Insulation Tests; Deflection Of Saw Blade; Cleaning The Case - Hitachi C 6MFA Technical Data And Service Manual

(8) Tightening torque values for selected fasteners
Bolt (W/Washer) M7 x 17.5 [14] ............................................................... 9.8
Seal Lock Screw (W/Sp. Washers) M6 x 14 [65] ..................................... 2.9
Seal Lock Flat Hd. Screw M5 x 12 [4] ...................................................... 3.4
Seal Lock Flat Hd. Screw M3 x 12 [10] .................................................... 1.8
Machine Screw (W/Washers) M4 x 10 [16] .............................................. 1.8
Machine Screws (W/Washers) M5 x 45 [17] ............................................ 3.4
Machine Screw M5 x 12 [37] .................................................................... 3.4
Hex. Hd. Tapping Screws D5 x 55 [47] .................................................... 2.9
Tapping Screws (W/Flange) D4 [18] [46] ................................................. 2.0
Hex. Socket Set Screws M5 x 6 [34] ........................................................ 2.0
Brush Caps [42] ....................................................................................... 0.7
Hex. Socket Set Screws M5 x 8 [39] ........................................................ 0.7
Flat Hd. Screw M6 x 20 [52] ..................................................................... 0.7
Seal lock hex. socket hd. screw M6 for Sleeve [58] ................................. 3.4
Set screws M3.5 x 7.5 for Switch (2P Pillar Type) W/Safety Lock [55] .... 0.3
Cap Nut M10 [33] ..................................................................................... 7.8 to 9.8 N

8-3. Insulation Tests

On completion of disassembly and repair, measure the insulation resistance and conduct dielectric strength test.
Insulation resistance: 7 M Ω or more with DC 500 V megohm tester
Dielectric strength: AC 4000 V/1 minute, with no abnormalities

8-4. Deflection of Saw Blade

Allowable deflection level of the saw blade shall be as follows.
C 6MFA, C 7MFA

8-5. Cleaning the Case

When the unit becomes soiled, clean it with a clean soft rag moistened with soapy water. Since chloric solvents,
gasoline and thinner tend to melt plastic material, their use for cleaning is absolutely avoided.
Model Measuring point Allowable level
150
0.3 mm max.
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2.0 N m 100 20 kgf
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0.5 N m 30 5 kgf
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0.7 N m 35 7 kgf
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0.4 N m 18 4 kgf cm
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0.4 N m 18 4 kgf cm
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0.7 N m 35 7 kgf
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0.7 N m 35 7 kgf
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0.5 N m 30 5 kgf
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0.5 N m 20 5 kgf
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0.5 N m 20 5 kgf
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0.2 N m 7.5 2.5 kgf
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0.2 N m 7.5 2.5 kgf
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0.2 N m 7.5 2.5 kgf
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0.7 N m 35 7 kgf
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+ 0.07 + 0.75
N m 3 kgf cm
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-- 0.05 -- 0.5
m 80 to 100 kgf
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