Roberts 61–251 Owner's Manual
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Roberts 61–251 Owner's Manual

Roberts 61–251 Owner's Manual

Carpet adhesive sprayer
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CARPET ADHESIVE SPRAYER
1/4 Gallon Per Minute, 120 VAC, 60 Hz
3000 psi (210 bar) Maximum Working Pressure
MODEL 61–251
For use with non–flammable,
water–base adhesive
Part No. 231–109, Series C
Complete Sprayer with hose and gun.
U.S. Patent No. 4,616,982
U.K. Patent No. 2,165,591
Other Foreign Patents Pending
NOTE: This is an example of the DANGER label on your sprayer. This label
is available in other languages, free of charge. See page 15 to order.
Spray painting, flushing or cleaning equipment with flammable liq-
uids in confined areas can result in fire or explosion.
Use outdoors or in extremely well ventilated areas. Ground equip-
ment, hoses, containers and objects being sprayed.
Avoid all ignition sources such as static electricity from plastic
drop cloths, open flames such as pilot lights, hot objects such as
cigarettes, arcs from connecting or disconnecting power cords or
turning light switches on and off.
Failure to follow this warning can result in death or serious injury.
READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE
FIRE AND
EXPLOSION HAZARD
ROBERTS CONSOLIDATED INDUSTRIES,
INC.
P.O. BOX 1250/600 N. Baldwin Park Blvd.
City of Industry, California 91749
OWNER'S MANUAL
This manual contains important
warnings and information.
READ AND RETAIN FOR REFERENCE
Liquids can be injected into the body by high pressure airless
spray or leaks – especially hose leaks.
Keep body clear of the nozzle. Never stop leaks with any part of the
body. Drain all pressure before removing parts. Avoid accidental
triggering of gun by always setting safety latch when not spraying.
Never spray without a tip guard.
In case of accidental skin injection, seek immediate "Surgical
Treatment".
Failure to follow this warning can result in amputation or serious
injury.
308–021 Rev D
Supersedes C
SKIN INJECTION
HAZARD

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Summary of Contents for Roberts 61–251

  • Page 1 Failure to follow this warning can result in death or serious injury. Failure to follow this warning can result in amputation or serious injury. READ AND UNDERSTAND ALL LABELS AND INSTRUCTION MANUALS BEFORE USE ROBERTS CONSOLIDATED INDUSTRIES, INC. P.O. BOX 1250/600 N. Baldwin Park Blvd. City of Industry, California 91749...
  • Page 2 WARNINGS High Pressure Spray Can Cause Serious Injury. For Professional Use Only. Observe All Warnings. Read and understand all instruction manuals before operating equipment. FLUID INJECTION HAZARD General Safety Diffuser The gun diffuser breaks up spray and reduces the risk of fluid This equipment generates very high fluid pressure.
  • Page 3 EQUIPMENT MISUSE HAZARD General Safety maximum working pressure of any component or accessory used in the system. Misuse of the spray equipment or accessories, such as over pressurizing, modifying parts, using incompatible chemicals Fluid and Solvent Compatibility and fluids, or using worn or damaged parts, can cause them to All chemicals used in the sprayer are chemically compatible rupture and result in fluid injection, splashing in the eyes or the with the wetted parts shown in the Technical Data on the back...
  • Page 4 Setup 1. Prepare the adhesive. 1 inch This is probably the most important step (25 mm) toward trouble-free spraying! Prepare the adhesive according to the manufactur- er’s recommendations. Remove any skin that may have formed on the top of the coating. If neces- sary, thin the coating.
  • Page 5 Startup CAUTION 8. Whenever you stop spraying, always set the trigger safety lever to prevent accidentally triggering the The wallet sized warning card provided with the gun gun. should be kept with the operator at all times. The card contains important information on reducing the risk of a fluid injection injury , and treatment information 9.

  • Page 6: Maintenance

    Maintenance CAUTION Maintenance Intervals Thorough flushing and proper maintenance are Flushing Immediately after each use. essential to keep the sprayer working properly Lubricate the intake valve. Immediately after each use. and avoid costly damage to the sprayer or the ob - ject being sprayed.
  • Page 7 Check and/or Change the Hydraulic Oil 7. Using a clean pail of water or solvent, and the lowest See Fig. 7. possible pressure, flush again to be sure all adhesive particles are removed. 1. Follow the Pressure Relief Procedure on page 2. 8.

  • Page 8: Troubleshooting

    Troubleshooting WARNING NOTE: If your sprayer is not operating well, or will not op- erate at all, check for obvious problems first. Follow the To reduce the risk of serious injury, including fluid in- Startup procedure exactly (see page 5). Then if the jection, always follow the Pressure Relief Proce- sprayer won’t start, use the T roubleshooting Chart for dure Warning on page 2 before checking or repair-...
  • Page 9 PROBLEM CAUSE SOLUTION Sprayer starts but will not suck fluid. Fluid supply empty. Refill and prime pump. Inlet screen clogged Clean. Inlet valve stuck or damaged See page 18. Outlet valve stuck See page 18. Air trapped in hydraulic system See page 18, Diaphragm, step 9.
  • Page 10 Service Repairs, other than those for which instructions are given 7. The last coil on one end of the spring is turned in. below, should be performed by a trained and qualified re- Place this end over the stud in the plug (28d). Install pair agency.
  • Page 11 Service 7. Lubricate the screws (25) and then install and torque 8. Check the hydraulic oil level and add Graco-ap- them to 170–200 in–lb (19–23 N.m). proved oil as necessary until the level is 1 inch (25 mm) from the top of the plate. See Fig. 11. 9.
  • Page 12 Parts Lubricate the threads. Torque to 40–45 in–lb (54–60 N.m). Torque to 130–140 in–lb (15–16 N.m). PTFE Apply tape to the top and bottom threads. See Detail A, page 14. Torque to 70–90 in–lb (8–10 N.m). The tube must drop freely in the pipe (1). Apply sealant to the threads.
  • Page 13 Parts MODEL 61–251 Part No. 231–109, Series C NOTE: Part numbers and drawings for items 10 to12, 15, 18a, 20 to 26, 28, 68, 93, 94, 96, 99 to103 are shown on page 22. Ref. Ref. Part No. Description Qty. Part No.
  • Page 14 Parts Ref. Part No. Description Qty. DETAIL A 105–659 TOGGLE BOOT 105–679 SWITCH, toggle 105–774 PLATE, switch, ON/OFF 106–013 STRAIN RELIEF BUSHING 110–900 .STARTER SWITCH 180–406 HOUSING, diaphragm 218–727 DIAPHRAGM ASSEMBLY 224–624 PUMP HOUSING KIT Includes 22a, 22b 187–185 GUIDE, diaphragm 187–339 HOUSING, pump 109–042...

  • Page 15: Manual Change Summary

    Manual Danger Labels The English language DANGER label shown on Change Summary page 1 and a French version of the same label, are on your sprayer. If you have operators who do not read English or French, order one of the following labels to apply to your sprayer.

  • Page 16: Technical Data

    Graco (such as electric motor, 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. ROBERTS CONSOLIDATED INDUSTRIES, INC. P.O. Box 1250 / 600 N. Baldwin Park Blvd.

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