US 11,873,046 B2
Electrical method for centering telehandler rear wheels
Mir H. Azam, Mount Pleasant, WI (US); Javad Saberi Shakib, Greenfield, WI (US); Guy A. Moore, West Allis, WI (US); and Calvin Tyler, Yorkville, WI (US)
Assigned to ZOOMLION HEAVY INDUSTRY NA, INC., Yorkville, WI (US); and ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., Changsha (CN)
Filed by ZOOMLION Heavy Industry NA, Inc., Yorkville, WI (US); and ZOOMLION Heavy Industry Science and Technology Co., Ltd., Changsha (CN)
Filed on May 6, 2021, as Appl. No. 17/313,286.
Prior Publication US 2022/0355859 A1, Nov. 10, 2022
Int. Cl. B62D 7/15 (2006.01); B62D 7/14 (2006.01); B66F 9/075 (2006.01); B66F 9/065 (2006.01)
CPC B62D 7/1572 (2013.01) [B62D 7/142 (2013.01); B62D 7/1509 (2013.01); B66F 9/0655 (2013.01); B66F 9/0755 (2013.01); B66F 9/07568 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrical method for centering telehandler rear wheels, the telehandler including a front steering cylinder, a rear steering cylinder and a steering control unit, the steering control unit is connected to a hydraulic pump, comprising the steps of:
providing a steer mode valve having a 4W crab position, a 4W circle position, a 2W position and an intermediate position;
connecting said front steering rear cylinder and said rear steering cylinder to said steer mode valve;
providing an electronic control module that receives input from said at least one rear wheel sensor;
shifting said steer mode valve from either said 4W crab position or said 4W circle position into said intermediate position with said electronic control module;
detecting an angular position of rear wheels connected to the rear steering cylinder;
straightening the rear wheels by supplying hydraulic fluid to the rear steering cylinder; and
shifting said steer mode valve to said 2W position with said electronic control module.