The fault of the diesel engine starter of the mortar spraying machine is mainly in the electromagnetic switch, common faults are: the movable iron core and the switch shaft, coil shell can not move flexibly after the match; The contact surface in the switch and the contact plate surface on the shaft are not smooth, ablative and cohesive; Short circuit and break of relay coil; Drive fork travel adjustment screw mortar spraying machine improper contact gap inappropriate.
Fault diagnosis method: press the start button, if the ammeter indicates discharge to zero, is the short circuit between the starter and the electromagnetic switch coil. Can remove the thin wire on the electromagnetic switch suspended, and then press the button, gradually find out where the iron; If the ammeter pointer does not move, after press the start button for the power switch and wire between electromagnetic switch circuit, electromagnetic switch is available with a screwdriver to make coil terminal with battery wire are interlinked, if has the suction for open circuit between terminal and the ignition switch, if use a screwdriver to make electromagnetic switch terminal after the mines with battery wire without electricity, for coil electromagnetic switch power, the need to overhaul repair. If you press the start button, the start machine rotation is good, there is no meshing noise, but the crankshaft does not turn, may be the electromagnetic switch back tail hook off, should be repaired.
If you press the start button, the electromagnetic switch suction, but the start machine does not turn, for the internal short circuit or conductive copper insulation gasket burn. Maintenance method is: if the diagnosis of electromagnetic switch fault, should be removed in a timely manner. The contact is ablated with the contact plate, so it should be polished to make the contact height consistent. Clean contact, remove oil; Strong welding, good contact; Insulation shall not be damaged, contact gap to mortar spraying machine appropriate; Relay coil shall not be broken, short circuit, when necessary to replace the new mortar spraying machine. The on-off state and on-off time of the main contact of the electromagnetic switch are controlled by the movable iron core, which is related to the clearance between the movable iron core and the contact disk push rod. The clearance is too small, and the main contact closes too early. When the commutator gear is not engaged with the flywheel gear ring, the main mortar spraying machine is conducted, and the drive pinion cannot engage with the flywheel and collide at high speed. If the clearance is too large and the power is late, the rear end of the pinion and the "top tooth" of the flywheel will be driven.
