Bell & Gossett MK MV (8203, 8203X) - Manual (Page 46)

CAUTION:
Beware of the pinch point hazard between the rotating impeller and
the guide pin.
Remove the impeller: Ex-version
CAUTION:
A worn impeller and/or pump housing can have very sharp edges. Wear protective gloves.
1. Remove the pump housing.
2. Remove the impeller screw.
Use the impeller puller or the crowbars.
3. Remove the impeller.
4. Remove the plain washers and the adjustment washers.
Install the impeller: Ex-version
1. Prepare the shaft:
a) Make sure that the end of the shaft is clean and free from burrs.
Polish off any flaws with a fine emery cloth.
b) Make sure that the parallel key is seated in the keyway on the shaft.
c) Fit the adjustment washers.
Total thickness Thickness of washer mm (in)
The total thickness is (A) 3.4 mm (0.134 in.) 0.3 (0.012)
0.5 (0.02)
1.5 (0.06)
2. Mount the impeller:
a) Fit the washer on the lubricated impeller screw.
b) Fit the impeller to the shaft.
c) Hand-tighten the impeller screw enough to prevent it from falling off.
3. Measure the distance (B):
a) Lift the drive unit into the pump housing.
b) Measure the distance (B).
B
WS001508A
c) Lift off the drive unit.
4. Fasten the impeller.
If applicable, use the rod.
Tightening torque: 80 Nm (59 ft-lbs)
5. Mount the pump housing:
Maintenance
44 MK, MV (8203, 8203X) Installation, Operation, and Maintenance Manual