Truck Parts and Service | Heavy Duty Trucking, Aftermarket, Service Info
Issue link: https://read.dmtmag.com/i/106601
Tech Updates TROUBLESHOOTING TRAILER LIGHTS DOT regulations state that any and all lights on a tractor must be in working order, including lights on a connected trailer. To make sure those lights are operating at peak ef���ciency at all times, you must check them periodically and perform regular maintenance. Below are tips from Phillips Industries on how to get lights working when they malfunction. Total Lighting Failure: No part of the system appears to be powered. Possible Causes: Burned out light bulb causing a break in the system; corrosion in harness, light plug or pigtail; ground problem; hydraulic lock from too much dielectric grease; bad spot in wiring harness; issues in the 7-way plug; issues from the tractor. Check to see if you have power at the 7-way of the trailer. - If there is no power there, check the back of the 7-way cable from the tractor. - If there is no power there, check the 7-way socket on the tractor. Check for a good ground. Check the condition of the 7-way connector. Check for a secure connection. Check to see if corrosion is present. SAFETY RECALLS Mack Trucks, Inc. is recalling certain model year 2013 CHU, CXU, GU, LEU, and MRU trucks, equipped with model number 90262, 90541, or 10073 Hayes Lemmerz steel wheels. Due to an inadequate weld between the wheel disc and rim, the disc can separate from the rim. Separation of the rim and tire from the vehicle can result in a loss of control and a vehicle crash. Hino is recalling certain model year 2005 through 2013 medium-duty trucks, models NA6J, NB6J, NC6J, ND8J, NE8J, NJ8J, NF8J, and NV8J, manufactured from Aug. 18, 2003, through Nov. 16, 2011. Over time, the main B+ circuit from the battery to the starter could potentially short to ground due to wear that accumulates as a result of interference between the B+ circuit and its convoluted tubing sheath. If the B+ circuit shorts to ground, it may lead to a ���re. Daimler Trucks North America is recalling certain model year 2007 Sterling 360 trucks manufactured from Jan. 25, 2006, through Jan. 22, 2007; and equipped with an EPA04 4M50 engine. The fuel lines may crack due to an improper manufacturing process. Additionally, the fuel pipe ���are nuts may have been insuf���ciently tightened. 10 T R U C K PA R T S & S E R V I C E | TPS0213_Tech Updates.indd 10 Single Lamp Failure: Problem appears to be isolated to one lamp. Possible Causes: Burned out light bulb; corrosion in harness, light plug or pigtail; ground problem; hydraulic lock from too much dielectric grease; bad spot in wiring harness; issues in the 7-way plug; issues from the tractor. Check the lamp with a lamp tester. - If the lamp functions, try re-installing it. If the lamp is not functional, move on to step two. With the power on, check the pigtail for continuity. The following are safety recalls issued by the National Highway Traf���c Safety Administration: Cracked fuel pipes or loose fuel pipe ���are nuts may leak fuel. A fuel leak in the presence of an ignition source may result in a vehicle ���re. lose engagement of the water pump, allowing the cooling system to overheat. This may result in exceeding temperature limits, potentially disabling the school bus. Daimler Trucks North America is recalling certain model year 2012 Cascadia and Coronado tractor trailers manufactured from Aug. 1, 2011, through Dec. 30, 2011, equipped with Thermo King TriPac Auxiliary Power Units (APU), serial numbers 3000106335 to 3000127584, manufactured from July 29, 2011, through Nov. 7, 2011. The maintenance access panel door on the bottom of the APU may dislodge and separate. If the door separates from the APU while the vehicle is being driven, it may create a road hazard for other drivers. Blue Bird Company is recalling Certain 2014 model year Blue Bird All American and Vision model school buses manufactured from March 18, 2012, through May 2, 2012, equipped with model number 90262 and 90541 Hayes Lemmerz steel wheels. Due to an inadequate weld between the wheel disc and rim, the disc can separate from the rim. Separation of the rim and tire from the vehicle can result in a loss of control and a vehicle crash. Daimler Trucks North America is recalling certain model year 2011 through 2013 Thomas Built school and non-school buses manufactured from March 2010 through July 2012, equipped with Cummins ISB6.7 diesel engines manufactured from Feb. 16, 2010, through May 4, 2012, containing a fan pulley, part number 3914462. The subject fan pulley is part of the accessory drive system on the front of the engine. The web of the pulley can fatigue over time, causing the pulley to fail. If this occurs, the fan belt may Blue Bird is recalling certain 2013 model year Vision conventional school buses manufactured from Aug. 27, 2012, to Nov. 6, 2012. The castle nut that attaches the drag link to the steering arm may not have been torqued to the proper speci���cations. Improperly torqued drag link castle nuts could cause excessive movement at the drag link to steering arm connection, which could lead to potential separation of the drag link from the steering arm and loss of steering control, which may increase the risk of a crash. February 2013 1/22/13 1:50 PM