IWAKI PUMPS MXM Series, Instruction Manual

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Maintenance
b. MXM542/ 543/ 545
Attach the impeller unit to the magnet capsule
assembly.
The mating surface on the assembly has two
holes. The large hole (Stepped holes with 6mm
at outer dia. & 12mm at inner dia) is for the
lock pins and the small hole (3mm dia.) is for
cooling. Press the impeller unit into the magnet
capsule assembly with U-shape hole under the
smaller hole (3 mm dia.). If it is difficult to insert
them, warm the magnet capsule assembly in
the hot water (approx. 90°C) for 5 minutes. Be
careful not to scald at this time.
After fitting the impeller unit, push the lock pins
into the lock pin holes from the inside as far as
it will go.
Use a flat-head screwdriver to turn the pins 90
degrees clockwise from the outside while hold-
ing the pins from the inside. Once it clicks, the
impeller unit is secured.
If the screw groove is deformed and can not be
used, the pin can be turned from the inside with
a 4mm hex. wrench. In this case pay attention
to turn the wrench anticlockwise. The lock pin
may be broken if it is turned in reverse.
U-shape hole ø3mm hole
Lock pin
Impeller
Magnet capsule
Lock pin
Lock pin