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THE SINGLE-SERVO / DUO-SERVO DIFFERENCE:
- SINGLE-SERVO: Single plunger coming from the wheel cylinder, most commonly used with Surge Brake applications.
- DUO-SERVO: Two plungers coming from the wheel cylinder, stops vehicle in both forward and reverse motion.
SELECTING HYDRAULIC BRAKE PARTS:
- Determine the size of your brake.
- Measure the diameter of the mounted brake shoe.
- Measure the width of the lining.
- Determine the manufacturer of your brake.
- Is the manufacturer's name on the backing plate?
- Compare to complete Brake Assembly or to exploded drawings in this catalog.
- Select each part you need. The exploded drawings of each brake are to assist you in
selecting the parts you need. Though all parts may be shown, we carry replacement
parts only for those that are numbered. Parts labeled "Parts Only" indicate that
complete brake assemblies are not available.
REASONS WHY BRAKE HARDWARE SHOULD BE REPLACED:
- Worn, weak return springs will cause the brake linings to drag against the drum and
cause premature brake failure.
- Hold down springs will lose their tension and allow the brake shoes to wobble or
ride up against the face of the brake drum, causing premature lining failure.
- A frozen adjusting screw will not allow shoes to be adjusted properly.
- Rubber dust plugs will crack with age and allow dirt to contaminate
linings. (not shown or illustrated)
- A stretched self-adjusting cable or worn lever prevents the self-adjusting
lever from properly aligning the shoes. (not shown or
illustrated)
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