Figure 8 - Shaft and Seal Assembly
Figure 9 - Seal Types and Parts Identification
9
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models NG7V, NG11V, NG7V-PH and NG11V-PH
Form L-4092 (3/10)
GEAR SPEED REDUCER OPTIONS
A gear reducer can be directly mounted
between a standard pump and motor
combination. Gear speed reducers are
available for applications with high
specific gravity, or when viscosities are
greater than 100 SSU, using a standard
1725 RPM motor (See Appendix 1). The
pump relationship between volume
(GPM), pressure (PSI), speed (RPM),
viscosity, specific gravity and horsepow-
er is shown on performance chart in
Shurflo Motor Manual form L-4082.
12. Unit is ready for operation.
Maintenance
Make certain that
the power source is
disconnected before attempting to service or
disassemble any components!
If the power disconnect is out of sight, lock
it in the open position and tag to prevent
application of power.
CLEANING
Clean the suction line filter at regular
intervals.
ELECTRIC MOTOR (IF SUPPLIED)
Properly selected and installed, electric
motors are capable of operating for
years with minimal maintenance.
Periodically clean dirt accumulations
from open-type motors, especially in
and around vent openings, preferably
by vacuuming (avoid imbedding dirt in
windings). Oil and maintain as recom-
mended by motor manufacturer.
GENERAL
Periodically check that electrical connec-
tions are tight. Pump should be drained
if placed in an area that is subject to
freezing temperatures and/or lubricated
with fluid compatible with pump.
PUMP REPAIR
DISASSEMBLY
(Refer to Figure 13 for Reference
Numbers and Figures 8 & 9 for detailed
seal and shaft assemblies.)
1. Pump Removal from Motor
a. Remove four bolts (Ref. No. 20)
from pump body (Ref. No. 19) and
gently pull pump assembly from
motor.
b. Pump drive coupler does not
need to be removed from motor
unless motor needs to be
replaced. (If so, refer to Pump and
Motor Drive Coupler Replacement
on page 11.)
2. Gear and Shaft Assembly Removal
a. Remove cover plate (Ref. No. 34)
(held by eight screws, Ref. No. 1)
and o-ring gasket (Ref. No. 2).
Gently tap cover plate with
rubber mallet to free it from
dowel pins. Once cover is removed,
the idler shaft and gear assembly
can be pulled out of pump body
(Ref. No. 19).
b. Remove the idler gear (Ref. No. 4)
from the shaft (Ref. No. 24)
by removing retaining rings
(Ref. No. 15), then slide gears
off the shaft end (Ref. No. 4).
c. The drive gear (Ref. No 3) can be
pulled out. Before drive shaft
(Ref. No. 5) can be removed from
body (Ref. No. 19), remove
woodruff key (Ref. No. 25) by
gently tapping key with drift pin.
(Do not damage key or keyway
upon removal.)
NOTE:
The gears are helical gears. It is
important that the correct “twist” of
the gear is installed in the drive pocket
versus the idler pocket for efficient
directional operation. Reverse gears for
reverse pump operation.
Figure 7 - Right-hand Helix Gear is drive
gear for standard clockwise rotation when
facing the front of the pump.
Idler Gear
Left-hand Helix
Drive Gear
Right-hand Helix
Type 1
Ni-Resist Seat
with O-ring
Mechanical Seal
with Seal, Spring & Retainer
(three loose pieces)
One-piece Mechanical
Seal with thru boot
Type 1 Ni-Resist Seal
with Rubber Cup
Polished face always
goes against carbon
face of seal
Retaining Ring
Internal
Retaining Rings
(Carbon Steel)
SS Retaining Ring
Ball Bearing
O-Ring
Retainer
Seal Seat
Mechanical Seal
