Power Supply Turbine Alternator Service - Graco SuperCat 232096 Instruction Manual

Power Supply Turbine Alternator Service

NOTE: Replace turbine bearings after 2000 hours of
operation. Part No. 223688 Turbine Alternator Repair
Kit is available.
1. Follow the Pressure Relief Procedure on page 20.
2. Turn off the air to the control.
3. Open the access door (125). See Fig. 105.
4. See the parts drawing, page 102, for the location of
the power supply.
5. Disconnect the electrical connector (118b) from the
wire harness.
6. Remove the two screws (103) and remove the
power supply (118) from the control.
7. Remove the six screws (118f) and carefully sepa-
rate the power supply housings (a., b.). See Fig.
113.
8. Disconnect the 3-wire connector (c.) from the
circuit board (118c).
9. Carefully pull the alternator (118g) out of the
housing (a.).
10. Use an ohmmeter to test the turbine alternator coil.
Measure the resistance between the two outer
terminals of the 3-wire connector (c.). The resist-
ance should be 3 to 5 ohms. If the reading varies
from this value, replace the alternator.
11. Measure the resistance between each outer
terminal of the 3-wire connector and the turbine
alternator housing. The resistance should be
infinite. If the resistance is not infinite, replace the
alternator.
12. Inspect the gasket (118a), o-ring (118h), and
cushion (118j) and replace if damaged or worn.
Service
13. Push the alternator (118g) into the housing (a.).
14. Connect the 3-wire connector (c.) to the circuit
board (118c).
15. Assemble the power supply housings (a., b.) and
secure them with the screws (118f).
16. Secure the power supply (118) to the control with
the screws (103).
17. Connect the electrical connector (118b) to the wire
harness.
18. Close the access door (125). See Fig. 105.
118g
c.
118j
Ref. 118b
Fig. 113
NOTE: Exploded assembly orientation
a.
reversed to clearly see parts.
118h
118a
118c
b.
118k
118
118e
118f
118d
118b
7499A–part