Liberty Pumps GR-Series - Manual (Page 2)

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IMPORTANT: All Liberty Pump models are supplied with their own separate Installation/Operation/Maintenance
manuals. Ensure that you have received these manuals, and that you read and understand them prior to installing this
unit. If you have any questions, call Liberty Pumps customer service at (800) 543-2550.
GR22 Assembly
The GR22 quick disconnect assembly provides easy installation and removal
of the pump. When installed correctly it will seal and provide support for the
pump. Please ensure that installation is done as per the diagrams below.
The rail system comes in three parts:
1) Base: This is the large casting that is mounted to the floor of the
pumping chamber or vault. ½” studs are recommended spaced at 5.5”
apart.
2) Pump mounting claw: Liberty offers three different pump mounting
claws. The LE claw has a larger flange and fits LE70-Series, LE100-
Series, LEH100-Series, LEH150-Series and LEH200-Series sewage
pumps. The FL claw mates to FL100-Series, FL150-Series and
FL200-Series effluent pumps. Both GR22-LE and GR22-FL claws are
threaded
2” FNPT for optional mounting applications. The GR22-S
claw has a 2” NPT male thread for pumps with threaded discharges.
3) Support bracket: A small casting is supplied and is used to support
the top end of the 1- 1/4” guide rail pipe (pipe not included). This
casting needs to be mounted to a support structure, bar stock, angle
iron, or other means that attaches to the side walls of the vault. Note,
heavy guide rail pipe 1-
1/4” Galvanized or Stainless Steel is
recommended.
All the claws have a sealing grommet attached to it that provides the seal
between the claw and base unit. This seal requires no maintenance. On the
GR22-LE, AND GR22-FL a gasket should be used between the claw and
pump
– the gasket and mounting hardware are provided with the pump.
The stock flange that is shipped with the pump should be removed and
replaced with the claw.
The GR22-S features a split design for pumps without a flange. The threaded
base can be screwed into the pump’s discharge and then the claw and gasket
can be mounted.