106
SERVICE MANUAL FOR SGR19 & SGR17
Fig. 9-17
6) Inspection of the brushes
• Measure brush length in the middle.
Standard value Usable limit
15.0 mm 10.0 mm
8) Inspection of the brush holder
• Inspect for insulation across positive (+) side and
negative (-) side of the brush holder. If there is
no continuity, the brush holder is normal.
Fig. 9-18
• Correct the contact surfaces of the brushes on
the sandpaper wrapped around the commutator.
7) Inspection of brush spring tension
• Measure spring tension with a spring balance and
read the balance at the moment when the spring
is about to leave the brush.
Standard value Usable limit
1785 - 2415 gr 1200 gr
Fig. 9-19
Fig. 9-20
9) Inspection of the clutch
• Inspect the gear for wear and damage.
• Make sure that the gear locks when turned in
diving direction and turns smoothly in the re-
verse direction.
Fig. 9-21
• There should be no hitching when the bearing is
turned manually by applying some force to it
with fingers.
• It should not make abnormal noises when turned
abruptly.
Fig. 9-22
11) Replacement of the bearing
• Remove the bearing or install it as illustrated.
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