Graco 278860 Page 42 Operation, Repair, And Parts Download

Page: 42 / 46

Tubing Schematic

3A4802D

Tubing Schematic Key

★

T16 not shown - routes from the Garden Hose Connection to the Fill/Flush Valve outside of the control box.

Ref.

Tubing Style

Cut Length Inches (cm)

Natural - 1/4 in. OD

14 in. (35.5 cm)

Green - 1/4 in. OD

17 in. (43.1 cm)

Green - 1/4 in. OD

9 in. (22.8 cm)

Green - 1/4 in. OD

13 in. (33 cm)

Green - 1/4 in. OD

10 in. (25.4 cm)

Red - 1/4 in. OD

8.5 in. (21.5 cm)

Orange - 1/4 in. OD

15 in. (38 cm)

Yellow - 1/4 in. OD

27 in. (68.5 cm)

Natural - 1/4 in. OD

16 in. (40.6 cm)

T10

Natural - 1/4 in. OD

33.5 in. (85 cm)

T11

Red - 3/8 in. OD

13.5 in. (34.2 cm)

T12

Red - 1/4 in. OD

7 in. (17.7 cm)

T13

Green - 1/4 in. OD

9 in. (22.8 cm)

T14

Green - 1/4 in. OD

11.5 in. (29.2 cm)

T15

Blue - 1/4 in. OD

24 in. (60.9 cm)

T16

★

Clear - 3/8 in. OD

16 in. (40.6 cm)

Summary of Contents for 278860

Page 1: ... system for coating removal and surface preparation For professional use only See page 2 for model information and approvals Maximum Working Pressure 150 psi 1 03 MPa 10 3 bar Important Safety Instructions Read all warnings and instructions in this and all related manuals Save these instructions WL D ...

Page 2: ...in Media Path 29 Notes 31 Parts 32 EQp Parts 32 EQp Parts List 33 EQp Parts continued 34 Enclosure Parts 35 Enclosure Parts continued 37 Kits and Accessories 39 Blast Hoses with Control Hose 39 Blast Hoses without Control Hose 39 Blast Control Hoses 39 Nozzles 39 Spare Parts 40 Accessories 40 Tubing Schematic 41 Tubing Schematic Key 42 Dimensions 43 Notes 44 Technical Specifications 45 Graco Stand...

Page 3: ...y harmful dust or toxic substances from the abrasive being used the coatings being removed and the base object being blasted For use only by sophisticated users familiar with applicable governmental safety and industrial hygiene regulations Use equipment only in a well ventilated area Wear a properly fit tested and government approved respirator suitable for the dust conditions Follow local ordina...

Page 4: ...ure Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use Check equipment daily Repair or replace worn or damaged parts immediately with genuine man ufacturer s replacement parts only Do not alter or modify equipment Alterations or modifications may void agency approvals and cre ate safety hazards Make sure all equipment is rated and approved for the environm...

Page 5: ...er sources PERSONAL PROTECTIVE EQUIPMENT Wear appropriate protective equipment when in the work area to help prevent serious injury includ ing eye injury hearing loss inhalation of toxic fumes and burns Protective equipment includes but is not limited to Protective eyewear and hearing protection Protective clothing shoes and gloves Properly fit tested and government approved respirator suitable fo...

Page 6: ... Valve P Control Box Q Air Supply Valve R Blast Pressure Regulator T Abrasive Metering Valve V Blast Pressure Gauge W Selector Valve Y Air Supply Connection Z Blast Hose Connection ZA Pneumatic Control Connection ZC Supply Pressure Gauge ZF Abrasive Material ZG Pot Outlet Manifold ZH Ground Wire and clamp ZJ Pop up Seal XA Water Inlet Pressure Regulator XB Abrasive Hose XC Pump Inlet Hose XD Fill ...

Page 7: ...ined blast hose length to ensure grounding continuity Check the electrical resistance of the blast hoses If the total resis tance to ground exceeds 29 megaohms replace the blast hose immediately Air compressor Follow the manufacturer s recommendations Follow the Pressure Relief Procedure whenever you see this symbol This equipment stays pressurized until pressure is manually relieved To help preve...

Page 8: ...lasting 50 ft 15 m straight up use at least 10 ft 3 m of blast hose on the ground before the blast hose goes up to the blasting height WL D NOTICE When blasting on a surface higher than the equipment make sure that there is a length of blast hose on the ground equal to 10 20 of the height The hose on the ground prevents unspent abrasive in the hose from backing up into the internal plumbing of the...

Page 9: ...rized water supply NOTE To prime the pump turn the selector valve to BLAST Using a Siphon Hose 1 Close the fill flush valve XD 2 Disconnect the pump inlet hose at the pump inlet 3 Connect the included siphon hose to the pump inlet to draw from a 5 gallon bucket or an open container Using the Water Tank Kit 1 Disconnect the pump inlet hose at the pump inlet 2 Connect the pump inlet adapter fitting ...

Page 10: ...l debris is cleared from the hose 3 Connect an appropriately sized air supply hose to the air inlet and install the hose restraints and cou pler pins see Technical Specifications page 45 WL E OFF RUN START WL D NOTICE Damage to the tubing connections on the blast control can occur if the blast circuit is allowed to rotate To avoid damage use a wrench to hold the blast circuit inside the enclosure ...

Page 11: ... air supply meets the appro priate air flow requirements see Technical Specifications page 45 5 Connect the blast hose hose restraints control hoses and coupler pins WL D NOTICE Do not use a wrench when installing the nozzle Dam age to the seal could occur To avoid seal damage always hand tighten the nozzle WL D ...

Page 12: ...urized water supply turn the selector valve to BLAST to prime the pump NOTE The system will not work unless the air sup ply valve is open 5 Close the pot dump valve 6 Fill the pot with water Use the fill flush valve or an external source 7 Open the pot dump valve J 8 Add abrasive material see Technical Specifica tions page 45 for capacity information WL D XG WL D M ti30725a WL D Q WL D J WL D ...

Page 13: ...d NOTE You may have to wait 1 2 minutes for the abrasive material to reach the nozzle NOTE Use a piece of test material similar to what you will be blasting Always start as gently as possi ble and then increase the blast force as necessary to clean without doing any damage to the substrate Setting the Abrasive Metering Valve The abrasive metering valve should be opened in incre ments of 1 4 turn u...

Page 14: ...low air flow consumption and detail work 5 Largest pattern with 0 5 in 12 7 mm blast hose 1 0 in 25 4 mm A 185 CFM 5 24 m 3 min compressor or larger is available Large surfaces need to be cleaned 100 feet 30 m or 150 feet 45 m of blast hose needs to be used 5 General application nozzle allowing increased nozzle pressure with a 185 CFM 5 24 m 3 min compressor 6 Blasting steel or concrete with an ea...

Page 15: ...5 bar 0 35 MPa 108 3 1 139 3 9 159 4 5 60psi 4 1 bar 0 41 MPa 124 3 5 152 4 3 183 5 2 70psi 4 8 bar 0 48 MPa 104 2 9 139 3 9 169 4 8 209 5 9 80psi 5 5 bar 0 55 MPa 122 3 5 153 4 3 190 5 4 236 6 7 90psi 6 2 bar 0 62 MPa 142 4 0 166 4 7 213 6 0 262 7 4 100psi 6 9 bar 0 69 MPa 148 4 2 180 5 1 232 6 6 296 8 4 110psi 7 6 bar 0 76 MPa 157 4 4 198 5 6 253 7 2 120psi 8 3 bar 0 83 MPa 166 4 7 215 6 1 130ps...

Page 16: ...urn the selector valve to WASH 3 Blast 1 2 minutes until the abrasive is cleared from the hose 4 The equipment is now ready to wash any previously blasted surfaces NOTICE There will always be some residual abrasive in the blast hose Never use the wash feature on any surface other than where you have blasted or intend to blast It can affect dull the surface WL D M ti30732a WL D ...

Page 17: ...e see Technical Specifications page 45 for capacity information and continue to step 7 from Setting Up the Equipment page 12 Shutting Down 1 When you have finished blasting perform wash until all of the abrasive is flushed from the blast hose see Using the Wash Feature page 16 2 Turn the selector valve to OFF and with the abra sive ball valve closed continue to blast until all water is cleared fro...

Page 18: ...ot pressure gauge reads 0 psi 5 Close the abrasive ball valve M 6 Disconnect the abrasive ball valve cam lock by removing the coupler pins and pulling the rings out and up to pull the two cams away from the groove NOTE Be prepared to capture the water that will be drained from the pot All disposals must comply with national state and local regulations 7 Open the fill flush valve XD Once water is a...

Page 19: ...e and pull up on the pop up handle once water is above the pop up seal to re pressurized the pot Repeat until all abrasive has been emptied from the pot 9 Close the fill flush valve 10 Open the abrasive ball valve and drain the pot of water 11 Connect the abrasive hose NOTE The system must be winterized if it will be exposed to temperatures below freezing see Winterizing the Equipment page 21 WL D...

Page 20: ...l state and local regulations 5 Turn the selector valve to BLAST and when water is above the pop up seal pull up on the pop up handle to pressurize the pot NOTE The abrasive metering valve must be open for water to flow to the pot 6 Place a bucket under the abrasive hose Slowly open and close the abrasive ball valve to flush abra sive material from the pot Repeat several times Once no abrasive mat...

Page 21: ...ctor valve to BLAST with the abrasive metering valve 1 4 turn open until the blast water tubing is full of windshield wash 8 Turn the selector valve to WASH Confirm that the wash tubing fills with windshield wash 9 Close the air supply valve 10 Remove fill flush line from the water supply manifold and drain water Reconnect the fill flush line 11 Open all ball valves and the abrasive metering valve...

Page 22: ...tion is connected and pressurized Check that the water supply meets appropriate pressure and flow requirements see Setting Up the Equipment on page 12 step 1 Make sure all fitting connections are tight Check inlet water pressure regulator for proper flow direction installation see Parts on page 32 Check the inlet water pressure regulator screen filter for debris clean if possible Replace regulator...

Page 23: ...he pot pressurized and the abrasive ball valve open check to make sure the pump is stalled If the pump rod is cycling replace the pinch hose see Replacing the Pinch Hose page 28 The fill flush valve is open Close the fill flush valve The pot pressure relief valve K is discharging water The water pressure regulator is mal functioning Adjust the water pressure regulator to 185 psi 12 75 bar 1 275 MP...

Page 24: ...r compressor manual see Related Manuals on page 2 The pneumatic blast control circuit is malfunctioning Actuate the blast control switch B and check for proper spool valve actuation in the 4 way solenoid valve If no actuation occurs check the blast control switch and twin line by disconnecting the yellow tube at the enclosure male quick disconnect and engage the control switch If no air comes from...

Page 25: ...from the orange tubing confirm that the tubing is cor rectly routed If the pinch valve does not open replace it If the pinch valve opens and there is no source air coming from the tub ing inspect the mufflers on the 4 way valve for debris If debris is not present clean or replace the 4 way valve Obstruction in blast outlet circuit Follow Debris in Media Path on page 29 to check for obstruction The...

Page 26: ...tch If the switch is functioning make sure the yellow tubing inside the control box is properly con nected and clear any obstructions If all above items are functional replace the 4 way solenoid valve While the blast control switch B is engaged the blast air flow is fluctuating The supply air pressure is fluctuating Make sure the compressor meets minimum flow requirements and is operating properly...

Page 27: ...uildup or damage Replace if neces sary There is an obstruction inside the pot or inside the abrasive hose between the pot and the enclosure Follow Debris in Media Path on page 29 to check for obstruction The fill flush valve is open Close the fill flush valve Too much dust occurs during blasting There is not enough water in abra sive mixture The media is too fine use a coarser media The blast pres...

Page 28: ...Move the blast inlet assembly BI to the left to allow room to remove the blast circuit 6 Remove check valve components G1 G2 G3 G4 7 Remove the bottom hose clamp C2 8 Pull the pinch hose PH out of the box NOTE use the blast circuit BC as a handle and twist while pulling 9 Loosen the remaining hose clamp and remove the pinch hose from the circuit Installing the Pinch Hose 1 Place both hose clamps C...

Page 29: ...cked out media is found remove then reinstall the blast hose and abrasive hose and resume blasting 4 Remove the pot funnel assembly to gain access to the inside of the pot 5 If visible remove large debris and proceed to step 11 If water and media still remain in the pot and no debris is visible proceed to step 6 6 Remove the abrasive hose from the control box and pot at the cam lock fittings If me...

Page 30: ...n debris is cleared media should freely flow from the pot outlet The pot will need to be com pletely flushed before the outlet manifold can be reinstalled All disposals must comply with national state and local regulations 10 Connect the abrasive hose at the cam lock connec tions 11 Inspect the post funnel assembly gaskets and replace if necessary Reinstall the pot funnel assembly and torque to 70...

Page 31: ...Notes 3A4802D 31 Notes ...

Page 32: ...Parts 32 3A4802D Parts EQp Parts WL D 55 54 1 3 Torque clamp to 15 2 ft lb after hose is connected Apply anti sieze to studs ...

Page 33: ...8 LABEL Made in the USA 1 29 206994 FLUID TSL 8 oz bottle 1 30 17L329 HOSE inlet media 1 31 17R833 VALVE ball 2pc sst 1 in npt 1 32 17J329 COUPLER cam lock sst 1 nptf 1 33 117559 O RING 1 34 15E813 NUT jam 1 35 24F148 KIT hose suction 5 gal 3 8 od 1 37 113218 VALVE ball vented 750 1 38 113430 COUPLING universal 1 39 17R845 FITTING claw coupler 1 1 4 nps 1 40 128638 FITTNG PTC straight 3 8 npt 3 8 ...

Page 34: ...OLD dump 1 9 17L622 VALVE safety relief 220 psi 1 10 127852 FITTING elbow swivel push to connect 1 11 17L320 GAUGE pressure fluid includes 29 1 12 129903 VALVE ball 2pc sst 3 4 in npt 1 13 EQ1012 FITTING nipple barb hose 3 4 in 1 17 121018 FITTING elbow male swivel 1 4 npt 1 18 17R837 O RING 3 in ID 5 in cross section 1 19 104280 PACKING o ring 1 20 17R838 FUNNEL pressure pot includes 19 1 21 17R8...

Page 35: ...Parts 3A4802D 35 Enclosure Parts WL D 1 Apply anti sieze to threads ...

Page 36: ...OLT flange hd serrated m5 sst 2 37 128718 CAP vinyl 1 4 5 16 2 39 17K052 VALVE pinch includes 41 52 57 1 41 128787 BOLT button hd 3 8 16 x 3 4 ss 2 42 128791 CLAMP triclamp 1 5 hex wing nut 1 44 129080 GROMMET 1 55 64 in id rubber black 1 45 120444 SCREW hex hd flanged 4 48 129561 FITTING PTC straight 1 4 MPT 1 4 t 2 51 129565 FITTING PTC elbow 1 8 MPT 1 4 t 1 52 129566 FITTING PTC elbow 1 4mpt 1 ...

Page 37: ...Parts 3A4802D 37 Enclosure Parts continued WL D ...

Page 38: ...LER 1 4 npt 2 28 123390 FITTING fitting 1 4 npt brs 2 29 127908 NUT flange serrated 10 32 ss 4 31 17K055 VALVE selector 3 way 3 8 npt br 1 32 LABEL operations 1 33 17L322 KIT regulator pump pressure 1 36 128672 NUT serrated flange 6 32 sst 2 38 17K056 KIT valve needle 1 40 17M852 KIT valve pilot 4 way pneu 1 43 17S069 GAUGE pressure 1 5 in 160 psi includes 32 1 48 129561 FITTING PTC straight 1 4 m...

Page 39: ...lder brass 2 prong coupler brass 50 ft 15 m Yes 17L475 2 prong coupler brass 24Z780 0 5 in Nozzle holder aluminum 2 prong coupler aluminum 24Z781 2 prong coupler aluminum Part Description 24X746 Blast control hose pneumatic twinline 55 ft 24X744 Blast control hose pneumatic twinline 55 ft extension Part Description Length Thread Size 17R023 Nozzle 3 long 3 5 in 3 4 npsm 17R024 Nozzle 4 long 4 7 in...

Page 40: ... pack 187873 Gauge pot pressure 17L622 Valve safety relief Part Description 17D786 Hose restraint whip check 17D787 Blast hose coupler pin kit 6 pack 17C124 Grommet hose coupler 17L309 Gasket abrasive hose cam lock 10 pack 17R834 KIT pump lower sst 17R835 KIT repair pump lower 17R840 KIT pinch hose EQp 17R847 KIT air filter 3 4 npt Part Description 17L119 Kit nozzle gasket pack of 5 50 mm contract...

Page 41: ...Tubing Schematic 3A4802D 41 Tubing Schematic WL D T15 T14 T13 T12 T11 T10 T8 T6 T5 T4 T7 T9 T17 T1 33 5 16 8 5 13 T2 T3 9 14 17 13 15 10 13 5 7 11 5 27 24 9 ...

Page 42: ... Green 1 4 in OD 9 in 22 8 cm T4 Green 1 4 in OD 13 in 33 cm T5 Green 1 4 in OD 10 in 25 4 cm T6 Red 1 4 in OD 8 5 in 21 5 cm T7 Orange 1 4 in OD 15 in 38 cm T8 Yellow 1 4 in OD 27 in 68 5 cm T9 Natural 1 4 in OD 16 in 40 6 cm T10 Natural 1 4 in OD 33 5 in 85 cm T11 Red 3 8 in OD 13 5 in 34 2 cm T12 Red 1 4 in OD 7 in 17 7 cm T13 Green 1 4 in OD 9 in 22 8 cm T14 Green 1 4 in OD 11 5 in 29 2 cm T15...

Page 43: ...Dimensions 3A4802D 43 Dimensions WL D PP PP PP ...

Page 44: ...Notes 44 3A4802D Notes ...

Page 45: ...e capacity and wet weight using 80 grit garnet A 3 4 in male NPT connects to the universal claw out of the system A 1 25 in NPSM connects to the 2 lug claw coupler out of the system Siphon kit is included adapter kit or water tank kit are available as accessories Air Supply Hose Minimum ID Less than 185 CFM compressor and 100 ft of hose 1 in ID 25 4 mm ID Greater than 185 CFM compressor or 100 ft ...

Page 46: ... 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 warra...

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