BRAKES

TM-5-3820-256-24-3 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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contain a sizeable amount of asbestos, it is important that people who handle brake linings be aware of the problem and know the precautions to be taken. b. Areas where brake work is done should be set aside, if possible, and should be posted with an asbestos exposure sign as follows: ASBESTOS DUST HAZARD AVOID BREATHING DUST WEAR ASSIGNED PROTECTIVE EQUIPMENT DO NOT REMAIN IN AREA UNLESS YOUR WORK REQUIRES IT BREATHING ASBESTOS DUST MAY BE HAZARDOUS TO YOUR HEALTH c. OSHA standards should be consulted with respect to mandatory requirements as well as for suggested procedures to minimize exposure. (Reference: Title 29, Code of Federal Regulations, Section 1910.1001.) 3-4.2 Brake Inspection and Adjustment a. A regular schedule for periodic cleaning, lubrication, adjustment and inspection should be established, based on the type of vehicle operation. Refer to lubrication and maintenance guide intervals, Chapter 4. It is difficult to predetermine an exact maintenance interval (time or mileage), since vehicles will be used in a wide variety of applications and conditions. b. Periodic checking of push rod travel or brake adjustment is essential for good braking. Push rod travel should be checked every 2,000 mi. (3 000 km) to determine if adjustment is necessary. Vehicles with automatic slack adjusters should also be checked to ensure proper operation of the adjuster mechanism at the 2,000 mi. (3 000 km) interval. Push rod travel should be kept at a minimum without brakes dragging. c. Inspect brake lining every 12,000 mi. (19 000 km) or every 12 months, whichever occurs first. Inspect more often during periods of severe service oepration or considerable stop-and-go operation. When brake lining or blocks are worn to within 1/16 inc. (1.6 mm) of rivets, brake lining must be replaced. d. Once a year, the entire brake system must be inspected. (1) Rubber may deteriorate wherever it is used. Rubber brake components should be inspected by a competent mechanic and replaced as necessary. Replacement intervals will vary according to the severity and length of service. (2) Condition of drums, brake chambers and slack adjusters. (3) Air leaks. (4) Hose or pipes for rust, damage, deterioration. (5) Operation of service and parking brake. 3-3

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