Crane Barnes SGV 2 HP User manual

INSTALLATION and OPERATION MANUAL
Submersible Grinder Pump
Form No. 084843-Rev. F
Series: SGV 2 HP
3450 RPM
Series: SGV 3, 5, 7.5HP
3450 RPM
IMPORTANT: Read all instructions in this manual before operating pump.
As a result of Crane Pumps & Systems, Inc., constant product improvement program, product
changes may occur. As such Crane Pumps & Systems, Inc., reserves the right to change product
without prior written notification.
BARNES®
420 Third Street/P.O. Box 603 83 West Drive, Brampton
Piqua, Ohio 45356-0603 Ontario, Canada L6T 2J6
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
www.cranepumps.com
PUMPS & SYSTEMS
A Crane Co. Company
SUPERSEDED
Some parts may NOT
be available
Manual Index

TABLE OF CONTENTS
USER GUIDE ....................................................................................................................... 3
WARNINGS AND SAFETY PRECAUTIONS........................................................................ 4
A-1. PUMP SPECIFICATIONS- 2HP ......................................................................................... 5
A-2. PUMP SPECIFICATIONS- 3, 5, 7.5HP ............................................................................... 6
B. GENERAL INFORMATION .................................................................................................. 7
C. INSTALLATION .................................................................................................................... 7 - 8
D. SERVICE and REPAIR......................................................................................................... 8 - 15
TROUBLESHOOTING.......................................................................................................... 16
E. REPLACEMENT PARTS...................................................................................................... 17
CROSS-SECTION 2 HP SGV (Fig. 10) ............................................................................... 18
EXPLODED VIEW 2 HP SGV (Fig. 11) ............................................................................... 19
PARTS LIST--2HP SGV ....................................................................................................... 20 - 22
CROSS-SECTION 3,5,7.5 HP SGV (Fig. 12) ....................................................................... 23
EXPLODED VIEW 3,5,7.5 HP SGV (Fig. 13) ....................................................................... 24
PARTS LIST--3, 5,7.5HP SGV ............................................................................................. 25 - 27
ELECTRICAL DATA ............................................................................................................. 28
BREAKER & HEATER DATA ............................................................................................... 28
SUSPENDED SYSTEMS ..................................................................................................... 29
MOVEABLE For BASIN PACKAGE ..................................................................................... 30 - 31
WARRANTY INFORMATION ....................................... ........................................................ 33
WARRANTY
START-UP REPORTS
WARRANTY REGISTRATION
SPECIAL TOOLS AND EQUIPMENT
INSULATION TESTER (MEGGER), DIELECTRIC TESTER
CUTTER KIT (see parts list), SOCKET SET
ALLEN WRENCH SET, 1/2" OPEN END WRENCH
CRECENT WRENCH, SCREWDRIVER
HAMMER OR MALLET
Other brand and product names are trademarks or registered trademarks of their respective holders.
® Viton is a registered trademark of E.I. DuPont de Nemours and Company.
® Barnes is a registered trademark of Barnes Pumps, Inc.
© Barnes Pumps, Inc. 1991, 2002 Alteration Rights Reserved. Printed in U.S.A.
2

Congratulations on your purchase of a
Barnes UltraGRINDgrinder pump
system. With proper care and by following a
few simple guidelines your grinder pump will
give you many years of dependable service.
Use and Care
The UltraGRIND grinder pump station is
designed to handle routine, domestic
sewage. Solid waste materials should be
thrown in the trash. While your station is
capable of accepting and pumping a wide
range of materials, regulatory agencies
advise that the following items should not be
introduced into any sewer either directly or
through a kitchen waste disposal:
•Glass
•Metal
•Diapers
•Socks, rags or cloth
•Plastic objects (e.g., toys, utensils, etc.)
•Sanitary napkins or tampons
In addition you must NEVER introduce into
any sewer:
•Explosives
•Flammable Material
•Lubricating Oil and/or Grease
•Strong Chemicals
•Gasoline
General Information
Your home wastewater disposal service is
part of a low pressure sewer system. The
key element in this system is the Barnes
UltraGRIND grinder pump station. The basin
collects all wastewater from the house. The
solids in the sewage are then ground to a
small size suitable for pumping in the slurry.
The grinder pump generates sufficient
pressure to pump this slurry from your home
to the wastewater plant.
Power Failure
Your grinder pump cannot dispose of
wastewater or provide an alarm signal
without electrical power. If electrical power
service is interrupted, keep water usage to
a minimum.
Warranty
Your grinder pump is furnished with a
warranty against defects in material or
workmanship. A properly completed Start
Up/Warranty Registration form must be on
file at the Barnes factory in order to activate
your warranty. In addition your pump must
be installed in accordance with the
installation instructions.
If you have a claim under the provisions of
the warranty, contact your local Barnes
Pumps, Inc. Distributor.
When contacting your representative for
service, please include your station serial
number, pump model number, and pump
serial number.
For future reference, record the following
information:
Station Serial No:
Pump Model No:
Pump Serial No:
Local Distributor:
Distributor Telephone:
USER GUIDE
3

SAFETY FIRST!
PLEASE READ THIS BEFORE INSTALLING
OR OPERATING PUMP.
GENERAL
1. Most accidents can be avoided by using COMMON SENSE.
2. Read this operation and maintenance instruction manual.
3. Do not wear loose clothing that may become entangled in the impeller or other moving parts.
4. Always wear appropriate safety gear, such as safety glasses, when working on the pump or piping.
5. Bronze/brass and bronze/brass fitted pumps may contain lead levels higher than considered safe for potable water systems.
Various government agencies have determined that leaded copper alloys should not be used in potable water applications.
For non-leaded copper alloy materials of construction, please contact factory.
6. Minimize the amount of cooking grease entering the system.
7. Do Not leave pump cover off the basin, except while servicing, to prevent entrance of foreign materials such as rocks, metal,
soil, animals or humans.
8. Prevent large articles of clothing, large amounts of chemicals, other materials or substances such as are uncommon in
domestic sewage from entering the system.
9. During power black-outs, discontinue water consumption at the home(s) to prevent sewage from backing up into the house.
10. Prevent infiltration or direct flow of rain or run-off water into the pump basin to minimize pump cycling. This will prevent
overloading the treatment facility, and will facilitate swift transportation of sewage.
11. Always keep the shut-off valve completely open when system is in operation (unless advised otherwise by the proper authorities).
12. Keep the control panel locked or confined to prevent unauthorized access to it.
13. If the pump is idle for long periods of time, it is advisable to start the pump occasionally by adding water to the basin.
14. Before removing the pump from the basin, be sure to close the shut-off valve. (This prevents backflow from the pressure sewer.)
15. Make sure level controls are provided at time of installation.
PUMPS
16. Recommended no more than 10 starts per hour.
17. Pumps build up heat and pressure during operation-allow time for pumps to cool before handling or servicing.
18. Only qualified personnel should install, operate and repair pump.
19. Keep clear of suction and discharge openings. DO NOT insert fingers in pump with power connected.
20. Do not pump hazardous materials (flammable, caustic, etc.) unless the pump is specifically designed and designated to handle
them.
21. Do not block or restrict discharge hose, as discharge hose may whip under pressure.
22. Make sure lifting handles are securely fastened each time before lifting.
23. Do not lift pump by the power cord.
24. Do not exceed manufacturers recommendation for maximum performance, as this could cause the motor to overheat.
25. Secure the pump in its operating position so it can not tip over, fall or slide.
26. Keep hands and feet away from impeller when power is connected.
27. Submersible Pumps are not approved for use in swimming pools, recreational water installations, decorative fountains or any
installation where human contact with the pumped fluid is common.
28. Do not operate pump without safety devices in place.
29. Always replace safety devices that have been removed during service or repair.
ELECTRICAL
30. To reduce risk of electrical shock, pump must be properly grounded in accordance with the National Electric Code (NEC) or the
Canadian Electrical Code (CEC) and all applicable state, province and local codes and ordinances.
31. To reduce risk of electrical shock, always disconnect the pump from the power source before handling or servicing. Lock out
power and tag
32. Any wiring of pumps should be performed by a qualified electrician.
33. Never operate a pump with a power cord that has frayed or brittle insulation.
34. Cable should be protected at all times to avoid punctures, cut, bruises and abrasions - inspect frequently.
35. Never handle connected power cords with wet hands.
36. Do not remove cord and strain relief. Do not connect conduit to pump.
37. To reduce risk of electrical shock, all wiring and junction connections should be made per the NEC or CEC and applicable state,
province and local codes. Requirements may vary depending on usage and location. See wiring diagrams in manual.
38. Do Not operate the pump in the "HAND" control position and leave the pump unattended.
IMPORTANT! BARNES® PUMPS, INC. IS NOT RESPONSIBLE FOR LOSSES, INJURY, OR DEATH RESULTING FROM A
FAILURE TO OBSERVE THESE SAFETY PRECAUTIONS, MISUSE OR ABUSE OF PUMPS OR EQUIPMENT.
4

SECTION: A-1 - PUMP SPECIFICATIONS- SERIES: SGV 2 HP
DISCHARGE: 1-1/4" (32mm) NPT, Vertical
LIQUID TEMPERATURE: 160°F (71°C) Intermittent
VOLUTE: Cast iron ASTM A-48, Class 30.
MOTOR HOUSING: Cast iron ASTM A-48, Class 30.
SEAL PLATE: Cast iron ASTM A-48, Class 30.
IMPELLER:
Design: 10 vane, vortex, with pump out
vanes on back side. Dynamically
Balanced, ISO G6.3.
Material: 85-5-5-5 Bronze
SHREDDING RING: Hardened 440C stainless steel,
Rockwell C-55.
CUTTER: Hardened 440C stainless steel,
Rockwell C-55.
SHAFT: 416 stainless steel
SQUARE RINGS: Buna-N
HARDWARE: 300 series stainless steel
PAINT: Air dry enamel. Top coat.
SEAL: Design: Tandem mechanical, oil filled
reservoir.
Material: Rotating faces - carbon
Stationary faces - ceramic
Elastomer - Buna-N
Hardware -300 series stainless
CABLE ENTRY: 15ft. (4.5M) cord. Pressure
grommet for sealing and strain
relief.
SPEED: 3450 RPM (nominal).
UPPER BEARING:
Design: Single row, ball
Lubrication: Oil
Load: Radial
INTERMEDIATE BEARING:
Design: Single row, ball
Lubrication: Oil
Load: Radial & thrust
LOWER BEARING:
Design: Sleeve
Lubrication: Oil
Load: Radial
MOTOR: Design: NEMA L-single phase,
NEMA B-three
Phase torque curve.
Completely oil-filled,
Squirrel cage induction.
Insulation: Class B
SINGLE PHASE: Capacitor start/capacitor run. requires overload
protection to be included in control panel. Requires Barnes®starter
or control panel which includes capacitors, or capacitor pack.
THREE PHASE: Dual voltage 230/460; Requires overload protection
to be included in control panel.
OPTIONAL EQUIPMENT: Seal material, impeller trims, 12 vane
impeller, moisture sensors (requires relay in panel), additional cable,
CSA listed with SOW-A cables.
WEIGHT: 110 lbs.
inches
(mm)
19.69
(500)
3.87
(98)
11.30
(287)
5.55
(141)
4.63
(118)
9.25
(235)
1-1/4" (32) NPT.
DISCH.
1.13
(29)
5

SECTION: A- 2 - PUMP SPECIFICATIONS- SERIES: SGV 3, 5 & 7.5 HP
DISCHARGE: 2" (51mm) NPT, Vertical
LIQUID TEMPERATURE: 160°F (71°C) Intermittent
VOLUTE: Cast iron ASTM A-48, Class 30.
MOTOR HOUSING: Cast iron ASTM A-48, Class 30.
SEAL PLATE: Cast iron ASTM A-48, Class 30.
IMPELLER:
Design: 12 vane,vortex, with pump out
vanes on back side. Dynamically
balanced, ISO G6.3.
Material: 85-5-5-5 Bronze
SHREDDING RING: Hardened 440C stainless steel
Rockwell C-55.
CUTTER: Hardened 440C stainless steel,
Rockwell C-55.
SHAFT: 416 stainless steel
SQUARE RINGS: Buna-N
HARDWARE: 300 series stainless steel
PAINT: Air dry enamel. Top Coat.
SEAL: Design: Tandem mechanical, oil filled
reservoir.
Material: Rotating faces - carbon
Stationary faces - ceramic
Elastomer - Buna-N
Hardware -300 series stainless
CABLE ENTRY: 25ft. (8M) cord. Pressure grommet
for sealing and strain relief.
SPEED: 3450 RPM (nominal).
UPPER BEARING:
Design: Single row, ball
Lubrication: Oil
Load: Radial
INTERMEDIATE BEARING:
Design: Single row, ball
Lubrication: Oil
Load: Radial & thrust
LOWER BEARING:
Design: Sleeve
Lubrication: Oil
Load: Radial
MOTOR: Design: NEMA L-single phase,
NEMA B-three phase,
torque curve. Completely
oil-filled, squirrel cage
induction.
Insulation: Class F.
SINGLE PHASE: Capacitor start/capacitor run. Requires overload
protection to be included in control panel. Requires Barnes® starter or
control panel which includes capacitors, or capacitor pack.
THREE PHASE: Dual votage 230/460; Requires overload protection to
be included in control panel.
OPTIONAL EQUIPMENT: Seal material, impeller trims, moisture
sensors (requires relay in control panel), additional cable, CSA listed
with SOW-A cables.
WEIGHT: 190 lbs.
inches
(mm)
28.25
(718)
4.43
(113)
7.50
(191)
4.56
(116)
9.12
(232)
2" (51) NPT
DISCH.
1.50 (38)
13.56 (344)
6

SECTION B: GENERAL INFORMATION
B-1) To the Purchaser:
Congratulations! You are the owner of one of the finest
pumps on the market today. Barnes®Pumps are products
engineered and manufactured of high quality components.
Over one hundred years of pump building experience along
with a continuing quality assurance program combine to
produce a pump which will stand up to the toughest
applications.
This Barnes Pumps, Inc. manual will provide helpful
information concerning installation, maintenance, and
proper service guidelines.
B-2) Receiving:
Upon receiving the pump, it should be inspected for damage
or shortages. If damage has occurred, file a claim
immediately with the company that delivered the pump. If the
manual is removed from the packaging, do not lose or
misplace.
B-3) Storage:
Short Term- Barnes Pumps are manufactured for efficient
performance following short inoperative periods in storage.
For best results, pumps can be retained in storage, as factory
assembled, in a dry atmosphere with constant temperatures
for up to six (6) months.
Long Term- Any length of time exceeding six (6) months,
but not more than twenty-four (24) months. The units should
be stored in a temperature controlled area, a roofed over
walled enclosure that provides protection from the elements
(rain, snow, wind-blown dust, etc.), and whose temperature
can be maintained between +40 deg. F and +120 deg. F.
(4.4 - 49°C) If extended high humidity is expected to be a
problem, all exposed parts should be inspected before
storage and all surfaces that have the paint scratched,
damaged, or worn should be recoated with a water base, air
dry enamel paint. All surfaces should then be sprayed with
a rust-inhibiting oil.
Pump should be stored in its original shipping container. On
initial start up, rotate impeller by hand to assure seal and
impeller rotate freely. If it is required that the pump be
installed and tested before the long term storage begins,
such installation will be allowed provided:
1.) The pump is not installed under water for more than
one (1) month.
2.) Immediately upon satisfactory completion of the test,
the pump is removed, thoroughly dried, repacked in the
original shipping container, and placed in a temperature
controlled storage area.
B-4) Service Centers:
For the location of the nearest Barnes Pumps Service
Center, check your Barnes Engineered catalog, your Barnes
Pumps, Inc. representative or Barnes Pumps, Inc. Service
Department in Piqua, Ohio, telephone [phone] or
Crane Pumps & Systems Canada, in Brampton, Ontario,
[phone].
SECTION C: INSTALLATION
C-1) Location:
The pump is designed to fit into your basin either by sliding
down the rail assembly or by being mounted on a ring base.
THIS PUMP MUST BE INSTALLED WITH A MINIMUM OF
3 INCHES OF CLEARANCE UNDER THE PUMP FOR THE
ENTRANCE OF SEWAGE SOLIDS.
Package Systems (Not Shown)- The package system
comes complete and ready to place into the ground as
outlined in the project specifications. The moveable portion of
the Break Away Fitting (BAF), check valve, piping and guide
bracket comes assembled on the pump along with the lifting
rope or can be assembled from a moveable kit for the pump
model specified. On units with rail assemblies insert pump
bracket and moveable portion of BAF into the guide channel
and lower pump into basin (DO NOT DROP). On units without
rail assemblies, mount pump on ring base with (3) bolts.
Connect discharge hose assembly and bracket. Once
assembled, unit can be lowered into basin (DO NOT DROP).
Now connect power and control cables to the junction box or
control panel depending on system design.
Standard ON
Position
Fig. 1
10"
Standard OFF
Position
Bottom of Basin
12"
4"
Standard ALARM
Position
7

C-3) Electrical Connections:
WARNING ! - All model pumps and control
panels must be properly grounded per The
National Electric Code or The Canadian Electrical
Code, State, Province and Local Codes. improper
grounding voids warranty.
C-3.1) Power & Control Cables:
The cord assembly mounted to the pump must NOT be
modified in any way except for shortening to a specific
application. Any splice between the pump and the control
panel must be made in accordance with the National
Electric Code or the Canadian Electric Code and all
applicable state, province and local electric codes. It is
recommended that a junction box, be mounted outside the
sump or be of at least Nema 4 (EEMAC-4) construction if
located within the wet well.
Do not use the power or control cables to lift pump!
C-3.2) Thermal Protection:
The normally closed (N/C) over temperature sensor is
embedded in the motor windings and will detect excessive
heat in the event an overload condition occurs. The
thermal sensor will trip when the windings become too hot
and will automatically reset itself when the pump motor
cools to a safe temperature. It is recommended that the
thermal sensor be connected in series to an alarm device
to alert the operator of an overtemperature condition
and/or motor starter coil to stop pump. In the event of an
overtemperature, the source of this condition should be
determined and rectified immediately. Thermal protection
shall not be used as a motor overload device. A separate
motor overload device must be provided in accordance
with NEC codes. DO NOT LET THE PUMP CYCLE OR
RUN IF AN OVERLOAD CONDITION OCCURS !
If current through the temperature sensor exceeds the
values listed, an intermediate control circuit relay must be
used to reduce the current or the sensor will not work
properly.
TEMPERATURE SENSOR ELECTRICAL RATINGS
VOLTS CONTINUOUS
AMPERES
INRUSH
AMPERES
110-120 3.00 30.0
220-240 1.50 15.0
440-480 0.75 7.5
C-3.3) Moisture Sensors: (Optional)
A normally open (N/O) detector is installed in the pump
seal chamber which will detect any moisture present. It is
recommended that this detector be connected in series to
an alarm device or the motor starter coil to alert the
operator that a moisture detect has occurred. In the event
of a moisture detect, check the individual moisture sensor
probe leads for continuity, ( ∞ resistance = no moisture )
and the junction box/control box for moisture content. The
above situations may induce a false signal in the moisture
detecting circuit. If none of the above tests prove
conclusive, the pump(s) should be pulled and the source
of the failure identified and repaired. IF A MOISTURE
DETECT HAS OCCURRED SCHEDULE
MAINTENANCE AS SOON AS POSSIBLE.
C-3.4) Wire Size:
If additional cable is required consult a qualified electrician
for proper wire size. See Table on page 21 for further
electrical information.
SECTION D: SERVICE AND REPAIR
NOTE: All item numbers in ( ) refer to Figures 10 & 11 for
2HP and to Figures 12 & 13 for 3.0, 5.0 & 7.5HP Pumps.
WARNING !
ELECTRICAL POWER TO THE PUMP MOTORS
MUST BE DISCONNECTED AND LOCKED OUT TO
PREVENT ANY DANGEROUS ELECTRICAL
HAZARDS OR PERSONNEL DANGER BEFORE ANY
SERVICE WORK IS DONE TO THE PUMP.
CAUTION !
OPERATING PUMP BUILDS UP HEAT AND
PRESSURE; ALLOW TIME FOR PUMP TO COOL TO
ROOM TEMPERATURE BEFORE HANDLING OR
SERVICING.
CAUTION !
ALWAYS WEAR EYE PROTECTION WHEN
WORKING ON PUMPS.
8

D-1) Lubrication:
Anytime the pump is removed from operation, the cooling
oil in the motor housing (10) should be checked visually for
oil level and contamination.
D-1.1) Checking Oil:
Motor Housing- To check oil, set unit upright. On 2HP
Pumps, remove gland nut (15b) (see Fig. 9) from hex nut
(49) (see Fig 11). Unscrew hex nut (49) from motor housing
(10). DO NOT disconnect wiring from motor leads. On 3, 5
& 7.5HP Pumps remove pipe plug (36) from cover plate
(13). With a flashlight, visually inspect the oil in the motor
housing (10) to make sure it is clean and clear, light amber
in color and free from suspended particles. Milky white oil
indicates the presence of water. Oil level should be 1" above
motor, see Fig. 10 & 12, when pump is in vertical position.
D-1.2) Testing Oil:
1. Place pump on its side, remove pipe plug (24) on
2HP Pumps or pipe plug (36), from cover plate (13)
on 3, 5, 7.5HP Pumps and drain oil into a clean, dry
container.
2. Check oil for moisture contamination using a high
potential oil tester with a range to 30 Kilovolts breakdown.
3. If oil is found to be clean and uncontaminated
(measure above 15 KV. breakdown), refill the motor
housing as per section E-1.3.
4. If oil is found to be dirty or moisture contaminated
(or measures below 15 KV. breakdown), the pump
must be carefully inspected for leaks at the shaft
seals (5) & (21), cable assembly (15) & (16), and pipe
plugs (24), on 2HP pumps, and (36), O-rings (8), (14)
on 3, 5, 7.5HP pumps, (20) & (29), before refilling with oil.
To locate the leak, perform a pressure test as per
section D-1.4. After leak is repaired, refill with new oil
as per section D-1.3.
WARNING !
DO NOT OVERFILL OIL. OVERFILLING OF MOTOR
HOUSING WITH OIL CAN CREATE EXCESSIVE AND
DANGEROUS HYDRAULIC PRESSURE WHICH CAN
DESTROY THE PUMP AND CREATE A HAZARD.
OVERFILLING OIL VOIDS WARRANTY.
D-1.3) Replacing Oil:
Motor Housing- Drain all oil from motor housing and
dispose of properly. Set unit upright and refill with new
cooling oil as per Table 1. (See parts list for amount.) Fill to
the 1" above motor as an air space must remain in the top
of the motor housing to compensate for oil expansion (see
Cross-sections Fig. 10 & 12). On 2HP pumps apply pipe
thread compound to threads of hex nut (49) and pipe plug
(24) then assemble to motor housing (10). Insert friction ring
(15c), grommet (15d), another friction ring (15c), and gland
nut (15b) into hex nut (49) and torque to 15 ft. lbs. Or on 3,
5, 7.5HP pumps apply pipe thread compound to threads of
pipe plug (36), then assemble to cover plate (13).
Seal Chamber- Set unit on its side with fill plug (36)
downward, (located on intermediate coupling 6), remove
plug (36) and drain all oil from seal chamber. Set unit on its
side, with plug (36) upward, and refill completely with new
oil as per Table 1. (See parts list for amount.) Apply pipe
thread compound to threads of pipe plug (36) and assemble
to intermediate coupling (6).
TABLE 1 - COOLING OIL - Dielectric
SUPPLIER GRADE
BP Enerpar SE100
Conoco Pale Paraffin 22
Mobile D.T.E. Oil Light
G & G Oil Circulating 22
Imperial Oil Voltesso-35
Shell Canada Transformer-10
Texaco Diala-Oil-AX
CAUTION !
PRESSURE BUILDS UP EXTREMELY FAST,
INCREASE PRESSURE BY "TAPPING" AIR NOZZLE.
TOO MUCH PRESSURE WILL DAMAGE SEAL. DO
NOT EXCEED 10 P.S.I.
D-1.4) Pressure Test:
Motor Housing- Before checking the pump for leaks around
the shaft seal, square rings, and cord inlet, the oil level
should be full as described in section D-1.3. Remove pipe
plug (24) from motor housing (10) on 2HP pumps or (36)
from cover plate (13) on 3,5,7.5HP pumps. Apply pipe
sealant to pressure gauge assembly and tighten into hole
(see Fig. 3). Pressurize motor housing to 10 PSI. Use a soap
solution around the sealed areas and inspect joints for "air
bubbles." If, after five minutes, the pressure is still holding
constant, and no "bubbles" are observed, slowly bleed the
pressure and remove the gauge assembly. Replace the pipe
plug (36) using a sealant. If the pressure does not hold, then
the leak must be located and repaired.
Seal Chamber- Remove pipe plug (36) from intermediate
coupling (6) and check that the seal chamber is full of oil.
Apply pipe sealant to pressure gauge assembly and tighten
into hole in intermediate coupling (6). Pressurize seal
chamber to 10 P.S.I. and check for leaks as outlined above.
10 PSI
AIR ⇓
Pressure Gauge Ass’y
(See Parts List)
Fig. 3
Remove Plug
⇒
10 PSI AIR
9

D-2) Impeller, Cutters and Volute Service
D-2.1) Disassembly and Inspection:
To obtain access to the impeller (23) or shredding ring (25),
first remove screw (35) and washer (34). Then holding the
motor shaft stationary with a screwdriver, tap the radial
cutter (32) loose in the counter-clockwise direction and
remove. (Heat may be needed to break the screw (35)
loose.)
Next remove nuts (30) and washers (11) from stud (31) and
pull the body (28) and square rings (29) on 2HP and (20)
on 3, 5, 7.5HP, from the rest of the pump. Remove shims
(33) from shaft, then impeller (23) can be removed by
turning it counter-clockwise while holding stationary the
motor shaft with a screwdriver. NOTE: With the impeller
(23) removed, the seal spring is relaxed and some oil may
seep from the seal cavity. DO NOT store this pump without
the impeller (23) in place to hold the seal shut.
To remove or reverse the shredding ring (25) first remove
the three flat head allen screws (27) and lift the throat (26)
out of the body (28). The shredding ring (25) is press fitted
in the body (28) and must be removed with an arbor press.
After a number of years of service or whenever the
shredding ring (25) cutting edges dull, the part can be
pressed out of the body (28) and reversed to utilize the
opposite cutting edges and then be replaced in the body
(28). To maintain efficient grinder pump operation, care
should be taken to keep both the radial cutter (32) and
shredding ring (25) cutting edges sharp. Neither part can
be sharpened to renew the cutting ability. The radial cutter
(32) must be replaced and the shredding ring either
reversed or replaced.
D-2.2) Reassembly:
To replace impeller (23) on shaft, turn clockwise while
holding shaft stationary with a screwdriver. Then replace
shims (33) on motor shaft. Important that the same quantity
be replaced as removed.
Next install shredding ring (25) by pressing into body (28)
with the use of an arbor press. Then insert throat (26) into
body (28) with three flat head allen screws (27). Apply a
thin coat of petroleum jelly to the square ring (29) on 2 HP
and (20) on 3, 5, 7-1/2 HP, and place on body (28). Place
motor assembly on body (28), being careful not to damage
square rings (20) & (29). Place washers (11) and nuts (30)
on studs (31) and tighten. Screw radial cutter (32) on shaft
clockwise. Hold motor shaft stationary with screwdriver and
tighten. Then replace washer (34) and screw (35). Radial
cutter (32) should be flush with shredding ring (25) on
suction side to within ±.020.
D-3) OUTER SHAFT SEAL SERVICE:
CAUTION !
HANDLE SEAL PARTS WITH EXTREME CARE. DO
NOT SCRATCH OR MAR LAPPED SURFACES.
D-3.1) Disassembly and Inspection:
Outer Seal- To expose shaft seal (21) for examination
disassemble volute, cutter and impeller as outlined in
paragraph D-2.1. Drain oil from seal cavity as outlined in
paragraph D-1.3. To inspect seal further, remove retaining
ring (21d), spring (21c) and rotating member (21b) from
shaft (see Figure 4).
PUMP END
(OUTBOARD END)
MOTOR END
(INBOARD END)
SEAL
ASSEMBLY (21)
Seal Plate (19)
Intermediate (6)
Spring (5c)
Rotating Member (5b)
Stationary (5a)
Fig. 4
Retaining Ring (5d)
SEAL
ASSEMBLY (5)
PUMP END
(OUTBOARD END)
MOTOR END
(INBOARD END)
Fig. 5
Stationary (21a)
Rotating
Member (21b)
Retaining Ring (21d)
Spring (21c)
10