Lubrication; Screw Tightening Torque; Insulation Tests; No-Load Current Value - Hitachi W 4YD Technical Data And Service Manual

8-3. Lubrication ... See Fig. 10.
[29]
[30]
(1) Grease applied: Nippeco SEP-3A (Code No. 930035)
(2) Greasing locations
(a) Fill a proper amount of grease (about 7 g) in the gear box of
housing (A).
(b) Pinion of the Armature [56]
(c) Shaft of the gear shaft of the Final Gear and Gear Shaft Set [38]
(d) Teeth and clutch of the Final Gear and Gear Shaft Set [38]
(e) Inner circumference and the clutch of the Clutch Disc [36]
(f) Inner and outer circumferences and the clutch of the Socket [35]

8-4. Screw Tightening Torque

(1) Tapping Screw (W/Flange) D4 [12] [69] ............................................................... 1.96
(2) Machine Screw (W/Washer) M3.5 x 6 [43] (for securing the switch) .................... 0.6
(3) Special Screw M5 [66] .......................................................................................... 1.96

8-5. Insulation Tests

On completion of disassembly and repair, measure the insulation resistance and conduct insulation tests
(dielectric strength test).
Insulation resistance: 7 M Ω or more with DC 500 V Megohm tester
Dielectric strength: AC 4,000 V/1 minute, with no abnormalities ................... 230 V --- 240 V

8-6. No-load Current Value

After no-load operation for 30 minutes, the no-load current value should be lower than the specified one at a
frequency of 50/60 Hz.
230 V --- 240 V
[31] [32] [33]
[34]
0.7 --- 1.3 A
[35]
[37]
[36] [38]
[49]
[50]
--- 14 ---
[40]
[39]
Fig. 10
0.5 N m (20
•
0.15 N m (6 1.5 kgf
•
0.5 N m (20
•
[55]
[56]
5 kgf cm)
•
cm)
•
5 kgf cm)
•