Brake Lock Application Guide
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BRAKE LOCK APPLICATION GUIDE 2019 In addition to a well maintained and adjusted mechanical parking brake, experience has shown that in many uses, additional supplemental holding is necessary. This can be done in the form of wheel chocks, outriggers, or other means to keep all wheels that are in contact with the ground from moving. MICO® Hydraulic Brake Locks are ideal for use on vehicles with hydraulic brake systems. Typical uses are in the construction, mining, forestry, agriculture, material handling industries, multi-stop delivery vehicles, and recreational vehicles, such as motor homes and off-road 4-wheel drives. All MICO® Brake Locks are for supplemental brake holding and are to only be used in conjunction with a vehicle’s properly functioning mechanical parking brake. The brake locks use the vehicle’s service brakes as an operational supplement to the parking brakes and are not intended to be used as the primary parking brake or to be used for prolonged parking. Several types of brake locks are available for use in single, dual, split, or anti-lock brake systems. The type of brake system on the vehicle will determine which brake locks can be used. If you have questions about selecting the proper brake lock, please contact MICO. MICO, Inc. Form No. 80-950-152 Revised 2019-05-20 1

BRAKE LOCK PRODUCT LINE 691 Brake Lock System USER INTERFACE 691 Brake Lock Systems lock hydraulic pressure in the service brakes to supplement the vehicle’s original equipment parking brake and provide extra holding in heavy-duty and high frequency applications. These systems also function as an interlock to apply pressure to the service brakes when other vehicle mounted equipment is being used. The 691 System consists of a small electrohydraulic pump, remote mounted actuator (single and/or dual), electronic control module, and a small dash mounted user interface. The operator simply...

Dual Cable Lock Dual Cable Locks are cable operated and are designed to supplement a vehicle's original equipment parking brake by utilizing the hydraulic service brakes of a vehicle equipped with a dual or split braking system. Dual Cable Locks can provide 4-wheel lockup for hydraulic dual brake systems or rear wheel ABS, as well as 2-wheel lockup for hydraulic 3 and 4 channel ABS. Each Dual Cable Lock includes two low pressure warning switches. MODELS: 02-640-169 Includes - 3/16 and 1/4 inch fittings, 10 ft. cable - (BF) 02-640-202 Includes - 3/16 and 1/4 inch fittings, 10 ft. cable -...

DIFFERENT BRAKE SYSTEMS Typical hydraulic braking systems in use today vary depending on manufacturer and size of vehicle. For instance, a vehicle equipped with a single system may have a firewall mounted booster or possibly a frame mounted remote booster. The same holds true for the dual and split systems. The rear wheel anti-lock system is a dual brake system with an anti-lock valve installed. All-wheel anti-lock systems are defined as 3-channel or 4-channel systems (check the number of outlet lines from the anti-lock control valve). To be absolutely sure with which braking system your...

TYPICAL REAR WHEEL ANTI-LOCK SYSTEM Two independent braking systems. One system leads to the front brakes and the other system to the rear brakes. Identifying Feature: 1. Two lines from master cylinder. 2. Anti-lock control valve between master cylinder and rear wheels Lock Position: (1) Front Axle (2) Rear Axle (3) 4-Wheel IMPORTED TRUCK 3-CHANNEL ALL-WHEEL ANTI-LOCK SYSTEM Provides braking control by way of independent anti-lock channels for each rear wheel and a third channel for the front wheels. Identifying Feature: 1. Three separate air/hydraulic brake boosters. 2. One line to front...

+ With 4-channel ABS deleted, brake system type is Dual (Figure 2) NOTE: Vacuum/Hydraulic Boost = Vacuum assisted booster for hydraulic cylinder Hydraulic Boost Master Cylinder = Master cylinder driven by hydraulic booster powered by steering pump Best Choice ♦ Front wheel lockup only ■ Rear wheel lock up only 3-channel ABS

NOTE: Vacuum/Hydraulic Boost = Vacuum assisted booster for hydraulic cylinder Hydraulic Boost Master Cylinder = Master cylinder driven by hydraulic booster powered by steering pump iBest Choice ▲ On 3-channel ABS systems use 02-691-305 ■ Rear wheel lock up only 3-channel ABS

NOTE: Vacuum/Hydraulic Boost = Vacuum assisted booster for hydraulic cylinder Hydraulic Boost Master Cylinder = Master cylinder driven by hydraulic booster powered by steering pump iBest Choice ♦ Front wheel lock up only ▲ On 3-channel ABS systems use 02-691-305 NA Not Applicable ■ Rear wheel lock up only 3-channel ABS, front wheel only lockup use 02-691-223

+ With 4-channel ABS deleted, brake system type is Dual (Figure 2) NOTE: Vacuum/Hydraulic Boost = Vacuum assisted booster for hydraulic cylinder Hydraulic Boost Master Cylinder = Master cylinder driven by hydraulic booster powered by steering pump iBest Choice ♦ Front wheel lock up only ▲ On 3-channel ABS systems use 02-691-305 NA Not Applicable ■ Rear wheel lock up only 3-channel ABS, front wheel only lockup use 02-691-223

Medium Duty (T170-T370) Vehicle Application Aerial Lift Bucket Other Applications Model Year Brake System Type Service Brakes Miscellaneous Notes 4 Wheel 2 Wheel 4 Wheel 2 Wheel Medium Duty (Model 325-337) Model Year Brake System Type Service Brakes Miscellaneous Notes 4 Wheel 2 Wheel 4 Wheel 2 Wheel Medium Duty (Bullet CONV45-CONV55) Model Year Brake System Type Service Brakes Miscellaneous Notes 4 Wheel 2 Wheel 4 Wheel 2 Wheel Medium Duty (Actera 5500-7500) Model Year Brake System Type Service Brakes Miscellaneous Notes 4 Wheel 2 Wheel 4 Wheel 2 Wheel Tundra Model Year Brake System Type...

OFFSHORE MANUFACTURED Light Duty (Van & Cab-chassis) Vehicle Application Model Year Brake System Type Service Brakes Miscellaneous Notes 4 Wheel 2 Wheel 4 Wheel 2 Wheel Light Duty (W3500-W4500) also W5500 through 1998 model year Model Year Brake System Type Service Brakes Miscellaneous Notes Disc/Drum-Drum Vacuum/Hydraulic Booster F-disc/R-drum Vacuum/Hydraulic Booster Model Year Brake System Type Service Brakes Miscellaneous Notes Air/Hydraulic Boost with ABS on the air side. 4-channel ABS Vac/Hyd Vacuum/Hydraulic Booster, 2005-2007 HD is Hyd/Hyd. Model Year Brake System Type Service...