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 proper-
ty 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 fertil-
izers 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.
stand. This information is provided for
Specifications
SAFETY and to PREVENT EQUIPMENT
PROBLEMS. To help recognize this
information, observe the following
symbols:
Suction inlet . . . . . . . . . . . . . . . . . . 2" †
Discharge outlet . . . . . . . . . . . . . . . 2" †
(†) Standard NPT (female) pipe thread.
Dimensions (overall)
Danger indicates an
imminently haz-
ardous situation which, if not avoided,
WILL result in death or serious injury.
020598 . . . . . . . . 13" H x 15" W x 18" L
3
3
1
020599 . . . . . . . . . 18 ⁄8L x 17 ⁄8W x 15 ⁄
4H
Engine
020598 . . . . . . . . . . . . . . . . . 3.5 HP B&S
020599 . . . . . . . . 5.5 HP B&S OHV Intek
Warning indicates a
potentially haz-
ardous situation which, if not avoided,
COULD result in death or serious injury.
Oil type . . . . . . . . . SAE 30W Detergent
Weight
Caution indicates a
potentially haz-
ardous situation which, if not avoided,
MAY result in minor or moderate injury.
020598 . . . . . . . . . . . . . . . . . . . . 38 lbs.
020599 . . . . . . . . . . . . . . . . . . . . 43 lbs.
Material . . . . Glass-filled polypropylene
NOTE: Indicates important information
that, if not followed, may cause dam-
age to equipment.
Safety Guidelines
Failure to follow any
warnings/ cautions
Unpacking
After unpacking the unit, inspect care-
fully for any damage that may have
occurred during transit. Make sure to
tighten fittings, bolts, etc., before put-
ting unit into service.
can result in personal injury, pump dam-
age, and/or property damage.
This manual contains information that
is very important to know and under-
3824-254-00 FW0520 0703 Supercedes NEW
7/2003
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Operating Instructions and Parts Manual
Models 020598 and 020599
15. Prevent accidental starting by
General Safety (continued)
always removing spark plug or by
Spilled gasoline on a hot engine
disconnecting and grounding spark
may cause fire or an explosion. Fill
plug wire before working on engine
gasoline tank out-of-doors and
or the equipment driven by engine.
wipe up any spills.
16. Familiarize yourself with all con-
e. Provide a fire extinguisher nearby
trols. Learn how to stop an engine
when working with gasoline. Be
sure extinguisher is in operating
quickly in an emergency.
17. Keep the equipment and surround-
ing area clean. Remove all oil
deposits from equipment and sur-
rounding area. Accumulations of
grease and oil may present a fire
hazard and can cause engine dam-
age. Cleaning rags and other flam-
mable waste materials must be
stored in approved metal contain-
ers.
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 appli-
cation. Extinguishers rated ABC by
the National Fire Protection
Association are appropriate for
most applications.
IMPORTANT: Positively no smoking!
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.
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 out-
side and regularly check the exhaust
system for leaks. Be sure the area is
well ventilated.
19. When shutting off a gasoline
engine, be sure it is completely
stopped before leaving the work
area.
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.
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 suc-
tion line as short and direct as possi-
ble.
14. Do not operate this equipment
when mentally or physically
fatigued.
The unit should be
placed where the
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!
pump/engine is protected from the
weather and extremes of heat, cold and
humidity.
3
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020598 and 020599
Operating Instructions and Parts Manual
Self-Priming Engine-Driven
Centrifugal Pumps
should not be greater than 25% of
Installation (continued)
the suction inlet size for solid han-
2. Mount the unit on a solid founda-
dling pumps and 50% of the suction
inlet size for trash pumps.
tion. 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
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 over-
flows (starts spilling out of the
crankcase). Periodically check oil level
thereafter.
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.
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 dis-
charge, 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 occa-
sionally if an unusual siphoning has
occurred, if the fluid has been lost by
evaporation, and when the unit is
moved to a new location.
IMPORTANT: If plastic or fabric hose is
used for the suction piping, it should
be of a reinforced type so as not to col-
lapse under suction. The discharge pip-
ing should be at least the same size as
the discharge connection. Suction pip-
ing should be the same size as the dis-
charge piping or one size larger. Unless
long horizontal runs are involved, dis-
charge 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 pump-
ing. The foot-valve should be
installed when the suction lift is over
10 feet or when the suction line is
over 10 feet long.
Do not run pump
dry, as permanent
damage to the mechanical seal will
result.
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 maxi-
mum opening in the suction strainer
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
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Operating Instructions and Parts Manual
Models 020598 and 020599
flushed after each use.
Operation (continued)
2. Clean the suction line strainer at reg-
ular intervals.
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 man-
ual.
3. If the gas engine is equipped with a
spark arrestor screen in the muffler,
it should be inspected for wear peri-
odically, and replaced when neces-
sary.
NOTE: For information pertaining to
the engine and engine parts, consult
the Engine Manual or contact the near-
est authorized service representative or
the manufacturer.
6. Properly fueled and lubricated, the
pump/engine unit will run automati-
cally without attention to the con-
trols. The gasoline engine has a built-
in governor and will adjust the speed
of the engine automatically depend-
ing on the volume of water being
delivered.
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.
Even though this
unit will operate
MECHANICAL SEAL REPLACEMENT
Refer to Figures 1, 2, and 3.
with minimal supervision, it should not
be left operating by itself. Depending
on the application and area unit is oper-
ating (high traffic, people in area, etc.)
will dictate the necessity of having
someone watching over the unit.
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
Maintenance
To prevent acciden-
tal starting always
remove spark plug, or disconnect and
ground spark plug wire before attempt-
ing to service or remove any compo-
nent.
1. If the pump is located in an area sub-
ject to freezing temperature, the
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).
pump should be drained when not in
operation. Also, the pump should be
Performance Chart
GPH of Water at Total Head in Feet
20' 30' 40' 50' 60' 70'
Max.
90' Head*
Model
10'
80'
020598
020599
8460 7680 6840 6000 5100 4140 3180 2100 840 94 ft.
8460 7920 7440 6960 6360 5760 5040 4200 3360 125
(*) Shut-off; to convert to psi, divide by 2.31
5
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Operating Instructions and Parts Manual
020598 and 020599
Self-Priming Engine-Driven
Centrifugal Pumps
9. After seal seat is in place, ensure
that it is clean and has not been
marred.
Maintenance (continued)
NOTE: To keep shaft from turning, hold
impeller while unthreading impeller
fastener.
10. Using a clean cloth, wipe shaft and
make certain that it is completely
clean.
3. Pry seal seat from impeller recess
with a screwdriver (See Figure 1).
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 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.
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 disas-
sembly.
5. Clean adapter and impeller seal
recesses before installing new
pieces.
6. Carefully wipe polished surface of
new seal seat with a clean cloth.
Tighten adapter fas-
teners evenly to
avoid cocking or damaging adapter.
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).
13. Replace impeller and shims, ensur-
ing that key (Ref. No. 8) is in place
and lock impeller to shaft with fas-
tener 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 cas-
ing with fasteners and nuts.
6
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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 turn-
ing 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 fas-
teners (Ref. No. 16) and recheck shaft
for free turning. Tighten carefully, turn-
ing shaft while tightening. If shaft
seizes before fasteners (Ref. No. 16) are
completely tight, disasseble pump and
remove one shim and repeat reassem-
bly.
If any time during above operation
shaft does not turn free, follow proce-
dure indicated above and repeat proce-
dure.
Above procedure ensures that pump
will have proper running clearance (less
than 0.010") between impeller and cas-
ing and perform like a new unit with
new impeller or motor.
7
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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
1. Casing not filled with
water
1. Fill pump casing. Using a foot-
valve will extend pump life and
facilitate immediate priming.
2. Total head too high.
2. Shorten suction lift and/or dis-
charge head
3. Suction head exceeds that
for which pump is
designed
3. Shorten suction line and/or ver-
tical distance from liquid to
pump, install foot-valve and
prime
4. Impeller partially or com-
pletely plugged
4. Disassemble pump and clean out
impeller
5. Hole or air leak in suction
line
5. Repair or replace suction line
6. Foot-valve too small
6. Match foot-valve to piping or
install one size larger foot-
valve
7. Impeller damaged
7. Disassemble pump and replace
impeller
8. Foot-valve or suction line
not submerged deep
enough in water, pulling
air
8. Submerge lower in water
9. Insufficient inlet pressure
or suction head
9. Increase outlet pressure by
adding more water to tank or
increasing back pressure by
turning gate-valve on dis-
charge line to partially closed
position
10. Suction piping too small
11. Casing gasket leaking
10. Increase pipe size to pump
inlet size or larger
11. Replace
12. Open
12. Suction or discharge line
valves closed
1. Repair or replace suction line
Loss of suction after
satisfactory operation
1. Air leak in suction line
2. Refill (reprime) pump casing
before restarting
2. When unit was last
turned off, water
syphoned out of pump
casing
3. Suction head exceeds that
for which pump was
designed
3. Shorten suction line and/or ver-
tical distance from liquid to
pump, install foot-valve and
prime
8
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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
4. Increase inlet pressure by adding
more water to tank or increasing
back pressure by turning gate
valve on discharge line to partial-
ly closed position
5. Clogged foot-valve,
strainer or pump
5. Unclog, clean or replace as neces-
sary
1. Total head lower than
pump rating. Unit deliver-
ing too much water
1. Increase back pressure on pump
by turning gate valve on dis-
charge line to partially closed
position that will not overload
motor
Pump overloads driver
(gas engine shuts off
before complete hose
fill)
2. Specific gravity and vis-
cosity of liquid being
pumped different than
the pump rating
2. Pump is designed for water, use
only for liquids which have simi-
lar characteristics.
3. Check and correct, lower speed
1. Reinforce
3. Speed too high
Pump vibrates and/or
makes excessive noise
1. Mounting plate or foun-
dation not rigid
enough
2. Disassemble pump and remove
3. Replace impeller
2. Foreign matter in pump
causing unbalance
3. Impeller bent
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
4. Cavitation present
Pump runs but no fluid
1. Replace
1. Faulty suction piping (air
leak)
2. Relocate
2. Pump located too far
from fluid source
3. Open
3. Gate valve closed
4. Clogged strainer
5. Fouled foot-valve
4. Clean or replace
5. Clean or replace
6. Lower the height
6. Discharge height too
great
9
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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
1. Disassemble pump and remove
stone or foreign object
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. Fill oil to overflowing, or check
dipstick. See engine manual
2. No oil in crank case
10
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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
33
2
6
4
5
7
8
13
9
4
11
12
10
29
27
14
15
31
25
21
24
23
32
16
22
30
20
26
27
Figure 3 — Repair Parts Illustration
19
17
18
28
Repair Parts List
1
2
1
Ref.
3 ⁄ HP B&S
5 ⁄2HP B&S
020599
No.
Description
020598
Qty.
2
3
5
Slinger washer -EPDM
Adapter
Adapter fastener
020631
020632
020633
020631
020632
020633
1
1
4
8
9
10
Key
Impeller
Impeller fastener
020634
020635
020637
020634
020636
020637
1
1
1
11
13
15
Volute fastener
Fill plug
Casing
020638
020639
020640
020638
020639
020640
1
1
1
17
19
20
Drain plug
Volute fastener
Volute
020641
020642
020643
020641
020642
020643
1
2
1
21
Impeller shim set
020644
020644
1
(.005", .015", .030"; one each)
Gasket
31
020645
020646
020645
020646
1
33 † Seal kit -EPDM (standard)
(*) Standard hardware item, available locally.
(†) Includes all required seals, Ref. Nos. 2, 4, 6, 7, 12, 14, 18, 22, 23, 24, 31.
11
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Operating Instructions and Parts Manual
020598 and 020599
Notes
12
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