When the engine is started, the starting system in good condition, if the transmission is in neutral position, press the start switch, a starter sound but can not rotate the crankshaft, belonging to the mechanical fault. The causes of engine crankshaft failure and the diagnosis and repair methods are as follows.
The reason
Baotou beiben heavy truck fittings starter and flywheel gear meshing. The starter ring gear and the gear will collide when starting the engine, causing damage to the teeth or teeth of one side wear. If three or more consecutive teeth damage or wear, tooth starter gear and the gear ring to mesh.
Stick cylinder. The parking stall when the engine temperature is too high, it is difficult to dissipate heat, piston ring and cylinder adhesion under high temperature and after cooling can not start.
The crankshaft locking. The lubrication system failure or lack of oil caused by dry friction sliding bearings, eventually locking crank to start.
The plunger injection pump stuck.
The diagnosis and repair method
If the Baotou beiben heavy truck accessories flywheel has three or more consecutive tooth damage, and will lead to the opposite starter gear, two gear meshing can. In this state, only to turn a crowbar to pry the flywheel angle, and then press the start button to start smoothly. For damaged flywheel teeth, welding repair can generally be used.
The Baotou beiben heavy truck parts gear loose from the flywheel starter is installed at the mouth of confirmation. If the ring is loose, you must replace the new parts. In the installation, you should first put the ring in the heating box heating, and then hot pressed on the flywheel, cooling can be fastened on the flywheel.
When the tooth side of the gear ring is seriously worn, the gear ring can be pressed down, and the front end face and the back end face are turned on, and then loaded on the flywheel.
The examination of normal gear meshing, the flywheel rotation does not start, it should be regarded as the engine internal faults, such as crankshaft locking, piston stick cylinder, clutch card lag, which should be further observed. Can check whether or not the clutch stuck, and then check whether the fuel injection pump plunger and internal combustion engine, such as the failure of foreign bodies.