Pentair MYERS C40-20 Manual

NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
MODEL C40-20
INDUSTRIAL PUMP
INSTALLATION AND SERVICE MANUAL
Part # 23833A632 | © 2012 Pentair Pump Group, Ltd. | 11/12/12

23833A632 11/12/12 2
FLUID END
DIMENSIONS
BODY
High strength
ductile iron.
SUCTION,
DISCHARGE
OPENINGS
Threaded for easy
connections.
CYLINDERS
Tapered stainless steel liners
with ceramic oxide coating.
PISTON ASSEMBLY
Solid stainless steel stud,
pressure ring, spring, retainer
and cap screw.
BODY
Rugged cast gray iron
crankcase serves as oil
reservoir. Removable cover
section for easy service.
CRANKSHAFT
Rotates in either direction.
Automotive-type heat-
treated alloy steel.
MAIN BEARINGS
Tapered roller
bearings.
CONTINUOUS SPLASH
LUBRICATION
In either rotation direction.
CONNECTING LINKS
Cast ductile iron with
replaceable bronze
bearings.
CROSSHEADS
Heavy-duty ductile iron.
Extension rods are axially
threaded and pinned,
polished stainless steel.
PACKING
Nitrile with cotton fabric.
Multi-lip V-ring supported
by brass follower.
VALVE ASSEMBLIES
All stainless steel.
Spring-loaded valves,
hardened seats.
VALVE & CYLINDER
CAPS
Buna-N O-rings and
backup ring.
221/16"
69/32"125/16"
1111/16"
31/64 "
Oil Fill
1" NPT
Discharge
5/16" x 5/32"
Key way
103/4"
5"
Oil Drain 27/8"
101/4"
121/2"
35/16"15/8"
2" NPT
Suction
1.3750 dia.
1.3745
57/16"
3/4"57/16"
121/8"
31/8"
10"
167/8"
(4) Slots 9/16 wide x
15/16 long for 1/2bolts

23833A632 11/12/12
3
INSTRUCTIONS
CAUTION: Positive displacement pumps must
have a proper size and operable type of pressure
regulating valve or pressure relief valve piped into
the discharge line. This is mandatory to prevent
damage to pump and piping or possible injury to
personnel. Do not install any valves or shut-off
devices in the bypass line from pressure regulator
to tank or supply.
CAUTION: All pumps should be installed level.
For mobile applications the maximum angle of
intermittent operation should be no more than
5 degrees in any one direction.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related
accessories contain chemicals known to the
State of California to cause cancer, birth
defects or other reproductive harm.
It is recommended to install a pulsation dampener in
discharge line to smooth out pressure pulse. This can
protect pump parts and piping for longer life and
quiet operation.
BELT DRIVE
With belt drives, pulley on both engine and pump
should be located as close possible to bearing to
reduce bearing and shaft bending loads. Make sure
that all bolts, nuts, set screws, and keys are properly
tightened.
STARTING PUMP
A. Before Starting
1. Read all instructions carefully.
2. Fill pump crankcase with recommended oil
(SAE 30) to level mark on oil saber.
3. Replace all drain plugs in pump and piping.
4. Inspect tank to be sure that no foreign material is
in tank or suction line.
5. Fill tank at least half full or connect suction to
water supply. Open valve (if present) in suction line.
Avoid prolonged dry operation which may cause
excessive wear on piston packing. Be sure that an
operating pressure gauge is located in discharge
line. Use heavy duty, liquid filled, pulsation free
pressure gauge.
6. Make sure all valves, including spray gun or
nozzles, are open in discharge line. Spray gun may
be anchored to discharge back into tank.
7. Completely back off pressure adjusting device on
pressure regulating valve.
8. Check pressure rating for pulsation dampener
pressure regulator and pipe fitting to make sure
working pressure is not over maximum pressure
rating.
B. Starting the Unit
1. After starting, close discharge valve or spray gun
slowly while watching pressure gauge to make
sure relief valve or unloader is operating properly.
2. Adjust relief valve or unloader to desired pressure.
See regulator instructions.
3. Cycle nozzles or gun on and off to be sure that
pressure adjustment and regulator operation is
satisfactory.
NOTE: Nozzle capacity should not exceed 90% of
pump capacity for satisfactory regulator operation.
AVOID FREEZING by draining all water from pump
and system in cold weather. There is a 3/8 NPT drain
plug for each cylinder chamber.
SUGGESTED MAINTENANCE SCHEDULE
Operation Interval
Check oil level Daily
Drain & change oil (SAE 30) 300 hr. (1)
Inspect piston packing and spacer rings 500 hr. (2)
Inspect valves and springs 500 hr. (3)
Inspect connecting link bearing inserts 1000 hr. (4)
Inspect crankshaft tapered roller bearings 2000 hr.
Inspect piston stud 2000 hr. (5)
1. Drain at operating temperature to prevent
contamination from setting.
2. Inspect frequently for leakage; piston packing
is allowed to drip in order to cool and lubricate
packing. Replace if there is a stream leak.
3. Replace if cracks and heavy wear are present.
4. Replace at first signs of fatigue or wear to prevent
damage to crankshaft.
5. Replace if any pitting or rough surface is on the
seal surface.
CORRECT
INCORRECT
CORRECT INCORRECT
PULLEY LOCATION ON PUMP AND MOTOR SHAFT

23833A632 11/12/12 4
LUBRICATION
Pump – Fill crankcase with SAE 30 crankcase oil
(2 quarts). Maintain oil level between the high and the
low level marks on bayonet oil gauge inserted through
crankcase cover. Add extra quart for crankshaft
speeds under 300 RPM.
NOTE: Drain oil from crankcase after first 30 hours of
operation. Refill with proper oil as mentioned above.
Change oil every 300 hours thereafter. Check oil levels
regularly. Change oil immediately if water droplets are
found on bayonet gauge.
SERVICE
CAUTION: Disconnect electrical leads to motor
or remove spark plug leads on engine before
proceeding.
REPLACING PISTON PACKING
Loosen cap screw (59) and piston assembly can be
removed through cylinder opening. Use waterproof
grease to lubricate piston packing and O-ring on
cylinder caps.
REPLACING CYLINDER LINERS
Removal: (See Figure 1)
1. First remove piston packing as outlined previously.
2. Rotate crankshaft until piston rod is in rear
position.
3. Insert puller (3) through inside of cylinder.
4. Insert disc (4) into slots on puller (3).
5. Slip plate (2) over threads on puller (3) as shown.
6. Screw nut (1) on thread in puller (3) and snug up.
7. Tighten nut (1) until liner breaks loose.
8. Loosen nut (1) and slip disc (4) out of slots.
9. Remove puller (3) and repeat to remove remainder
of cylinder liners.
CYLINDER LINER REMOVAL TOOL KIT
(17123B001K)
INSTALLATION
Reasonable care and judgment should be used when
installing the new tapered cylinder liner. Clean out any
accumulation of loose rust or corrosion in tapered
cylinder. Inspect O-ring. Replace it if damaged. Insert
liner in position by hand and drive into position firmly
(but not excessively) with a wood block and mallet.
Never use a hand or hydraulic arbor press to install
cylinder liner. It is possible to shrink the liner.
REPLACING PISTON ROD SEALS
The rod seal assembly (see Figure 2) contains two oil
seals with lips facing power end. The oil seal can be
replaced without taking the fluid end off by removing
the cylinder and piston to allow access for oil seal
housing. Unscrew two Allen screws and place into the
other two tapped holes. Gradually screw them in to
push oil seal housing off the retainer. After assembling
new seals in oil seal housing an assembly thimble
should be used on end of crosshead rod for sliding oil
seal housing back into retainer. Check gasket, replace
if damaged.
An assembly thimble should be used on small end
of the piston rod to expand sealing edge as it is
pushed on. Figure 3 shows a recommended thimble
for installation of oil seals. The thimble should be
machined from high carbon steel and polished on the
exterior to reduce possibility of seal lip damage.
2
34
1
17124A000
17123B000
M1666A000
05027A011
PISTON
ROD
CYLINDER
BODY
CYLINDER LINER
Figure 1
Power
End
Side
Fluid
End
Side
Figure 2
1
1
/ 4 "
1
/ 16 "R
9
/ 16 "
DIA.
5
/ 8 "
1
/ 32 "R
.880 DIA.
.875
.485 DIA.
.480
Figure 3

23833A632 11/12/12
5
DC
SERVICING CRANKCASE PARTS
To remove the crankshaft you do not need to remove
the cylinder body from the crankcase. Remove the
connecting link caps from the connecting links and
push the free links toward the cylinder end as far as
possible. The crankshaft can then be removed by
taking off the bearing caps and pulling the crankshaft
through the bearing opening as shown in illustration
Figure 4. During this process be sure to note the
markings on the connecting links and link caps
because these parts are mated to each other and
should be reinstalled in the same position they were
before taken apart.
REPLACING CRANKSHAFT AND
SHIMMING BEARINGS
1. Slide crankshaft into the crankcase and carefully
rest bearings on the sides of the crankcase. Place
.045" shim (3 pink shims) on the drive side bearing
cap. Place 4.38" O.D. O-ring onto the bearing cap.
2. Slide the bearing cap with oil seal over the drive
shaft, being careful not to cut the seal lip on the
keyway. Tighten the six cap screws, alternating
between the screws, and torque to 20 ft-lb
(240 in-lb).
3. Install the non-drive side cap without shims or
O-ring. Secure with two cap screws positioned
180º apart. Torque the two cap screws to 60
in-lb. (Do not use torque wrench with large ft-lb
scale - - may not be accurate.) As these screws
are alternately tightened, the crankshaft should be
rotated by hand to seat the tapered roller bearings.
4. With a feeler gauge or tapered gauge measure the
shim gap adjacent to each of the screws.
5. The required shim thickness for cap is equal to the
average of the two gap measurements, plus .005"
constant.
6. Remove the two bolts and cap. Place the correct
shim thickness on this cap; round up to an
additional .003" shim if the desired shim thickness
does not match .003" increment of a green shim.
7. Place the 4.38" O.D. O-ring on the cap and re-
install. Tighten the six screws to 20 ft-lb (240 in-lb)
as the crankshaft is rotated by hand to seat the
bearings and ensure no significant binding as a
result of the shimming.
SERVICING CONNECTING LINKS
When the connecting link bearings are worn but the
crankshaft is in good condition, standard replacement
bearing inserts can be installed in the connecting
links. These bearings should not be tampered with or
changed in size in any way at the time of assembly.
Do not attempt to change the size of the link by filing
or grinding the faces of the link cap where they are
clamped together. When reinstalling the links on the
crankshaft be sure to place the oil holes upward for
proper lubrication. (See Figure 5)
Bushing Ream Diameter “C” 1.000" to 1.0005"
Inside Diameter “D” of
Standard Bushing 2.3745" to 2.3760"
Bushing Inside Diameter “D”
of Undersize Bushing 2.3445" to 2.3460"
When installing new bushings for the crosshead wrist
pin, these bushings should be reamed to proper size
“C” after pressing into the link.
NOTE: “D” bushings are NOT to be reamed after
assembly.
RECOMMENDED TORQUE
Fastener Location Torque (Foot-Pounds)
Link Bearing Caps 25
Crankshaft End Caps 20
Cap Screw Holding Piston Packing Assembly
to Piston Rod 25
Valve and Cylinder Cover Plate 200
Cap Screw (Fluid End to Crankcase) 1/2"-50, 5/8"-80
CROSSHEAD AND PISTON RODS
Repair parts for the crosshead and piston rod are
supplied only as a complete unit. If either of these
parts becomes worn it is necessary to replace
both the crosshead and piston rod. Under normal
conditions a crosshead will not wear nor will the bore
of the crankcase wear to the extent that replacement
will be required. If extreme wear does occur, it will
be due to severe damage from the lack of oil or a
fairly large metal object scoring the crosshead bore.
A clearance of .002" to .004" is standard for the
crosshead. The parts can wear until considerably
more clearance than this exists before harmful
operation will occur.
Figure 4 Figure 5

23833A632 11/12/12 6
Figure 6
Crank Pin Diameter “D”
RECONDITIONING CRANKSHAFTS
When only a very small amount of damage has
occurred on the crank pins, such as small surface
grooves cut part way around the bearing surface, the
crank pins can sometimes be reconditioned for further
use. This can be done with emery cloth and polishing
until all ridges are completely removed. The final
polishing operation should be performed by using a
very fine emery cloth. This procedure can be followed
only where the amount of sanding does not reduce
the normal diameter of the crank pin.
If the crankshaft cannot be refinished by hand in this
manner, it will be necessary to regrind and polish the
bearing surfaces for special undersize bearings.
Figure 6 shows the crankshaft with the crank
pin sizes tabulated in Table 1 for both standard
diameter and the undersize diameter that should
be maintained. Worn or corroded crank pins can be
ground and polished down to .030" under the size
when the cranks were new. When this is done the
surface should be polished to a good smooth finish.
The undersize bearing halves are made especially
for turned down crankshafts. If the crankshaft has
been reground to dimension “D” for reconditioned
shafts, the undersize bearing halves can be used and
will fit properly and operate as well as the original
equipment.
If the surface is badly damaged, the crankshaft can
often be salvaged by “metalizing” the crank pins and
then regrinding and polishing to the original diameter.
When assembling oil seals on the crankshaft an oil
seal expander thimble should be used at the end of
the shaft as shown in Figure 6. A thimble of this type
will cause the lip of the oil seal to gradually expand
up to the shaft diameter allowing it to slip on the shaft
without turning or damaging the seal in any way.
Extreme care should be taken when pushing oil seals
over keyways or holes in a shaft to make sure the
sealing lip is not damaged. A slight nick or cut in this
lip can damage a seal enough that it will not retain the
oil properly.
Table 1
Crank Pin Size “D” Standard –
Use Standard Link Bearing 2.3730" to 2.3740"
Size “D” for Reconditioned Shaft –
Use Undersize Link Bearing 2.3430" to 2.3440"
When reassembling all parts make sure that all
gaskets are replaced exactly as they were originally.
SYMPTOMS POSSIBLE CAUSE OF PROBLEM
Failure of pump to build pressure with
discharge closed.
See A, B, C, D, E, F, or L
Failure to hold pressure with
discharge open.
See C, D, E, F, or G
Pump is noisy.
See C, D, E, F, H, J, K, L, O, P, or Q
Pump gets hot.
See I, J, K
Pressure gauge shows abnormal
fluctuations.
See C, D, E, F, G, H, L, M, O, or R
Regulator chatter.
See D, G, H, L, or O
A. Pump not primed.
B. Valve closed in suction line.
C. Suction line or sediment
chamber clogged.
D. Air leak in suction line.
E. Pump packing or valves
badly worn.
F. Pump cylinder body cracked.
G. Holes in nozzle discs are too
large (nozzle worn out).
H. Need vacuum chamber in
suction line.
I. Water in crankcase.
J. Worn connecting link
bearings.
K. Lack of oil in crankcase or
speed reducer case.
L. Foaming mixture.
M. Regulator plunger sticking.
N. Worn orifice in nozzle.
O. Foreign matter under pump
valve.
P. Loose piston rod.
Q. Main bearing lock rings out.
R. Drive belt issues.
TROUBLESHOOTING

23833A632 11/12/12
7
EXPLANATION OF THE SERVICE CHART
A. Pump priming is usually not necessary when the
pump is installed correctly. However, there are
certain unusual conditions which may make it
necessary to prime the pump to get the pumping
action started. Priming will be required under
conditions where it is impossible for the piston to
displace the air in the pump and replace it with
water. This could be caused by a high suction
lift (high from the water supply to the pump), the
valves being stuck on the seat, such as after
pumping a sticky fluid, or it might be caused by
valves sticking due to extreme corrosion of the
valves and seats. A pump will not prime readily
if someone has tampered with the valve springs
causing them to exert undue pressure of the valve
plates against the valve seats. When the pump
appears to need priming this condition can be
checked by pouring water into the cylinder body
through one of the valve cap openings or into
the pump discharge opening at the same time
operating the pump to work the water into the
cylinder and valve passages.
B. Frequently a gate valve is installed in the suction
line between a tank or pressure line and pump
sediment chamber. This valve is usually installed in
the line to shut off the supply source for cleaning
sediment chamber or for pump repairs. If this valve
is closed or even partially closed it will interfere
with the flow of water to the pump suction to
such an extent that the pump will not perform to
full capacity. If the valve is partially closed it may
cause severe knocking and vibration of the pump
because the water cannot flow into the cylinder
cavities fast enough.
C. A sediment chamber should be installed in the
suction line between the gate valve and the
pump suction.
The strainers in these sediment chambers are of
more than adequate capacity to allow a free flow
of the liquid to the pump. However, because of its
normal function of collecting sediment, the strainer
may become severely clogged and in some cases,
it will completely stop the flow of liquid to the
pump. The length of time the pump may operate
before it is necessary to clean the strainer will
depend upon the type to liquid pumped. After the
pump has been used a short period the operator
will soon become familiar with the amount of
running time between strainer cleanings.
D. Any piston pump, when operated at high pressure,
will not operate satisfactorily or quietly if a mixture
of air and water is allowed to enter the pump
suction. For this reason, a small air leak in the
suction line will cause the pump to knock and
vibrate excessively. This holds true only for a small
air leak which allows the pump to draw a certain
amount of water mixed with air on each stroke of
the piston. A large air leak will cause the pump to
lose prime after which it cannot be reprimed until
the air leak is stopped. Air leaks may occur at the
joints of the suction line piping, at the gate valve in
the suction line, at the gasket sealing the cap on
the sediment chamber or by a crack in the suction
wall of the cylinder body, such as might be caused
by freezing if the pump is not properly drained
in freezing weather. There is also a remote
possibility of air drawing past the piston packing
on the suction stroke if the piston packings are
badly worn.
E. Badly worn packing or valves and valve seats will
cause a serious drop in pump capacity. This will
be indicated by a drop in pressure when guns are
turned on. Worn packing is very easy to detect
because of the water leakage. The packing should
be replaced just as soon as this excessive leakage
is noticed. If it is allowed to continue some of the
material may work past the piston rod seals into
the pump crankcase. Water in the pump crankcase
will cause severe corrosion of the bearings causing
them to fail. Worn valves can be detected only by
visual examination of each valve assembly. The
most prevalent cause of valve wear is the use of
highly abrasive liquids. This will cause the valve
and valve seat to wire cut. The cut starts as a very
small groove but increases very rapidly once the
valve starts to leak through this groove. Cutting will
usually be much more evident on the valve plate
in flat valve pumps. If the valve plates are replaced
as soon as they start to show this cutting action it
will prevent the valve seat from becoming cut in a
similar manner and keep the cost of replacement
parts to a minimum.
F. Pump cylinder bodies must withstand an extreme
amount of shock and pulsation while the pump is
in operation. If the pump is allowed to freeze, due
to not being drained, the freezing may crack the
cylinder body walls in almost any location. If the
crack should occur on the suction valve or cylinder
portion of the body it may allow a small amount of
air to enter on the suction stroke and cause noisy
operation or a decrease in pumping capacity. If the
crack develops in the walls between the cylinder
cavities or discharge valve cavity it may allow the
water to flow from one cavity to the adjacent cavity
and rob the pump of its effective displacement.
This will not cause noisy operation but will reduce
the pump capacity and may show up as a drop in
pressure when the discharge is open.
G. The holes in gun or nozzle discs are continually
subject to wear because of the high velocity of the
liquid through the holes. Naturally they wear much
faster if there is any abrasive or solid material in
the liquid. If the holes become worn too much
they may allow a higher rate of discharge than the
pump is able to provide and a drop in pressure
will be noticed. This can quickly be checked by
reducing the number of nozzles or guns and at
the same time watching the amount of overflow
from the pressure regulator. If there is considerable
overflow, even though a drop in pressure has been
noticed, it is an indication that the regulator valve
is worn rather than the gun or nozzle discs.

23833A632 11/12/12 8
H. Suction surge arresters should be installed on
the suction line of reciprocating pumps. A rubber
bag type of suction surge arrester is preferred
but a suitable vacuum chamber can be made by
attaching a piece of vertical pipe as close to the
pump suction as possible. One and one-half or
two inch pipe can be used. A standing height of
12" to 15" will be sufficient with the top end closed
by an ordinary pipe cap.
I. Water may accumulate in the pump crankcase
from two sources, the most prevalent being
leakage of the packing as explained in paragraph
E. The other means of accumulation is a
condensation of moisture inside the crankcase
due to changes in weather of the repeated heating
and cooling of the pump due to its normal usage.
Pumps that are used rather consistently and used
for a considerable period of time to heat the oil and
other working parts will not normally accumulate
water by condensation. If the packing is replaced
as soon as it starts to leak it will be impossible for
water to enter the crankcase from this cause. In
localities or conditions where extremely abrasive
liquids must be used, it is always advisable to
replace the cylinder shells at the same time the
worn packing is replaced. New packing will not
give satisfactory service if it is placed in a badly
worn and roughened cylinder liner.
J. Worn connecting link bearings will develop
only because of unusual or adverse operating
conditions. They will, however, be seriously
affected by corrosion if water is present in the
crankcase and they will wear out from overheating
if adequate oil is not provided in the crankcase.
For this reason we recommend thorough draining,
cleaning and refilling with new oil prior to any
storage period. Replace bearings as soon as any
damage is discovered to avoid possible damage to
crankshaft. (See Lubrication Instructions.)
K. Lack of sufficient oil in crankcase can quickly
cause failure of pump power end and result in
extensive repairs. Oil level should be checked
periodically during normal operation as well
as when maintenance work of any nature is
performed. Insufficient oil will first be indicated
by excessive heat and should be corrected
immediately.
L. A foaming mixture will sometimes have the same
effect as a small air leak in the suction line. This is
because various quantities of the foam are drawn
through the suction line into the pump disrupting
the normal flow of water.
M.Pressure regulators that are operated by piston
action may become sluggish in action due to the
piston sticking or fitting too tightly in its cylinder.
This condition may be caused by an accumulation
of chemicals collecting in and around the piston,
or may be due to excessive corrosion of the
piston parts. To check this condition, remove and
clean the piston. After cleaning the piston, parts
should be covered with a waterproof grease before
assembling.
N. In some cases there is a tendency for the pressure
regulator valves to chatter or vibrate excessively.
This is an indication of unstable operation due to
nozzling in the high or low capacity range of the
regulator. On systems using pressure regulator
valves, the nozzling requirements should be at
least 50% and not exceed 90% of pump capacity.
Due to nozzle disc wear, the system requirements
may exceed the 90% limit, resulting in cycling or
hammering of the regulator. This can readily be
checked by replacing the worn discs with new
discs.
O. If a large piece of foreign matter becomes
lodged between a pump valve and valve seat or
if something of this kind becomes wedged in so
that it prevents the valve from operating normally
we can expect drastic drop in capacity and
considerable surge or pulsation will be noticed
in the discharge line. To correct a condition of
this kind it is usually necessary to examine each
valve in the pump until the offending condition is
located. The use of clean liquid and seeing that the
suction strainer is in proper condition will prevent
trouble of this kind.
P. Noisy pump operation will sometimes be caused
by a piston rod being loose in the crosshead. This
will become evident only after the rod becomes
so extremely loose that some end motion can be
found between the piston rod and crosshead. A
noise of this kind usually has a regular cadence
timed with each stroke of the piston. When this
condition occurs it is always necessary to replace
both the piston rod and the crosshead because
the two parts are threaded and pinned into a single
unit.
Q. The crankshaft main bearings are held in place by
the end bearing caps. If bearing cap retaining bolts
should become loosened, the bearing can shift
which may cause bearing to run exceptionally hot.
UNUSUAL CONDITIONS THAT MAY
CAUSE TROUBLE
R. If the V-belts have a tendency to wear rapidly, it
may be due to having the belt tightener pulley
adjusted too far into the belt, throwing a reverse
bend in the belt where it passes over the pulley.
If very much reverse angle seems necessary to
keep the belt tight, other provisions should be
made for tightening, such as placing shims under
the pump base or otherwise spreading the drive
centers enough to take up the belt length. On
multiple V-belt drives, a complete set of belts
should be installed when making a replacement.
Further, all the belts in one set should be checked
for length and accurately matched to avoid placing
an undue load on any one belt. The synchronized
belt can deliver higher torque with narrower belt.
The sprocket is thus narrower which results in
less bending movement on main bearing and
crankshaft.

23833A632 11/12/12
9
MODEL C40-20 PARTS LIST
* Undersized (.030 dia.) Bearings are 10877A010K (2 Halves).
Reference Part Number Description Qty.
1 14946A003 WASHER, SEAL 12
2 19101A013 SCREW, CAP, 3/8-16 12
3 05876A240 O-RING, 4-3/8 O.D. 2
4 05818A077 KEY, SQUARE, 5/16 x 5/16 1
5 06074D016 CRANKSHAFT 1
6 05710A004 SEAL, OIL, 1-3/8 SHAFT 1
7 10414B002 CAP, BEARING, OPEN 1
8A 05011A027 GASKET, SHIM, .003", GREEN 6
8B 05011A028 GASKET, SHIM, .005", PINK 4
9 05675A018 BEARING, CUP 2
10 05674A019 BEARING, CONE 2
11 10414B001 CAP, BEARING, CLOSED 1
12 06116A000 PIN, WRIST 3
13 17515B001 CROSSHEAD & PISTON ROD 3
14 27300B000 LINK 3
14A 06108B000K BUSHING 3
15* 06109A000 BEARING, STEEL-BACKED HALF 6
16 17481A001 PLUG, PIPE, MAGNETIC 1
17 17360A014 GAUGE, OIL LEVEL 1
18 110-000110-201 O-RING 1
19 17995A001 NIPPLE, PIPE 1
20 05737A021 CAP, PIPE 1
21 06077C000 LID 1
22 19101A007 SCREW, CAP, HEX, 3/8-16 6
23 06089B000 GASKET 1
24 06076D000 CASE, GEAR 1
25 06008A374 PLATE, NAME 1
26 05160A004 SCREW, DRIVE 4
27 19108A027 BOLT, SQUARE, 5/8-11 4
28 22835A004 U-CUP 6
29 24958A001 RETAINER, OIL SEAL HOUSING 3
30 05876A224 O-RING, 2-1/2 O.D. 3
31 05059A052 GASKET, VELLUMOID, 2-15/16 O.D. 3
32 05059A435 GASKET, VELLUMOID, 1.80 O.D. 3
33 06120A000 SPRING, RETAINER 3
Reference Part Number Description Qty.
34 24959A002 HOUSING, OIL SEAL 3
35 06106A034 SCREW, CAP, SOCKET HEAD 6
36 05454A011 WASHER, LOCK, 1/4" 4
37 19109A041 NUT, HEX, 5/8-11 4
38 19103A008 SCREW, CAP, HEX, 1/2-13 4
39 05030A020 WASHER, 5/16 I.D. 2
40 05028A002 SCREW, MACHINE, 1/4-20 2
41 06123A000 LID, BODY, CYLINDER 1
42 18790E006 BODY, CYLINDER 1
43 06124A00 LINER, CYLINDER, 2.00 I.D. 3
45 06125A004 SEAT, VALVE 6
46 17714A003 VALVE, DELRIN®6
47 06127A003 SPRING, VALVE, DISCHARGE 3
48 05876A171 O-RING, 1 7/16 O.D. 6
49 18753A008 RING, BACK-UP, NITRILE 6
50 18456A007 CAP, VALVE 6
51 05059A436 GASKET, NYLON 6
52 05659A130 STUD, 7/8-14UNF 6
53 05059A437 GASKET, NYLON 3
54 18457A008 CAP, SST CYLINDER 3
55 19109A072 NUT, HEX ST 7/8-14 NF 6
56 18753A009 RING, BACK-UP, NITRILE 3
57 05876A173 O-RING, 2 7/16 O.D. 3
58 26980B000 PLATE, STEEL 1
59 17050A004 SCREW, CAP, HEX, NYLOCK 3
60 06136A000 PLUG, PIPE, BRASS 3/8" NPT 4
61 18879A004 RETAINER, SPRING, SST 3
62 06127A002 SPRING, VALVE, SUCTION 3
63 18920A000 SPRING, SST 3
64 18921A000 RING, PRESSURE, SST 3
65 18922A000 PACKING, V-RING, 2.00 O.D. 3
66 18923A002 FOLLOWER, BRASS 3
67 20850A004 STUD, PISTON 3
68 05030A128 WASHER, COPPER 3
11 10
97
6
5
4
3
2
1
8B
8A

23833A632 11/12/12 10
39
38
47
46
45
43
42
41
40
37
36
35
34
33
32
31
30
29
28
27
26
48
49
50
51
52
53
54
56
55
57
58
59
60
61
62
63
64 65
66
67
68
12
13
14A
14
15
16
17
18
19
20
21
22
23
24
25
2" NPT
MODEL C40-20

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1101 MYERS PARKWAY
ASHLAND, OHIO, USA 44805
419-289-1144
WWW.FEMYERS.COM
Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
CENTRIFUGAL & RECIPROCATING PUMPS
Pentair Myers®warrants its products against defects in material and workmanship for a period of 12 months from
the date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided
that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals.
During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or
replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the
right to change or improve its products or any portions thereof without being obligated to provide such a change or
improvement for prior sold and/or shipped units.
Seals, piston cups, packing, plungers, liners and valves used for handling clear, fresh, nonaerated water at a
temperature not exceeding 120ºF are warranted for ninety days from date of shipment. All other applications are
subject to a thirty day warranty. Accessories such as motors, engines and auxiliary equipment are warranted by
the respective manufacturer and are excluded in this standard warranty. Under no circumstance will Pentair Myers
be responsible for the cost of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight
expenses to and from the factory or an authorized Pentair Myers service facility.
This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate
or maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident
or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that
are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is
moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and
manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized
Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.
Warranty Exclusions: PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND THE
DESCRIPTION ON THE FACE HEREOF. PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS
PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER
INSTALLATION. PENTAIR MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR
IMPROPER INSTALLATION. PENTAIR MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS.
Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or
consequential damages and therefore such limitations may not apply to you. No warranties or representations at any
time made by any representatives of Pentair Myers shall vary or expand the provision hereof.