Instructions - Parts Merkur® Pump Assembly 312794E ENG For high-performance finishing and coating applications in hazardous or non-hazardous locations. For professional use only. Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions. See page 4 for model information, including maximum working pressure.
Contents Pump Part Number Matrix . . . . . . . . . . . . . . . . . . . 3 Pump Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Component Identification . . . . . . . . . . . . . . . . . . . . 7 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 General Information . . . . . . . . . . . . . . . . . . . . . .
Pump Part Number Matrix Pump Part Number Matrix ID Check your pump’s identification plate (ID) for the 6-digit part number. Use the following matrix to define the construction of your pump, based on the six digits. For example, Part No. W 1 5 A A S represents a wet cup pump (W), 15 to 1 ratio (15), 25 cc lower (A), 3 UHMWPE/2 PTFE packings with chromex rod coating, no data monitoring, low noise exhaust (A), and stainless steel construction (S).
Pump Models Pump Models Model, Series Air Motor W10CAS, Series A M04LN0 W10CBS, Series A M04LT0 W15AAS, Series A M02LN0 W15BAS, Series A M04LN0 W15BBS, Series A M04LT0 W15FAS, Series A M12LN0 W15FBS, Series A M12LT0 W18EAS Series A M12LN0 W18EBS, Series A M12LT0 W23DAS, Series A M12LN0 W23DBS, Series A M12LT0 W24FAS, Series A M18LN0 W24FBS, Series A M18LT0 W28EAS, Series A M18LN0 W28EBS, Series A M18LT0 W30AAS, Series A M04LN0 W30ABS, Series A M04LT0 W30CAS, Series A M12LN0 W30CBS, Series A M12LT0 W36DAS
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable. WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode.
Related Manuals WARNING PRESSURIZED EQUIPMENT HAZARD Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on skin and cause serious injury. • Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment. • Tighten all fluid connections before operating the equipment. • Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
Component Identification Component Identification N A K L J H D B M G E F ti11700a FIG. 1.
Installation Installation General Information Reference numbers and letters in parentheses in the text refer to the callouts in the figures and the parts drawing. Pump: See FIG. 2. Verify that the ground screw (GS) is attached and tightened securely to the air motor. Connect the other end of the ground wire (U) to a true earth ground. U Always use Genuine Graco Parts and Accessories, available from your Graco distributor.
Installation Mount the Pump Mount the pump only to Graco wall bracket 15T795, or to a Graco cart, available from your distributor. Pump dimensions are shown on page 28. For wall mounted pumps, follow these guidelines: • Pump air regulator (H): controls pump speed and outlet pressure. Locate it close to the pump. • Air line filter (B): removes harmful dirt and moisture from compressed air supply. • Air shutoff valve (A): isolates air line accessories for servicing.
Installation Typical Installation A B C D E F G H J K Air Shutoff Valve Air Filter (optional accessory) Gun Air Pressure Gauge Gun Air Pressure Regulator Bleed Type Master Air Valve DataTrak Pump Air Pressure Gauge Pump Air Pressure Regulator Solenoid Release Button (not visible) Gun Swivel L M N P R S T U V W Air-Assisted Spray Gun Gun Fluid Supply Hose Gun Air Supply Hose Fluid Filter Pump Fluid Outlet Grounding Wire Wet-Cup (not visible, see FIG.
Operation Operation Pressure Relief Procedure Trigger Lock Always engage the trigger lock when you stop spraying to prevent the gun from being triggered accidentally by hand or if dropped or bumped. Trapped air can cause the pump to cycle unexpectedly, which could result in serious injury from splashing or moving parts. Wet Cup 1. Engage the trigger lock. 2. Close the bleed-type master air valve. 3. Disengage the trigger lock.
Operation Prime and Adjust the Pump 1. Lock gun trigger. Remove tip guard and spray tip from gun. Refer to gun manual. 2. Close gun air regulator and pump air regulator (H) by turning knobs counterclockwise reducing pressure to zero. Close bleed-type air valve (E). Also verify that all drain valves are closed. 3. Check that all fittings throughout system are tightened securely. 4. Position pail close to pump. Do not stretch suction hose tight/let it hang to assist fluid flow into pump. 12.
Maintenance Maintenance Preventive Maintenance Schedule The operating conditions of your particular system determine how often maintenance is required. Establish a preventive maintenance schedule by recording when and what kind of maintenance is needed, and then determine a regular schedule for checking your system. Tighten Threaded Connections Before each use, check all hoses for wear or damage. Replace as necessary. Check that all threaded connections are tight and leak-free. 3.
Troubleshooting Troubleshooting NOTE: Check all possible problems and causes before disassembling the pump. Relieve the pressure before checking or servicing the equipment. Problem Pump output low on both strokes. Pump output low on only one stroke. Cause Solution Restricted air supply lines. Clear any obstructions; be sure all shutoff valves are open; increase pressure, but do not exceed maximum working pressure. Exhausted fluid supply. Refill and reprime pump.
Repair Repair 6. Lower the coupling nut (9) enough to remove the coupling collars (10), and then remove the coupling nut (9). 9 General Information • 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. Disconnect the Displacement Pump 1.
Repair Reconnect the Displacement Pump 6. Align fluid outlet as shown and tighten the jam nut. 7. Align the TSL reservoir (7) and push it down into place. 1. Tilt the air motor onto its back, then hand turn the displacement pump into the adapter plate. Set the pump upright again. 2. Hold the air motor piston rod up with one hand. With your other hand, put the coupling nut (9) on the displacement rod. 3. Put the coupling collars (10) into the coupling nut (9) so large flanges point upward. 10 8.
Repair Disconnect the Air Motor 1. Flush the pump, if possible. (See page 13.) Relieve the pressure. (See page 11.) 2. Disconnect the air and fluid hoses, the ground wire (13), and the tie rod shield (11). 3. Hold the flats of the air motor piston rod with a wrench. Use another wrench to loosen the coupling nut (9). 4. Use a socket to remove the tie rod nuts (6): 13 mm for M02xxx, 23 mm for all others. 5. Use a 13 mm socket to remove the top two mounting screws (MS). 6.
Pump Parts Pump Parts 1 Torque varies by air motor size. M02xxx: 5-10 ft-lb (7-13.5 N•m) All others: 50-55 ft-lb (68-75 N•m) 2 1 Torque varies by air motor size. M02xxx: 15-20 ft-lb (20-27 N•m) All others: 50-60 ft-lb (68-81 N•m) 3 Torque varies by displacement pump size.
Pump Parts Ref. Part No. 1 2 3* 4 5* See Table See Table See Table See Table 6* 7* 8* 9* Qty . Description MOTOR DISPLACEMENT PUMP ADAPTER, pump NUT, jam ROD, tie 15M661 M02xxx motor 15M662 All other motor sizes NUT, tie rod 104541 M02xxx motor 15U606 All other motor sizes See Table RESERVOIR, TSL See Table ADAPTER, 1/2-20 ID X M22 x 1.5 OD NUT, coupling LW025x displacement 15M758 pumps All other pump sizes 15T311 1 1 1 1 3 3 3 3 1 Ref. Part No. 10* ----- 11* 12* 13* Qty .
Repair Kits Repair Kits LW025A Kit Description 2.5 in. motor 3.5 in. motor LW050A 3.5 in. motor 6-7.5 in motor LW075A 3.5 in. motor 6-7.
Performance Charts Performance Charts Model W10xxx 10:1 Ratio, 75 cc/cycle Cycles per Minute 1000 (7, 70) 20 40 30 50 60 16 (0.45) 14 (0.4) A 800 (5.5, 55) 12 (0.34) A 600 (4, 40) 10 (0.28) B 8 (0.23) B 400 (3, 30) 6 (0.17) C C 4 (0.1) 200 (1.4, 14) 0 Air Flow scfm (m3/min) Fluid Outlet Pressure psi (MPa, bar) 10 2 (.06) 0.2 (0.75) 0 0.6 (2.3) 0.4 (1.5) 0.8 (3.0) 1.0 (3.8) 1.2 (4.5) Fluid Flow gpm (lpm) tested in No. 10 weight oil KEY A = 100 psi (0.
Performance Charts Model W15Bxx 8 Cycles per Minute 15 23 30 38 45 53 61 18 (0.5) 16 (0.45) 14 (0.4) 12 (0.34) 10 (0.28) 1400 (10, 100) A 1200 (8, 80) 1000 (7, 70) B 800 (5.5, 55) 600 (4, 40) Air Flow scfm (m3/min) 1600 (11, 110) A B 8 (0.23) C 400 (3, 30) 6 (0.17) 4 (0.1) 2 (.06) C 200 (1.4, 14) 0 0.1 (0.4) 0 0.2 (0.8) 0.3 (1.1) 0.4 (1.5) 0.5 (1.9) 0.7 (2.6) 0.6 (2.3) 0.8 (3.0) Fluid Flow gpm (lpm) tested in No. 10 weight oil A = 100 psi (0.7 MPa, 7 bar) B = 70 psi (0.
Performance Charts Model W18xxx Cycles per Minute 30 15 45 61 2000 (14, 140) A A 1600 (11, 110) 40 (1.1) 30 (0.9) B 1200 (8, 80) B C 800 (5.5, 55) 20 (0.6) C 400 (3, 30) 0 10 (0.3) 0.5 (1.9) 0 1.0 (3.8) Air Flow scfm (m3/min) Fluid Outlet Pressure psi (MPa, bar) 18:1 Ratio, 125 cc/cycle 2.0 (7.6) 1.5 (5.7) Fluid Flow gpm (lpm) tested in No. 10 weight oil KEY A = 100 psi (0.7 MPa, 7 bar) B = 70 psi (0.5 MPa, 5 bar) C = 40 psi (0.
Performance Charts Model W24xxx 24:1 Ratio, 150 cc/cycle 63 51 70 (2.0) A 2500 (17, 170) A 2000 (14, 140) 60 (1.7) B 50 (1.4) B 40 (1.1) 1500 (10, 100) C 1000 (7, 70) 30 (0.9) 20 (0.6) C 500 (3, 30) 0 10 (0.3) 2.5 (9.5) 2.0 (7.6) 1.5 (5.7) 1.0 (3.8) 0.5 (1.9) 0 Fluid Flow gpm (lpm) tested in No. 10 weight oil Fluid Outlet Pressure psi (MPa, bar) 15 3000 (21, 210) Cycles per Minute 30 KEY A = 100 psi (0.7 MPa, 7 bar) B = 70 psi (0.5 MPa, 5 bar) C = 40 psi (0.
Performance Charts Model W30Axx 30:1 Ratio, 25 cc/cycle 30 38 45 53 61 3000 (21, 210) A 2500 (17, 170) A 2000 (14, 140) B B 1500 (10, 100) 8 (0.23) 6 (0.17) C 1000 (7, 70) C 4 (0.1) 2 (.06) 500 (3, 30) 0 0 0.05 (0.2) 0.1 (0.4) 0.15 (0.6) 0.2 (0.75) 0.25 (0.9) 0.3 (1.1) 0.35 (1.3) 0.4 (1.5) Fluid Flow gpm (lpm) tested in No. 10 weight oil 10 Cycles per Minute 20 30 40 KEY A = 100 psi (0.7 MPa, 7 bar) B = 70 psi (0.5 MPa, 5 bar) C = 40 psi (0.
Performance Charts Model W36xxx 36:1 Ratio, 100 cc/cycle 15 Cycles per Minute 23 30 38 45 53 61 60 (1.7) 4000 (28, 280) 3500 (24, 240) A 3000 (21, 210) 2500 (17, 170) 50 (1.4) A 40 (1.1) B 2000 (14, 140) 1500 (10, 100) B 30 (0.9) C C 20 (0.6) 1000 (7, 70) 10 (0.3) 500 (3, 30) 0 Air Flow scfm (m3/min) Fluid Outlet Pressure psi (MPa, bar) 8 0 0.2 (0.75) 0.4 (1.5) 0.6 (2.3) 0.8 (3.0) 1.0 (3.8) 1.2 (4.5) 1.4 (5.3) 1.6 (6.1) Fluid Flow gpm (lpm) tested in No.
Performance Charts Model W48xxx 10 6000 (42, 420) 5000 (35, 350) Cycles per Minute 20 30 40 50 60 60 (1.7) A A 50 (1.4) 4000 (28, 280) B 40 (1.1) B 3000 (21, 210) C 2000 (14, 140) 30 (0.9) C 20 (0.6) 1000 (7, 70) 0 Air Flow scfm (m3/min) Fluid Outlet Pressure psi (MPa, bar) 48:1 Ratio, 75 cc/cycle 10 (0.3) 0 0.2 (0.75) 0.4 (1.5) 0.6 (2.3) 0.8 (3.0) 1.0 (3.8) 1.2 (4.5) Fluid Flow gpm (lpm) tested in No. 10 weight oil KEY A = 100 psi (0.7 MPa, 7 bar) B = 70 psi (0.
Pump Dimensions Pump Dimensions D B A C ti12862a A B C D Weight in. (mm) in. (mm) in (mm) in (mm) lbs (kg) W10xxx 24.6 (625) 5.6 (142) 5.8 (147) 7.8 (198) 30 (14) W15Axx 24.1 (612) 4.2 (107) 5.1 (130) 6.2 (157) 15 (7) W15Bxx 24.0 (610) 5.6 (142) 5.8 (147) 7.8 (198) 28 (13) W15Fxx 25.2 (640) 8.6 (218) 11.7 (297) 11.4 (290) 61 (28) W18xxx 25.2 (640) 8.6 (218) 11.7 (297) 11.4 (290) 61 (28) W23xxx 25.1 (638) 8.6 (218) 11.7 (297) 11.4 (290) 59 (27) W24xxx 25.
Wall Bracket Mounting Dimensions Wall Bracket Mounting Dimensions 11 in. (279 mm) 4 in. (102 mm) Four 0.40 in. (10 mm) mounting holes ti12833a Technical Data Maximum fluid working pressure . . . . . . . . . . . . . . . . . . . Maximum air inlet pressure . . . . . . . . . . . . . . . . . . . . . . . Minimum air inlet pressure . . . . . . . . . . . . . . . . . . . . . . . . Air consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fluid flow at 60 cycles per minute . . . . . . . . .
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.
