Screw Tightening Torque; Insulation Test; No-Load Current - Hitachi CG 25SC Service Manual

2. Checking after reassembly

(1) Check that the Lock Off Button <4> can be operated normally. Check that the trimmer does not operate

just by pulling the Trigger <6>.

(2) Push the Button <34> and check that Housing (R) <43> and Housing (L) <41> can be turned 180° and

locked correctly.

(3) Check the handle portion (Pipe Ass'y <22>) can be smoothly extended and retracted, and firmly

locked.

• Tapping Screw ST3 x 6 [30]<32> ----------------------------------------------- 0.4 to 0.6 N

• Tapping Screw ST4 [4][10]<1><11> ------------------------------------------- 1.1 to 1.3 N

• M5 Nut [44]<52> -------------------------------------------------------------------- 2.0 to 3.0 N

Upon completing disassembly and repair, measure the insulation resistance and conduct an insulation test

(dielectric strength test).

Insulation resistance:

Dielectric strength:

After no-load operation for five minutes, the no-load current value at a frequency of 50 Hz should be as

follows:

Model CG 25SC: 2.2 A (max.)

Model CG 30SC: 2.3 A (max.)

7 M or more

4,000 VAC for 1 minute, with no abnormalities

-10-

m (4 to 5 kgf

cm)

•

•

m (11 to 13 kgf

cm)

•

•

m (20 to 30 kgf

cm)

•

•