Jouan B4i - 4 Replacement Procedures; 4.1 Motor Replacement

B4i-M
4 - 1
CAUTION : DISCONNECT THE MAINS POWER LEAD TO THE CENTRIFUGE BEFORE ALL
REPLACEMENT PROCEDURES !
Replacement of spare parts and adjustment are done using standard tools of a maintenance engineer
specialised in laboratory equipment.
As a guide, a list is given in the appendix. If, for a particular reason, any other tools are required, these are
clearly specified in the relevant chapter.
4.1. MOTOR REPLACEMENT
4.1.1. UNREFRIGERATED MODEL (B4i)
Dismounting
- Remove the pin (1) which joins the gas spring and the lid.
- Remove the front panel (2) by unscrewing the five screws and disconnect the power switch, the flat
cable, the display supply and the front panel ground cable. Lift the bowl seal and unscrew the three
press screws (3) of the chamber.
- Remove the bowl seal (4).
- Lift and remove the bowl (5).
- Disconnect the connectors (6) from the motor (J14), the tacho sensor (J4), the imbalance sensor (J7), the
microprocessor + power pcb, the motor earthing faston and the thermoswitch connection.
- Unscrew the motor press screw (7) located at the base of the motor.
- Lift and remove the motor (8).
- To separate the stabilizer from the motor, insert Allen key n°4 between the cooling ribs of the motor
perpendicularly to the screws. Repeat it for the 4 screws.
Refitting
- Carry out the above operations in the reverse order.
4 REPLACEMENT PROCEDURES
FIG. 4.1 - DISMOUNTING THE MOTOR OF THE B4i
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