Repair-Parts
Repair Kits
Accessory Kits
See page 10
®
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 instructions see your sprayer manual. Hazard symbols refer to specific procedure risks. Save all
instructions.
332246B
EN
ti21064a
Related Manuals
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
Manual Description
312796
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.
NXT
™
Air Motor
To order replacement parts, see Parts section starting on page 8.
Maximum Working
Pressure
Model, Series Description
16U917, Series A Merkur X48 Pump
16U916, Series A Merkur X72 Pump
* Cycle refers to combination of one upstroke and one down stroke.
psi (MPa, bar)
4800 (33, 330) 75 1-1/4 in. npt 3/8 in. npt
7200 (50, 500) 50 1-1/4in. npt 3/8 in. npt
Displacement
Pump Volume
Per Cycle* in cc Fluid Inlet
ti21065a
Fluid
Outlet
2 332246B
Component Identification
Component Identification
F
IG
. 1. Component Identification
A
B
C
F
E
G
D
ti21064a
Key:
A Piston/Rod Assembly
BWet Cup
C Fluid Outlet
D Fluid Inlet
E Lower Cylinder
F Upper Cylinder
G Intake Valve
332246B 3
Repair
Repair
General Information
NOTICE
Threads are very sharp. To avoid cuts, use a rag to
protect hands when hand turning or carrying the displacement pump.
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:
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*).
ti21066a
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 ◆.
4 332246B
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).
Repair
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
ti12782a
F
IG
. 2. Remove Flow-Through Nut
Reassembly
1. Clean and inspect all parts.
NOTICE
Replace all o-rings removed from the pump. Compressed o-rings may cause the pump to leak.
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
*7
*8
13. Remove the o-ring (18†), seat (15†) and ball (16◆).
See F
IG
. 5.
*7
*8
*7
Lips must
face down.
*6
*28
ti11691a
F
IG
. 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
4*
1
10*
11*
12*
13*
12*
13*
12*
Lips must
face up
14*
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)
3
◆
16
†
15
†
18
†
17
IG
. 5. Replace piston ball and seat.
F
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).
ti11692a
ti21068a
F
IG
. 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).
1
3
21*
2
13. Lubricate the seal (25*†) and threads of the lower
cylinder (2). Place the ball (24◆) on the seat (22†).
25
✓
24
✓
22
✓
26
✓
23
ti21070a
F
IG
. 7. Replace intake ball and seat.
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*
ti21069a
F
IG
. 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.
†
15. Torque wet cup (5) to 54-66 ft-lb (73-89 N•m).
332246B 7
Parts
Parts
35
1
34
33
5
3
5
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.
9*
7*
8*
1
8*
7*
3
7*
6*
25*
4*
16◆
1
1
31*
5
30
3
15†
18*†
17
†
21*†
4 5
1
2 5
1
2
10*
3 5
11*
25*†
1
12*
13*
1
12*
13*
24◆
22†
26*†
23
1
12*
14*
ti21071a
8 332246B
16U916, Merkur X72
16U917, Merkur X48
Parts
Ref. Description Part Qty.
CYLINDER KIT, upper; includes
1
21, 28, 32, and 33 (qty. 1)
16U916 16U928
16U917 16U926
CYLINDER KIT, lower; includes
2
21 and 25
16U916 16U929
16U917 16U927
PISTON/ROD, assembly;
3
includes 15-18, 36, and
37 (qty. 1)
16U916 24A644
16U917 24A645
SPRING, throat
4*
WET CUP; includes 28 (qty. 1) 1
5
GLAND, male, throat ----- 1
6*
PACKING, throat, UHMWPE ----- 3
7*
PACKING, throat, PTFE ----- 2
8*
GLAND, female, throat ----- 1
9*
SPRING, piston ----- 1
10*
GLAND, male, piston ----- 1
11*
PACKING, piston, UHMWPE ----- 3
12*
PACKING, piston, PTFE ----- 2
13*
GLAND, female, piston ----- 1
14*
SEAT, piston valve, tungsten
15†
carbide
BALL, piston valve, stainless
16◆
steel
NUT, flow through ----- 1
17†
O-RING, piston (10 pack) 1
18*†
O-RING, lower cylinder (10 pack) 1
21*†
SEAT, intake valve, tungsten
22†
carbide
INTAKE VALVE KIT; includes 26 1
23
BALL, intake valve, stainless
24◆
steel
16U916 16U932
16U917 16U930
16U916 16V313
16U917 24P189
16U916 16V314
16U917 24P192
16U916 24A835
16U917 24A836
-----
----- 1
----- 1
----- 1
----- 1
1
1
1
1
Ref. Description Part Qty.
O-RING, lower cylinder (10 pack) 2
25*†
O-RING, intake valve (10 pack) 24P194 1
26*†
O-RING, outlet (10 pack) 24E457 1
31*
FITTING, outlet, 3/8-18 npt x
32
3/4-16 unf; includes 33 (qty. 1)
JAM NUT 1
35
NUT, coupling 15T311 1
36
COLLAR, coupling; pkg. of 10 24A619 1
37
----- 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.
16U916 244896
16U917 24P196
----- 1
16U916 15M912
16U917 15M913
332246B 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)
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◆)
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).
†24A782 †24A783
◆24A261 ◆24A263
◆24A667 ◆24A669
16U924 16U925
Accessories
Description 16U916 16U917
Check Ball Kit - Tungsten Carbide
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.
◆24A667 ◆24A669
◆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 chemical resistance and higher temperatures.
10 332246B
24J853 24J854
Dimensions
Dimensions
16U91716U916
C
B
FIG. 8
Displacement
Pump
16U916
16U917
* Height measured at mid-stroke.
A
(Height*)
in. (mm)
15.2 (386) 1-1/4 in. 3/8 in. 15.5 (7)
15.7 (399) 1-1/4 in. 3/8 in. 16.1 (7.3)
B
(Inlet Size)
in. npt
A
(Outlet Size)
B
C
in. npt
A
C
ti21072a
Weight
lbs (kg)
332246B 11
Technical Data
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
12 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 reconnaissen
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.
t avoir convenu que la
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 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.
Graco reserves the right to make changes at any time without notice.
For patent information,
Original instructions.
This manual contains English. MM 332246
see www.graco.com/patents.
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
www.graco.com
Revision B, October 2014
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