The Graco Electrostatic Air Spray Gun L85T12 is a high-performance spray gun designed for efficient and precise application of coatings. Ideal for industrial use, this model features advanced electrostatic technology, ensuring superior finish quality and reduced overspray. Optimize your painting process with the reliability of Graco's innovative engineering.

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Manual for Graco Electrostatic Air Spray Gun L85T12

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Daily Electrical System Inspection
Replace Roller and Pulley
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Graco Electrostatic Air Spray Gun L85T12

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Maintenance Plans for Graco Electrostatic Air Spray Gun Model L85T12

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1 Daily Air Spray Gun Maintenance

Check gun resistance

Check hose resistance

Check electrical grounding

Check hoses, tubes, and couplings

Check equipment

To reduce the risk of an injury, follow the Pressure Relief Procedure, page 37, whenever you are instructed to relieve the pressure.

Flush the gun

Clean the fluid and air line filters

Clean the outside of the gun

Run this procedure

Electrical Testing

Electrical components inside the gun affect performance and safety. Use the following procedures to test the condition of the power supply and gun body, and electrical continuity between components.

Use megohmmeter Part No. 241079 (AA) and an applied voltage of 500 V. Connect the leads as shown.

⚠️⚠️⚡️ Megohmmeter Part No. 241079 (AA – see Fig. 17) is not approved for use in a hazardous location. To reduce the risk of sparking, do not use the megohmmeter to check electrical grounding unless:

• The gun has been removed from the hazardous location;

• Or all spraying devices in the hazardous location are turned off, ventilation fans in the hazardous location are operating, and there are no flammable vapors in the area (such as open solvent containers or fumes from spraying).

Failure to follow this warning could cause fire, explosion, and electric shock and result in serious injury and property damage.

Test Gun Resistance 1. Flush and dry the fluid passage.

2. For Model L40M14, L40T14, L40M15, and L40T15 guns only: Test the barrel continuity to verify that the metal pin in the barrel is properly grounded. Measure resistance between the metal pin (GP) and the air swivel (21). The resistance should be less than 100 ohms. If the resistance is 100 ohms or more, replace the gun body.

3. For all guns: Trigger the gun and measure resistance between the electrode needle tip (3) and the air swivel (21). The resistance should be:

Run this procedure

2000 Hourly Alternator Bearing Replacement

Prepare the Gun for Service

Power supply/alternator assembly removed and alternator disconnected

Resistance between the two outer terminals of the 3-wire connector (PC)

Clip (15h) removed from the housing (15d)

Fan (15e) rotated to clear the four bearing tabs (T) of the housing (15d)

Fan and coil assembly (15a) pushed out the front of the housing (15d)

Do not scratch or damage the magnet (M) or shaft (S). Do not pinch or damage the 3-wire connector (PC) when disassembling and reassembling the bearings.

Fan (15e) pried off the shaft (S)

Top bearing (15b2) removed

Run this procedure