Shibaura N843, Руководство по ремонту

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109823_2/09 5-15
b. Slide a piece of tubing of suitable size over shaft
against stop ring
) (see page 5-14, Fig. 5-28
and page 5-15, Fig. 5-29).
c. Then tap the tubing with a hammer to remove the
stop ring and expose snap ring
(see page 5-14,
Fig. 5-28 and page 5-15, Fig. 5-29). Remove the
tubing from the shaft.
d. Remove the snap ring and the stop ring and
separate the overrunning clutch
(see page
5-14, Fig. 5-28 and page 5-15, Fig. 5-29) from the
gear shaft
(see page 5-14, Fig. 5-28 and page
5-15, Fig. 5-29). If the snap ring is distorted, it will
be necessary to use a new one on reassembly.
Inspection
1. Armature
a. Inspect the armature coil for short-circuit with a
growler armature tester. Replace armature if
shorted.
b. Inspect armature coil for ground with a circuit
tester ( page 5-15, Fig. 5-30). Replace grounded
armature.
c. Inspect commutator for wear. If below the limit,
replace armature.
d. Inspect commutator for insulator depth. Correct if
below the limit.
e. Check gear teeth for wear or damage, and replace
armature as necessary.
2. Permanent magnets
a. Check permanent magnets for cracks, damage
and looseness, replace yoke assembly as
necessary.
3. Brushes
a. Check brushes for wear. Replace brushes if below
the limit.
b. Check brush spring pressure to make sure brush
moves smoothly in brush holder.
Fig. 5-29
Stop ring
Snap
ring
21
22
18
17
Fig. 5-30
Fig. 5-31
Hacksaw blade
Commutator
Commutator
0.02–0.03
Segment
No Good
Chamfered
(0.5–0.8mm)
Good
Insulation