SECTION 6 — HYDRAULIC BRAKE AND PARK BRAKE
SYSTEMS
6
Hydraulic Brake and Park Brake Systems
DANGER
• See General Warnings, Section 1, Page 1-2.
WARNING
• See General Warnings, Section 1, Page 1-2.
CAUTION
• Worn or damaged brake discs cannot be machined to refinish them. Replace as necessary.
GENERAL INFORMATION
The hydraulic service brake system consists of a master cylinder actuating dual piston front calipers and single
piston rear calipers.
The mechanical park brake system consists of a foot-operated pedal actuating a transmission-mounted caliper through
a single cable. The park brake disc is installed on the front output shaft of the transmission. Upon engaging the park
brake pedal, an indicator light illuminates in the dash panel.
BRAKE SYSTEM INSPECTION
See General Warnings, Section 1, Page 1-2.
The hydraulic brake system and park brake system should be inspected immediately after any service to either of
the brake systems.
BRAKE PEDAL INSPECTION
• When the brakes are applied during vehicle operation, the vehicle should come to a smooth, straight stop. If the
vehicle swerves or fails to stop, have the brake system checked and adjusted as required.
• Apply and release the brake pedal several times. If noise or binding occurs, the brake pedal or hydraulic brake
system may require service. Pedal movement should be smooth, and when the pedal is released, it should return
quickly and quietly.
• Move the brake pedal from side to side to check for worn parts. Excessive side movement indicates loose or worn
pedal mounting parts. If worn parts are found, replace the worn parts, then adjust the brake pedal.
Pedal Adjustment, Section 5, Page 5-3.
• Apply heavy pressure to the pedal and check for sponginess and excessive pedal travel. The pedal should be firm
and the back of the pedal should be a minimum of 1.25 inches (3.2 cm) from floorboard. Brake adjustment must be
maintained so the brake pedal cannot be pressed to the floorboard under any circumstance. If the brake pedal feels
“spongy,” perform the brake bleeding procedure.
See Bleeding the Hydraulic Brake System on page 6-18.
• Hold the brake pedal down with medium foot pressure (25 to 35 lb (11 to 16 kg)) for 15 seconds. The pedal should
not continue dropping when pressed with a steady amount of pressure. If the pedal goes to the floor, inspect the
hydraulic system for leaks and repair any worn or damaged components. After repair, bleed the hydraulic brake
system.
See Bleeding the Hydraulic Brake System on page 6-18.
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Page 6-1
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