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Warren/Fenner: Failure to take into consideration the compression forces and outward forces generated when using locking devices. The mounted component must have sufficient wall thickness to withstand the outward forces or it will burst. Likewise when mounting on hollow-shaft or tubular applications. Inadequate wall thickness results in the hollow shaft or tube being compressed and distorted. Many manufacturers publish a formula or table that lets designers calculate the required wall thickness.Vic/Rimtec: Having too much clearance between the shaft and hub is often a problem; you can''t clamp enough to transmit rated torque. Overtightening the screws is also common, causing tapers to lock when they''re supposed to disassemble. This is where locking devices with push-off screws come in handy. Jeff/KTR: Prevent rust and make sure fasteners are tightened to the specified torques after a minimum operation time. Replace the device if it starts to slip. Reconfirm the selection, and be sure to check the dimensions and surface finish of the bore and shafts.Doug/Zero-Max: Keep the connection screws properly torqued for maximum holding forces, and use a connection with a minimum number of adjusting screws.Jim/Stafford: daytonhydraulicpump Replace socket screws when sockets become worn. Don''t use wrenches with rounded corners. Don''t use a screwdriver to spread collars, or a hammer to move them along a shaft.Keith/U.S. Tsubaki: Higher quality locking devices are practically maintenance-free. There is no need to periodically retighten locking bolts or replace the unit, even in high-vibration applications. End users can extend service life even longer by keeping exposed surfaces clean and corrosion free. Test results on one inspection of 1,520 tractor and trailer combinations revealed that 46% of these vehicles had brakes that were out of adjustment. The remaining OOS vehicles were cited for such defects as audible air leaks, cracked brake drums, loose brake components, brake daytonhydraulicpump linings not firmly attached to the shoe, brake lining less than one-quarter-inch daytonhydraulicpump thick, brake lining saturated with oil or grease, and damaged or frayed air line hoses or tubing.Interpreting brake termsBefore attempting to specify an air brake system for articulated vehicles, let''s define certain brake terminology so that the vehicle manufacturer, equipment dealer and truck fleet manager are all on the same frequency of communication:Balanced Braking. This daytonhydraulicpump would daytonhydraulicpump occur on a tractor trailer combination when the brakes'' forces are divided evenly between the tractor and the trailer, or trailers. The trailer brakes would apply just before the tractor brakes and the tractor brakes would release just before the trailer brakes. In other words, every brake in the vehicle combination would be contributing to its designed share of the total braking effort. Also, balanced braking prevents trailer sluing (when the trailer wheels lock and go into an uncontrollable skid), as well as tractor jackknifing.
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