Waukesha Cherry-Burrell
®
Brand Universal 3 Pump
Maintenance
02/2021
95-03103
Page 77
3. Apply a small amount of anti-seize to the shaft threads, then
install the rotor nut.
4. Repeat these steps for the second rotor.
5. Insert the rotor blocking tool (part number ) to keep
the rotors from turning when installing the rotor nuts.
NOTE:
When working on a rotor, always block the rotor
against the body, not against the other rotor. See Figure 185.
NOTE:
SPX FLOW recommends using the Non-Marring
Socket Tool for Rotor Nuts (see below) to protect the rotor
nut when torquing.
6. Torque the rotor nuts to the specified torque (see Table 14).
Remove the rotor blocking tool after torquing.
CAUTION
Use a torque wrench to tighten the rotor nuts to the proper torque.
Failure to tighten the nuts properly could result in the nuts
loosening during operation, causing damage to the pump.
Figure 184 - Install rotor nut
Figure 185 - Torque rotor nut
Table 13: Rotor Nut Wrench Size and Socket Tool
U3 Model
Wrench Size
Socket Tool
006, 014, 015, 018
15/16"
030, 034, 040
1-1/4"
045, 060, 064, 130, 134
1-5/8"
180, 184, 220, 224
2-1/4"
210, 214, 320, 324
2-3/8"
Table 14: Rotor Nut Torque
U3 Model
Rotor Nut
Torque
006, 014, 015, 018
50 ft-lb (68 N·m)
030, 034, 040
120 ft-lb (163 N·m)
045, 060, 064, 130,
134
250 ft-lb (339 N·m)
180, 184, 220, 224
325 ft-lb (441 N·m)
210, 214, 320, 324
375 ft-lb (508 N·m)