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WIM-DA-002_B 

4.0 

INSTALLATION 

 

4.1 

Clean the friction surfaces of the brake rotor disc with an appropriate cleaning solvent to remove any oil and 
grease. 

 

4.2 

When installing a brake rotor disc that is running at elevated temperatures, it is important to allow for disc 
expansion and contraction, see section 

2.0 Specifications

 

 

WARNING: 

Failure to leave clearance for brake rotor disc expansion and contraction may result in premature failure.   

  

 

WARNING: 

The brake rotor disc and caliper brake are heavy.  Use appropriate equipment and procedures to prevent 
accident or injury. 

 

4.3 

Mount brake rotor disc using grade 8 hex head cap screws or socket head cap screws.  Tighten bolts 
evenly using a crisscross pattern. For bolts specifications see section 9.0

 Torque values.

 

 

4.4 

Mount caliper brake using grade 8 hex head cap screws or socket head cap screws.  For bolts 
specifications see section 9.0

 Torque values.

  Check to insure proper clearance between O.D. of the disc 

rotor and the inner caliper brake frame. 

 

IMPORTANT:

 Mounting foot used to mount the caliper bake on must be flat and square to the disc rotor face and strong 

enough to withstand the maximum torque generated by the brake caliper. 

 

4.5 

Refer to caliper brake illustrations and parts lists in the back of this manual, pages 10 and 11. 

 

4.6 

For initial adjustment of caliper brake: for adjustment see section

 6.0 MAINTENANCE.

 

 

4.7 

Air lines to the actuators should be sufficient size to allow quick response of the brake. 

 

4.8 

When installing a protective cover, ensure that air recirculation through the disc is not restricted.  Air 
pumped through the disc must be exhausted away from the disc to allow fresh cool air to enter the inner 
vent openings of the disc.  Back pressure should not be generated on the exhaust side of the disc. 

 

5.0 

OPERATION 

 

5.1 

Check to ensure friction linings do not contact the disc rotor when disengaged and are square to the disc 
rotor.  The clearance should be equally divided on both sides of the disc rotor. 
 

IMPORTANT:

 Friction linings must be burnished in order to achieve maximum brake torque. 

 

5.2 

Burnishing can be accomplished by engaging the caliper brake, using low air pressure, approximately three 
times for 10 to 15 minutes. 
 

NOTE: On some equipment it may not be possible to burnish the linings because of slow rotating speed and/or limited 

HP available. 

 

5.3 

In cold weather it is important to warm the disc rotor slowly to not cause excessive thermal stresses in the 
disc rotor.  
 
 

 

WARNING:  

Failure to warm the disc rotor slowly may cause instant disc failure.  

 

 
 
 

Summary of Contents for WDA-26

Page 1: ...Caliper Brake Ductile Iron Version Installation Maintenance Manual WPT Power Corporation 1600 Fisher Road Wichita Falls TX 76305 P O Box 8148 Wichita Falls TX 76307 Ph 940 761 1971 www WPTpower com...

Page 2: ...7 Air lines 5 0 OPERATION 6 6 1 Clearance inspection 6 2 Burnish friction linings 6 3 Disc warm up in cold weather 6 4 Air applied spring release actuator 6 0 MAINTENANCE 7 7 1 Air applied caliper br...

Page 3: ...injury insure that adequate lifting devices and hand tools are available WARNING Read these instructions thoroughly and review until you fully understand all warning and hazards before proceeding with...

Page 4: ...150 860 710 710 630 570 NOTE All fasteners must be SAE Grade 8 or better 2 2 When running at elevated temperatures allow adequate mounting holes clearance for disc to expand and contract during operat...

Page 5: ...the outside diameter of the brake rotor disc see sketch below Rotate the disc 360 degrees The indicator reading should not exceed 0 015 inches 0 38 mm T I R 3 3 Check Brake Rotor Disc Concentricity M...

Page 6: ...ted by the brake caliper 4 5 Refer to caliper brake illustrations and parts lists in the back of this manual pages 10 and 11 4 6 For initial adjustment of caliper brake for adjustment see section 6 0...

Page 7: ...s must be replaced before hardware contact the disc rotor 6 6 Replace friction lining by removing cotter pins nuts and shoe rod holding shoe assembly to the lever Remove bolts holding outer bearing an...

Page 8: ...r bearing to the shoe assembly 7 5 Remove cotter pins nuts and saddle rod holding levers to the caliper brake 7 6 Remove tie rod nuts and lock washers from tie rods 7 7 Remove saddles and spacers from...

Page 9: ...CAP SCREWS Grade 8 BOLT SIZE As Received Lubricated IN INCHES LB FT LB IN Nm LB FT LB IN Nm 1 4 8 100 11 6 80 9 5 16 17 200 23 13 160 18 3 8 30 360 41 24 288 32 7 16 48 570 64 38 456 51 1 2 83 990 112...

Page 10: ...of 12 WIM DA 002_B 10 0 ACTUATOR ASSEMBLY DRAWING AND PARTS LIST Item Description Item Description 1 End Cap 7 O Ring 2 Spring 8 HHCS 3 Guide Pin 9 Nut 4 Nut 10 Diaphragm 5 Plate Diaphragm 11 Plug 6...

Page 11: ...COTTER 24 PIN CLEVIS 3 BALANCING LINK 14 SHCS 25 PIN 4 WASHER FLAT 15 SADDLE ROD 26 PIN COTTER 5 SHCS 16 WASHER FLAT 27 SPACER 6 BALANCING LINK 17 NUT 28 SADDLE 7 KIT RELINE 18 PIN COTTER 29 FOOT 8 SH...

Page 12: ...ained as follows o No exposure to rainwater o Temperatures 32F 0C to 110F 43C o Below 50 average humidity o Average sunlight Hazards that require addition protection o Dust and debris o Oil water salt...

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