level switch connector (A).
7. Disconnect the brake lines (B) from the master cylinder (C). To prevent spills, cover the line joints with rags or shop towels.
NOTE: Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
8. Remove the master cylinder mounting nuts (D) and washers.
9. Remove the master cylinder from the brake booster (E). Be careful not to bend or damage the brake lines when removing the master cylinder.
10. Remove the O-ring (F) from the master cylinder.
11. Install the master cylinder in the reverse order of removal, and note these items:
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Before installing the master cylinder, check the brake booster pushrod clearance. See: Power Brake Assist/Vacuum Brake
Booster/Adjustments
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Replace the O-ring whenever the master cylinder is removed.
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Coat the O-ring with shin-etsu silicone grease.
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Bleed the brake system. See: Brake Bleeding/Service and Repair
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Check the brake pedal height and free play after installing the master cylinder, and adjust it if necessary.
12. Bleed the brake system. See: Brake Bleeding/Service and Repair
13. Spin the wheels to check for brake drag.
