Operating Instructions & Parts Manual 020598 and 020599
Please read and save these instructions. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.
Self-Priming Engine-Driven
Centrifugal Pumps
Description
These centrifugal pumps include a precision mechanical seal with stainless steel
spring, EPDM seals, carbon face and ceramic seat, and a built-in check valve for
better self-priming capabilities (up to 20 ft. suction lift). Clog resistant impeller is
capable of handling solids up to 7/16" diameter. Pumps include molded carrying
handle, rubber foot pads, and two 2" NPT pipe nipples. Handle liquids from 40º to
130º F (4º to 54º C). For use with nonflammable, non-abrasive liquids compatible
with pump component materials.
Applications include pumping clear, clean water, salt water, and some liquid fertilizers and herbicides. An optional Buna N Seal/O-ring/Flapper Kit (see Repair Parts
List) is available for pumping additional liquids. If the liquid is not compatible with
Buna-N (optional) or EPDM (standard) rubber materials, do not use these pumps.
Specifications
Suction inlet . . . . . . . . . . . . . . . . . . 2" †
Discharge outlet . . . . . . . . . . . . . . . 2" †
(†) Standard NPT (female) pipe thread.
Dimensions (overall)
020598 . . . . . . . . 13" H x 15" W x 18" L
020599 . . . . . . . . . 18
Engine
020598 . . . . . . . . . . . . . . . . . 3.5 HP B&S
020599 . . . . . . . . 5.5 HP B&S OHV Intek
Oil type . . . . . . . . . SAE 30W Detergent
Weight
020598 . . . . . . . . . . . . . . . . . . . . 38 lbs.
020599 . . . . . . . . . . . . . . . . . . . . 43 lbs.
Material . . . . Glass-filled p
3
⁄8L x 173⁄8W x 151⁄4H
olypropylene
Safety Guidelines
Failure to follow any
warnings/ cautions
can result in personal injury, pump damage, and/or property damage.
This manual contains information that
is very important to know and under-
3824-254-00 FW0520 0703 Supercedes NEW
stand. This information is provided for
SAFETY and to PREVENT EQUIPMENT
PROBLEMS. To help recognize this
information, observe the following
symbols:
Danger indicates an
imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
Warning indicates a
potentially hazardous situation which, if not avoided,
COULD result in death or serious injury.
Caution indicates a
potentially hazardous situation which, if not avoided,
MAY result in minor or moderate injury.
NOTE: Indicates important information
that, if not followed, may cause damage to equipment.
Unpacking
After unpacking the unit, inspect carefully for any damage that may have
occurred during transit. Make sure to
tighten fittings, bolts, etc., before putting unit into service.
7/2003
Operating Instructions and Parts Manual
020598 and 020599
Self-Priming Engine-Driven
Centrifugal Pumps
Unpacking (continued)
Do not operate unit
if damaged during
shipping, handling or use. Damage may
cause injury or property damage.
General Safety Information
1. Know the pump application, limita-
tions, and potential hazards. Read all
manuals included with this product
carefully. Be thoroughly familiar with
the pump and the proper use of the
equipment.
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. Pump should only be used
with liquids compatible with pump
component materials. Failure to follow
this warning can result in death, serious
personal injury and/or property damage.
2. Make certain that the power source
(gas engine) conforms to the requirements of your equipment.
3. Provide adequate protection and
guarding around moving parts.
4. Release all pressure within the system
before servicing any component.
5. Drain all liquids from the system
before servicing.
6. Secure the discharge line before
starting the pump. An unsecured discharge line will whip, possibly causing personal injury and/or property
damage.
7. Check hoses for weak or worn condition before each use, making certain
that all connections are secure.
8. Periodically inspect pump and system
components. Perform routine maintenance as required (See
Maintenance section).
9. Provide a means of pressure relief
for pumps whose discharge line can
be shut-off or obstructed.
10. Personal Safety:
a. Wear safety glasses at all times
when working with pumps.
b. Wear a face shield and proper
apparel when pumping hazardous
chemicals.
c. Keep work area clean, uncluttered
and properly lighted; replace all
unused tools and equipment.
d. Keep visitors at a safe distance
from the work area.
e. Make workshop child-proof – with
padlocks, master switches, and by
removing starter keys.
11. Carefully read instruction manuals
supplied by engine manufacturer
before attempting to assemble,
operate, or service the engine or
any part. The WARNING statements
indicate potentially hazardous conditions for operator or equipment.
TAKE NECESSARY STEPS TO PROTECT PERSONNEL AND EQUIPMENT.
Gasoline is a highly
combustible fuel.
The improper use, handling, or storage
of gasoline can be dangerous. Prevent
accidents by following these safety
rules:
a. Use gasoline only as fuel, neveras a
cleaning fluid.
b. Use only an approved container to
hold or store gasoline. Never store
gasoline in familiar containers such
as milk containers or soda pop bottles.
c. Store gasoline in a cool location,
out of reach of children. Never
store gasoline near heat or an
open flame.
d. Add gasoline to a cool engine only.
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Operating Instructions and Parts Manual
Models 020598 and 020599
General Safety (continued)
Spilled gasoline on a hot engine
may cause fire or an explosion. Fill
gasoline tank out-of-doors and
wipe up any spills.
e. Provide a fire extinguisher nearby
when working with gasoline. Be
sure extinguisher is in operating
condition – check the pressure
gauge or indicator. Be familiar
with its proper use. Consult local
fire department for the correct
type of extinguisher for your application. Extinguishers rated ABC by
the National Fire Protection
Association are appropriate for
most applications.
IMPORTANT: Positively no smoking!
12. DO NOT RUN THE ENGINE IN AN
ENCLOSED AREA!! Exhaust fumes
contain carbon monoxide which is
an odorless and poisonous gas. If
equipment is located in an enclosed
area, use an exhaust line to the outside and regularly check the exhaust
system for leaks. Be sure the area is
well ventilated.
13. Check engine oil and fuel levels
before initial start up each day. Stay
away from moving parts. Avoid
wearing loose jackets, shirts, and
ties. Make sure all nuts and bolts
are secure. Keep power shields and
guards in place. If adjustments must
be made while the unit is running,
use extreme caution around hot
manifolds, moving parts, etc.
14. Do not operate this equipment
when mentally or physically
fatigued.
Be careful not to
touch the exterior of
the engine, especially the muffler and
the surrounding area. The engine is hot
enough to be painful or cause injury!
15. Prevent accidental starting by
always removing spark plug or by
disconnecting and grounding spark
plug wire before working on engine
or the equipment driven by engine.
16. Familiarize yourself with all controls. Learn how to stop an engine
quickly in an emergency.
17. Keep the equipment and surrounding area clean. Remove all oil
deposits from equipment and surrounding area. Accumulations of
grease and oil may present a fire
hazard and can cause engine damage. Cleaning rags and other flammable waste materials must be
stored in approved metal containers.
18. All visitors should be kept at a safe
distance from the working area.
Keep children away from power
equipment. Keep work area clean.
Cluttered areas invite accidents.
19. When shutting off a gasoline
engine, be sure it is completely
stopped before leaving the work
area.
Installation
IMPORTANT: For installations where
property damage might result from an
inoperative or leaking pump due to
power outages, discharge line blockage
or any other reason, a back-up
system(s) and/or warning system(s)
should be used.
1. Locate pump as close to the fluid
source as possible, making the suction line as short and direct as possible.
The unit should be
placed where the
pump/engine is protected from the
weather and extremes of heat, cold and
humidity.
3
Operating Instructions and Parts Manual
020598 and 020599
Self-Priming Engine-Driven
Centrifugal Pumps
Installation (continued)
2. Mount the unit on a solid foundation. On fixed installation, install
both a union and a gate valve (not
furnished) on the discharge side of
the pump for service convenience.
Do not use a globe
or other restricting
type of valve at the discharge, as this
would seriously restrict the capacity of
the pump.
3. Attach suction line piping to the suc-
tion inlet and discharge line piping
to the discharge outlet. The suction
line should be positioned such that
there is a continual upward slope
from the fluid source to the pump.
Avoid using loops or sections of pipe
or fittings which might permit air to
become trapped.
IMPORTANT: If plastic or fabric hose is
used for the suction piping, it should
be of a reinforced type so as not to collapse under suction. The discharge piping should be at least the same size as
the discharge connection. Suction piping should be the same size as the discharge piping or one size larger. Unless
long horizontal runs are involved, discharge piping should not be larger
than suction piping. Avoid using
looped sections of pipe which might
permit air to become entrapped. Assure
air-tight pipe connections with the use
of a pipe joint sealant.
4. A foot-valve may be used on the
suction line to assist in faster pumping. The foot-valve should be
installed when the suction lift is over
10 feet or when the suction line is
over 10 feet long.
5. A suitable suction strainer should be
attached to the suction line so that
large pieces of foreign material are
not drawn into the pump. The maximum opening in the suction strainer
should not be greater than 25% of
the suction inlet size for solid handling pumps and 50% of the suction
inlet size for trash pumps.
Operation
1. Fill the engine crankcase with oil as
specified in the engine manual. If the
engine has no dipstick, then fill the
crankcase with oil until the oil overflows (starts spilling out of the
crankcase). Periodically check oil level
thereafter.
2. Fill the gasoline tank as required.
Refer to engine instruction booklet.
Never add gasoline
to a hot engine!
See General Safety Information for
proper handling of gasoline.
3. Fill the pump with liquid through the
pump discharge or the priming port
supplied with these units. It may be
convenient to screw in a service tee
or a tee with a nipple into the discharge, so that the pump can be
filled (using the upper leg of the tee)
without disconnecting the discharge
hose or pipe. The vertical leg must be
closed with a pipe plug during
pumping. Remember, the pump is
self-priming only when the pump
casing has been filled. The pump
should prime and re-prime without
refilling. Refilling is necessary occasionally if an unusual siphoning has
occurred, if the fluid has been lost by
evaporation, and when the unit is
moved to a new location.
Do not run pump
dry, as permanent
damage to the mechanical seal will
result.
4. Start the engine, following instruc-
tions in the engine manual.
5. With a suction lift of 5 to 10 feet, the
pump should discharge liquid within
4
Operating Instructions and Parts Manual
Models 020598 and 020599
Operation (continued)
one or two minutes. A suction lift of
20 feet can take 5 minutes running
time to pick up a prime. If pumping
does not start within this time, shut
off the engine, let unit cool down
about 5 minutes, refill pump casing
and retry. If engine does not start,
refer to Engine Manual. If pump
does not prime after 2 tries, refer to
“Troubleshooting Chart” in this manual.
6. Properly fueled and lubricated, the
pump/engine unit will run automatically without attention to the controls. The gasoline engine has a builtin governor and will adjust the speed
of the engine automatically depending on the volume of water being
delivered.
Even though this
unit will operate
with minimal supervision, it should not
be left operating by itself. Depending
on the application and area unit is operating (high traffic, people in area, etc.)
will dictate the necessity of having
someone watching over the unit.
Maintenance
To prevent acciden-
tal starting always
remove spark plug, or disconnect and
ground spark plug wire before attempting to service or remove any component.
1. If the pump is located in an area sub-
ject to freezing temperature, the
pump should be drained when not in
operation. Also, the pump should be
flushed after each use.
2. Clean the suction line strainer at regular intervals.
3. If the gas engine is equipped with a
spark arrestor screen in the muffler,
it should be inspected for wear periodically, and replaced when necessary.
NOTE: For information pertaining to
the engine and engine parts, consult
the Engine Manual or contact the nearest authorized service representative or
the manufacturer.
4. Periodically check nuts and bolts on
engine, mounting frame and pump.
Since this is a gas engine pump,
vibration levels tend to loosen nuts
and bolts faster than normal. Use
Loctite (thread sealant) on threads or
lockwashers if necessary.
MECHANICAL SEAL REPLACEMENT
Refer to Figures 1, 2, and 3.
IMPORTANT: Replace seal seat, (Ref.
No. 22) and seal head (Ref. No. 23) at
the same time to ensure proper mating
of mechanical seal components!
1. Unthread fasteners (Ref. No. 16), nuts
(Ref. No. 25) and remove casing (Ref.
No. 15) and casing seal (Ref. No. 7)
from adapter (Ref. No. 3). Unthread
fasteners (Ref. Nos. 11 and 19) and
remove volute (Ref. No. 20) and
volute seal (Ref. No. 6) from adapter.
2. Unthread impeller fastener (Ref. No.
10) and remove impeller (Ref. No. 9),
impeller seal (Ref. No. 4) and shims
(Ref. No. 21).
Performance Chart
Model 10' 20' 30' 40' 50' 60' 70' 80' 90' Head*
020598 8460 7680 6840 6000 5100 4140 3180 2100 840 94 ft.
020599 8460 7920 7440 6960 6360 5760 5040 4200 3360 125
(*) Shut-off; to convert to psi, divide by 2.31
GPH of Water at Total Head in Feet Max.
5
Operating Instructions and Parts Manual
020598 and 020599
Self-Priming Engine-Driven
Centrifugal Pumps
Maintenance (continued)
NOTE: To keep shaft from turning, hold
impeller while unthreading impeller
fastener.
3. Pry seal seat from impeller recess
with a screwdriver (See Figure 1).
Figure 1 – Mechanical Seal
Replacement
4. Remove adapter by unthreading
adapter fasteners (Ref. No. 5) and
fastener seals (Ref. No. 4). Press old
seal head and adapter seal (Ref. No.
24) out of adapter by pushing from
engine side.
5. Clean adapter and impeller seal
recesses before installing new
pieces.
6. Carefully wipe polished surface of
new seal seat with a clean cloth.
7. Wet rubber portion of seal seat
with a light coating of soapy water.
8. Press seal seat squarely into recess in
impeller. If seal seat does not press
squarely into recess, it can be
adjusted by pushing on it with a
piece of pipe. Always use a piece of
cardboard between pipe and seal
seat to avoid scratching lapped,
highly polished surface of seal seat
(handle it carefully).
9. After seal seat is in place, ensure
that it is clean and has not been
marred.
10. Using a clean cloth, wipe shaft and
make certain that it is completely
clean.
11. Place adapter seal (o-ring) onto seal
head behind flange and press
assembly into adapter as shown in
Figure 2.
Do not touch or wipe
polished face of seal
head.
Figure 2 – Mechanical Seal
Replacement
12. Secure adapter on engine mounting
face, using fasteners and fastener
seals. Be sure to replace gasket (Ref.
No. 31) between engine and
adapter, if removed during disassembly.
Tighten adapter fasteners evenly to
avoid cocking or damaging adapter.
13. Replace impeller and shims, ensuring that key (Ref. No. 8) is in place
and lock impeller to shaft with fastener and impeller seal on fastener.
14. Replace volute seal and volute with
fasteners, ensure that check valve
(Ref. No. 12) is in place then
remount casing seal and pump casing with fasteners and nuts.
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Operating Instructions and Parts Manual
Models 020598 and 020599
Maintenance (continued)
IMPORTANT: Always inspect all seals
when unit is disassembled. Replace
when rubber is hard, cracked, or worn.
When reassembling parts with o-ring
seals or gaskets, it is sometimes helpful
to apply a small amount of soapy water
on o-ring so that parts slide over o-ring
without pinching or shaving it.
SHIM ADJUSTMENT
When installing a replacement impeller
or mechanical seal, it may be necessary
to vary the number of shims (Ref. No.
21) that will be required. This is easily
done by adding one 0.010" shim more
than was removed, and reassembling
pump as described.
Ensure that casing is snugly in place
and check shaft to make sure it is turning freely. If it turns freely, check to
ensure that adapter (Ref. No. 3) and
casing (Ref. No. 15) are fitted tight
together. If they are not, tighten fasteners (Ref. No. 16) and recheck shaft
for free turning. Tighten carefully, turning shaft while tightening. If shaft
seizes before fasteners (Ref. No. 16) are
completely tight, disasseble pump and
remove one shim and repeat reassembly.
If any time during above operation
shaft does not turn free, follow procedure indicated above and repeat procedure.
Above procedure ensures that pump
will have proper running clearance (less
than 0.010") between impeller and casing and perform like a new unit with
new impeller or motor.
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Operating Instructions and Parts Manual
020598 and 020599
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Little or no discharge
and unit will not prime
Loss of suction after
satisfactory operation
1. Casing not filled with
water
2. Total head too high.
3. Suction head exceeds that
for which pump is
designed
4. Impeller partially or completely plugged
5. Hole or air leak in suction
line
6. Foot-valve too small
7. Impeller damaged
8. Foot-valve or suction line
not submerged deep
enough in water, pulling
air
9. Insufficient inlet pressure
or suction head
10. Suction piping too small
11. Casing gasket leaking
12. Suction or discharge line
valves closed
1. Air leak in suction line
2. When unit was last
turned off, water
syphoned out of pump
casing
3. Suction head exceeds that
for which pump was
designed
1. Fill pump casing. Using a footvalve will extend pump life and
facilitate immediate priming.
2. Shorten suction lift and/or discharge head
3. Shorten suction line and/or vertical distance from liquid to
pump, install foot-valve and
prime
4. Disassemble pump and clean out
impeller
5. Repair or replace suction line
6. Match foot-valve to piping or
install one size larger footvalve
7. Disassemble pump and replace
impeller
8. Submerge lower in water
9. Increase outlet pressure by
adding more water to tank or
increasing back pressure by
turning gate-valve on discharge line to partially closed
position
10. Increase pipe size to pump
inlet size or larger
11. Replace
12. Open
1. Repair or replace suction line
2. Refill (reprime) pump casing
before restarting
3. Shorten suction line and/or vertical distance from liquid to
pump, install foot-valve and
prime
8
Operating Instructions and Parts Manual
020598 and 020599
Troubleshooting Chart (continued)
Symptom Possible Cause(s) Corrective Action
Loss of suction after
satisfactory operation
(continued)
4. Insufficient inlet pressure
or suction head
5. Clogged foot-valve,
strainer or pump
4. Increase inlet pressure by adding
more water to tank or increasing
back pressure by turning gate
valve on discharge line to partially closed position
5. Unclog, clean or replace as necessary
Pump overloads driver
(gas engine shuts off
before complete hose
fill)
Pump vibrates and/or
makes excessive noise
Pump runs but no fluid
1. Total head lower than
pump rating. Unit delivering too much water
2. Specific gravity and viscosity of liquid being
pumped different than
the pump rating
3. Speed too high
1. Mounting plate or foundation not rigid
enough
2. Foreign matter in pump
causing unbalance
3. Impeller bent
4. Cavitation present
1. Faulty suction piping (air
leak)
2. Pump located too far
from fluid source
3. Gate valve closed
4. Clogged strainer
5. Fouled foot-valve
6. Discharge height too
great
1. Increase back pressure on pump
by turning gate valve on discharge line to partially closed
position that will not overload
motor
2. Pump is designed for water, use
only for liquids which have similar characteristics.
3. Check and correct, lower speed
1. Reinforce
2. Disassemble pump and remove
3. Replace impeller
4. Check suction line for proper size
and check valve in suction line if
completely open, remove any
sharp bends before pump and
shorten suction line
1. Replace
2. Relocate
3. Open
4. Clean or replace
5. Clean or replace
6. Lower the height
9
Operating Instructions and Parts Manual
020598 and 020599
Troubleshooting Chart (continued)
Symptom Possible Cause(s) Corrective Action
Pump Leaks at shaft
Worn mechanical seal
Replace
Engine will not start or
run (or when you pull
rope to start, it will
not move)
1. Stone or foreign object
lodged in impeller
2. No oil in crank case
1. Disassemble pump and remove
stone or foreign object
2. Fill oil to overflowing, or check
dipstick. See engine manual
10
Operating Instructions and Parts Manual
020598 and 020599
For Repair Parts, contact dealer where pump was purchased.
Please provide following information:
-Model number
-Serial number (if any)
-Part description and number as shown in parts list
1
3
2
6
4
5
7
8
29
27
31
25
24
23
22
21
9
10
4
11
12
30
20
Figure 3 — Repair Parts Illustration
Repair Parts List
Ref. 31⁄2HP B&S 51⁄2HP B&S
No. Description 020598 020599 Qty.
2 Slinger washer -EPDM 020631 020631 1
3 Adapter 020632 020632 1
5 Adapter fastener 020633 020633 4
8 Key 020634 020634 1
9 Impeller 020635 020636 1
10 Impeller fastener 020637 020637 1
11 Volute fastener 020638 020638 1
13 Fill plug 020639 020639 1
15 Casing 020640 020640 1
17 Drain plug 020641 020641 1
19 Volute fastener 020642 020642 2
20 Volute 020643 020643 1
21 Impeller shim set 020644 020644 1
(.005", .015", .030"; one each)
31 Gasket 020645 020645 1
33 † Seal kit -EPDM (standard) 020646 020646
(*) Standard hardware item, available locally.
(†) Includes all required seals, Ref. Nos. 2, 4, 6, 7, 12, 14, 18, 22, 23, 24, 31.
19
26
27
28
18
33
13
14
15
16
17
32
11
Operating Instructions and Parts Manual
Notes
020598 and 020599
12
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