Graco D-55, Instructions Manual

Maintenance 

16

311320K

Maintenance

Gun Service Kits

Use either the 1-Quart Gun Service Kit (296980) or 
3-Gallon Gun Service Kit (296981) to perform daily 
flushing of spray gun without disassembly.

For more information about the 1-Quart Gun Service Kit, 
see manual your Gun Service Kit manual.

For more information about the 3-Gallon Gun Service 
Kit, see manual 311341.

Clean Spray Gun

This procedure makes use of the 1-Quart or 3-Gallon 
Gun Service Kit.

1. Close both manual valves.

2. Remove gun from coupling block.

3. Attach service block of gun service kit to spray gun, 

and then tighten using 5/16 in. nut driver.

4. Pressurize container to 100 psi.

5. Open one manual valve on service block.

6. Trigger gun while holding against a grounded waste 

container until there is a fine, unobstructed mist of 

gun cleaner.

7. Release trigger of gun and 1-quart kit, and close 

manual valves on service block.

8. Repeat steps 5-7 for other side of gun.

9. After initial cleaning, remove air cap and flush a 

second time to ensure thorough cleaning.

10. Remove service block of gun service kit from spray 

gun.

11. Disconnect air supply.

12. Clean screens, check valves and screen screw. See 

NOTE: Clean Center Line Components using 

Gun Service Kit prior to performing any repair 

procedures.

 procedure, page 17.

NOTE: 

Inspect air cap, mixing chamber, and gun block 

for build up of material and clean as required. Do not 
use metal cleaning devices to clean plastic components.

F

IG

. 15 1-Quart Gun Service Kit

F

IG

. 16 3-Gallon Gun Service Kit

Chemicals used while spraying may cause the gun 
surface to become hot to touch. Thoroughly flush gun 
block with gun cleaner before removing valving rod or 
mixing components from gun block. Also allow 
chemicals in spray gun to cool before cleaning.