SHURflo R30GN User manual

Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. The Safety Instructions are contained in the
General Operating Instructions. Failure to comply with the safety instructions accompanying this product could result in personal injury and/or property
damage! Retain instructions for future reference.
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Description
SHURflo bronze, pedestal, self-priming, positive-displacement, flexible impeller pumps provide a nearly pulseless flow with no
metal-to-metal contact. This pedestal pump drive series includes a 303 stainless steel drive shaft with heavy-duty ball bearing
and carbon graphite bushing, providing for direct drive or pulley operation. Features include: bronze and/or brass pump
body, cam and cover; standard Buna-N mechanical seal with carbon ceramic faces and Nitrile impeller.
Uses: Handle a wide range of industrial, marine, agricultural and commercial applications where non-abrasive fluids
compatible with pump wet-end construction component materials are pumped. Pumps are suitable for the transfer of
non-lubricating fluids, mild abrasives, fluids containing small particles in suspension, and a wide variety of viscous fluids such
as petroleum-based oils, silicone greases, and hydraulic fluids. These units are ideal for water drainage transfer, barrel
emptying, machine coolant recycling, and an assortment of related utility activities.
NOTE: Flexible impeller failure will occur immediately if pump is run dry,and this is not covered under warranty.Use caution
to not touch the pump if you have dry run it, because it will be extremely hot.
•Flows up to 36.5 GPM at 3450 RPM.
•Maximum discharge pressure is 25 PSI (60 ft. of head).
• Max. RPM: 3450.
•Suction lift to 13.5 ft.
•Buna-N mechanical seal with carbon ceramic wear faces and 18-8 stainless steel components.
• Maximum viscosity up to 500 SSU and 25 PSI (60 ft. of head) at 1725 RPM or run at reduced speeds to handle a wide range
of pump fluid viscosities (up to 2500 SSU) and specific gravity (up to 1.3). DO NOT pump oils or petroleum derivatives with
optional neoprene impellers. (Maximum torque loads are found in the performance chart.)
• Pumps can operate bi-directionally (reversible).
•Temperature range with Nitrile impellers is 0°F - 180°F (optional neoprene impellers is 15°F - 130°F).
•Includes a 303 stainless steel drive shaft with heavy-duty ball bearing and carbon graphite bushing, providing for direct
drive or pulley operation.
BRONZE MODELS – Excellent for water-based fluids. Features include: bronze and/or brass pump body, cam and cover; standard
Buna-N mechanical seal with carbon ceramic faces and Nitrile impeller.Wet-end parts are constructed from bronze, brass, Nitrile,
carbon, ceramic and stainless steel (18-8, 303 and/or other 300 series).
REPAIR IMPELLERS AND OPTIONS – Standard impellers are Nitrile, and they and the optional neoprene impeller can be
located in the repair parts list pages in this manual.
NOTE: Bronze and 316 stainless steel flexible impeller pumps are also available as close-coupled models for custom installation. They are
equipped with motors.
WARNING: Do not use to pump flammable or explosive fluids such as gasoline, fuel oil, kerosene, etc. Do not use in flammable
and/or explosive atmospheres. When pumping hazardous or dangerous materials, use only in a room or area designated for that
purpose. For your protection, always wear proper clothing, eye protection, etc. in case of any malfunction. For proper handling techniques
and cautions, contact your chemical supplier, insurance company and local agencies (fire dept., etc.). Failure to comply with this warning
could result in personal injury and/or property damage.
SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
Refer to form L-4082 for General Operating and Safety Instructions.
Form L-4095 (12/09)

SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
2
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Example Model: R50GN (will require 1 HP ODP motor with >1.15 Service Factor*)
(motor not supplied with pedestal pump)
R: Bronze 30G (1/2") Blank: Neoprene
Flexible 50G (3/4")
Impeller 102 (1") N: Nitrile
Pump
Model** Impeller Size Impeller
(Ports***) Material
NOTE:Not all order code combinations (configurations) are standard
models available from the manufacturer. Custom model configurations
may require ordering standard components and/or optional parts that
will need to be assembled by the customer.
Manufacturer reserves the right to change model order codes, stan-
dard models, specifications, and performance without notification.
Pedestal Pumps are not supplied with a motor.
Maximum motor speed is 3600 RPM.
Rseries pumps are all pedestal mounts for multi-speed configurations.
(*) ODP motors have > 1.15 service factors. Due to service factor,it is
recommended TEFC motors are oversized by one HP increment.
(**) Has a Buna-N carbon ceramic mechanical seal.
(***) Port size inlet and outlet (in inches).
Model Ordering Codes and Options
(1) (2) (3)
R 50G N

3
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models R30GN, R50GN and R102N
Form L-4095 (12/09)
Performance (with Water)
GPM Pumping Water at 70° F @ Total Feet of Head
Max. Input Suction
Model Port Size* HP** Torque in.-lbs. RPM Lift*** Free Flow 10 20 30 40 50 60†
R30GN 1/2 1/3 11 1750 8.1 5.7 5.5 5.0 4.8 4.6 4.3 4.1
1/2 3450 9.8 10.8 10.5 10.2 10.0 9.6 9.3 9.0
R50GN 3/4 3/4 21 1750 9.4 13.1 11.5 11.0 10.6 10.1 9.0 7.8
1 3450 12.0 23.9 23.5 22.5 21.9 20.6 19.4 17.6
R102N 1 1 29 1750 10.2 20.2 19.6 18.8 18.0 17.0 16.0 14.7
11⁄23450 13.5 36.5 33.0 32.5 31.7 30.7 29.5 27.5
Test data taken with water at 70° F (to convert data to PSI, divide feet of head by 2.31).
Pump performance when pump is new. As pump wears, the performance will decrease.
(†) Extended operation beyond 60 feet of head will result in immediate impeller failure.
(*) Female NPT inlet and outlet (in inches).
(**) Suggested horsepower; pumps do not ship with motors.
(***) Suction lift requires wetted impellers and seal chamber.
NOTES:Consult tables on HP adders and speed recommendations for high viscosity fluids. The pump relationship between volume (GPM),
pressure (PSI), speed (RPM) and horsepower is shown on Performance Chart in Shurflo Motor Manual form L-4082. When pumping
amore viscous liquid, a slower speed, a larger pipe size pump, and possibly a larger motor should be selected.
Max. Viscosity = 500 SSU at 1725 RPM (at 1.0 specific gravity).
Max. Input Torque = see chart above.
Max. RPM = 3450.
Max. Specific Gravity = 1.0 at 25 PSI, up to 1.3 at lower PSI & viscosity.
Do not use Neoprene impellers with oil.
Manufacturer reserves the right to change performance without notification.

SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
4
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Specifications
PUMP CONSTRUCTION (Wet End)
NPT
Inlet & Pump Drive Body, Cam Wet End Ship
Max. Outlet Shaft Shaft End Impeller & Cover Keys & Shaft Wt.
Model RPM Port Size* Bearings Material** Castings Clip Shaft†Bearings Gasket Seal*** (lbs.)
R30GN 3450 1/2" 1/2" Nitrile BZ & BR 300 Series SS SS CG Ball Vellumoid Buna 4.2
R50GN 3450 3/4" 5/8" Nitrile BZ & BR 300 Series SS SS CG Ball Vellumoid Buna 5.2
R102N 3450 1" 5/8" Nitrile BZ & BR 300 Series SS SS CG Ball Vellumoid Buna 6.6
SS = Stainless Steel CG = Carbon Graphite BR = Brass BZ = Bronze
(†) 303 or 300 Stainless Steel Series
(*) The shafts have drive slots with key for drive couplers or pulleys.
(**) The impeller insert can be made of bronze, brass or 300 Series Stainless Steel.
(***) Mechanical seal with carbon ceramic faces and 18-8 Series Stainless Steel components.
NOTE: Manufacturer reserves the right to change specifications without notification.

SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Figure 1
Dimensions
Inlet & Shaft Dimensions (in inches)
Model Outlet Port* Dia.** A B C D E F G H I J K L M** N*
R30GN 1/2 1/2 1.63 3.10 2.26 3.19 5.63 1.84 3.38 2.13 .034 3.75 1.12 2.94 0.125 1/8
R50GN 3/4 1/2 2.13 3.75 2.50 4.08 5.93 1.51 3.86 2.25 0.41 3.37 1.25 3.00 0.18 1/8
R102N 1 5/8 2.13 4.26 3.00 3.68 5.69 1.12 4.69 2.75 0.39 3.24 1.44 3.62 0.18 1/8
(*) Standard NPT (female) pipe thread. Models R30GN and R50GN only have one drain plug (one dimension N).
(**) The shafts have drive slots with key for drive couplers or pulleys.
NOTE: All dimensions have a tolerance of (+ or -) 1/8"
.
Manufacturer reserves the right to change dimensions without notification.
View is from
Drive Shaft End
NOTE: Location
of single drain
plug (N) for
pump models
R30GN and
R50GN.
N
N
Clockwise Rotation
Out In
Counterclockwise
Rotation
In Out
Models R30GN, R50GN and R102N
5
Form L-4095 (12/09)

SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
6
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Impeller Identification Chart
Impeller (Dimensions in inches) Number
Part Outside Hole of
Number Material Dia. Width Dia. Key slot Blades
10077S Neoprene 2.23 0.78 0.53 0.09 12
09959S Neoprene 2.45 1.25 0.63 0.18 12
10615S Neoprene 2.58 1.63 0.63 0.18 12
12336S Nitrile* 2.23 0.78 0.53 0.09 12
21251S Nitrile* 2.45 1.25 0.63 0.18 12
19317S Nitrile* 2.58 1.63 0.63 0.18 12
Refer to Repair Parts list pages in this manual to match up impeller with pump model.
(*) Nitrile is standard and is equivalent to Buna-N. Nitrile is suggested for pumping
oil-based fluids, and Neoprene is suggested for pumping water-based fluids.
NOTES: Dry running will result in immediate failure of impeller and cause extreme
pump temperature (do not handle pump when hot).
Impeller damage is not covered under warranty.
Manufacturer reserves the right to change dimensions without notification.
Hole
Diameter
Outside Diameter
Key slot
Width

7
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models R30GN, R50GN and R102N
Form L-4095 (12/09)
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 25 PSI or 60 feet of head), 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!
Installation
IMPORTANT: In any installations where
property damage and/or personal
injury can occur when the pump is
not operating due to power outages,
discharge line freezing, or any other
reason, a back-up system(s) and/or
warning system(s) should be used.
In order to safely use this product,
familiarize yourself with this pump and
also with the liquid (chemical, etc.)
that is going to be pumped through
the unit. This pump is not suitable for
many liquids.
1. Locate the pump as close to the
liquid source as possible, making
the suction line as short and direct
as possible.
PIPING
SUCTION
2.Avoid excessive lengths or number of
fittings and bends in the suction line.
3. Attach suction line to suction inlet
(See Figure 1 for proper rotation).
NOTE: An optional vacuum switch (pump
protector) is recommended to prevent
pump dry run. It should be mounted on
the suction side of the pump. Refer to
installation/operation instructions
provided with vacuum switch.
4. It is recommended that same size
pipe as pump ports be used or, in
cases requiring lengthy piping, the
next larger size pipe be used.
5. If suction level is greater than what
is indicated in the performance
chart, attach a foot valve below
liquid level at end of suction line to
ensure positive priming. Also note:
If fluid specific gravity is greater
than 1.0 or viscosity greater than
500 SSU, a foot valve is also
recommended.
NOTE: If a foot valve (or check valve) is
not used in the suction line, it may be
necessary to refill the pump every time
the unit is stopped and you wish to restart
the pump. This depends on the length of
time between starts and whether or not
the impeller is wet enough to close cavities
to affect a prime.
6. If solid contaminates are suspected
in a liquid, place a filter in the
suction line.
7. Be certain all suction piping connec-
tions are airtight.
NOTE: Assure airtight pipe connections
with the use of a pipe joint sealant.
DISCHARGE
8. Attach discharge piping to the
discharge outlet.
Support pump and
piping during assembly
and after installation. Failure to do so may
cause piping to break, pump to fail, motor
bearing failures, etc., all of which can result in
property damage and/or personal injury.
NOTE: Should the pump need to be
self-draining, the pump head should be
mounted in the vertical position with
the suction port facing down. When
pumping high viscosity fluids, the
vertical position can be used with the
suction port facing up and the pump
mounted under the source. Increasing
the suction pipe size and eliminating
bends and elbows also assists in pump-
ing high viscosity fluids. Max. viscosity is
500 SSU at 1725 RPM.
9. If a shut-off valve or handgun is
required in discharge line, provide
apressure relief valve for pump
protection.
Shutting off
discharge without
providing pressure relief can cause extreme
overpressure which can result in pump
and/or motor failure. Do not exceed 25 PSI
(or 60 feet of head) pump or system pressure.
10. Operation under shut-off discharge
conditions will overheat and
damage pump and impeller.
NOTE: Globe valve or other restrictive
valves should not be used as shut-off
mechanism as they are restrictive in
nature and will seriously affect pump
performance.
11. After all piping and controls (not
supplied with unit) have been
installed, unit is ready for operation.
Operation
Do not run pump
dry, as permanent
damage to the pump impeller, seal, pump
housing and wear plates will result. Suction
pressure should never be greater than the
discharge pressure. Dry running will result in
immediate failure of impeller and cause
extreme pump temperature (do not handle
pump when hot). Impeller damage is not
covered under warranty.
1. All pumps must be primed before
start-up and filled with fluid (See
Figure 3). Never operate a pump
unless it is secured to a solid foun-
dation and all safety shields are
installed.
Upon start-up, maintain a minimum
of 15 PSI (1 BAR) operating pressure
on the pump. This will allow any
remaining air to be driven from the
seal chamber and will ensure liquid
circulation to the seal.
2. Flexible impeller pumps are built
to very close tolerances and this

SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
8
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Operation (Continued)
tolerance must not be altered. The
liquids must, therefore, be free of
all abrasives. Sand, silt, wettable
powders, etc. must be avoided.
3. When pumping a more viscous
(beyond 500 SSU) liquid; a slower
speed, a larger pipe size pump,
and possibly a larger motor should
be selected.
NOTE: See performance chart for Max.
Torque.
4. Recheck motor and pump rotation.
Pump rotation is by-directional
(See Figure 1).
PRESSURE RELIEF VALVE
5. Standard models do not include a
pressure relief valve. If discharge is
going to be shut off, an external pres-
sure relief valve should be installed.
6. 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
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
Check the pump to motor shaft coupler
alignment at regular intervals.
Periodically check that electrical connec-
tions are tight. Pump should be drained
if placed in an area that is subject to
freezing temperatures and should not
be operated until temperature permits.
To store the pump, place a small quanti-
ty of light oil or some other storage
preservative compatible with your
application in the pump and rotate the
shaft very slowly to work the oil
throughout the gears and the body.
PUMP REPAIR
(Procedures for Models R30GN and
R50GN - See Figures 2 and 6)
DISASSEMBLY
Never use petroleum-
based grease or oil
with optional Neoprene impellers.
1a. Remove six screws (Ref. No. 21) and
six lockwashers (Ref. No. 22) secur-
ing cover (Ref. No. 4) to the pump
body (Ref. No. 12). Pull the cover
and bushing assembly off the drive
shaft (Ref. No. 18).
b. Remove and discard the gasket
(Ref. No. 5).
c. To remove impeller (Ref. No. 8),
gently grip the vanes on opposite
sides of the impeller with two pair
of pliers. Alternately pull on the
impeller with the pliers or use two
screwdrivers on opposite sides to
pull it out.
d. Inspect impeller for excessive wear
and/or damage (See Figure 2).
NOTE: The impeller is a common wear
item in this pump and frequent replace-
ment is suggested. Impeller can become
torn, distorted and overheated, becom-
ing brittle. When this happens, impeller
blade fragments can come off the
impeller and be pumped downstream
or block pump ports or plumbing.
It is not recommended to flip around a
used/worn impeller for reinstallation.
(See Appendix 1 for illustrations of com-
mon impeller problems.)
e. To remove the cam (Ref. No. 7),
remove the screw (Ref. No. 6) that
goes down through the top of the
body between the intake and
discharge ports.
f. To remove the bearing housing (Ref.
No. 14), seal assembly (Ref. Nos. 10 &
11), and shaft (Ref. No. 18) from the
pump body (Ref. No. 12), remove the
two screws (Ref. No. 20) and lock-
washers (Ref. No. 22) from the
bearing housing (Ref. No. 14) on the
drive shaft end of pump body (Ref.
No. 12) (See Figure 3).
Inspect impeller,
pump cover, cam
and pump
housing for
wear. Replace
any part that
shows signs
of wear.
Figure 2 - Impeller Removal or Installation
Always replace gasket
Cam
Figure 3 - Bearing Housing
Removal and Assembly

9
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models R30GN, R50GN and R102N
Form L-4095 (12/09)
g. Remove the woodruff key (Ref. No.
9), located on the side of the shaft
(Ref No. 12), by either of the follow-
ing two methods: place a screwdriv-
eron the woodruff key and tap
lightly on the woodruff key with a
mallet. Be careful not to damage
the woodruff key. If this does not
work, put the woodruff key in a soft
vise, tighten, then pull up on the
body (See Figure 4).
Do not damage the
shaft.
h. Using a large snap ring pliers,
remove the internal retaining ring
(Ref. No. 16) from the bearing hous-
ing (Ref. No. 14). Using a small snap
ring pliers, remove the retaining
ring (Ref. No. 17) from the shaft
(Ref. No. 18) at the seal end. While
supporting the bearing housing
(Ref. No. 14), press against the shaft
from the impeller end. The mechani-
cal seal (Ref. No. 10) will slide off
the shaft (See Figure 4).
i. Check the ball bearing (Ref. No. 15)
for leakage or damage. Discard the
bearing gasket (Ref. No. 13) and
replace with a new one (See Figure 4).
j. Inspect for leakage between the
shaft (Ref. No. 18) and pump body
(Ref. No. 12) at the drive end.
k. To remove the seat assembly (Ref.
No. 11), push a screwdriver through
the bearing end and against the
rubber or backside of the seal seat
(See Figure 4).
2a. Inspect drive shaft (Ref. No. 18). If
drive shaft has scratches where
mechanical seal (Ref. No. 10) is
installed or if key slots are worn,
replace shaft. If shaft is bent,
replace as well (See Figure 4).
b. Inspect the bushing (Ref. No. 3) in
cover (Ref. No. 4) for wear and/or
damage. If cover is worn (grooved
or distorted), replace.
c. The shaft should be installed into
the carbon bushing (Ref. No. 3) to
allow it to turn freely. It should not
be tight or fit loosely.If it does,
replace bushing.
3a. To replace the bushing (Ref. No. 3)
in the cover (Ref. No. 4), carefully
tap on a screwdriver with a mallet
to chip the old bushing from the
hole.
b. Push new bushing (Ref. No. 3) into
place, chamfer end first, until bush-
ing is flush against cover (Ref. No. 4).
Do not damage
the brass cover.
4a. Replace mechanical seal (Ref. Nos.
10 & 11) if removed, or is leaking
between the body and shaft while
the pump is running.
b. Remove the shaft (Ref. No. 18). See
above.
c. Push or pry out the old mechanical
seal seat (Ref. No. 11) by applying
incremental pressure with a screw-
driver from shaft bore at pump drive
end in bearing retainer (Ref. No. 14).
Do not damage seal bore in pump
body.Discard old mechanical seal
seat.
ASSEMBLY
1a. Before installing the cam (Ref. No. 8),
wipe offthe old Permatex that has
built up on the cam and penetrated
the impeller cavity. Hold the cam in
place while installing and tightening
the screw (Ref. No. 6) that goes
between the intake and discharge
ports in pump body (Ref. No. 12).
b. Using a snap ring pliers, place the
retaining ring (Ref. No. 17) onto the
shaft (Ref. No. 18) and push down
into the second groove from the
drive shaft end. Push the ball bear-
ing (Ref. No. 15) over the shaft
(Ref. No. 18). Using a screwdriver,
carefully push the bearing up
against the retaining ring. Using a
snap ring pliers, place the second
retaining ring (Ref. No. 17) over the
shaft and against the ball bearing
(See Figure 4).
c. From the woodruff key end of the
shaft, push the seal seat (Ref. No.
11) over the shaft, rubber side first,
into the bearing housing (Ref. No.
14) (See Figure 4). Do not use any-
thing but water to lubricate the
seal seat.
Be careful not to
damage the white
ceramic surface on the seat (or the black
carbon face on seal). Damage could cause
leakage.
d. Push the bearing (Ref. No. 15) and
shaft assembly onto the bearing
housing (Ref. No. 14). Using uniform
pressure with a screwdriver, pop the
retaining ring (Ref. No. 16) into
place against the large internal
bearing (Ref. No. 15) (See Figure 4).
e. Push the mechanical seal (Ref. No.
10) over the shaft and down against
the seal seat (Ref. No. 11) (See
Figure 4). Do not use anything but
water to lubricate seal on shaft.
f. Using a snap ring pliers, place the
third retaining ring (Ref. No. 17)
on the shaft (Ref. No. 18).
Simultaneously compress the seal
assembly (Ref. No. 10) to allow the
Figure 4 - Drive Shaft Assembly
Seal Seat
Bearing
Retaining
Ring
Seal Assembly
Key
Small
Retaining
Ring

SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
10
Maintenance (Continued)
retaining ring (Ref. No. 17) to snap
into the groove on the shaft (Ref.
No. 18) (See Figure 4).
g. Press the woodruff key (Ref. No. 9)
into the key way in the shaft (Ref.
No. 18) using soft-jaw pliers or a soft
vise (See Figure 4).
Be careful not to
bump woodruff key
against the stainless steel shaft.
h. Place a new small gasket (Ref. No.
13) onto the bearing housing (Ref.
No. 14).
i. Assemble the complete shaft, bear-
ing and seal assembly onto the
pump body (Ref. No. 12). Insert the
two long screws and washers (Ref.
Nos. 20 & 22) that secure the bear-
ing housing (Ref. No. 14) to the
pump body (Ref. No. 12) and tighten
(See Figure 3).
j. Lubricate impeller end of shaft with
silicone or soapy water.
k. Place a new impeller (Ref. No. 8)
over the shaft (Ref. No. 18). Align
the key (Ref. No. 9) in the shaft with
the key way in the impeller,and
push the impeller into the pump
body (Ref. No. 12) with a twisting
motion until impeller is inserted into
pump body.Impeller should not be
forced over key and should slide
easily (See Figure 2).
l. Rotate shaft (Ref. No. 18) several
turns in direction of rotation to
position impeller vanes.
m. Attach a new gasket (Ref. No. 5)
over the dowel pins (Ref. No. 1),
then place cover on the gasket and
fasten with screws and lockwashers
(Ref. Nos. 21 & 22) (See Figure 2).
n. All pumps must be primed before
start-up and filled with fluid (See
Figure 3). Never operate a pump unless
it is secured to a solid foundation and
all safety shields are installed.
PUMP REPAIR
(Procedures for Model R102N - See
Figures 2 and 7)
DISASSEMBLY
Never use petroleum-
based grease or oil
with optional Neoprene impellers.
1a. Remove four screws (Ref. No. 16)
and four lockwashers (Ref. No. 17)
securing cover (Ref. No. 10) to the
body (Ref. No. 4). Pull the cover and
bushing assembly off the drive shaft
(Ref. No. 12) (See Figure 2).
b. Remove and discard the gasket
(Ref. No. 9) (See Figure 2).
c. To remove impeller (Ref. No. 7),
gently grip the vanes on opposite
sides of the impeller with two pair
of pliers. Alternately pull on the
impeller with the pliers or use two
screwdrivers on opposite sides to
pull it out (See Figure 2).
d. Inspect impeller for excessive wear
and/or damage (See Figure 2).
NOTE: The impeller is a common wear
item in this pump and frequent replace-
ment is suggested. Impeller can become
torn, distorted and overheated becom-
ing brittle. When this happens, impeller
blade fragments can come offthe
impeller and be pumped downstream
or block pump ports or plumbing.
It is not recommended to flip around a
used/worn impeller for reinstallation.
(See Appendix 1 for illustrations of
common impeller problems.)
e. To remove the cam (Ref. No. 6),
remove the screw (Ref. No. 8) that
goes down through the top of the
body between the intake and dis-
charge ports.
f. Remove the woodruff key (Ref. No.
13), located on the side of the shaft
(Ref. No. 12), by either of the fol-
lowing two methods: place a screw-
driver on the woodruffkey and tap
lightly on the woodruffkey with a
mallet. Be careful not to damage
the woodruff key. If this does not
work, put the woodruff key in a soft
vise, tighten, then pull up on the
body (See Figure 4).
Do not damage the
shaft.
g. Using a large snap ring pliers,
remove the internal retaining ring
(Ref. No. 1) from the drive end side
of the pump body (Ref. No. 4).
Using a small snap ring pliers,
remove the retaining ring (Ref. No.
3) from the shaft (Ref. No. 12) at the
seal end. The mechanical seal (Ref.
No. 5B) will slide off the shaft (Ref.
No. 12). While supporting the pump
body (Ref. No. 4), pull against the
shaft from the drive end until shaft
and bearing assembly are removed
(See Figure 5).
h. Check the ball bearing (Ref. No. 2)
for leakage or damage. Replace if
necessary.
i. To remove the seal seat assembly
(Ref. No. 5A), push a screwdriver
through the bearing end of pump
body (Ref. No. 4) and against the
rubber or backside of the seal seat.
2a. Inspect drive shaft (Ref. No. 12). If
drive shaft has scratches where
mechanical seal (Ref. No. 5B) is
installed, or if key slots are worn,
replace shaft. If shaft is bent,
replace as well.
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Seal
Assembly
Figure 5 - Seal Installation and Removal

11
b. The shaft should be installed into
the carbon bushing (Ref. No. 11) to
allow it to turn freely. It should not
be tight or fit loosely. If it does,
replace bushing.
3a. To replace the bushing (Ref. No. 11)
in the cover (Ref. No. 10), carefully
tap on a screwdriver with a mallet
to chip the old bushing from the
hole.
b. Push new bushing (Ref. No. 11)
into place, chamfer end first, until
bushing is flush against cover (Ref.
No. 10).
Do not damage
the brass cover.
4a. Replace mechanical seal (Ref. Nos.
5A & 5B) if removed, or is leaking
between the body and shaft while
the pump is running.
b. Remove the shaft (Ref. No. 12). See
above.
ASSEMBLY
1a. Before installing the cam (Ref. No. 6),
wipe offthe old Permatex that has
built up on the cam and penetrated
the impeller cavity.Hold the cam in
place while installing and tightening
the screw (Ref. No. 8) that goes
between the intake and discharge
ports in the pump body (Ref. No. 4).
b. Push the seal seat (Ref. No. 5A) into
pump body (Ref. No. 4) rubber side
first. Do not use anything but water
to lubricate the seal seat.
Be careful not to
damage the white
ceramic surface on the seat (or the black
carbon face on seal). Damage could cause
leakage.
c. Inspect for leakage between the
shaft (Ref. No. 12) and body (Ref.
No. 4) at the drive end.
d. Lubricate the drive and seal assem-
bly (Ref. No. 5B) with water, and
slide the new seal assembly over the
impeller shaft (Ref. No. 12) with the
carbon face first. Slide onto the
shaft until the carbon seal face is
compressed against the ceramic seal
seat (Ref. No. 5A) (See Figure 5).
e. Push drive shaft assembly (Ref. No.
12) with bearing (Ref. No. 2) and
bearing retaining rings (Ref. No. 3)
into the drive shaft side of the
pump body (Ref. No. 4). Be sure to
lubricate the drive shaft with water
before pushing it through the new
seal seat. After the bearing shaft
assembly is pushed into the pump
body (Ref. No. 4), reinstall snap ring
(Ref. No. 1) into the pump body
(Ref. No. 4).
f. Using a snap ring pliers, place the
third retaining ring (Ref. No. 3)
on the shaft (Ref. No. 12).
Simultaneously compress the seal
assembly (Ref. No. 5B) to allow the
retaining ring (Ref. No. 3) to snap
into the groove on the shaft (Ref.
No. 12).
g. Press the woodruffkey (Ref. No. 13)
into the key way in the shaft (Ref.
No. 12) using soft-jaw pliers or a
soft vise.
Be careful not to
bump woodruffkey
against the stainless steel shaft.
h. Lubricate impeller end of shaft with
silicone or soapy water.
i. Place a new impeller (Ref. No. 7)
over the shaft (Ref. No. 12). Align
the key (Ref. No. 13) in the shaft
with the key way in the impeller,
and push the impeller into the
pump body (Ref. No. 4) with a twist-
ing motion until impeller is inserted
into pump body. Impeller should not
be forced over key and should slide
easily (See Figure 2).
j. Rotate shaft (Ref. No. 12) several
turns in direction of rotation to
position impeller vanes.
k. Attach a new gasket (Ref. No. 9)
over the dowel pins (Ref. No. 15),
then place cover on the gasket (Ref.
No. 10) and fasten with screws and
lockwashers (Ref. Nos. 16 & 17).
l. All pumps must be primed before
start-up and filled with fluid (See
Figure 3). Never operate a pump
unless it is secured to a solid
foundation and all safety shields
are installed.
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Models R30GN, R50GN and R102N
Form L-4095 (12/09)

12
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Repair Parts List For R30GN and R50GN
20 22
2
14
16 17
15 17
19
9
18 6
13 11 10 17
12
1
7
8
5
3
422 21
Ref. Part No. For Model:
No. Description R30GN R50GN Qty.
1 Dowel Pin 01311 01311 2
2 Drain Plug (Bronze, Brass or Stainless Steel) 00336 00336 1
3 Bushing (Carbon Graphite) 02075 06333 1
4Cover (Bronze or Brass) 10279 10094 1
5 Gasket (Vellumoid) 10286 10103 1
6 Cam Screw (Bronze, Brass or Stainless Steel) 10195 09919 1
7Cam (Bronze or Brass) 10285 10072 1
8 Impeller (Nitrile, with Bronze, Brass or 300 Series SS insert) 12336S 21251S 1
Optional Impeller (Neoprene, with Bronze, Brass or 300 Series SS insert) 10077S 09959S 1
9 Woodruff Key 10093 04432 1
10 & 11* Mechanical Seal and Seat (Buna-N) Assembly 24833S 24843S 1
12 Pump Body (Bronze or Brass) 10596 10176 1
13 Gasket (Vellumoid) 10197 10171 1
14 Ball Bearing Housing (Bronze or Brass) 15103 15104 1
15 Ball Bearing 04306 04257 1
16 Retaining Ring 04303 04259 1
17 Retaining Ring 04304 04258 3
18 Shaft (303 Stainless Steel) 24832 10175 1
19 Key (Square) 13370 21437 1
20 Screw 05437 04265 2
21 Screw 18899 01482 4 or 6
22 Lockwasher 00343 12710 4or 6
Repair Kit (consists of Ref. Nos. 5, 8, 10, 11, 13) 23662 23663 1
(*) Mechanical seal/seat assembly with carbon ceramic faces and 18-8 Stainless Steel components.
Manufacturer reserves the right to change parts without notification.
Figure 6
Please provide following information:
-Model number
-Serial number (if any)
-Part description and number
as shown in parts list
To order parts, contact a SHURflo Distributor or Order Direct.
Distributors can be found at www.shurfloindustrial.com.

13
14 4
8
6
7
911
10
17 16
15
3
5A 5B
12
18
3
2
3
1
13
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Figure 7
Repair Parts List For R102N
Ref. Part No. For Model:
No. Description R102N Qty.
1 Retaining Ring 04259 1
2Bearing 04257 1
3 External Retaining Ring 04258 3
4Pump Body (Bronze or Brass) 18501 1
5* Mechanical Seal (B) and Seat (A) (Buna-N) Assembly 24834S 1
6Cam (Bronze or Brass) 10929 1
7Impeller (Nitrile, with Bronze, Brass or 300 Series SS insert) 19317S 1
Optional Impeller (Neoprene, with Bronze, Brass or 300 Series SS insert) 10615S 1
8Cam Screw (Bronze, Brass or Stainless Steel) 10515C 1
9Gasket (Vellumoid) 10931 1
10 Cover (Bronze or Brass) 10182 1
11 Bushing (Carbon Graphite) 06333 1
12 Shaft (300 Series Stainless Steel) 18502 1
13 Woodruff Key (303 Series Stainless Steel or Brass) 04432 1
14 Key - Square 21437 1
15 Dowel Pin 01311 2
16 Screw 17845 4
17 Lockwasher 12170 4
18 Drain Plug (Bronze, Brass or Stainless Steel) 00336 2
Repair Kit (consists of Ref. Nos. 5, 7, 9) 23664 1
(*) Mechanical seal/seat assembly with carbon ceramic faces and 18-8 Stainless Steel components.
Manufacturer reserves the right to change parts without notification.
Please provide following information:
-Model number
-Serial number (if any)
-Part description and number
as shown in parts list
To order parts, contact a SHURflo Distributor or
Order Direct.
Distributors can be found at www.shurfloindustrial.com.

Appendix 1 - Impeller Pump Inspection, Common Problems and Operation
1Aself-priming vacuum is created as the flexible impeller vanes straighten upon
leaving the cam, drawing liquid into the pump. 2The rotating impeller carries liquid from
the inlet to the outlet port.
As a consequence of their design, flexible
impeller pumps can pass fairly large solids.
3When the flexible impeller vanes regain contact with the cam, they bend and the
liquid is discharged from the pump in a
uniform flow.
Liquids can be pumped in the opposite direc-
tion by reversing the rotation of the pump.
Operation: How an Impeller Pump Works
Shurflo recommends replacing your impeller annually. Proper storage of the impellers during a prolonged lay-up can help
maintain the life of the impeller.
Remove the impeller from the housing and store it in a cool, dark place. This will avoid the following:
•Copper bonding of the impeller to the housing
•Vanes “setting” into position as stored in the housing
•Ultraviolet deterioration
Recommended inspection to be performed at any service interval:
Impeller . . . . . Inspect for cracks or tears. Also, inspect for excessive abrasion of vane ends.
Replace annually or if any of the conditions exist (see picture).
Wear Plate . . . . Inspect for wear,flatness, and pin for fatigue. Replace at minor
and major pump rebuild or if wear is evident to maintain
pump flow and suction performance.
Cam . . . . . . . . . Replace at major pump rebuild or if pitting/wear is evident.
Cover . . . . . . . . Replace at major pump rebuild or if wear exists to maintain
pump flow and suction performance.
Mechanical Seal Replace at minor and major pump rebuild or if leaking.
Lip Seal . . . . . . Replace at minor and major pump rebuild or if leaking.
Shaft . . . . . . . . . Inspect for wear in area of lip seal and rubber impeller. Grooving of
lip seal area or heavy fretting of the impeller end shaft will require shaft replacement.
Bearing . . . . . . Inspect for loss of grease, corrosion or rough rotation. Replace at major pump rebuild
or if in doubt.
Three tips to help you install your new Shurflo impeller:
•Use a non-petroleum-based lubricant (silicone or soapy water) to help slide the impeller into the housing.
•Install the impeller with a twisting motion onto the shaft. Never force an impeller onto the shaft.
•Impeller must be able to move freely on the shaft to properly prime and function.
(Use a small amount of non-petroleum-based lubricant to help hold the o-ring or gasket when replacing the cover.)
Ripped
Vane
Bead Worn
To A Flat
Pitting Cavitation
Bowed (set)
Tear
SHURflo Bronze Pedestal Self-Priming
Flexible Impeller Pumps
14
Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)

15
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
Form L-4095 (12/09)
Notes

Models R30GN, R50GN and R102N
SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
SHURflo warrants to the original purchaser of its products (the “Purchaser”) that such products will be free from defects in
material and workmanship under normal use for the period of six (6) months, and accessories will be free from defects in
material and workmanship under normal use for the period of ninety (90) days.
“Normal use” does not include use in excess of recommended maximum speeds, pressures, vacuums and temperatures, or
use requiring handling of fluids not compatible with component materials. This warranty does not cover freight damage,
freezing damage, normal wear and tear, or damage caused by misapplication, fault, negligence, alterations, or repair that
affects the performance or reliability of the product.
THIS WARRANTY IS EXCLUSIVE. SHURflo MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TOANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
SHURflo’s obligation under this warranty is, at SHURflo’s option, to either repair or replace the product upon return of the
entire product to the SHURflo factory in accordance with the return procedures set forth below. THIS IS THE EXCLUSIVE
REMEDY FOR ANY BREACH OF WARRANTY.
IN NO EVENT SHALL SHURflo BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND, WHETHER FOR
BREACH OF ANY WARRANTY, FOR NEGLIGENCE, ON THE BASIS OF STRICT LIABILITY, OR OTHERWISE.
Only authorized distributors can return products for Warranty. Contact your distributor or visit www.shurfloindustrial.com
to find a distributor for product support.
Distributors can obtain an RMA # and contact person’s name by contacting SHURflo’s customer service at 800-854-3218
(Ext. 6788 or Ext. 6651).
Return Procedures for Distributors
All pumps or products must be flushed of any chemical (ref. OSHA Section 0910.1200 (d)(e)(f)(g)(h) and hazardous chemicals
must be labeled before being shipped* to SHURflo for service or warranty consideration. SHURflo reserves the right to
request a Material Safety Data sheet from the Purchaser for any pump or product SHURflo deems necessary.SHURflo reserves
the right to “disposition as scrap” pumps or products returned which contain unknown substances, or to charge for any and
all costs incurred for chemical testing and proper disposal of components containing unknown substances. SHURflo requests
this in order to protect the environment and personnel from the hazards of handling unknown substances.
Be prepared to give SHURflo full details of the problem, including the following information:
1. Model number, purchase date and from whom you purchased your pump.
2. A brief description of the pump problem, including the following:
•Liquid pumped. State the pH and any non-soluble • Drive type (gas engine/electric motor; direct/belt drive;
materials, and give the generic or trade name. tractor PTO) and rpm of pump.
• Temperature of the liquid and ambient environment. • Viscosity (of oil, or other than water weight liquid).
•Suction lift or vacuum (measured at the pump). • Elevation from the pump to the discharge point.
•Discharge pressure. •Size and material of suction and discharge line.
•Size, type, and mesh of the suction strainer.
SHURflo may request additional information, and may require a sketch to illustrate the problem. Distributors should contact
the factory to receive a return material authorization before sending the product. All pumps returned for warranty work
should be sent shipping charges prepaid to:
[RMA# and Contact Person]
SHURflo
375 Fifth Avenue NW
New Brighton, Minnesota 55112
*Carriers, including U.S.P.S., airlines, UPS, ground freight, etc., require specific identification of any hazardous materials being shipped.
Failure to do so may result in a substantial fine and/or prison term. Check with your shipping company for specific instructions.
Limited Warranty on SHURflo Bronze Pedestal
Self-Priming Flexible Impeller Pumps
Form L-4095 (12/09)
Printed in USA
FLOW TECHNOLOGIES GROUP
5900 Katella Ave. • Cypress, CA 90630
Phone: [phone] • [phone] • Fax: [phone]
w
www.shurfloindustrial.com