Service manual

2. Overhauling
2-14
2.3.7 Changing the rotary rectifier
 Care must be taken not to damage the rotary rectifier when mounting it on the
conductive plate.
 When a soldering iron must be used on the rotary rectifier, make the contact time as
short as possible.
 Degrease the portion where it should be coated with screw lock agent “Screw Loctite”
for prevention of loose installation.
 The surge suppressor is integrated with the insulating plate and cannot be replaced
separately.
Tightening torque
SDG25S
-6A7
SDG45S
-6A6
SDG65S
-6A6
SDG100S
-6A6
SDG125S-6A6
SDG150S-6A6
Screw size
M6-20 ← ← ← ←
Tightening
torque
lbw
･
ft
[N
･
m]
(kgf
･
cm)
3.0
[4.1]
(42)
← ← ← ←
Rotary rectifier
Screw-lock
agent
Three Bond
1402B
← ← ← ←
Screw size
M6-25,16 ← ← ← M6-20
Tightening
torque
lbw
･
ft
[N
･
m]
(kgf
･
cm)
3.0
[4.1]
(42)
← ← ← ←
Conductive
plate
Screw-lock
agent
Three Bond
1402B
← ← ← ←
Model
SID01-09(K)
ERD51-09(J)
← ←
SIE01-12(K)
ERE51-12(J)
←
Tightening
torque
lbw
･
ft
[N
･
m]
(kgf
･
cm)
1.5
[2.0]
(20)
← ←
2.9
[3.9]
(40)
←
Silicon
rectifier
Screw-lock
agent
Three Bond
1402B
− − − −
Replacement of rotary rectifier
1. Pull out the rotor in accordance with the procedures mentioned in 2.3.1.
2. Remove the bearing from the shaft with bearing puller (gear puller).
3. Record or mark the portion at which the rotary rectifier is installed.
4. Remove the rotary rectifier after removing all the cables connected to it.
5. Remove the silicon rectifier.
6. Install a new silicon rectifier.
As for the silicon rectifier, forward direct direction polarity at K side and reverse direction
polarity at J side are used. Make sure not to make a mistake in the direction polarity. (See
3.2.1 Rotary rectifier, D of 4.5 “Checking Rotary Rectifier (Diode)” and also E of 4.5
“Checking Varistor”)
7. Fasten the silicon rectifier with the nuts, using a torque wrench, according to the tightening
torque in the above table.
8. Connect the cable soldered to the silicon rectifier.
9. Install the rotary rectifier in the reverse turn to its removal procedures.