Graco Inc 247936, 312900C Remove and Replace Turbine Alternator, Repair Fan Air Adjustment Valve

Remove and Replace Turbine Alternator

Replace turbine alternator bearings after 2000 hours of operation. Order Part No. 223688 Bearing Kit.

1.Prepare gun for repair, page 27.

2.Remove the power supply/alternator assembly, page 32.

3.Disconnect the alternator from the power supply, page 32.

4.Measure resistance between the two outer termi- nals of the 3-wire connector (GG); it should be

2.5-3.5 ohms. If outside this range, replace the alter- nator coil.

5.Follow the bearing replacement procedure in the bearing kit manual 308034.

6.Install the alternator on the power supply, page 32.

7.Install the power supply/alternator assembly, page 32.

Gun Repair

Repair Fan Air Adjustment Valve

1.Prepare the gun for service, page 27.

2.Place a wrench on the flats of the valve assembly (20) and unscrew it from the handle (17).

You may replace the valve as an assembly (go to step 9) or as individual parts (steps 3-9).

3.Remove the retaining ring (20a). See FIG. 19.

4.Turn the valve stem (20d) counterclockwise until it comes free from the valve housing (20c).

5.Remove the o-ring (20b).

6.Clean all parts and inspect for wear or damage.

Use non-silicone grease, Part No. 111265. Do not over-lubricate.

7.When reassembling the fan air valve (20), lightly lubricate the valve threads and screw the stem (20d) fully into the housing (20c) until bottomed. Install the o-ring (20b*), lubricate, and unscrew the valve stem until the o-ring enters the housing.

8.Reassemble the retaining ring (20a). Unscrew the valve stem from the housing until it is stopped by the retaining ring.

9.Screw the valve assembly (20) into the gun handle, using a wrench on the flats of the housing. Torque to 15-25 in-lb (1.7-2.8 N•m).

20d

TI1487A

20b*

20c

20a

Fig. 19. Fan Air Adjustment Valve

312900C 33