D250 3/4 Ton Pickup 2WD V8-360 5.9L VIN 5 4-bbl (1988)
Wheel Cylinder: Service and Repair
Cleaning and Inspection
Fig 2 Rear Wheel Cylinder 11 And 12 Inch Brakes
1. With brake drums removed, inspect the wheel cylinder boots for evidence of a brake fluid leak.
2. Block brake pedal in stroke position.
3. Visually check the boots for cuts, tears, or heat cracks.
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If any of these conditions exist, the wheel cylinders should be completely cleaned, inspected and new parts installed.
NOTE: A slight amount of fluid on the boot may not be a leak, but may be preservative fluid used at assembly.