Graco Pneumatic PR70 Instructions Manual
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Graco Pneumatic PR70 Instructions Manual

Graco Pneumatic PR70 Instructions Manual

For accurate metering, mixing, and dispensing of two-component materials
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Instructions
Pneumatic PR70
For accurate metering, mixing, and dispensing of two-component materials.
SN8050
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in all sup-
plied manuals. Save these instructions.
313937A
Dispense Valve not shown

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  • Page 1 Instructions Pneumatic PR70 313937A For accurate metering, mixing, and dispensing of two-component materials. SN8050 3000 psi (21 MPa, 207 bar) Maximum Working Pressure 100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure Important Safety Instructions Read all warnings and instructions in all sup- plied manuals.

  • Page 2: Table Of Contents

    Pressure Relief Graco Ohio Information ..... 34 Procedure ......16 Shutdown .

  • Page 3: Warnings

    Warnings Warnings For complete warnings, see supplied manuals. See Related Manuals on page 2. The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings.
  • Page 4 Warnings WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and explosion: • Use equipment only in well ventilated area. • Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop cloths (potential static arc).

  • Page 5: Component Identification

    Component Identification Component Identification Key: 101 Tanks 102 System Air Pressure Regulator 103 System Air Pressure Relief Switch 104 Water Separator 105 Air Inlet 106 Shield Locking Screws 107 Machine Shield 108 Agitator 109 Tank Stand 110 Footswitch 313937A...

  • Page 6: Grounding

    Grounding Grounding To maintain grounding continuity when flushing or relieving pressure: hold metal part of the spray gun/dispense valve firmly to the side of a grounded metal pail, then trigger the gun/valve. The equipment must be grounded. Grounding reduces the risk of static and electric shock by providing an escape wire for the electrical current due to static build up or in the event of a short circuit.
  • Page 7 Grounding Ground Each Tank to Base Use Conductive Hoses to Ground Dispense Valve Ground Footswitch to Base . 2: Grounding Illustration 313937A...

  • Page 8: Installation

    Installation Installation Connect Pressurized Air Input 5. Connect a compressed airline to the air inlet (109) in the back of the machine. Avoid contact with electrical inter-connects when connecting electric power to the machine. Avoid con- tact with Krytox on the pump shaft, PE tank lid, and PE tank lid gasket.

  • Page 9: Initial Startup

    Initial Startup Initial Startup Due to packing convenience, some on-site reas- sembly may be required. 1. Go through the Pre-Operation Checklist in the fol- or 3 cfm at 80 psi for the machine to cycle 30 times lowing table. per minute. ✔...

  • Page 10: Startup

    Startup Startup See startup instructions and related warnings in sup- plied manuals. See Related Manuals on page 2. 1. Go through the Pre-Operation Checklist in the fol- lowing table. ✔ Checklist System Grounded Verify all grounding connections were made. See Grounding, page 6.

  • Page 11: Setup

    Setup Setup Adjusting the Shot Size Adjust the Dispense Valve Switch The RETRACT proximity switch enables the machine logic to retract the air cylinder and pumps when tripped. 1. Reduce air pressure to 0 psi. Follow these instructions to adjust the position of this switch for your desired shot size.

  • Page 12: Dry Run

    Setup Dry Run 14. Set Pump Mode to CONT then press and release the start device. Machine will cycle continuously. 15. Set Pump Mode to RETRACT. Machine will stop in retracted position. If the machine is in the middle of a cycle, it will A dry run demonstrates the machine’s controls and dis- retract immediately without completing the cycle.

  • Page 13: Phasing Adjustment

    Setup This ensures any air in the hoses will travel to the Prepare Machine dispense head. 1. Place a waste container under the dispense valve to catch dispensed material. 7. Set the Stroke Adjust switch to the 2 in. mark. 2.

  • Page 14: Adjust Dispense Valve Snuff Back

    Setup Adjust Phasing • If the B side material exits the dispense nozzle before the A side material ( a. Use two 13 mm wrenches to break loose the locking nut (302) from the phase adjust- ment screw (303) on the A material side. Hold the phase adjustment screw (303) sta- tionary with a 13 mm wrench.

  • Page 15: Ratio Check

    Setup It is most efficient to adjust the snuff back while material is dispensing but it can also be adjusted when there is no air pressure in the system. 1. If a static mixer is not in place, install one then prime the machine.

  • Page 16: Pressure Relief Procedure

    Pressure Relief Procedure Pressure Relief Shutdown Procedure If the machine is to remain idle for an extended period of time, perform the following steps. 1. Place a waste container below the dispense valve. 1. Place a waste container below the dispense valve. 2.

  • Page 17: Maintenance

    Maintenance Maintenance Schedule Action Schedule Procedure Check Water/Air Separator Daily before use 1. Check water/air separator for water. 2. Open valve at base of water/air separator to purge water. Check Tanks Daily before use 1. Check material levels and refill as necessary. 2.

  • Page 18: Troubleshooting

    Troubleshooting Troubleshooting Problem Cause Solution Pumping (after satisfactory startup) Pump stalling and no material being Blocked mixer. Turn oil-air supply and remove hoses pumped despite adequate input from mixer. Check hoses for flow. pressure Closed outlet ball valves. Open ball valves. Blocked check valve.
  • Page 19 Troubleshooting Problem Cause Solution Logic Circuit Pumps remain in forward position Proximity switch not sensing the trip If proximity switch is working prop- and will not return plate. Switch roller position may erly, the lamp will illuminate. need adjusting. Proximity switch faulty. If lamp does not work, adjust the proximity switch by loosening the mount screws and adjust to 0.062 in.

  • Page 20: Repair

    Repair Repair HydraCheck Kit Installation 100d 100b ti12436a . 6: HydraCheck Installation - Fixed Ratio Base Install HydraCheck Shock See Kits on page 29 for kit numbers. Prepare Machine for Kit Installation Be sure that system pressure is relieved and dis- 1.
  • Page 21 Repair Install Adjustment Screw/Cap 8. Loosely install hex nut (100b) and adjustment cap (100d) onto the air cylinder shaft (420). Adjust the Adjustment Screw/Cap 9. Push the drive block forward until resistance is felt when it engages the cylinder. Make sure the resis- tance is not due to shock absorber contact with the adjustment screw or adjustment cap (100d).

  • Page 22: Air Cylinder Kit Installation

    Repair Air Cylinder Kit Installation ti12490a Torque to 41 in-lb (4.6 N•m). Torque to 350 in-lb (39.5 N•m). Torque to 100 ft-lb (135 N•m). Coat all sliding surfaces with lubricant, part 115982. Apply sealant tape to npt fittings. Disassemble the Air Cylinder See Kits on page 29 for kit numbers.
  • Page 23 Repair 10. Partially remove the air cylinder by pulling on the 26. Install the three screws (402) that attach the sole- cylinder from the back of the machine until the air noid valves (407, 408) to the blind end block (418). lines at the elbow fittings can be seen.

  • Page 24: Rear Pump Rebuild Kit Installation

    Repair Rear Pump Rebuild Kit Installation See Kits on page 29 for kit numbers. The pump shaft is installed with Krytox. Contact with Krytox can lead to flu-like symptoms. The MSDS for this material is available upon request. ti12491a Torque to 350 in-lb (39.5 N•m). Lube shaft with krytox grease prior to insertion into bearing.
  • Page 25 Repair Disassemble the Rear Pump Assembly Assemble the Rear Pump Assembly 7. Disconnect the pump shaft (511) from the drive 15. Install the new rebuild kit components into the bear- block. ing housing. a. Loosen the shaft locking nut (502). CAUTION Be careful when installing the seal (503).

  • Page 26: Piston/Cylinder Replacement Kit Installation

    Repair Piston/Cylinder Replacement Kit 10. Clean the washers. Installation Install Cylinder 11. Install the new piston and any front or rear washers. See Kits on page 29 for kit numbers. 12. Install the piston screw (605). Tighten the piston screw until the piston stops rotat- ing, then turn the screw an additional 1/4 turn.

  • Page 27: Check Valve Rebuild Kit Installation

    Repair Check Valve Rebuild Kit 9. Place the new check valve ball guide (2103) on a bench with the open end up. Install the check valve Installation spring (2102) into the guide. 10. Install the check valve ball (2101) on top of the See HydraCheck Kit Installation on page 20 and spring (2101).

  • Page 28: Piston Plug Installation

    Repair Piston Plug Installation 1802 1801 ti12562a 1. Drain the pump. • If ball valves are installed, close the ball valves then take several shots. • If ball valves are not installed, empty the tanks. Perform shots repeatedly until no mate- rial comes out of the dispense valve.

  • Page 29: Kits

    Kits Kits Mixer and Shroud Options Machine Rebuild Kits Part Description See the PR70 and PR70v Repair - Parts manual LC0063 Mixer, 3/16 in. (6.5 mm) x 32, 10 Mixers referenced at the beginning of this manual for parts with shroud included in each kit.
  • Page 30 Kits Vacuum Kits External Control Interface Connection Kit These vacuum kits contain the parts necessary to Part Description attach a vacuum pump to the tanks. LC0008 Cord, I/O interface and splitter On-Board Off-Board Vacuum Kits Vacuum Kits ti12589a ti12588a Assembly 256206 Assembly 256207 Shown Shown...

  • Page 31: Dimensions

    Dimensions Dimensions PR70v with ADM and Accumulator shown. ti12623a ti12624a PR70 † Assembly Dimensions, in. (mm) 30 L Tank 60 L Tank No Agitators With Agitators No Agitators With Agitators 75.7 (1923) 73.9 (1877) 64.9 (1648) 84.7 (2151) 32.1 (815) 32.1 (815) 32.1 (815) 32.1 (815)
  • Page 32 Dimensions 313937A...

  • Page 33: Technical Data

    Technical Data Technical Data Metering Pump Effective Area ..... 80 to 960 mm (0.124 to 1.49 in. ) per side Small Air Cylinder Effective Area .

  • Page 34: Graco Ohio 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.

This manual is also suitable for:

Sn8050

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