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

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Repair-Parts

Repair Kits
Accessory Kits
See page 10

Merkur® High Pressure
Displacement Pump

332246B
EN

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 instructions see your sprayer manual. Hazard symbols refer to specific procedure risks. Save all
instructions.

ti21064a

Related Manuals

Contents

Related Manuals

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

Manual

Description

312796

NXT™ Air Motor

332245

Merkur High Pressure Sprayers

407053

Merkur X48 Rebuild Kit

407054

Merkur X72 Rebuild Kit

Models
Check your displacement pump’s identification marking for the 6-digit
part number. Displacement pumps use a Chromex coated rod, 3 UHMWPE, and 2 PTFE packings.
To order replacement parts, see Parts section starting on page 8.

ti21065a

*

2

Maximum Working
Pressure
psi (MPa, bar)

Displacement
Pump Volume
Per Cycle* in cc

Fluid Inlet

Fluid
Outlet

Model, Series

Description

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

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

332246B

Component Identification

Component Identification
A
B

C

F

E

G
D
ti21064a

FIG. 1. Component Identification
Key:
A Piston/Rod Assembly
B Wet Cup
C Fluid Outlet
D Fluid Inlet
E Lower Cylinder
F Upper Cylinder
G Intake Valve

332246B

3

Repair

Repair

General Information
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.

Preparation

Follow all warnings and instructions in your pump manual for the following preliminary steps:

Threads are very sharp. To avoid cuts, use a rag to
protect hands when hand turning or carrying the displacement pump.
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◆).

ti21066a

3. Remove the seat (22†) and use an o-ring pick to
remove the seal (26†) from the intake housing. See
FIG. 7.

1. Flush the equipment.
2. Relieve the pressure.
3. Remove the displacement pump from the pump
assembly.

Disassembly

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).

Lay out all removed parts in sequence to ease
reassembly. Clean all parts with a compatible solvent
and inspect them for wear or damage.
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 ◆.

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.
NOTICE
The jam nut can remain attached to the upper cylinder.
10. Remove the spring (4*) from the top of the upper
cylinder (1).

4

332246B

Repair

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

Reassembly

12. Clamp the piston in a vice. Use a hex wrench to
remove the nut (17†) from end of piston.

1. Clean and inspect all parts.

•
•

NOTICE
Replace all o-rings removed from the pump. Compressed o-rings may cause the pump to leak.

16U916: 7 mm (1/4 in.) hex
16U917: 13 mm (1/2 in.) hex

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).

5
*9
ti12782a

FIG. 2. Remove Flow-Through Nut
13. Remove the o-ring (18†), seat (15†) and ball (16◆).
See FIG. 5.

*7
*8
*7
*8
*7

Lips must
face down.

*6
*28
ti11691a

FIG. 3. Replace Throat Packings
4. Install the spring (4*) in the top of the upper cylinder.
NOTICE
All threads, packings, and seals must be well lubricated. Use Lubriplate (Graco Part Number
285791) or a similar product.
5. Lubricate the threads and screw the wet cup (5) into
the upper cylinder (1), hand tight.

332246B

5

Repair

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).

5

8. Place piston in vice and torque flow-through nut
(17†) as specified in the following table.
Displacement Pump

Torque

16U916

54-66 ft-lb (73-89 N•m)

16U917

74-86 ft-lb (100-117 N•m)

4*

1

3

10*

◆16

11*

†15
†18
ti11692a
†17
FIG. 5. Replace piston ball and seat.

12*
13*
12*
13*
12*
14*

Lips must
face up

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).

ti21068a

FIG. 4. Replace piston packings.
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).

6

332246B

Repair

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).

13. Lubricate the seal (25*†) and threads of the lower
cylinder (2). Place the ball (24◆) on the seat (22†).

25✓
24✓
1

22✓
26✓
23

3
ti21070a

FIG. 7. Replace intake ball and seat.

21*

ti21069a

2

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).

25*†

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

FIG. 6. Assemble piston/rod assembly and cylinders.
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.

332246B

7

Parts

Parts
35
34

1

Lubricate.

2

Torque varies by lower size.
16U916: 54-66 ft-lb (73-89 N•m)
16U917: 74-86 ft-lb (100-117 N•m)

3

Torque to 54-66 ft-lb (73-89 N•m)

4

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

5

Apply thread lubricant.

33

5

3

5
9*
7*
8*
7*
8*
7*
6*

1

3

25*
4*
16◆
15†

1

3

1

31*

5

30

18*†

1

17†

2

21*†
4

5
1

5

2
10*

3

5

11*
12*
13*
1

12*
13*

25*†
24◆
22†

1

26*†

1

23

12*
14*
ti21071a

8

332246B

Parts

16U916, Merkur X72
16U917, Merkur X48
Ref. Description
CYLINDER KIT, upper; includes
1
21, 28, 32, and 33 (qty. 1)
16U916
16U917
CYLINDER
KIT, lower; includes
2
21 and 25
16U916
16U917
PISTON/ROD,
assembly;
3
includes 15-18, 36, and
37 (qty. 1)
16U916
16U917
SPRING,
throat
4*
WET CUP; includes 28 (qty. 1)
5
16U916
16U917
GLAND,
male, throat
6*
PACKING, throat, UHMWPE
7*

16U932
16U930
-----

1

-----

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
BALL, piston valve, stainless
steel
NUT, flow through

-----

1

-----

1

-----

1

16◆
17†

18*† O-RING, piston (10 pack)
16U916
16U917
O-RING,
lower cylinder (10 pack)
21*†
16U916
16U917
SEAT,
intake
valve, tungsten
22†
carbide
INTAKE VALVE KIT; includes 26
23
16U916
16U917
BALL,
intake
valve, stainless
24◆
steel

332246B

Part

Qty.
1

16U928
16U926
1
16U929
16U927
1

24A644
24A645
-----

Ref.

Description
25*† O-RING, lower cylinder (10 pack)
16U916
16U917
26*† O-RING, intake valve (10 pack)
31* O-RING, outlet (10 pack)

Part

32

Qty.
2

244896
24P196
24P194

1

24E457

1

-----

1

36

FITTING, outlet, 3/8-18 npt x
3/4-16 unf; includes 33 (qty. 1)
JAM NUT
16U916
16U917
NUT, coupling

1
15M912
15M913
15T311 1

37

COLLAR, coupling; pkg. of 10

24A619

35

1

1
1

----- 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.

1
16V313
24P189
1
16V314
24P192
-----

1
1

24A835
24A836
-----

1

9

Repair Kits

Repair Kits
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)

†24A782

†24A783

◆24A261

◆24A263

◆24A667

◆24A669

Seats (15† and 22†), o-rings (18†, 21†, 25†, and 26†), and
flow-through nut (17†)
Check Ball Kit - 440 Stainless Steel (Standard)
Piston ball (16◆) and intake ball (24◆)
Check Ball Kit - Tungsten Carbide
Piston ball (16◆) and intake ball (24◆)
16U924
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).

16U925

Accessories
Description

16U916

16U917

Check Ball Kit - Tungsten Carbide

◆24A667

◆24A669

◆24P612

◆24P613

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

24J853
Reinforced PTFE V-Packing Kit
Reinforced PTFE throat packings and glands, reinforced PTFE
piston packings and glands, o-rings, and springs. Use with chemical resistance and higher temperatures.

10

24J854

332246B

Dimensions

Dimensions
16U916

16U917

A

A
C

C

B

B

ti21072a

FIG. 8

Displacement
Pump

A
(Height*)

B
(Inlet Size)

C
(Outlet Size)

Weight

in. (mm)

in. npt

in. npt

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)

* Height measured at mid-stroke.

332246B

11

Technical Data

Technical Data
Merkur High Pressure Displacement Pump
Maximum Operating Temperature
Stroke Length
Wetted Parts
Maximum Fluid Working Pressure
16U916
16U917
Inlet/Outlet Sizes
Fluid inlet size
Fluid outlet size

12

US
Metric
160°F
71°C
2.5 in.
63.5 mm
carbon steel, tungsten carbide, UHMWPE, PTFE
7200 psi
4800 psi

50 MPa, 500 bar
33 MPa, 330 bar
1-1/4 in. npt
3/8 in. npt

332246B

Technical Data

332246B

13

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

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.

For patent information, see www.graco.com/patents.
Original instructions. 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



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Keywords                        : "MM 332246, 332246, 332246B, 332246EN-B, 332246EN, Merkur High Pressure Displacement Pump"
Web Statement                   : 332246B - Merkur High Pressure Displacement Pump, Repair-Parts, English
Modify Date                     : 2014:10:22 11:07:12-05:00
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Format                          : application/pdf
Title                           : 332246B - Merkur High Pressure Displacement Pump, Repair-Parts, English
Creator                         : Emily Bringle
Description                     : Merkur High Pressure Displacement Pump
Subject                         : MM 332246, 332246, 332246B, 332246EN-B, 332246EN, Merkur High Pressure Displacement Pump
Document ID                     : uuid:ad990be3-2c1c-4a41-a925-7623b22bebb2
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Page Count                      : 14
Language                        : en
Author                          : Emily Bringle

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