Grundfos MQ 3-35 Service Manual

28.04.2003
GB
6 / 24
3.2 Replacing the shaft seal, chambers and impellers
3.2.1 Removing the shaft seal
1. Slacken and remove the strap pos. 92.
2. Remove the screws pos. 91.
3. Carefully remove the pump sleeve pos. 16 using a screwdriver.
4. Remove the inlet part pos. 6 from the pump sleeve or the top of the chamber stack.
5. Remove the nut pos. 67 and the washer pos. 66. Hold the shaft with a screwdriver in the shaft end.
6. Remove the chambers pos. 4 and the impellers pos. 49.
7. Remove the washer pos. 107, the retaining ring pos. 111 and the washer pos. 102.
8. Remove the rotating shaft seal part pos. 104.
9. Remove the stationary shaft seal part pos. 103 using a screwdriver.
3.2.2 Fitting the shaft seal
1. Fit the stationary shaft seal part pos. 103 with the groove against the intermediate part pos. 2.
2. Fit the rotating shaft seal part pos. 104.
3. Fit the washer pos. 102 (2 mm), the retaining ring pos. 111 and the washer pos. 107.
TM02 0086 3700
TM02 6626 1103
104
102
111
107

Grundfos MQ 3-35 Specifications

General

Power Consumption	850 W
Maximum Head	35 m
Inlet/Outlet Size	1 inch
Weight	13 kg
Pump Type	Self-priming centrifugal pump
Power Supply	220-240V, 50Hz
Liquid Temperature Range	0°C to +35°C
Material	Stainless steel