Graco 312753E User Manual

EN312753EOperation - Maintenance L-HeadFor dispensing controlled ratio shots of resin and isocyanate.3000 psi (20.6 MPa, 206 bar) Maximum Working Pres

Maintenance 10 312753E Nozzle Grip Assembly Removal and Cleaning The nozzle grip assembly must be removed, disassem-bled and cleaned whenever disconne

Maintenance312753E 114. Using a clockwise twisting motion, pull the entire nozzle grip assembly out of the MixHead body. 5. If the injection nozzle w

Maintenance 12 312753E Cleanout Plunger ProximitySwitch Replacement The proximity switch on the cleanout plunger is a high-pressure switch that exten

Maintenance312753E 13Proximity Switch Replacement 1. Turn OFF the hydraulic fluid motor, bleed the hydraulic pressure to zero and allow the fluid to

Maintenance 14 312753E Material Plunger ProximitySwitch Replacement Tools Required• M2.5 hex key for M4 flat head screws• Metric wrench (13mm)• Proxi

Maintenance312753E 15c. While holding the conduit (DB) stationary, tighten the adapter (DC) by hand until it con-tacts the jam nut (DD).d. Remove th

Maintenance 16 312753E Key:DA Proximity SwitchDB ConduitDC AdapterDD 8 mm Jam NutDE Lock-washerDF Material PlungerDG Sensor Gauge MU1140DH Sensor Cap

Maintenance312753E 17Cleanout Plunger Stroke AdjustmentThe cleanout plunger stroke is properly set during fac-tory assembly so that the cleanout plun

Maintenance 18 312753E 4. Place the steel rod between the two tie rods on top of the adjusting plug and carefully turn the adjusting plug clockwise to

Maintenance312753E 19Pour Nozzle MaintenanceWith proper maintenance, the L-Head is capable of per-forming thousands of pours without the need for rem

Models 2 312753E ContentsModels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Warnings . . . . . . . . . . . . . . . . .

Maintenance 20 312753E Pour Nozzle Removal and InstallationTools Required• Torque wrench with M6 and M8 sockets• Fine-grade wire brushes on air tool1.

Troubleshooting312753E 21Troubleshooting Any individual working with the equipment must be knowledgeable in the necessary safety procedures.Unless o

Troubleshooting 22 312753E Hydraulic leak around Cleanout Plunger Proximity SwitchDamaged o-ring Replace o-ring See page 12Proximity Switch not tight-

Troubleshooting312753E 23

Parts 24 312753E PartsModels 5/8, 6/10, 10/14123456789101112131415161817

Parts312753E 25Parts List * Part included in Nozzle Grip Assembly Seal Kit MK1490, which can be purchased separately.† Part included in Orifice Kits

Parts 26 312753E Models 13/20 and 16/25 101102103104105106107108109110111112113114115116118117

Parts312753E 27Parts List * Parts included in Nozzle Grip Assembly Seal Kit MK1490, which can be purchased separately.† Part included in Orifice Kit

Parts 28 312753E Orifice Kits Kit NumbersOrifice SelectionTo help choose the correct orifice for your application, use the following equation to find

Parts312753E 29Additional Tools and Accessories * Included in L-Head Tool Kit MK1184 for models 5/8, 6/10, and 10/14. Kit can be purchased separatel

Warnings312753E 3WarningsThe following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-tion point

Parts 30 312753E

Technical Data312753E 31Technical DataProximity Switch Electrical Requirements . . . . Cleanout Piston: 50 mA @24VDCMaterial Piston: 60 mA @ 16 VDC

All written and visual data contained in this document reflects the latest product information available at the time of publication. Graco reserves th

Warnings 4 312753E EQUIPMENT MISUSE HAZARDMisuse can cause death or serious injury.• Do not operate the unit when fatigued or under the influence of d

Isocyanate Hazard312753E 5Isocyanate HazardMaterial Self-ignitionMoisture Sensitivity of IsocyanatesIsocyanates (ISO) are catalysts used in two compo

Component Identification 6 312753E Component IdentificationKey:AEye BoltB Cleanout Plunger Open FittingC Resin Close FittingD Resin Open FittingE Resi

Installation312753E 7InstallationHydraulic & Chemical Hose InstallationBefore Disconnecting Hydraulic Fitting or Proximity Switch• Turn off the h

Installation 8 312753E 5. Manually cycle the material plunger back and forth to check for proper operation. Check for hydraulic leaks and retighten fi

Maintenance312753E 9Maintenance Maintenance Schedule All maintenance must be done with pressure relieved and the power switched off and locked out,