Inspection After Reassembly - Hitachi CM 4SB2 Technical Data And Service Manual

(6-2) Type II

8-3. Inspection after Reassembly

(1) Product accuracy
Runout of the diamond wheel: 0.6 mm maximum at the 100 mm dia. points
(2) Checking the insulation distance
Do not peel off the coating excessively at the connection of the internal wires. Do not get the internal wires in
the joint of the handle.
(3) Measurement of insulation resistance and dielectric strength
On completion of disassembly and repair, measure the insulation resistance and conduct dielectric strength
test.
Insulation resistance:
Dielectric strength:
(4)No-load current
After no-load operation for 30 minutes, the no-load current should be as follows.
110 V: 4.7 A maximum
Stator
Armature
7 M Ω or more
AC 4000V/1 minute, with no abnormalities
AC 2500V/1 minute, with no abnormalities
220 V: 2.6 A maximum
Switch
Cord lead wires
Fig. 13
Switch
Cord
Fig. 14
• • • • • • • • • •
• • • • • • • • • •
230 V: 2.4 A maximum
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Noise suppressor
Stator lead wires
Noise suppressor
220 V --- 240 V products
110 V --- 120 V products
240 V: 2.5 A maximum