Ingersoll-Rand G 270, Руководство пользователя и инструкция по обслуживанию

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19
INSTALLATION AND MAINTENANCE
LSA 46.2 / 47.1
ALTERNATORS
SERVICING - MAINTENANCE
Ref. 2981 GB - 4.33/a - 04.00
LEROY-SOMER
4.6 - Dismantling, reassembly
(see sections 5.4.1. & 5.4.2.)
During the warranty period, this operation should
only be carried out in an approved LEROY-SOMER
workshop or in our factory, otherwise the warranty
may be invalidated.
Whilst being handled, the machine should remain
horizontal (rotor not locked when moved).
4.6.1 - Tools required
To fully dismantle the machine, we recommend using the
tools listed below :
- 1 ratchet s extension,
- 1 torque wrench,
- 1 set of flat spanners : 8 mm, 10 mm, 18 mm,
- 1 socket set : 8, 10, 13, 16, 18, 21, 24, 30 mm
- 1 socket with male ferrule : 5 mm,
- 1 puller.
4.6.2 - Screw tightening torque
4.6.3 - Access to diodes
- Open the air inlet louvre (51)
- Disconnect the diodes.
- Check the diodes using an ohmmeter or a battery lamp (see
section 4-5)
If the diodes are faulty
- Remove the surge suppressor (347).
- Remove the 6 "H" mounting nuts for the diode bridges on the
support.
- Change the crescents, respecting the polarity.
4.6.4 - Access to connections and the
regulation system
Access directly by removing the box lid (48) or the AVR
access door (466).
4.6.5 - Replacing the NDE bearing on single
bearing machines
- Remove the box lid (48) and the NDE panel (365) and
remove the 2 screws from the part (122).
- Disconnect the stator outputs (T1 to T12).
- Disconnect the auxiliary winding wires with AREP
(X1,X2,Z1,Z2).
- Disconnect the exciter wires (5+,6-).
- Remove the air inlet louvre (51)
- Remove the 2 bearing thrust screws (78).
- Remove all 4 screws (37).
- Remove the bearing (36).
- Remove the ball bearing (70) using a puller with a central
screw (see drawing below).
- Check the condition of the "O" ring seal (349) and, if
necessary, change it.
- Fit the new bearing, after heating it by induction to
approximately 80°C.
When dismantling the machine, always change the
bearings.
IDENTIFICATION Screw Ø Torque N.m
Exciter screw M 6 10
Star diode bridge M 6 10
Diode nut M 6 4
Flange / Frame screw (46.2 S,
M) M 14 80
Flange / Frame screw (46.2 L,
VL) M 14 190
Flange / Frame screw (47.1) M 16 190
NDE bracket / frame screw M 12 50
Discs / Sleeve screw M 16 230
Earth screw M 10 20
Grille screws M 6 5
Cover screws M 6 5
Terminal block nut M 12 35
WARNING
WARNING