Xylem 580-IM Marlow Series 580 - Manual (Page 22)

10. Volute gasket
11. Impeller washer
12. Shaft sleeve
13. Shaft
Figure 2: Standard mechanical seal
Install the impeller
1. Install the impeller, impeller washer, lockwasher, and capscrew.
2. Tighten the capscrew according to the Capscrew torque values table.
Reinstall the pump assembly
1. Install a new volute gasket.
2. Install the pump assembly into the volute.
3. Tighten the volute capscrews according to the Capscrew torque table.
4. Install a seal flushing tube if it is used.
5. Install the drain plug and close the drain valve.
6. Open the isolation valves and inspect the pump for leaks.
7. Return the pump to service if it is not leaking.
Screw torque values
Capscrew torque in ft-lb (Nm)
Capscrew
type
Head
marking
Capscrew diameter (in inches)
1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1
SAE grade
2
6 (8) 13 (18) 25 (34) 38 (52) 60 (81) 120 (163) 190 (258) 210 (285) 300 (407)
Brass and
stainless
steel
or 4 (5) 10 (14) 17 (23) 27 (37) 42 (57) 83 (113) 130 (176) 200 (271) 300 (407)
SAE grade
5
10 (14) 20 (27) 35 (47) 60 (81) 90 (122) 180 (244) 325 (440) 525 (712) 800
(1085)
Dealer servicing
If trouble occurs that cannot be rectified, contact your local Xylem representative and be
prepared to provide this information:
1. Complete nameplate data of pump and motor
2. Suction and discharge pipe pressure gauge readings
3. Ampere draw of the motor
4. A sketch of the pump hook-up and piping
Maintenance
20 Series 580 Installation, Operation, and Maintenance Manual