6.4.6 Install the impeller
1. Install the impeller, impeller washer, lockwasher, and capscrew.
2. Tighten the capscrew according to the Capscrew torque values table.
6.4.7 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.
6.4.8 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)
*The M6 set screw has a rating of 10 N m.
6.4.9 Dealer servicing
If trouble occurs that cannot be rectified, contact your local sales and service
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
6 Maintenance
Series 80 INSTRUCTION MANUAL
25
Summary of Contents for 80
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