Pentair MYERS D65-16, D65-16AVD-AF Series, D65-20 Series, D65-16AVD-AFL Series Series Manual

D65-16 AND D65-20 SERIES

RECIPROCATING PUMPS

NOTE! To the installer: Please make sure you provide this manual to the owner of the equip ment or to the responsible
party who maintains the system.

Part # 26850A002 | © 2014 Pentair Ltd. | 06/04/14

GENERAL INSTRUCTIONS

SUGGESTED MAINTENANCE SCHEDULE

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 shutoff devices in the by-pass 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.

BELT DRIVE

With belt drives, the pulley on both the engine and pump
should be located as close as possible to bearing to
reduce bearing and shaft bending loads. On multiple
V-belt drives, a complete set of belts should be installed
when making a replacement. Make sure that all bolts,
nuts, set screws and keys are properly tightened.

STARTING PUMP

Check oil level – Daily

Drain & change oil – 300 hr.
Drain at operating temperature to prevent contamination
from settling.

Replace piston packing – 500 hr.
Inspect frequently for leakage; piston packing is allowed
to drip in order to cool and lubricate packing.

Inspect valves and springs – 500 hr.
Replace if cracks and heavy wear are present.

Inspect connecting link bearing inserts – 1000 hr.
Replace at first signs of fatigue or wear to prevent
damage to crankshaft.

Inspect crankshaft tapered roller bearings – 2000 hr.

LUBRICATION

Fill gear case with Mobilgear 630 or equal additive to
approximately 5 1/2 qts. Adjust by viewing the oil level at
mark on oil dipstick.

NOTE: After first 30 hours of operation drain oil from
gear case (preferably drain at operating temperature),
replace plug and refill crankcase with new oil. Check oil
level daily and add oil as needed.

Fill pump crankcase with recommended oil to level
mark on oil saber. Oil recommendations are covered
in lubrication section of pump instructions. Replace all
drain plugs in pump and piping. Inspect tank to be sure
that no foreign material is in tank or suction line. 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 cylinders
piston packing. Be sure that an operating pressure
gauge is located in discharge line. Make sure all valves,
including spray gun or nozzles, are open in discharge
line. Spray gun may be anchored to discharge back into
tank. Completely back off pressure adjusting screw on
pressure regulating valve.

After starting, close discharge valve or spray gun slowly
while watching pressure gauge to make sure relief
valve or unloader is operating properly. Adjust relief
valve or unloader to desired pressure. See regulator
instructions. Cycle nozzles, or gun, on and off to be
sure that pressure adjustment and regulator operation
is satisfactory. 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.

ADDITIVES FOR CRANKCASE OIL

Use of Molybdenum Disulfide (MoS2) is highly
recommended as an additive to the gear case oil in
back geared pumps and speed reducers. The additive is
compatible with all known oils. It is effective in reducing
wear and friction that power train life may be doubled
between overhauls.

• Volume MoS2 concentrate or dispersion “M”
for 5% – 9 oz.

• Volume MoS2 concentrate or dispersion “M”
for 10% – 18 oz.

SERVICE

Disengage clutch, disconnect electrical leads to motor,
or remove spark plug leads on engine.

REPLACING PACKING

Move assembly to front end of cylinder (top dead
center). Remove valve assembly if required to provide
clearance. Remove cap screw. Retract piston rod and
insert tool. Pull packing assembly out or push by rotating
crankshaft by hand.

26850A002 06/04/14

2

PLATE

SCREW

NUT

PULLER

DISC

Inspect cylinders for linear grooving. If any is detected,
replace cylinders. New packing will rapidly cut or wear

out in grooved cylinders.

Assemble V-rings onto stud and lubricate the outside of
the assembly with Molykote

®

or other grease for ease in

insertion – do not use a graphite-type grease.

When installing each V-ring assembly, rotate crankshaft
until piston rod is at forward position. Place copper
gasket in position in stud using a small amount of
Permatex® to hold in place.

Assemble capscrew, etc., into piston assembly and push
into cylinder. Torque the cap screw to 50 ft/ lbs.

REPLACING CYLINDERS

Remove packing and rotate crankshaft until piston rod
is in rear position. Insert puller through inside of cylinder
and pilot over piston rod. Insert disc into slots on puller
and slip plate over threads on puller. Screw nut on thread
of puller and snug up. Tighten nut until cylinder breaks
loose. Loosen nut and slip disc out of slots. Remove
puller and repeat to remove other cylinders.

Reasonable care and judgment should be used when
installing the new cylinder. Clean out any accumulation
of loose rust or corrosion in cylinder body. Install a new
O-ring in groove on tapered portion of cylinder and
lubricate with oil or grease. Position cylinder carefully
by hand to avoid cutting the O-ring. Drive into position
firmly, but never use a hydraulic press as excessive force
can cause damage and make cylinders very difficult to
remove for later replacement.

REPLACING VALVE SEATS - D65-16 SERIES

First remove spring retaining bar, spring and flat valve.
When removing upper valve seat, pass head of puller
through hole in valve seat before sliding wedge is
inserted alongside puller bolt. Draw down on nut at top
of bolt. When removing lower seats, drop puller bolt
through opening for upper seat and remove in same
manner. Using sliding wedge on pumps where lower

seats are the same size as upper seats.

Place new lower seat in tapered hole in cylinder body.
Hold a soft brass or hardwood round bar against seat
and drive into place. The knocker stem is in two pieces
so that it can be shortened for installing discharge seats
after suction seats have been installed.

3

26850A002 06/04/14

REMOVING AND REPLACING SEATS:
CENTER POST VALVES - D65-20 SERIES

REMOVING CRANKSHAFT AND
PINION SHAFT

Remove valve and cylinder caps which provide
access to both suction and discharge valves. Remove
the stainless steel shoulder screw which serves as a
valve guide and spring retainer. Remove shoulder screw,
spring retainer, spring and valve from the pump fluid end.

Assemble stud, retainer and three large screws by
inserting screw heads thru holes in valve seat. Rotate
retainer to the right until heads catch and secure in
place by screwing stud firmly. Place plate over stud,
screw on nut and torque slowly with wrench until seat
breaks loose.

Suction valve seats are removed as above, except two
stud lengths are joined using coupling.

TO REPLACE

Inspect tapered valve seat bore in fluid end for rust and
wipe out excess with a rag. Place a new lower seat
in tapered hole. Drive lower seat firmly into place and
repeat for upper seat being sure to also inspect the
tapered bore for rust.

Reassemble valve, spring and spring retainer. Confirm
that springs are in correct location. Be sure that shoulder
screw is bottomed in valve seat. This screw is furnished
with a Nylock locking pellet to prevent accidental
loosening of screw. Also be certain that valve disc is
installed on the valve with the flat face down. Inspect
O-rings on valve and cylinder caps. Replace if O-rings
show signs of wear.

NOTE FOR ALL D65 SERIES: Reassemble valve spring
in correct location. When upper and lower valve seats
are the same size, the heavier spring (larger diameter
wire) is always installed on upper or discharge valve.

REPLACING PISTON ROD SEALS

The rod seal assembly contains two seals and 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 the end of the crosshead rod for sliding the oil seal
housing back into retainer. Check gasket and replace if
damaged.

An assembly thimble should be used on the small end of
the piston rod to expand sealing edge as it is pushed on.
The thimble should be machined from high carbon steel
and polished on the exterior to reduce possibility of seal
lip damage.

Remove packing assemblies and remove connecting link
caps. Move the link-crosshead assembly as far forward
as possible. On some models, it may be necessary to
remove the fluid cylinder body to obtain clearance for
crankshaft removal.

Secure separation of the crankshaft gear and gear case
so that crankshaft will be held in place against pinion
shaft. Remove both crankshaft bearing caps. Hold
crankshaft at ring gear and left-hand link journal to
prevent dropping into bearing bores. Remove from gear
case by moving crankshaft to the right until left end can
be swung free.

To remove pinion shaft, observe inside of gear case
to see if small sheet metal plates are in front of each
bearing. These plates must be removed prior to
bearing caps.

Tap the end of the pinion shaft extension to remove the
bearing cup at the opposite end. After removing pinion
shaft, the remaining bearing cup can be removed by
gently tapping against the peripheral edge of the cup

with a brass rod.

REPLACING PINION SHAFT AND
SHIMMING BEARINGS

After installing the link-crosshead assemblies and
moving them toward the fluid end as far as possible,
tap the right-hand pinion shaft bearing cup into position
using the bearing cap. Make sure that the spacer is
properly seated on drive end of pinion shaft. The curve
side should match the fillet radius of pinion shaft. Place
pinion shaft in position and tap left-hand bearing cup
into place.

Cover the shaft keyway to protect lip of oil seal. Slide on
the open bearing cap with a .030" shim. Tighten the four
cap screws to recommended torque.

Install other cap using total shim thickness. Tighten cap
screws holding pinion or crankshaft caps to gear case.
Rotate pinion shaft back and forth, applying about 15
lbs. axial force to properly seat tapered rollers. Measure
end-play by using an indicating gauge.

Subtract recommended end-play (.005"– .009") from
actual end-play. This is the amount of shim that must
be removed. After excess shim thickness has been
removed, replace caps and retighten cap screws.
Measure end-play, and if end-play is not within limits
recommended, add or subtract shims as required.

Pinion bearing shims are made of .002" layers bonded
together. Start separation of layers by heating edge, then
peel back.

26850A002 06/04/14

4

REPLACING PINION SHAFT AND SHIMMING
BEARINGS ON HYDRAULIC DRIVEN PUMPS

Press bearing cones onto both ends of the pinion shaft,
being sure bearing seats completely against stop on
shaft. Place pinion and bearing cone assembly into
the crankcase, positioning the pinion gear over the
crankshaft gear. Carefully press bearing cups into both
sides of the crankcase. Tap cups until bearing cups
and cones are completely together and pinion is in the
proper location in the crankcase. Press shaft seal into
cap, bearing and seal plate. Be sure both caps are
installed with the lip towards the center of the pump.
Install right bearing cap with two .003" thick shims and
tighten. Install left bearing cap with one .015" thick shim,
and one .003" thick shim and tighten. Rotate pinion
shaft back and forth, applying about 15 lbs. axial force
to properly seat the tapered rollers. Measure end-play
by using an indicating gauge. Subtract recommended
end-play (.005"–.009") from actual end-play. This is the
amount of shim that must be removed. After excess
shim thickness has been removed, replace left cap
and retighten cap screws. Measure end-play again and

repeat if necessary.

REPLACING CRANKSHAFT AND
SHIMMING BEARINGS

Press the bearing cups into the caps. Place one cap
into position on the right side with cap screws engaged
about one turn. Install crankshaft (left end first), and push
both bearing caps into place. Extreme care should be
exercised to avoid damage to gear teeth, bearings, and
link journals.

For quiet operation and long life, the crankshaft and
bearings must be installed with .003" to .005" preload.
To adjust, loosen the four cap screws on the pinion shaft
bearing cap.

RECONDITIONED CRANKSHAFTS

When the crank throws are slightly damaged, they can
sometimes be reconditioned for further use. This can
be done by sandpapering and polishing until all ridges
are completely removed. The final polishing operation
should be with very fine emery cloth. If the surface is
badly damaged, the crankshaft can often be salvaged by
“metalizing” the crank throw, regrinding and polishing to

the original diameter.

SERVICING CONNECTING LINKS

The connecting rod link is furnished with replaceable
split sleeve bearing inserts at the crank throw. Do not
attempt to re-fit connecting links to the crankshaft
bearings by filing or grinding the matting faces of the link
cap where it contacts the link. Always be sure that the
proper side of the link is placed upward when attaching
it to the crankshaft. The upper side contains an oil hole
at the crosshead end of the link. This oil hole must be up
to allow proper oil feeding to the crosshead pin bushing.
The wrist pin is press-fitted into the crosshead and
slip-fitted through the bronze bushing. Use arbor press
to force in the wrist pin, checking to see if the link is
free to rotate after the wrist pin is pressed in. Verify that
both sides of the wrist pin do not protrude beyond the
crosshead.

The crosshead end of the connecting link is fitted with
a bronze bushing. New replacement link bushings are
reamed to the proper size for immediate installation.
If only the bushing is replaced, it may be necessary to
ream the new bushing to the proper inside diameter after
it is pressed into the link. When placing the bushing on
the link, be sure that the oil holes in the bushing and link

are in line after the bushing is pressed into position.

CROSSHEAD AND PISTON RODS

Place about a .045" shim on the right crankshaft bearing
cap, and tighten the five cap screws. Install the left cap
without shims and secure with two cap screws. Torque
at 13 ft/lbs and rotate the crankshaft. Retorque the cap
screws. Repeat three times to properly seat the tapered
roller bearings. Measure (adjacent to the cap screws) the
shim gap remaining between the bearing cap and the
gear case. The required shim thickness for this cap is
equal to the average gap measurement plus .022". Insert
correct shim thickness under left bearing cap and tighten
cap screws. Install connecting links and caps, then
torque cap screws to 40 ft/ lbs.

IMPORTANT – Check for adequate side clearance of
links on crankshaft. Some shims must be moved from
one end to the other until sideways movement of all links
can be seen.

Check torque of cap screws on all bearing caps.

Repair parts for the crosshead and piston rod are
supplied 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 oversize crossheads
will be required. A clearance of .002" to .004" is standard
for the crosshead.

RECOMMENDED TORQUE (foot-pounds)

FASTENER LOCATION

Link Bearing Caps - 40

Crankshaft End Caps - 20

Pinion Bearing End Caps - 20

Cap Screw, Piston
Assembly to Piston Rod - 50

Valve Cap Clamps - 100

Cylinder Cap Clamps - 175

5

26850A002 06/04/14

D65-16 SERIES

26850A002 06/04/14

6

D65-16 SERIES PARTS LIST

Item Description Qty. Eng. No

1 CASE, GEAR 1 04625E001

2 GASKET, LID 1 06201C000
3 SCREW, CAP, 5/16"-18 UNC x 7/8", STEEL 8 19100A005
4 LID 1 04561B000
5 NIPPLE, SPECIAL VENT 1 17995A000

CAP, PIPE 1 05737A002
6 GAUGE, OIL, WITH O-RING 1 17360A010
7 O-RING 3/8" I.D., 9/16" O.D., 1/16" THICK 1 110-000110-201

8* SHAFT, PINION 1 27938B020

SPACER 1 20164B002A

SHIM 4 05231A074

SHIM 4 05231A075
9 CONE, BEARING 2 05674A013

CUP, BEARING 2 05675A009

10 CAP, OPEN 1 04563A001

CAP, CLOSED 1 04741B001

OIL SEAL 1 05710A017

SCREW, CAP, 3/8"-16 UNC x 1", STEEL 18 19101A013

WASHER, SEAL 18 14946A003

11* CRANKSHAFT 1 27937C022

12 CONE, BEARING 2 05674A018

CUP, BEARING 2 05675A013

CAP, BEARING 2 04624B004

SHIM, PLASTIC, GREEN,

6-7/32" x 5-1/32" x .0115"
SHIM, PLASTIC, PINK, 6-7/32" x 5-1/32" x .003" 6 05068A018
O-RING, 5" I.D., 5-1/8" O.D., 1/16" THICK 2 05876A098

13 CROSSHEAD 3 06211B041
14 LINK, DUCTILE IRON 3 17042C002
15 BUSHING 3 B01619A000
16 SCREW, CAP 6 19103A016

LOCK WASHER 6 05454A004

17 BEARING, TWO HALVES 3 15245A101
18 WRIST PIN 3 M01525A001
19 HOUSING, OIL SEAL 3 24959A001

OIL SEAL 6 22835A004

20 RETAINER, OIL SEAL HOUSING 3 24958A000

SCREW, ALLEN 6 06106A034
GASKET, SEAL HOUSING 3 05059A434
KIT FOR REF. NO. 19 & 20 1 24648A000

21 SPRING 3 M1643A000
22 GASKET 3 05059A058
23 PLUG, PIPE, MAGNETIC 1 17481A002
24 SCREW, CAP, 3/4"-10 UNC x 3", STEEL 4 06106A038

NUT, HEX 3/4"-10 UNC, STEEL 4 19109A050
LOCKWASHER 4 05454A003

25 SCREW, CAP, 5/8"-11 UNC x 2", STEEL 4 19105A008
26 SCREW, CAP, .551"-14 METRIC x 2-3/4" 3 16654A006

SCREW, CAP, .551"-14 METRIC x 3", 316 SST

27 FOLLOWER 3 20855A000
28 LINER, CYLINDER, 316 SST 3 20851A002

* NOTE: When purchasing the crankshaft or pinion on units built prior to 07/12,
both items will need to be replaced due to an improvement in design.

STYLE VALVE ASSEMBLY Y Z Z

SUCTION VALVE ASSEMBLY 11903A004K 18925A003 18925A013K

DISCHARGE VALVE ASSEMBLY 11903A003K 18925A004K 18925A014K

SEAT MATERIAL 420F 420F 316

A VALVE SEAT 6 06271A000 18835A002 18835A004

B VALVE 6 17553A002 18834A001 18834A001

C SPRING, VALVE, SUCTION 3 18463A000 18463A000 18463A000

D RETAINER, SPRING, VALVE 6 11827A000 18833A001 18833A001

E CLAMP, RETAINER, SPRING 6 11828A000 – –

F LOCK NUT OR CAP SCREW 6 11904A001 18832A000 18832A001

FOR AVAB-CP PUMP

O-RING, CYLINDER (INCL. W/LINER) 3 05876A095
WASHER, SPLASH 3 05059A418

Description Qty. Eng. No

SPRING, VALVE, DISCHARGE 3 11829A000 11829A000 11829A000

6 05068A016

3 16654A008

Item Description Qty. Eng. No

28 PLUG, PIPE, 1-1/4" 1 05022A047

PLUG, PIPE, 3" 2 03210A000
LINER, CYLINDER 316 SST FOR AVAB-CP PUMP 3 20851A002
O-RING, CYLINDER (INCL. W/LINER) 3 05876A095
WASHER, SPLASH 3 05059A418
PLUG, PIPE, 1-1/4" ALUM. BRONZE 1 05022A065
PLUG, PIPE, 3" ALUM. BRONZE FOR AVAB

29 PACKING V-RINGS 3 18922A004
30 STUD, 2-9/16" x 2-1/16" x 1-1/2", 316 SST 3 20850A000

31 RETAINER 3 20852A000

32 WASHER 3 05030A128
33 SPRING 3 20853A000
34 RING 3 20854A000

35 BODY, CYLINDER 1 18639F002

36 NUT, HEX, 5/8"-11 UNC, STEEL 6 19109A046
37 NUT, HEX, 7/8"-14 UNF, STEEL 6 19109A072
38 STUD, 5/8"-11 UNC x 3-5/16" 6 05659A560
39 STUD, 7/8"-14 UNF X 4-1/2" 6 05659A089
40 CLAMP, VALVE CAP 3 20848A000
41 CLAMP, CYLINDER CAP 3 20856A000
42 CAP, VALVE 3 17390A000

43 0-RING, 2-3/8" x 2-9/16" x 3/32" 3 05876A064
44 CAP, CYLINDER 3 20849A000

45 O-RING, 3-1/4" x 3-1/2" x 1/8" 3 05876A096

46

47

48 LID, CYLINDER 1 M01520A000
49 SCREW, MACHINE 1/4"-20 UNC x 1/2" 2 148850001

50 PLUG, PIPE, 1/2" 3 05022A015

51 PLUG, PIPE, 1" 3 05022A043

7

& AVAB-CP PUMP

STUD, 2-9/16" x 2-1/16" x 1-1/2", 316 SST

FOR AVAB-CP PUMP

RETAINER 3 20852A001

RING 316 SST FOR AVAB-CP PUMP 3 20854A001

BODY, CYLINDER, ALUM. BRONZE FOR AVAB &

AVAB-CP PUMP

O-RING, 2-3/4" x 2-15/16" x 3/32" 3 05876A095

CAP, VALVE, ALUM. BRONZE FOR AVAB

& AVAB-CP PUMP

CAP, CYLINDER, ALUM. BRONZE FOR AVAB

& AVAB-CP PUMP

ASSEMBLY, VALVE, SUCTION: D65-16AVD,

D65-16AVD-L & D65-16AVAB “Y”
ASSEMBLY, VALVE, SUCTION: D65-16AVD-CP “Z” 3 18925A003
ASSEMBLY, VALVE, SUCTION:

D65-16AVAB-CP “Z” 316
ASSEMBLY, VALVE, DISCHARGE: D65-16AVD, D65-

16AVD-L & D65-16AVAB “Y”
ASSEMBLY, VALVE, DISCHARGE: D65-16AVD-CP “Z” 3 18925A004
ASSEMBLY, VALVE, DISCHARGE:

D65-16AVAB-CP “Z” 316

WASHER 2 05030A020

PLUG, PIPE, 1/2" FOR AVAB PUMP 3 05022A035
PLUG, PIPE, 1/2" 316 SST FOR AVAB

& AVAB-CP PUMP

PLUG, PIPE, 1" FOR AVAB PUMP 3 06206A000
PLUG, PIPE, 1" ALUM. BRONZE FOR AVAB

& AVAB-CP PUMP

26850A002 06/04/14

2 03210A010

3 20850A010

1 18639F004

3 17390A002

3 20849A001

3 11903A004

3 18925A013

3 11903A003

3 18925A014

3 05022A063

3 05022A064

D65-16AVD-AF/AFL SERIES

26850A002 06/04/14

8

PARTS LIST

D65-16AVD-AF (20160F027) Right Hand Drive
D65-16AVD-AFL (20160F028) Left Hand Drive

Item Description Qty. Eng. No

1 CASE, GEAR 1 04625E100

2 GASKET, LID 1 06201C000
3 SCREW, CAP, 5/16"-18 UNC x 7/8", STEEL 8 19100A005
4 LID 1 04561B000
5 NIPPLE, SPECIAL VENT 1 17995A000

CAP, PIPE 1 05737A002
6 GAUGE, OIL, WITH O-RING 1 17360A010K
7 O-RING 5/6" I.D., 7/16" O.D., 1/16" THICK 1 05876A063

8* SHAFT, PINION 1 27938B020

SPACER 1 20164B022A

KEY 3/8" x 3/8" x 2-1/2" 1 05818A048

SHIM 4 05231A074

SHIM 4 05231A075
9 CONE, BEARING 2 05674A013

CUP, BEARING 2 05675A009

10 CAP, OPEN 1 04563A001

CAP, CLOSED 1 04741B001

OIL SEAL 1 05710A017

SCREW, CAP, 3/8"-16 UNC x 1", STEEL 18 19101A013

WASHER, SEAL 18 14946A003

11* CRANKSHAFT/RING GEAR 1 27937C022

12 CONE, BEARING 2 05674A018

CUP, BEARING 2 05675A013

CAP, BEARING 2 04624B004

SHIM, PLASTIC, GREEN, 6-7/32" x 5-1/32" x .015" 6 05068A018

SHIM, PLASTIC, PINK, 6-7/32" x 5-1/32" x .003" 6 05068A016

O-RING, 5" I.D., 5-1/8" O.D., 1/16" THICK 2 05876A098

13 CROSSHEAD 3 06211B041
14 LINK, DUCTILE IRON 3 17042C002
15 BUSHING 3 B0619A001
16 SCREW, CAP 6 19103A016

WASHER, LOCK 6 05454A004

17 BEARING, TWO HALVES 3 15245A101K
18 WRIST PIN 3 M01525A001
19 HOUSING, OIL SEAL 3 24959A001

OIL SEAL 6 22835A004

20 RETAINER, OIL SEAL HOUSING 3 24958A000

SCREW, ALLEN 6 06106A034

GASKET, SEAL HOUSING 3 05059A434

KIT FOR REF. NO. 19 & 20 1 24648A000

* NOTE: When purchasing the crankshaft or pinion on units built prior to 07/12,
both items will need to be replaced due to an improvement in design.

Item Description Qty. Eng. No

21 SPRING 3 M01643A000
22 GASKET 3 05059A058
23 PLUG, PIPE, MAGNETIC 1 17481A002
24 SCREW, CAP, 3/4"-10 UNC x 3" STEEL 4 06106A038

WASHER, LOCK 4 05454A003
25 SCREW, CAP, 5/8"-11 UNC x 2", STEEL 4 19105A008
26 SCREW, CAP, .551"-14 METRIC x 2-3/4" 3 16654A006
27 FOLLOWER 3 20855A000
28 LINER, CYLINDER .316 SST 3 20851A002

PLUG, PIPE 1-1/4" 1 05022A047

PLUG, PIPE, 3" 2 03210A000
29

PACKING V-RINGS, AFLAS
30 STUD, 2-9/16" x 2-1/16" x 1-1/2",

31 RETAINER 3 20852A000
32 WASHER 3 05030A128
33 SPRING 3 20853A000
34 RING 3 20854A000
35 BODY, CYLINDER 1 18639F002

36 NUT, HEX, 5/8"-11 UNC, STEEL 6 19109A046
37 NUT, HEX, 7/8"-14 UNF, STEEL 6 19109A072
38 STUD, 5/8"-11 UNC x 3-5/16" 6 05659A560
39 STUD, 7/8"-14 UNF x 4-1/2" 6 05659A089
40 CLAMP, VALVE CAP 3 20848A000
41 CLAMP, CYLINDER CAP 3 20856A000
42 CAP, VALVE 3 17390A000
43 O-RING, 2-3/8" x 2-9/16" x 3/32", VITON 3 05876A238
44 CAP, CYLINDER 3 20849A000
45 O-RING, 3-1/4" x 3-1/2" x 1/8", VITON 3 05876A196
46 ASSEMBLY, VALVE, SUCTION: D65-16AVD-AF

47 ASSEMBLY, VALVE, DISCHARGE: D65-16AVD-AF

48 LID, CYLINDER 1 M01520A000
49 SCREW, MACHINE 1/4"-20 UNC x 1/2" 2 05028A002

50 PLUG, PIPE, 1/2" 3 05022A015
51 PLUG, PIPE, 1" 3 05022A043

STAINLESS STEEL

O-RING, 2-3/4" x 2-15/16" x 3/32", VITON 3 05876A095

D65-16AVD-AFL

D65-16AVD-AFL

CLAMP 2 26842A000

®

3 18922A013
3 20850A000

3 11903A004K

3 11903A003K

STYLE VALVE ASSEMBLY Y

SUCTION VALVE ASSEMBLY 11903A004K

DISCHARGE VALVE ASSEMBLY 11903A003K

SEAT MATERIAL 420F

Description Qty. Eng. No

A SEAT, VALVE 6 06271A000

B VALVE 6 17553A002

C SPRING, VALVE, SUCTION 3 18463A000

SPRING, VALVE, DISCHARGE 3 11829A000

D RETAINER, SPRING, VALVE 6 11827A000

E CLAMP, RETAINER, SPRING 6 11828A000

F LOCK NUT OR CAP SCREW 6 11904A001

9

26850A002 06/04/14

D65-20 SERIES

48

28

Cap Screw 18832A000

Retainer 18833A001 (3 req)

Discharge Spring 11829A000
(3 req)

Suction Spring
11463A000

Valve 18834A001
(3 req)

Valve Seat
18835A002 (3 req)

COMPLETE DISCHARGE VALVE AND SEAT 18925A004
COMPLETE SUCTION VALVE AND SEAT 18925A003

26850A002 06/04/14

10

D65-20 SERIES PARTS LIST

Item Eng. No Description Qty.

1 04625E001K CASE, GEAR 1
2 06201C000 GASKET, LID 1
3 19100A005 SCREW, CAP, 5/16"-18 UNC x 7/8", STEEL 8
4 04561B000 LID 1
5 17995A000 NIPPLE, SPECIAL VENT 1

05737A002 CAP, PIPE 1
6 7206-0094-00K DIPSTICK KIT WITH O-RING 1
7 110-000110-201 DIPSTICK 1
8 20164B020K SHAFT, PINION (INCLUDES SPACER) 1

20164B022A SPACER 1

05231A074 SHIM, GREEN, .003" THICK 4

05231A075 SHIM, PINK, .015" THICK 4
9 05674A013 CONE, BEARING 2

05675A009 CUP, BEARING 2

10 04563A001 CAP, OPEN 1

04741B000 CAP, CLOSED 1

05710A017 OIL SEAL 1

19101A013 SCREW, CAP, 3/8"-16 UNC x 1", STEEL 18

14946A003 WASHER, SEAL 18

11 20355C022K CRANKSHAFT 1
12 05674A021 CONE, BEARING 2

05675A013 CUP, BEARING 2

04624B004 CAP, BEARING 2

05068A016

05068A018

05876A098 O-RING, 5" I.D., 5-1/8" O.D., 1/16" THICK 2

13 06211B041 CROSSHEAD AND PISTON ROD 3
14 17042C002 LINK, DUCTILE IRON 3
15 B01619A000 BUSHING 3
16 06171A010K SCREW, CAP 6

05454A004 LOCK WASHER 6

17 15245A101 BEARING, TWO HALVES 3
18 M01525A001 WRIST PIN 3
19 24959A001 HOUSING, OIL SEAL 3

22835A004 OIL SEAL 6

20 24958A000 RETAINER, OIL SEAL HOUSING 3

06106A034 SCREW, ALLEN 6

05059A434 GASKET, SEAL HOUSING 3

24648A000 KIT FOR REF. NO. 19 & 20 1

21 M01643A000 SPRING 3
22 05059A058 GASKET 3
23 17481A002 PLUG, PIPE, MAGNETIC 1
24 06106A038 SCREW, CAP, 3/4"-10 UNC x 2-1/2", STEEL 4

05454A003 LOCK WASHER 4

18639F002 FLUID END, COMPLETE (DUCTILE IRON) 1

20160F233

SHIM, PLASTIC, PINK,
6-7/32" x 5-1/32" x .015"

SHIM, PLASTIC, GREEN,
6-7/32" x 5-1/32" x .003"

FLUID END, COMPLETE
(ALUMINUM BRONZE)

Item Eng. No Description Qty.

25 19105A008 SCREW, CAP, 5/8"-11 UNC x 2", STEEL 4
26 16654A006 SCREW, CAP, .551"-14 METRIC x 2-3/4" 3
27 18923A002 FOLLOWER 3
28 M01520A001 COVER-LOWER, BODY, CYLINDER 1
29 18922A000 PACKING, V-RINGS 3
30 18924A012 STUD, 2-9/16" x 2-1/16" x 1-1/2",

31 18879A002 RETAINER 3
32 05030A128 WASHER 3
33 18920A000 SPRING 3
34 18921A000 RING 3
35 18639F002 BODY, CYLINDER 1

18639F004 BODY, CYLINDER FOR AB PUMP 1
36 19109A046 NUT, HEX, 5/8"-11 UNC, STEEL 6
37 19109A072 NUT, HEX, 7/8"-14 UNF, STEEL 6
38 05659A560 STUD, 5/8"-11 UNC x 3-5/16" 6
39 05659A089 STUD, 7/8"-14 UNF X 4-1/2" 6
40 20848A000 CLAMP, VALVE CAP 3
41 20856A000 CLAMP, CYLINDER CAP 3
42 17390A000 CAP, VALVE 3

17390A002 CAP, VALVE FOR AB PUMP 3
43 05876A064 0-RING, 2-3/8" x 2-9/16" x 3/32" 3
44 20849A000 CAP, CYLINDER 3

6

6

1

45 05876A096 O-RING, 3-1/4" x 3-1/2" x 1/8" 3
46 18925A013K SUCTION VALVE AND SEAT COMPLETE 3
47 18925A014K DISCHARGE VALVE AND SEAT COMPLETE 3

48 20851A001 LINER, CYLINDER 3

49 148850001 SCREW, MACHINE, 1/4"-20 UNC x 1/2" 2

50 05022A063 PLUG, 1/2" PIPE 3
51 05022A064 PLUG, 1" PIPE 3

20849A001 CAP, CYLINDER FOR AVAB PUMP 3

18835A004 SEAT, VALVE 6

18834A001 VALVE 6

18463A000 SPRING, VALVE, SUCTION 3

11829A000 SPRING, VALVE, DISCHARGE 3

18833A001 RETAINER 6

18832A001 SCREW, CAP 5/16"-24 UNF, SHOULDERED 6

05876A095

05022A065 PLUG, 1-1/4" PIPE 1

03210A010 PLUG, 3" PIPE 2

05030A020 WASHER 2

SST, PISTON

O-RING, 2-3/4" x 2-15/16" x 3/32"
FOR LINER

3

3

11

26850A002 06/04/14

1

2

D65-20 HYDRAULIC DRIVE COMPONENTS

3

4

5

6

7

8

1/8"

9

Item Description Qty. Eng. No

1 CASE, GEAR 1 04625E100
2 SHAFT, PINION 1 20164B040
3 SHIM, GREEN, .003" THICK 4 05863A024
4 SHIM, PINK, .015" THICK 2 05863A023
5 CONE, BEARING 2 05674A020
6 CUP, BEARING 2 05675A019
7 CAP, BEARING & SEAL PLATE 2 04741B010
8 SEAL, OIL 2 05710A046
9 SCREW, CAP, SOCKET HEAD GRADE 8;

5/16"-24 UNF x 1" LONG
(TORQUE 15 ft/lbs)

DIMENSIONS, S.A.E., “C” FACE MOUNTING

16 06106A048

26850A002 06/04/14

12

14 Tooth 12/24
Pitch Involute Spline

1/2"-20 UNF-2B
(4) Holes

.540 Pilot Depth

THE PUMP MUST BE INSTALLED WITH A PRESSURE RELIEF VALVE IN DISCHARGE LINE

TROUBLESHOOTING

Pump fails to build pressure with discharge closed
Failure to hold pressure with discharge open
Pump is noisy
Pump gets hot
Pressure gauge shows abnormal fluctuation

POSSIBLE CAUSE OF PROBLEM

1. Pump not primed X

2. Valve closed in suction line X X

3. Suction line or sediment chamber clogged X X X

4. Air leak in suction line X X X

5. Pressure regulator valve badly worn or not properly adjusted X X

6. Broken valves or springs X X X

7. Pump packing or valves badly worn X X X

8. Pressure regulator bypassed by open #1 valve X X

9. Pump cylinder body cracked X X X

10. Water in crankcase X

11. Worn connecting link inserts or wrist pin bushings X X

12. Lack of oil in crankcase X X

13. Foaming mixture in tank X X X

14. Regulator plunger sticking X

15. Foreign matter under pump valve X X X

16. Loose piston rod X

17. Improper preload of crankshaft bearings X X

Explanation of the Service Chart

1. Pump priming is usually not necessary when the
pump is installed correctly. However, there are certain
conditions which may make it necessary to prime
the pump to get the pumping action started. Priming
will be required when 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, the valves
being stuck on the seat or by valves sticking due to
extreme corrosion. 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.

2. A gate valve is sometimes installed in the suction
line between a tank or pressure line and the pump
sediment chamber. It will shut off the supply source
in order to clean the sediment chamber or to perform
pump repairs. If this valve is partially or fully closed,
it will interfere with the flow of water to the pump
suction. This also may cause severe knocking and
vibration of the pump because the water cannot flow
into the cylinder cavities fast enough.

3. 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 to allow a
free flow of liquid to the pump. If the strainers become
severely clogged, they will completely stop the flow of
liquid to the pump.

4. Any piston pump operating at a high pressure will not
perform properly or quietly if a mixture of air and water
is allowed to enter the pump suction. A small air leak
in the suction line will cause the pump to knock and
vibrate excessively by allowing 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, by a crack in the suction wall of the cylinder
body, or by air drawing past the packing on the suction
stroke if the packing is badly worn.

13

26850A002 06/04/14

5. If the pressure regulator internal bypass valve is
worn, it will allow too much of the pump capacity to
be bypassed and recirculated back to the tank. By
examining the flow from this valve with the discharge
turned on, it can be determined whether or not the valve
is worn. If a heavy flow continues when the discharge is
turned on, it is usually a good indication of a worn valve
and should be replaced.

6. A broken pump valve or spring will often prevent one
cylinder from functioning properly resulting in a rough
pulsing discharge, a knocking sound and a loss of
capacity. If not repaired immediately, the rough running
pump can cause mechanical damage to itself or other
system components.

7. Worn packing, valves or valve seats will cause a severe
drop in pump capacity pressure. Worn packing is
detected by water leakage and should be replaced
immediately. Water getting in the pump crankcase
will cause severe corrosion of the bearings and cause
rapid wear. Worn valves can be detected by visual
examination of each valve assembly. Abrasive liquid will
cause wire cuts which begin as a very small groove, but
increases rapidly once the valve starts to leak through
this groove. If the valves 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.

8. If a portion of the pump delivery is allowed to bypass
because the #1 control valve is not completely
closed, there may not be adequate flow to develop
full pressure. This will cause rapid wear in the control
valve. Any excess flow should be bypassed only by the
pressure regulator.

9. Pump cylinder bodies withstand an extreme amount
of shock and pulsation while in operation. If the
pump is allowed to freeze, by not being drained, the
freezing may crack the cylinder body walls in almost
any location. If the crack occurs 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 cause
uneven displacement.

10. Water may accumulate in the pump crankcase from
two sources; leakage of packing or an accumulation
of condensation/moisture inside the crankcase due to
changes in weather or the repeated heating and cooling
of the pump. Pumps used consistently, running for a
considerable period of time to heat the oil and other
working parts, will not normally accumulate water by
condensation. Replace the packing as soon as it starts
to leak.

11. Worn connecting link bearings are caused by
unusual or adverse operating conditions and are
seriously affected by corrosion if water is present in
the crankcase. They will wear out from overheating if
the oil is not high quality or clean. Drain, clean and
refill with new oil at the specified interval and prior
to any storage period. Replace link inserts as soon
as any wear is noticed to avoid damage to
crankshaft journals.

12. Low oil in the crankcase can quickly cause failure of
the pumps power end and result in extensive repairs.
Oil level should be checked periodically during normal
operation and during all maintenance work.

13. 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.

14. Pressure regulators can become sluggish due to the
plunger sticking or fitting too tightly in the cylinder.
This may happen by an accumulation of chemicals
collecting in and around the plunger or from excessive
corrosion of the plunger parts. To check this condition,
remove and clean the plunger and cover the parts with
a waterproof grease before assembling. The pressure
regulator may chatter or vibrate excessively due to
an unstable operation from nozzling in the high or low
capacity range of the regulator. The range should be at
least 50% to 90% of pump capacity.

15. If foreign matter becomes lodged between the pump
valve and valve seat, a drastic drop in capacity and
considerable surge or pulsation will occur in the
discharge line. Examine each valve if this occurs.

16. Noisy pump operation may be caused by a loose piston
rod in the crosshead. This noise usually has a regular
cadence timed with each stroke. If this happens, always
replace both the rod and the crosshead.

17. Increased preload to the crankshaft bearings will reduce
bearing life, require more power and generate more
heat. Insufficient preload may cause a knock, timed with
the crankshaft rotation. Check for loose bolts on the
crankshaft end caps or adjust shims to obtain proper
bearing preload. Worn roller bearings will continue to
run but will introduce wear particles into the oil.

26850A002 06/04/14

14

D SERIES CROSSHEAD SEALS

24648A000 KIT

Field installation of these kits will require removal of
the fluid end to replace the existing retainer and seals.
On some fluid ends it may be necessary to hand grind
I.D. of fluid end to fit new kit. The same spring and
gasket is used to hold and seal the retainer.

The rod seal assembly contains two seals, and two oil
seals with lips facing the power end. The oil seal can
be replaced without taking the fluid end off by remov­ing the piston and the cylinder liner to allow access to
oil seal housing. Unscrew two Allen screws and place
into the other two tapped holes. Gradually screw
them in to push the oil seal housing off the retainer.
After assembling new seals in the oil seal housing, an
assembly thimble should be used on the end of the
crosshead rod for sliding oil seal housing back into the
retainer. Check gasket and replace if damaged. The
thimble should be machined from high carbon steel
and polished on the exterior to reduce the possibility
of seal lip damage. Place two Allen screws into clear­ance holes and tighten snug.

Hand Grind Here

OIL SEAL HOUSING ASSEMBLY

RECOMMENDED THIMBLE

"
"

"R

" DIA.

"

DIA.

ITEM DESCRIPTION QTY. ENG. NO

1 HOUSING, OIL SEAL 3 24959A001

"

DIA.

"

"R

"

2 OIL SEAL 6 22835A004

3 RETAINER, OIL SEAL HOUSING 3 24958A000

4 SCREW, ALLEN 6 06106A034

5 GASKET, SEAL HOUSING 3 05059A434

6 GASKET 3 05059A058

15

26850A002 06/04/14

STANDARD LIMITED WARRANTY

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.

replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the

or maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident

S OR IMPLIED WARRANTIES THAT EXTEND BEYOND THE

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

CENTRIFUGAL & RECIPROCATING PUMPS

Pentair Myers

During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or

®

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 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 EXPRES
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.

time made by any representatives of Pentair Myers shall vary or expand the provision hereof.

1101 MYERS PARKWAY
ASHLAND, OHIO, USA 44805
419-289-1144

WWW.FEMYERS.COM

Warranty Rev. 12/13