Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Brake Master Cylinder: Initial Inspection and Diagnostic Overview
Normal/Abnormal Conditions
The following conditions are considered normal and are not indications that the brake master cylinder is in need of service:
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Low brake fluid level detected without signs of leakage. This condition is caused by displacement of brake fluid from the brake master cylinder
reservoir into the disc brake calipers to compensate for normal brake wear. Add brake fluid as needed.
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A momentary or slight squirt of brake fluid from the brake master cylinder reservoir upon application of the brake pedal. This condition is caused
by brake fluid displacement through the brake master cylinder reservoir compensating port as the brake master cylinder pistons move forward in
the bore when the brakes are applied.
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Slight turbulence in the brake master cylinder reservoir fluid when the brake pedal is released. Turbulence occurs as brake fluid returns to the
brake master cylinder after releasing the brakes.
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A trace of brake fluid found on the outside of the power brake booster below the brake master cylinder mounting flange. This condition results
from the lubricating action of the brake master cylinder wiping seal.
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Changes in brake pedal feel or travel are indicator that something could be wrong in the brake system. Refer to the Symptom Chart for abnormal
condition diagnosis. See: Testing and Inspection/Component Tests and General Diagnostics
Cleaning and Inspection
Clean all brake master cylinder parts in clean isopropyl alcohol, or use a brake parts washer and inspect the parts for wear or damage. Replace them if
required. When a master cylinder repair kit is used, follow the instructions in the kit and install all of the parts provided.
