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Maintenance

 3A8429A

33

3.

Slide pump assembly off the mounting 

pins.

ProXChange Removal Tool

An integrated tool is included in the frame to

remove the ProXChange packing assembly.

See Pump repair manual for complete repair

instructions.

Inlet Valve Removal

An integrated tool is included in the frame to

remove the inlet valve assembly from the

pump. If you suspect that the inlet valve is

clogged or stuck, remove the valve assembly

and clean or replace.
1.

Remove suction tube or hopper from 

sprayer.

2.

Insert pump inlet into frame and loosen 

the inlet valve. Remove inlet valve.

NOTICE

Do not lose the ball and spring inside the inlet 

valve assembly. It may fall out when the inlet 

valve is removed. Pump will not prime without 

the ball and spring.

ti27498a

Summary of Contents for GX21 Cordless

Page 1: ...21 Cordless Models 25T973 25T967 3000 psi 207 bar 20 7 MPa Maximum Working Pressure Important Safety Instructions Read all warnings and instructions in this manual and related manuals Be familiar with...

Page 2: ...p and Pressure Selection 20 Spray Techniques 21 Triggering Gun 21 Aiming Gun 22 Spray Pattern Quality 22 Clear Tip Clog 22 Cleanup 23 Power Flush 25 Cleaning InstaClean Fluid Filter 27 Clean the Gun 2...

Page 3: ...B546 54V 2ah 18V 6ah DCB609 60V 3ah 20V 9ah DCB547 54V 3ah 18V 9ah DCB548 54V 4ah 18V 12ah DCB612 60V 4ah 20V 12ah Related DEWALT Manuals Model Region Stand Battery Voltage VDC Charger Voltage VAC GX2...

Page 4: ...and Clamp Required Type of Material WATER BASED The container label should indicate that the material can be cleaned up with soap and water OIL BASED The container label should indicate that the mater...

Page 5: ...sure airless paint sprayer hoses Follow Grounding Instructions page 9 Verify that all containers and collection systems are grounded to prevent static discharge Do not use pail liners unless they are...

Page 6: ...the trigger lock when not spraying Verify the trigger lock is functioning properly Verify that all connections are secure before operating the unit Know how to stop the unit and bleed pressure quickl...

Page 7: ...an a cloth moistened with water MOVING PARTS HAZARD Moving parts can pinch cut or amputate fingers and other body parts Keep clear of moving parts Do not operate equipment with protective guards or co...

Page 8: ...ube with Diffuser N Fluid Intake Suction Tube P ProXChange Pump behind easy access door Q Gun Fluid Filter inside handle R Fluid Outlet Fitting airless hose connection S Grounding Wire with Clamp T In...

Page 9: ...outlet adapter Plug the adapter in to a grounded outlet Connect the grounding wire and clamp to the metal stud on the adapter If the ground wire is not long enough to reach a grounded electrical outle...

Page 10: ...nductive surface such as paper or cardboard which interrupts grounding continuity Always ground a metal pail connect a ground wire to the pail Clamp one end to the pail and the other end to a true ear...

Page 11: ...nob all the way left counter clockwise to minimum pressure 7 When unpacking sprayer for the first time remove packaging materials from inlet strainer After long term storage check inlet strainer for c...

Page 12: ...r Remove and install battery into the sprayer as follows 1 Remove the used battery if in place 2 Install battery by aligning the battery pack with the rails inside the sprayer and sliding it in until...

Page 13: ...age the trigger lock 6 Put drain tube into a pail and place Prime Spray valve in PRIME position drain to relieve pressure 7 If you suspect the spray tip or hose is clogged or that pressure has not bee...

Page 14: ...of test material in the system It is important that you flush this material from the sprayer before using it for the first time See Cleaning Fluid Compatibility page 30 and Quick Reference page 31 fo...

Page 15: ...12 5 Press PushPrime button twice to loosen inlet ball 6 Align setting indicator with low setting on Pressure Control Knob 7 Turn ON OFF switch to ON position Power button is illuminated when ON 8 Inc...

Page 16: ...or flammable materials follow Grounding Instructions page 9 2 Press ON OFF switch to ON position Button is illuminated when power is ON 3 Wait to see paint coming out of the drain tube 4 Press ON OFF...

Page 17: ...ress ON OFF switch to ON posi tion Button is illuminated when power is ON 2 Trigger gun into waste pail until only paint comes out of the gun 3 Release trigger Engage trigger lock 4 Transfer drain tub...

Page 18: ...mbled in the order shown a Use spray tip to align gasket and seal in the tip guard b Spray tip must be pushed all the way into the tip guard Turn spray tip to push down c Turn the arrow shaped handle...

Page 19: ...ed spraying pressure can be lowered Spraying at a lower pressure results in less overspray and reduces spray tip wear Adjust the sprayer pressure to minimize overspray NOTE If spraying oil based or fl...

Page 20: ...urer s recommendations Maximum tip hole sizes supported by the sprayer GX21 0 021 in 0 53 mm Fine Finish Tips Fine Finish tips have an additional orifice that provides a finer atomization of the mater...

Page 21: ...d gun 12 in 30 cm from surface and aim straight at surface Tilting gun to direct spray angle causes an uneven finish Flex wrist to keep gun pointed straight Fanning gun to direct spray at angle causes...

Page 22: ...ial may need to be thinned If material needs to be thinned follow manufacturer s recommendations Clear Tip Clog In the event that particles or debris clog the spray tip this sprayer is designed with a...

Page 23: ...parate drain tube smaller from suc tion tube larger 6 Place empty waste and flushing fluid pails side by side 7 Place suction tube in flushing fluid See Cleaning Fluid Compatibility page 30 for approp...

Page 24: ...into paint pail c Disengage trigger lock d Pull and hold gun trigger e Place Prime Spray valve in SPRAY position f Press ON OFF switch to power ON Button is illuminated when ON g Continue to hold gun...

Page 25: ...the pail 5 Place suction and drain tube in waste pail 6 Turn Pressure Control knob to the Prime Clean setting lowest setting that the pump will run 7 Screw power flush attachment valve to garden hose...

Page 26: ...wer ON Power button is illuminated when ON g Continue to hold gun trigger until you see paint diluted with flushing fluid starting to come out of gun 16 While continuing to trigger gun quickly move gu...

Page 27: ...ater or flushing solvent and a soft brush a Install closed square end of InstaClean Fluid Filter C in sprayer b Screw outlet fitting B into sprayer 6 Tighten outlet fitting and reconnect hose A to spr...

Page 28: ...sprayer under pressure Store sprayer indoors 1 Perform Pressure Relief Procedure page 13 2 Place suction tube in Pump Armor fluid bottle and drain tube in waste pail 3 Place Prime Spray valve in PRIM...

Page 29: ...ips wear with use and need periodic replacement Tip hole size controls flow rate the amount of paint that comes out of the gun Fan Width Fan width is the size of the spray pattern which determines the...

Page 30: ...le materials flush the system thoroughly with water first The water flowing out of drain tube should be clear and sol vent free before you begin spraying the water based material To spray oil based or...

Page 31: ...batteries L Gun trigger lock page 9 Prevents accidental triggering of spray gun M Drain tube Drains fluid in system during priming and pressure relief N Fluid intake suction tube Draws fluid from pain...

Page 32: ...kit before your next job See Pump Assembly page 42 or con sult a Graco authorized retailer distrib utor or service center Pump Removal Always perform Pressure Relief Procedure page 13 and remove batte...

Page 33: ...is included in the frame to remove the inlet valve assembly from the pump If you suspect that the inlet valve is clogged or stuck remove the valve assembly and clean or replace 1 Remove suction tube o...

Page 34: ...he frame Pump Installation 1 Slide pump assembly onto the mounting pins 2 Move pump displacement rod up or down until cap is level with the opening in the yoke 3 Swing easy access door pump door close...

Page 35: ...Pressure control knob is set at zero pressure Turn pressure control knob clockwise to increase pressure setting Pump is seized Paint has hardened in pump or Water is frozen in pump Turn ON OFF switch...

Page 36: ...ased flushing fluid See page 14 Debris in paint Strain the paint See page 11 Thick or sticky paint Some fluids may prime faster if the ON OFF switch is momentarily turned off so the pump can slow and...

Page 37: ...an debris off inlet strainer and make sure suction tube is immersed in paint Battery has insufficient charge for tip support Charge battery or reduce tip size Inlet pump valve or outlet pump valve is...

Page 38: ...vent holes clear of obstructions and overspray and keep sprayer open to air Battery has insufficient charge Charge battery Motor needs to be replaced Take sprayer to Graco authorized retailer distrib...

Page 39: ...Notes 3A8429A 39 Notes...

Page 40: ...Cordless Airless Sprayer Parts Ref Torque Ref Torque Ref Torque 110 120 in lb 12 14 N m 35 45 in lb 4 0 5 0 N m 180 220 in lb 20 3 24 9 N m 30 35 in lb 3 5 4 0 N m 23 27 in lb 2 6 3 0 N m 8 10 in lb...

Page 41: ...drain 1 27 112798 SCREW thread 1 28 16D576 LABEL made in USA 1 30 247340 HOSE cpld 1 4 in x 50 ft 1 31 17J910 GUN spray 34 128795 SCREW hwh thread forming 4 41 17J444 STRAP carry not shown 1 42 17J277...

Page 42: ...sembly 42 3A8429A Pump Assembly Ref Torque Ref Torque 140 160 in lb 16 18 N m 220 250 in lb 25 28 N m 270 330 in lb 30 37 N m 320 380 in lb 36 43 N m 30 35 ft lb 40 48 N m 180 220 in lb 20 25 N m 1 4...

Page 43: ...10 15Y185 HANDLE valve drain 1 11 111600 PIN grooved Models 17H211 17H214 1 12 288747 KIT filter Not installed on all models 1 13 120776 PACKING O ring 1 14 24Y327 KIT repair outlet includes 12 13 1 1...

Page 44: ...Wiring Diagrams 44 3A8429A Wiring Diagrams...

Page 45: ...Noise Sound pressure 83 dBa Sound power 93 dBa Materials of Construction Wetted materials on all models stainless steel brass leather ultra high molecular weight polyethylene UHMWPE carbide nylon alu...

Page 46: ...California Proposition 65 46 3A8429A California Proposition 65 CALIFORNIA RESIDENTS WARNING Cancer and reproductive harm www P65warnings ca gov...

Page 47: ...s 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...

Page 48: ...polis International Offices Belgium China Japan Korea GRACO INC AND SUBSIDIARIES P O BOX 1441 MINNEAPOLIS MN 55440 1441 USA Copyright 2021 Graco Inc All Graco manufacturing locations are registered to...

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