Honda BF40D Manuel D'utilisation page 514

d. INSPECTION
• BRUSH LENGTH
Measure the brush length.
1
If the measurement is less than the service limit, replace the
breaker assembly or brush assembly as an assembly.
2
Standard
3
9.75 mm (0.384 in)
4
5
6
• ARMATURE
Check the armature for discoloration or damage, and replace it
7
with a new one if necessary.
8
Check the armature shaft for burrs, and correct it with a fine
emery paper if necessary.
9
Check the commutator surface for rust or damage, and correct
it with a fine emery paper if necessary.
10
11
12
Armature short-circuit test:
13
Place the armature on a V-block and hold a hacksaw blade
close to the armature core.
14
Check the armature by turning the core. If the hacksaw blade
15
attaches to the core or if it vibrates, it indicates the short-circuit
in the armature.
16 Replace the armature with a new one.
17
18
19
Test without using armature tester:
1) Check for continuity between the segments. If an open
20
circuit exists between any two segments, replace the
armature.
• If the resistance between the given segments is extremely
low compared to the resistance between the other
segments, there can be a short-circuit between the
segments caused by blockage with brush particles.
Remove the brush particles and recheck. If the resistance
is still extremely low, replace the armature with a new
one.
14-48
Service limit
5.5 mm (0.22 in)
514