Truck Parts and Service | Heavy Duty Trucking, Aftermarket, Service Info
Issue link: http://read.dmtmag.com/i/510247
12 Tech Updates W ebb Wheel has released a technical bulletin offering advice for removing frozen brake drums. Webb Wheel describes a frozen drum as a drum that has corroded and molded together with hub pilot pads. When removing a drum in this situation, the company says it is important to follow a simple set of instructions to ensure technician safety and minimal component damage. Webb Wheel describes its steps as follows: Apply corrosion penetrant between the drum and hub mating surfaces. Allow enough time for release of frozen joint. Use the proper tool to remove the brake drum (there are many devices available designed to remove brake drums, such as jaws, clamps and drum pullers). While this removal process can be more costly up front, Webb Wheel says the added cost to acquire the appropriate tool for removing stubborn brake drums will save money in the long run. The company also notes any drum that has been impacted in order to "break it loose" during removal should be replaced with a new Webb drum. T R U C K P A R T S & S E R V I C E | M a y 2 0 1 5 TIPS FOR REMOVING FROZEN BRAKE DRUMS SAFETY RECALLS Blue Bird is recalling certain model year 2013- 2016 All American A3FE, A3RE, T3FE, T3RE, and D3RE school buses manufactured June 28, 2012, to Sept. 25, 2014, and 2013-2016 Vision BBCV school buses manufactured June 9, 2012, to Sept. 30, 2014. Incorrect fasteners may have been used to secure the seat gusset reinforcement to the side wall resulting in the seat belts being improperly anchored. As such, these vehicles fail to comply with the require- ments of Federal Motor Vehicle Safety Standard (FMVSS) No. 210, "Seat Belt Assembly Anchor- ages." If the seat belts are improperly anchored, there is an increased risk of occupant injury in the event of a crash. Daimler Trucks North America is recalling certain model year 2015 Freightliner Cascadia, Business Class M2, 108SD, 114SD, 122SD, Coronado, Western Star 4700, and Western Star 4900 trucks manufactured Oct. 6, 2014, to Feb. 16, 2015, and equipped with Haldex Life Seal brake chambers. The affected vehicles may experi- ence brake drag due to an improperly seated diaphragm in the brake chamber. While traveling at highway speeds, brake drag may cause loss of vehicle control, increasing the risk of a crash. DTNA is recalling certain model year 2014- 2015 Western Star 4700, 4900, 5700, and 6900 trucks manufactured from July 23, 2013, through Dec. 4, 2014, and equipped with certain Kidde disposable handheld fi re extinguishers. These fi re extinguishers may not fully discharge as designed when the lever is repeatedly pressed and released. In the event of a fi re, if the fi re extinguisher does not work correctly, there is an increased risk of injury to the truck occupants. Mack Trucks is recalling certain model year 2012-2015 CXU trucks manufactured Feb. 4, 2011, to Dec. 23, 2014, and equipped with an air release fi fth wheel latch. The affected vehicles have a switch to release the fi fth wheel latch that may inadvertently be pushed and cause the trailer to unintentionally disconnect from the tractor after the parking brake has been released. An inadvertent decoupling of the trailer from the tractor may increase the risk of a crash. Mitsubishi Fuso Truck of America is recalling certain model year 2014-2015 FEC72 vehicles manufactured Nov. 8, 2013, to Jan. 28, 2014, and 2012-2015 FEC92 vehicles manufactured April 22, 2011, to Feb. 1, 2014. On the affected vehicles, the lower engine timing chain bolt may have been insuffi ciently tightened during as- sembly. A timing chain bolt that was not properly tightened may result in an engine oil leak, pos- sibly causing the engine to seize, increasing the risk of a crash. Motor Coach Industries (MCI) is recalling certain model year 2007-2010 MCI E4500 and J4500 motor coaches manufactured Nov. 21, 2006, to August 27, 2009, and equipped with certain Recaro Automotive Seating Ergo M bus driver seats. The affected seats were manufactured in a way that the tether bar may push into the retractor panel door and potentially interfere with the seat belt locking mechanism. If the seat belt locking mechanism does not function as intended, the bus driver may not be properly restrained, increasing the risk of personal injury in the event of a crash. Navistar is recalling certain model year 2015- 2016 International 9900, DuraStar, LoneStar, PayStar, ProStar, WorkStar and 2015 Interna- tional TranStar and IC Bus CE vehicles equipped with a Haldex air braking system. The affected brake actuators may have been manufactured with an incomplete attachment of the internal rubber diaphragm to the actuation mechanism. This could cause dragging or overheated brakes. If the brakes drag and overheat there is an increased risk of a wheel end fi re. Navistar is recalling certain model year 2015- 2016 IC RE school buses manufactured Nov. 4, 2014, to Dec. 23, 2014. In the affected vehicles, the air brake hose for the front wheel service brakes may contact the tires when the steering is fully turned. Contact with the tire may result in hose abrasion, resulting in an air leak, causing the vehicle to pull to one side when braking and/ or requiring extra distance to stop the school bus. Either condition may increase the risk of a crash. Paccar is recalling certain model year 2015-2016 Kenworth T680 and T880 trucks manufactured Nov. 17, 2014, to Jan. 5, 2015. The affected vehicles are equipped with Meritor MT-40-14X rear drive axles that may circulate an inadequate amount of lubricant to the wheel end hub assembly. Without adequate lubrication to the wheel end hub assembly, the bearings may fail prematurely, increasing the risk of a wheel-end fi re or crash. The following are safety recalls issued by the National Highway Traffi c Safety Administration: