Xylem Flygt 3201, Установка, эксплуатация и обслуживание, Страница: 36 / 48

Quantity: approximately 7.5 liters (7.92 US quarts)
4. Insert and tighten the new O-rings and plugs.
Tightening torque: Inspection plug 20 Nm (14.8 ft-lbs), Oil plug 30-60 Nm (22.1-44.3
ft-lbs)
Replace the wear rings
Before replacing any wear ring, do the action applicable for your pump model:
• Disconnect and remove the drive unit end from the pump housing.
When the clearance between the impeller wear ring (rotating) and pump housing wear
ring (stationary) exceeds 2mm (0.08in), one of the following wear rings must be replaced.
• the wear ring in the pump housing
• the impeller wear ring
Replace the wear ring in the pump housing, diffuser ring, or suction cover
Figure 8: The wear ring in the pump housing
1. Knock off the wear ring using a hammer and a chisel.
If necessary, saw grooves in the wear ring using a hacksaw.
2. Please, check the surface intended for the wear ring that it is clean, before you are
mounting a new wear ring.
3. Drive in the new wear ring.
Use a rubber mallet or a wooden block to prevent deformation.
The work will proceed more easily if the pump housing , diffuser ring, or suction cover
first is heated and/or the wear ring cooled.
Maintenance
34 Flygt 3201 Installation, Operation, and Maintenance Manual