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Table of Contents
Repair/Parts
Merkur
Displacement Pump
For use with high-performance finishing and coating pumps in hazardous and
non-hazardous locations. For professional use only.
Important Safety Instructions
Read all warnings and instructions in this manual.
For complete warnings and instructions see your
pump or package manual. Hazard symbols refer to
specific procedure risks. Save all instructions.
See page 3 for model information, including maximum working pressures.
LW025A
®
TI11643a
LW150A
312792F
ENG
TI11645
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Table of Contents
Related Manuals for Graco Merkur A Series
Summary of Contents for Graco Merkur A Series
- Page 1 Repair/Parts ® Merkur 312792F Displacement Pump For use with high-performance finishing and coating pumps in hazardous and non-hazardous locations. For professional use only. Important Safety Instructions Read all warnings and instructions in this manual. For complete warnings and instructions see your pump or package manual.
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Page 2: Table Of Contents
Disassembly ......5 Graco Information ......14 Reassembly . -
Page 3: Models
Models Models Check your displacement pump’s identification marking for the 6-digit part number. Use the following matrix to define the construction of your displace- ment pump. For example, displacement pump model LW025A represents a wet-cup style stainless steel displacement pump, 25 cc, with a Chromex coated rod and 3 UHMWPE, 2 PTFE packings. -
Page 4: Component Identification
Component Identification Component Identification ti11645a . 1. Component Identification Key: Piston/Rod Assembly Wet Cup Fluid Outlet Fluid Inlet Lower Cylinder Upper Cylinder Intake Valve 312792F... -
Page 5: Repair
2. Use an adjustable Always use Genuine Graco Parts and Accessories, wrench on hex of available from your Graco distributor. If you supply intake housing your own accessories, be sure they are adequately (23) to unscrew it sized and pressure rated for your system. -
Page 6: Reassembly
4. Install the spring (4*) in the top of the upper cylinder. NOTICE All threads, packings, and seals must be well lubri- cated. 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. - Page 7 Repair 6. Assemble the male gland (11*), v-packings (12*, 8. Place piston in vice and torque flow-through nut 13*), and female gland (14*), as shown. Alternate (17†) as specified in the following table. the v-packings, with the lips facing up. Lubricate the packings.
- Page 8 Repair 14. Lubricate the seal (25*†) and threads of the lower cylinder (2). Place the ball (24◆) on the seat (22†). ✓ ✓ ✓ ✓ ti11694a . 7. Replace intake ball and seat. 15. Keep upright to screw the housing (23) into the lower cylinder (2) hand tight, so the seat remains firmly in place.
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Page 9: Parts
Parts Parts Lubricate. Torque to 58-62 ft-lb (78-84 N•m) Torque to 95-105 ft-lb (128-142 N•m) Torque varies by lower size. LW025A-LW050A: 58-62 ft-lb (78-84 N•m) LW075A-LW150A: 78-82 ft-lb (105-111 N•m) Apply thread lubricant. ◆ † † † † † ◆ †... - Page 10 Parts Ref. Description Part Qty. Ref. Description Part Qty. 21*† O-RING, lower cylinder ----- CYLINDER KIT, upper; includes 21, 28, 32, and 33 (qty. 1) SEAT, intake valve, tungsten ----- 22† LW025A 24A813 carbide LW050A 24A814 INTAKE VALVE KIT; includes 26 LW075A 24A815 LW025A...
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Page 11: Repair Kits
Repair Kits Repair Kits Kit Description LW025A LW050A LW075A LW100A LW125A LW150A * Seal Repair Kit Throat v-packings (7* and 8*) and glands (6* and 9*), piston v-packings (12* and 13*) and 24A251 24A252 24A253 24A254 24A255 24A256 glands (11* and 14*), o-rings (18*, 21*, 25*, 26* 27*, 28*, and 33*), and springs (4*and 10*) V-Packing Repair Kit Throat v-packings (7* and 8*), piston v-packings... -
Page 12: Dimensions
Dimensions Dimensions Model LW025A Model LW150A ti11643a ti11645a Displacement Pump Dimensions Displacement (Height*) (Inlet Size) (Outlet Size) Weight Pump in. (mm) in. npt in. npt lbs (kg) 14.9 (378) 1/2 in. 3/8 in. 9.0 (4.1) LWO25A 14.8 (376) 3/4 in. 3/8 in. -
Page 13: Technical Data
Technical Data Technical Data Maximum fluid working pressure LW025A ........3000 psi (20.7 MPa, 207 bar) LW050A . -
Page 14: Graco Standard Warranty
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.