GROUP 3 TESTS AND ADJUSTMENTS GROUP 3 TESTS AND ADJUSTMENTS 1. PARKING BRAKE PERFORMANCE 1. PARKING BRAKE PERFORMANCE 1) 1) M EASUREMENT CONDITION EASUREMENT CONDITION (1) Tire inflation pressure : Specified pressure (2) Road surface : Flat, dry, paved surface with 1/5 (11 20' ) gradient. (3) Machine : In operating condition 20% gradient 11 20' 760F4BS17 2) 2) MEASURING PROCEDURE MEASURING PROCEDURE (1) Start the engine and drive the machine straight up a 1/5 gradient with the bucket unloaded. (2) Depress the service brake, place the gear selector lever in neutral, then stop the engine.
(3) Turn the parking brake switch ON, then slowly release the service brake pedal and the machine must be kept stopped. The measurement must be made with the machine facing either up or down the slope. 20% gradient 11 20' ц 760F4BS18 2. 2. ADJUSTMENT OF PARKING BRAKE ADJUSTMENT OF PARKING BRAKE (1) External brake inspection В Inspect for wear of brake pad (2) Refer to the PARKING BRAKE SYSTEM on the page 4-22. Lock nut Setting screw 7609A4BS27 4-39 Item Standard valve Parking brake performance Keep machine on 20% (11˚20') gradient