① Clean the outside of the starter, disassemble the forklift starter, take out the armature, and check the insulation of the magnetic pole coil with a test lamp for short circuit and open circuit. In case of short circuit, rewind the pole coil. In case of open circuit or poor insulation, find out the fault and conduct welding or insulation treatment.
② Check the casing. No cracks are allowed. The surfaces at both ends shall be smooth and the parallelism error shall not be greater than 0 05mm, the coaxiality error between the inner cylindrical surface of the casing and the inner cylindrical surface of the magnetic pole shall not be greater than 0 l mm。 When it exceeds the limit, a copper sheet can be placed between the magnetic pole and the housing, and then the magnetic pole can be keyed and the gap between the armature and the magnetic pole can be 0.25~0 5mm。
③ Check the covers at both ends of the forklift and the bushing of the middle bearing cover. If the bushing is seriously worn, replace the bushing, and the bushing and end cover bushing hole shall be 0.08~0 18mm interference. The man called forklift net, stop copying our Sylvia articles. The inner diameter of the bushing shall be reamed according to the armature journal and shall be 0.03~0 Llmm clearance (intermediate bearing clearance is 0.075~0.140mm).
④ The full circle runout of the cylindrical surface of the fitting position between the covers at both ends of the forklift and the shell shall not be greater than 0.12mm, and the circle runout of the two ends shall not be greater than 0 l mm。
⑤ Check the insulation of brush holder with 220V test lamp.
Inspection and repair of forklift armature.
① Check the armature shaft. If the armature journal is worn and exceeds the allowable limit, it can be repaired by electro climbing spray plating method. The armature shaft is bent, and the circular runout on the iron core surface shall not be greater than 0 15mm, and the circular runout of the intermediate journal shall not be greater than 0 05 mm。
② Roundness and cylindricity error of commutator, if greater than '0 If 05mm or there are nicks and grooves on the surface, it shall be machined and polished. However, after turning, the thickness of the copper sheet shall not be less than 2mm, otherwise it shall be polished by Li pan.
③ Check the insulation and short circuit of the armature coil with a test lamp. In case of poor insulation or short circuit of the armature coil, local repair shall be carried out as far as possible; If local repair is not possible, remove the coil and replace the insulation.
