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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

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Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Graco Electrostatic Air Spray Gun L40M10

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Maintenance Plans for Graco Electrostatic Air Spray Gun Model L40M10

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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

Clip removed from the housing

Cap removed from the housing

Fan and coil assembly pushed out the front of the housing

Do not scratch or damage the magnet or shaft. Do not pinch or damage the 3-wire connector when disassembling and reassembling the bearings.

Fan pried off the shaft

Top bearing removed

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1 Daily Air Spray Gun Maintenance

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

Check gun resistance

Check hose resistance

Check electrical grounding

Check hoses, tubes, and couplings

Check equipment

Daily Care and Cleaning Checklist

Flush the gun

Clean the fluid and air line filters

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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:

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