Great Wall GW491QE, Руководство по обслуживанию

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ST-5
3. Check the diameter of rectifier
Standard diameter 30 mm
Min. diameter 29 mm
The rectifier needs to be changed if the actual diameter is less than Min.
value.
4. Check the depth of cutting groove
Check whether it’s clean or has foreign materials on the bottom of groove,
and whether the edge of groove is round and smooth.
Standard depth of groove (0.5 0.8)mm
Min. depth of groove 0.2 mm
If the depth of groove is less than Min. value, saw blades may be used
for a repair or correction purpose.
2. Check whether the excitation winding has been
grounded.
Use an ohmmeter to check whether non conduction exists between
excitation winding and the excitation frame.
The excitation frame needs to be repaired or changed if the conduction
works.
non-conduction
conduction
Rectifier
1. Check whether the surface of rectifier has been
contaminated or damaged by burning.
If it does occur, sand paper (No.400) or lathe may be used for a repair or
correction purpose.
2. Check the circumferential radial runout of rectifier
Max. circumferential radial runout 0.05 mm
Lathe may be used for a repair or correction purpose if the radial runout
exceeds Max. value.
Excitation winding (excitation frame)
1. Check whether the excitation winding is in an opened loop.Use
an ohmmeter to check whethe rconduction exis tsbetween the lead-
wire and the lead-wire of brush on excitation winding.
The excitation frame needs to be changed if the conduction fails.
Starting system-Inspection on starter
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