7
Check motor.
It may be equipped
with an automatic
resetting thermal
protector and may restart unexpectedly
(see specifications chart). Protector tripping
is an indication of motor overloading as a
result of operating the pump at too high a
pressure (over 125 PSI), too high of viscosity,
too high of specific gravity, excessively high
or low voltage, inadequate wiring, incorrect
motor connections, too small a motor (sized
incorrectly, not enough HP), or a defective
motor or pump.
Do not handle pump with wet hands
or when standing in water. Failure to
follow the General Safety Information
and all warnings could result in fatal
electrical shock!
Assembly
(If pump and motor are
pre-assembled, skip assembly.)
If a pump head needs to be coupled to
an electric motor, then the following
procedure should be followed. (See
Figures 3 and 4.) First, install one of
the two coupling halves and key on
the pump shaft and tighten the set
screw. The shaft end should be even or
slightly recessed from the coupling half
(approximately 1/8”). The other
coupling half must be installed on the
motor shaft. To do this, it should be
placed on the shaft with the key,
with the shaft recessed approximately
1/2”. The set screw is not yet tight-
ened. It is necessary to establish a gap
between the coupling halves of
approximately .02” to .05” (See Figure
4). A thin piece of cardboard or a piece
of paper folded up will work fine to set
this gap. The pump is placed into posi-
tion on the motor and the position of
the motor coupling half is established
using the piece of thin cardboard or
other gauge material. The motor
coupling half is tightened. The pump
is removed, the coupling spider (rubber
piece) is placed into position, and the
pump bolted to the motor using the
four bolts.
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Viton Models GMSV2A, GMSV4A, GMSV6C, GMSV2A3T, GMSV2A33T,
GMSV4A5T, GMSV4A53T, GMSV6C7T and GMSV6C73T
Teflon
®
Models GMST2A, GMST4A, GMST6C, GMST2A3T, GMST2A33T,
GMST4A5T, GMST4A53T, GMST6C7T and GMST6C73T
Form L-4089 (2/17)
Figure 3 - Pump Motor Assembly
Figure 4 - Assembly Coupler
Coupler Gap
Key
Key
Spider
Spider
Pump Shaft
Key
Coupling Halves
Coupling Half
Cutaway of Pump End
Motor Shaft
Motor
