Gasboy Gilbarco Global Pumping Unit Operation Manual - Manual (Page 13)

MDE-4447A Global Pumping Unit Operation and Service Manual · May 2008 Page 9
Pumping Units with Throw-Out Rings Pumping Unit Operation and Maintenance
Pumping Units with Throw-Out Rings
All pumping units have rotors with throw-out rings and carbon blades.
Note: Studies conclude that pumping units with throw-out rings produce greater vacuum and
are more resistant to vapor lock.
To replace blades in rotors with throw-out rings, proceed as follows:
1 Install throw-out rings in the recesses of the rotor.
2 Install the rotor in the stator assembly.
3 Rotate the rotor until a blade slot is at the 12:00 o'clock position. Install a blade.
4 Rotate the rotor two slots from the installed blade. Ensure that the second slot is at the 12:00
o'clock position. Install a blade.
5 Repeat step 4 for the third blade.
6 Repeat steps 1 to 3 for the three remaining blades. See Figure 3-7 .
Figure 3-7: Pumping Units with Throw-Out Rings
Blade Slot at 12:00 o’clock Position
Stator
Throw-out Rings
Rotor and Shaft
Assembly