Delta 20-140 Service Manual download pdf (Page 15)

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Daily Gun Care, Flushing, and Cleaning

WARNING

PRESSURIZED EQUIPMENT HAZARD

To reduce the risk of a serious injury whenever you

are instructed to relieve pressure, follow the Pres-

sure Relief Procedure on page 13.

1. Relieve the pressure.

2. Shut off the gun fan and atomizing air.

3. Supply a compatible solvent to the gun fluid inlet.

4. Point the gun down into a grounded metal con-

tainer, and flush the gun with solvent until all traces

of paint are removed from the gun passages.

5. Relieve the pressure.

6. Disconnect the solvent supply.

7. Remove the air cap retaining ring and air cap.

8. Trigger the gun while you remove the fluid nozzle

from the gun using a wrench, or remove the piston

cap to relieve the pressure the springs put on the

needle.

CAUTION

Trigger the gun or remove the piston cap whenever

you tighten or remove the nozzle. This keeps the

needle seat away from the nozzle seating surface

and prevents the seat from being damaged.

9. Clean the air cap retaining ring, air cap, and fluid

nozzle with solvent.

10. Dip the end of a soft-bristle brush into a compatible

solvent. Do not continuously soak the brush’s

bristles with solvent and do not use a wire brush.

Fig. 11

02007

11. With the gun pointed down, clean the front of the

gun, using the soft-bristle brush and solvent.

12. Scrub the air cap retaining ring, air cap, and fluid

nozzle with the soft-bristle brush. To clean out air

cap holes, use a soft implement, such as a tooth-

pick, to avoid damaging critical surfaces. Clean the

air cap and fluid nozzle daily, minimum. Some

applications require more frequent cleaning.

Fig. 12

02011

13. Trigger the gun or remove the piston cap while you

install the fluid nozzle with the wrench. Tighten the

nozzle securely to 145–155 in-lb (16.4–17.5 Nm)

to obtain a good seal.

14. Install the air cap retaining ring and air cap.

15. Dampen a soft cloth with solvent and wring-out the

excess. Point the gun down and wipe off the

outside of the gun.

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Delta 20-140 Service Manual Page 15

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