Graco 332246En B Users Manual 332246B Merkur High Pressure Displacement Pump, Repair Parts, English

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Repair-Parts

Merkur® High Pressure

Displacement Pump

High pressure carbon steel pump for protective coatings.

For professional use only.

See page 2 for model information, including maximum

working pressures.

Important Safety Instructions

Read all warnings and instructions in this

manual. For complete warnings and instruc-

tions see your sprayer manual. Hazard sym-

bols refer to specific procedure risks. Save all

instructions.

ti21064a

332246B

EN

Repair Kits

Accessory Kits

See page 10

Related Manuals

2332246B

Contents

Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Component Identification . . . . . . . . . . . . . . . . . . . . 3

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 14

Related Manuals

Models

Check your displacement pump’s identification marking for the 6-digit

part number. Displacement pumps use a Chromex coated rod, 3 UHM-

WPE, and 2 PTFE packings.

To order replacement parts, see Parts section starting on page 8.

* Cycle refers to combination of one upstroke and one down stroke.

Manual Description

312796 NXT

™

Air Motor

332245 Merkur High Pressure Sprayers

407053 Merkur X48 Rebuild Kit

407054 Merkur X72 Rebuild Kit

Model, Series Description

Maximum Working

Pressure

psi (MPa, bar)

Displacement

Pump Volume

Per Cycle* in cc Fluid Inlet

Fluid

Outlet

16U917, Series A Merkur X48 Pump 4800 (33, 330) 75 1-1/4 in. npt 3/8 in. npt

16U916, Series A Merkur X72 Pump 7200 (50, 500) 50 1-1/4in. npt 3/8 in. npt

ti21065a

Component Identification

332246B 3

Component Identification

Key:

A Piston/Rod Assembly

BWet Cup

C Fluid Outlet

D Fluid Inlet

E Lower Cylinder

F Upper Cylinder

G Intake Valve

F

IG

. 1. Component Identification

A

B

D

E

G

F

ti21064a

C

Repair

4332246B

Repair

General Information

Preparation

Follow all warnings and instructions in your pump man-

ual for the following preliminary steps:

1. Flush the equipment.

2. Relieve the pressure.

3. Remove the displacement pump from the pump

assembly.

Disassembly

Lay out all removed parts in sequence to ease

reassembly. Clean all parts with a compatible solvent

and inspect them for wear or damage.

1. Place cylinder (1)

sideways in a

vise with soft

jaws.

2. Use an adjustable

wrench on hex of

intake housing

(23) to unscrew it

from the lower

cylinder (2).

Loosen vice

briefly and tip out

the ball (24◆).

3. Remove the seat (22†) and use an o-ring pick to

remove the seal (26†) from the intake housing. See

F

IG

. 7.

4. Use an adjustable wrench on hex of lower cylinder

(2) to remove it from the upper cylinder (1) and slide

it straight off the pump. Be careful not to damage

the piston/rod assembly (3).

5. Remove the o-ring (21*†) from the top of the lower

cylinder.

6. Loosen the wet cup (5).

7. Pull the piston/rod assembly out the bottom of the

upper cylinder. Remove the spring (10*), piston

packings (12* and 13*) and glands (11* and 14*).

8. Remove the wet cup (5).

9. Remove the throat packings (7*, 8*) and glands (6*,

9*) from the bottom of the wet cup.

10. Remove the spring (4*) from the top of the upper

cylinder (1).

NOTICE

Reference numbers and letters in parentheses in

the text refer to the callouts in the figures and the

parts drawing.

Always use Genuine Graco Parts and Accessories,

available from your Graco distributor. If you supply

your own accessories, be sure they are adequately

sized and pressure rated for your system.

NOTICE

Repair Kits are available. See the chart on page 10

to order the correct kit(s) for your pump.

• Parts included in the Seal Repair Kit are

marked with an *, for example 8*.

• Parts included in the Seat Repair Kit are

marked with a †.

• Parts included in the Check Ball Kit are

marked with a ◆.

Threads are very sharp. To avoid cuts, use a rag to

protect hands when hand turning or carrying the dis-

placement pump.

NOTICE

The jam nut can remain attached to the upper cyl-

inder.

ti21066a

Repair

332246B 5

11. Remove the upper cylinder seal (28*).

12. Clamp the piston in a vice. Use a hex wrench to

remove the nut (17†) from end of piston.

• 16U916: 7 mm (1/4 in.) hex

• 16U917: 13 mm (1/2 in.) hex

13. Remove the o-ring (18†), seat (15†) and ball (16◆).

See F

IG

. 5.

Reassembly

1. Clean and inspect all parts.

2. Lubricate and install upper cylinder seal (28*).

3. Assemble the female gland (9*), v-packings (7*, 8*),

and male gland (6*), as shown. Alternate the

v-packings with the lips facing down. Lubricate the

packings. Install the packing stack into the wet

cup (5).

4. Install the spring (4*) in the top of the upper cylinder.

5. Lubricate the threads and screw the wet cup (5) into

the upper cylinder (1), hand tight.

F

IG

. 2. Remove Flow-Through Nut

ti12782a

NOTICE

Replace all o-rings removed from the pump. Com-

pressed o-rings may cause the pump to leak.

F

IG

. 3. Replace Throat Packings

NOTICE

All threads, packings, and seals must be well lubri-

cated. Use Lubriplate (Graco Part Number

285791) or a similar product.

*28

*9

*7

*8

*7

*8

*7

*6

5

ti11691a

Lips must

face down.

Repair

6332246B

6. Assemble the male gland (11*), v-packings (12*,

13*), and female gland (14*), as shown. Alternate

the v-packings, with the lips facing up. Lubricate the

packings. Install the spring (10*) and packing stack

into the bottom of the upper cylinder (1).

7. Place the ball (16◆) in the piston body. Install the

seat (15†) and o-ring (18†). Lubricate the o-ring and

the threads of the flow-through nut (17†). Screw the

flow-through nut (17†) into the piston/rod

assembly (3).

8. Place piston in vice and torque flow-through nut

(17†) as specified in the following table.

9. Push the piston/rod assembly (3) into the upper

cylinder (1).

10. Lubricate and install the seal (21*) on the top of the

lower cylinder (2).

F

IG

. 4. Replace piston packings.

ti21068a

10*

11*

12*

13*

12*

13*

14*

12*

5

4*

1

Lips must

face up

Displacement Pump Torque

16U916 54-66 ft-lb (73-89 N•m)

16U917 74-86 ft-lb (100-117 N•m)

F

IG

. 5. Replace piston ball and seat.

3

◆

16

†

15

†

18

†

17

ti11692a

Repair

332246B 7

11. Lubricate the threads and screw the lower cylinder

(2) onto the upper cylinder (1). Torque to 90.5-109.5

ft-lb (123-149 N•m).

12. Install the o-ring (26†) and intake seat (22†) into the

top of the inlet housing. Lubricate the o-ring. The

seat (22†) is reversible. Turn over or replace as

needed.

13. Lubricate the seal (25*†) and threads of the lower

cylinder (2). Place the ball (24◆) on the seat (22†).

14. Keep upright to screw the housing (23) into the

lower cylinder (2) hand tight, so the seat remains

firmly in place. Then clamp the cylinder in a vice and

torque to 54-66 ft-lb (73-89 N•m).

15. Torque wet cup (5) to 54-66 ft-lb (73-89 N•m).

F

IG

. 6. Assemble piston/rod assembly and cylinders.

1

3

21*

2

ti21069a

25*

†

F

IG

. 7. Replace intake ball and seat.

25

✓

24

✓

22

✓

26

✓

23

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Parts

8332246B

Parts

Lubricate.

Torque varies by lower size.

16U916: 54-66 ft-lb (73-89 N•m)

16U917: 74-86 ft-lb (100-117 N•m)

Torque to 54-66 ft-lb (73-89 N•m)

Torque to 90.5-109.5 ft-lb (123-149 N•m)

Apply thread lubricant.

1

2

3

4

5

5

25*

9*

7*

8*

7*

8*

7*

6*

1

16◆

15†

18*†

17

†

10*

11*

12*

13*

12*

13*

12*

14*

21*†

25*†

24◆

22†

26*†

23

2

3

33

34

35

ti21071a

4*

30

31*

1

1

3 5

4 5

1

1

2 5

1

1

5

3

5

3

1

Parts

332246B 9

16U916, Merkur X72

16U917, Merkur X48

----- Not sold separately.

* Included in Seal Repair Kit. See page 10.

† Included in Seat Repair Kit. Stainless steel seats also

are available. See page 10.

◆ Included in Check Ball Kit. Tungsten carbide check

balls also are available. See page 10.

Ref. Description Part Qty.

1CYLINDER KIT, upper; includes

21, 28, 32, and 33 (qty. 1)

1

16U916 16U928

16U917 16U926

2CYLINDER KIT, lower; includes

21 and 25

1

16U916 16U929

16U917 16U927

3PISTON/ROD, assembly;

includes 15-18, 36, and

37 (qty. 1)

1

16U916 24A644

16U917 24A645

4* SPRING, throat ----- 1

5WET CUP; includes 28 (qty. 1) 1

16U916 16U932

16U917 16U930

6* GLAND, male, throat ----- 1

7* PACKING, throat, UHMWPE ----- 3

8* PACKING, throat, PTFE ----- 2

9* GLAND, female, throat ----- 1

10* SPRING, piston ----- 1

11* GLAND, male, piston ----- 1

12* PACKING, piston, UHMWPE ----- 3

13* PACKING, piston, PTFE ----- 2

14* GLAND, female, piston ----- 1

15† SEAT, piston valve, tungsten

carbide

----- 1

16◆BALL, piston valve, stainless

steel

----- 1

17† NUT, flow through ----- 1

18*† O-RING, piston (10 pack) 1

16U916 16V313

16U917 24P189

21*† O-RING, lower cylinder (10 pack) 1

16U916 16V314

16U917 24P192

22† SEAT, intake valve, tungsten

carbide

----- 1

23 INTAKE VALVE KIT; includes 26 1

16U916 24A835

16U917 24A836

24◆BALL, intake valve, stainless

steel

----- 1

25*† O-RING, lower cylinder (10 pack) 2

16U916 244896

16U917 24P196

26*† O-RING, intake valve (10 pack) 24P194 1

31* O-RING, outlet (10 pack) 24E457 1

32 FITTING, outlet, 3/8-18 npt x

3/4-16 unf; includes 33 (qty. 1)

----- 1

35 JAM NUT 1

16U916 15M912

16U917 15M913

36 NUT, coupling 15T311 1

37 COLLAR, coupling; pkg. of 10 24A619 1

Ref. Description Part Qty.

Repair Kits

10 332246B

Repair Kits

Accessories

Description 16U916 16U917

Seal Repair Kit

Throat v-packings (7* and 8*) and glands (6* and 9*), piston

v-packings (12* and 13*) and glands (11* and 14*), o-rings (18*,

21*, 25*, 26*, and 33*), and springs (4*and 10*)

*24A252 *24A253

Seat Repair Kit - Tungsten Carbide (Standard)

Seats (15† and 22†), o-rings (18†, 21†, 25†, and 26†), and

flow-through nut (17†)

†24A782 †24A783

Check Ball Kit - 440 Stainless Steel (Standard)

Piston ball (16◆) and intake ball (24◆)

◆24A261 ◆24A263

Check Ball Kit - Tungsten Carbide

Piston ball (16◆) and intake ball (24◆)

◆24A667 ◆24A669

Standard Rebuild Kit

Throat v-packings (7* and 8*) and glands (6* and 9*), piston

v-packings (12* and 13*) and glands (11* and 14*), o-rings (18*,

21*, 25*, 26*, and 33*), springs (4*and 10*), piston valve ball (16),

and intake valve ball (24).

16U924 16U925

Description 16U916 16U917

Check Ball Kit - Tungsten Carbide

Piston ball (16◆) and intake ball (24◆)

◆24A667 ◆24A669

Check Ball Kit - 316 Stainless Steel

Piston ball (16◆) and intake ball (24◆). Use with materials that

cause chemical compatibility issues with 440 stainless steel or

tungsten carbide, such as acid catalyst materials.

◆24P612 ◆24P613

Reinforced PTFE V-Packing Kit

Reinforced PTFE throat packings and glands, reinforced PTFE

piston packings and glands, o-rings, and springs. Use with chem-

ical resistance and higher temperatures.

24J853 24J854

Dimensions

332246B 11

Dimensions

* Height measured at mid-stroke.

F

IG

. 8

Displacement

Pump

A

(Height*)

in. (mm)

B

(Inlet Size)

in. npt

C

(Outlet Size)

in. npt

Weight

lbs (kg)

16U916 15.2 (386) 1-1/4 in. 3/8 in. 15.5 (7)

16U917 15.7 (399) 1-1/4 in. 3/8 in. 16.1 (7.3)

CC

A

A

ti21072a

BB

16U91716U916

Technical Data

12 332246B

Technical Data

Merkur High Pressure Displacement Pump

US Metric

Maximum Operating Temperature 160°F 71°C

Stroke Length 2.5 in. 63.5 mm

Wetted Parts carbon steel, tungsten carbide, UHMWPE, PTFE

Maximum Fluid Working Pressure

16U916 7200 psi 50 MPa, 500 bar

16U917 4800 psi 33 MPa, 330 bar

Inlet/Outlet Sizes

Fluid inlet size 1-1/4 in. npt

Fluid outlet size 3/8 in. npt

Technical Data

332246B 13

All written and visual data contained in this document reflects the latest product information available at the time of publication.

Graco reserves the right to make changes at any time without notice.

This manual contains English. MM 332246

Graco Headquarters: Minneapolis

International Offices: Belgium, China, Japan, Korea

GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA

Copyright 2013, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.

www.graco.com

Revision B, October 2014

Graco Standard Warranty

Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in

material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty

published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by

Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written

recommendations.

This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty

installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of

non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with

structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or

maintenance of structures, accessories, equipment or materials not supplied by Graco.

This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification of

the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be returned

to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or workmanship, repairs

will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.

THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT

LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.

Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy

(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental or

consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.

GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT

MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to

the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these

warranties.

In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder, or

the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the

negligence of Graco, or otherwise.

FOR GRACO CANADA CUSTOMERS

The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered into,

given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu que la

rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés, à la suite

de ou en rapport, directement ou indirectement, avec les procédures concernées.

Graco Information

For the latest information about Graco products, visit www.graco.com.

TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.

Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505