308-385
37
Service
Turbine Alternator Removal and
Replacement
NOTE: Replace the turbine bearings after 2000 hours
of operation. See your authorized Graco represen-
tative.
1. Prepare the gun for service as instructed on
page 29.
2. Remove the power supply from the gun body as
instructed on page 36.
3. Squeeze the two ends of the retaining ring (30)
together and carefully pull the alternator (25) away
from the power supply (27) until the wire connector
(V) disengages. See Fig. 31.
4. Use an ohmmeter to test the turbine alternator coil.
Measure the resistance between the two outer ter-
minals of the 3-wire connector (V). Resistance
should be 3 to 5 ohms. If the reading varies from
this value, replace the alternator.
5. Connect the 3-wire connector to the 3 prongs in
the power supply. Push the alternator (25) onto the
power supply (27) until the retaining ring (30)
engages with the alternator.
6. Install the power supply in the gun body as
instructed on page 36.
7. Assemble the gun as instructed on page 38.
