WABCO PAN 17 Assembly And Maintenance Instructions
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WABCO PAN 17 Assembly And Maintenance Instructions

Mechanical sliding caliper disc brake
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WABCO Mannheim
Mechanical Sliding Caliper Disc Brake
Type PAN 17
Assembly and Maintenance Instructions
W ABCO Radbremsen GmbH
Postfach 71 02 63 – D-68222 Mannheim
Bärlochweg 25 – D-68229 Mannheim
+49 (0)6 21/48 31-0
+49 (0)6 21/48 31-300
FAX
LEYLAND / DAF - Edition 12/2000

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Summary of Contents for WABCO PAN 17

  • Page 1  WABCO Mannheim Mechanical Sliding Caliper Disc Brake Type PAN 17 Assembly and Maintenance Instructions W ABCO Radbremsen GmbH Postfach 71 02 63 – D-68222 Mannheim Bärlochweg 25 – D-68229 Mannheim +49 (0)6 21/48 31-0 +49 (0)6 21/48 31-300 LEYLAND / DAF - Edition 12/2000...

  • Page 2: Table Of Contents

    Renewing Guide Pin Gaiters and Bushes Renewing Adjuster Screw Gaiter Checking / Renewing Brake Discs Renewing Brake Cylinder Table 1: Spanner Widths [AF] and Tightening Torques [Nm] Explosive Diagram of the PAN 17 Replacement Parts LEYLAND / DAF - Edition 12/2000...

  • Page 3: Description Of The Mechanical Sliding Caliper Disc Brake

    Disc Brake PAN 17 Description of the Mechanical Sliding Caliper Disc Brake The „PAN“ Brake is a Floating Caliper Disc Brake, designed for installation on front and rear axles in trucks or buses as a Service, Emergency and Parking Brake. The brake is actuated mechanically via a Diaphragm or Spring Loaded Cylinder which is mounted directly to a cover on the brake caliper, resulting in a relatively short overall axial length and compact brake package.
  • Page 4 Disc Brake PAN 17 Fig. 2 Plan View and Section Fig. 3 Side View and Section LEYLAND / DAF - Edition 12/2000...

  • Page 5: Service Instructions

    No serviceable parts are inside the clamping unit. Only original and genuine WABCO Service Parts and approved brake pads are to be used. With newly installed brake pads avoid emergency stops and long braking cycles during the first 50 km to prevent excessive temperatures.

  • Page 6: Checking Brake Function

    Disc Brake PAN 17 Checking Brake Function Caution: Do not use a power-driven socket! Keep hands and fingers out of the inside of the caliper to avoid injury! 2.2.1 Checking Air Gap: Work Sequences Figures • Loosen and remove hex head bolt 39 from hold down hoop 38.
  • Page 7 Disc Brake PAN 17 Work Sequences Figures The free space between closed end wrench and caliper housing must be large enough so that there will be no interference when the adjuster rotates! Important: Do not use power tools or an open end wrench on the hex nut 22 of the adjuster.

  • Page 8: Checking Brake Pads

    Disc Brake PAN 17 Checking the Brake Pads Notice: The brake pad thickness is to be checked regularly dependent on operating conditions during maintenance intervals and under applicable local laws and regulations. Burned, glazed or oil contaminated brake pads must be replaced immediately.
  • Page 9 Disc Brake PAN 17 Work Sequences Figures Brake Disc Condition Inspection: Check brake disc for cracks, condition of rubbing surfaces maximum wear dimension. A = Crazing = permissible B = Radial cracks max. 0.5 mm (width) = permissible C = Unevenness under 1.5 mm = permissible...

  • Page 10: Renewing Brake Pads

    Disc Brake PAN 17 Renewing Brake Pads Caution: Do not use a power-driven socket! Keep hands and fingers out of the inside of the caliper to avoid injury! Working Sequences for Removal of Pads: Work Sequences Figures • Separate the electrical connector (arrow) and remove plug.
  • Page 11 Disc Brake PAN 17 Work Sequences Figures • Remove plug 12 for the adjuster 22 from the caliper 1. • De-adjust the brake by rotating the hexagon on the adjuster nut 22 with a ring spanner, Detail then release by c. 1/4 turn.
  • Page 12 Disc Brake PAN 17 Work Sequences Figures • Using a wire brush remove any corrosion from the spreader plate, brake pad slot, and spreader plate and brake pads guide surfaces. Caution: Take care not to damage the dust caps (gaiters) 5, 10. The guide surfaces must be free of grease! Fig.
  • Page 13 Disc Brake PAN 17 Work Sequences Figures • Check the adjuster according to Section 2.2.2. Caution: Prevent the adjuster screw turning by e.g. holding the pin (arrow) during the test and whilst rotating the adjuster hexagon. • Check the brake discs according to Section 2.4.
  • Page 14 Disc Brake PAN 17 Work Sequences Figures • Insert new brake pad 35 into the wheel side. • Using a 1 mm thick feeler gauge (arrow) inserted between the backing plate of the brake pad on the wheel side and the brake...
  • Page 15 Disc Brake PAN 17 Work Sequences Figures • Slide new hold down hoop 38 through opening in cable guide and openings in the brake caliper, then push downward so that the radial corners of the hold down springs snap into the hold down hoop.

  • Page 16: Renewing Brake

    Disc Brake PAN 17 Renewing Brake Caution: Do not use a power-driven socket! Keep hands and fingers out of the inside of the caliper to avoid injury! Note: The new brake is supplied as a pre-assembled unit. Caution: Observe left (Illustration A) and right (Illustration B) brake configurations. Do not...

  • Page 17: Renewing Gaiters

    Disc Brake PAN 17 Work Sequences Figures • Dismantle the caliper with the carrier from the axle (Table 1, Position III). • Check brake pads according to Section 2.3. • Check brake disc according to Section 2.4. Fig. 36 Work Sequences for Installing Brake:...

  • Page 18: Renewing Guide Pin Gaiters And Bushes

    Disc Brake PAN 17 Renewing Guide Pin Gaiters and Bushes Work Sequences for Removal: Work Sequences Figures • Remove brake pads according to Section 3. • Remove brake cylinder from the brake caliper by releasing cylinder nuts (Table 1, Position V).
  • Page 19 Disc Brake PAN 17 Work Sequences Figures • Place the caliper 1 on a firm base to push out the bushes 4, so that the caliper opening is facing upwards. Fig. 43 • Press the bushes 4 out of the caliper 1 using a mandrel.
  • Page 20 Disc Brake PAN 17 Work Sequences Figures • Fit new gaiters 5 in the gaiter seats in the caliper 1. Note: Clean gaiter seats before fitment and lubricate gaiter lip lightly to ease fitment. Ensure that the gaiters are fitted evenly and...
  • Page 21 Disc Brake PAN 17 Work Sequences Figures • Move brake caliper backwards and forwards on guide pins 8, 9 several times. Check for ease movement. Caution: Do not squeeze guide pin gaiters against brake caliper. Fig. 50 • Lubricate the bores for the caps 11 in the brake caliper 1.

  • Page 22: Renewing Adjuster Screw Gaiter

    Disc Brake PAN 17 Renewing Adjuster Screw Gaiter Note: If the gaiter only is to be renewed it is not necessary to dismantle the brake caliper and cylinder. Work Sequences for Removal: Work Sequences Figures • Remove brake pads and spreader plate according to Section 3.
  • Page 23 Disc Brake PAN 17 Work Sequences for Installation: Work Sequences Figures • Clean the gaiter 10 seat (arrow) in the caliper (Shown in Figure without adjuster screw). Fig. 58 • Push the new gaiter 10 over the adjuster screw. Centralise the fitting tool on the gaiter...

  • Page 24: Checking / Renewing Brake Discs

    Disc Brake PAN 17 Checking / Renewing Brake Discs Checking Brake Disc Check the disc according to Section 2.4. If the wear limits are reached, renew the disc as described in the following Section. Renewing Brake Disc Caution: It is generally recommended that, upon installation of a new brake disc or after the disc has been machine turned, new brake pads be installed.

  • Page 25: Renewing Brake Cylinder

    Disc Brake PAN 17 Renewing Brake Cylinder Caution: Do not use a power-driven socket! Keep hands and fingers out of the inside of the caliper to avoid injury! Note: Only use cylinders as specified by vehicle manufacturer. Removing the Brake Cylinder:...
  • Page 26 Disc Brake PAN 17 Removing the Spring Loaded Cylinder: Work Sequences Figures • Block vehicle to prevent rollaway. • Release hand brake. • Retract mechanical release. • Set hand brake. Caution: line connection Pressureless • Mark both air lines for correct reinstallation.
  • Page 27 Disc Brake PAN 17 Work Sequences Figures • Position brake cylinder on brake caliper and tighten mounting nuts with wrench in a crosswise fashion. Observe tightening torque values specified by cylinder supplier. • Connect both brake lines to brake cylinder and tighten.
  • Page 28 Disc Brake PAN 17 Table 1 Position Spanner Width Hexagon Tightening Torque [AF] [Nm] external internal Turning direction of hexagon: Adjust, anti-clockwise (left), maximum 3, air gap decrease. De-adjust, clockwise (right), maximum 12, air gap increase. Do not use a power-driven socket! 20 ±...

  • Page 29: Explosive Diagram Of The Pan 17 Replacement Parts

    Disc Brake PAN 17 Explosive Diagram of the PAN 17 Replacement Parts Legend: Brake Caliper Plug Guide Pin Bushes Brake Pad with Wear Sensor, Wheel Side Guide Pin Gaiters Brake Pad with Wear Sensor, Actuation Side Internal Hexagon Bolt (long)

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