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Service
Turbine Alternator Replacement
NOTE: Replace turbine bearings after 2,000 hours of
operation. See your authorized Graco representative.
1. Prepare the gun for service as instructed on page
22.
2. Remove the power cartridge from the gun handle
as instructed on page 27.
3. Squeeze the two ends of the retaining ring (35)
together and carefully pull the alternator (37) away
from the power supply until the 3-wire connector
(F) disengages. See Fig. 18, page 27.
4. Use an ohmmeter to test the turbine alternator coil.
Measure the resistance between the two outer
terminals of the 3-wire connector (F). The
resistance should be 3 to 5 ohms. If the reading
varies from this value, replace the alternator.
5. 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.
6. Connect the 3-wire connector to the 3 prongs in
the power supply. Push the alternator onto the
power supply until the retaining ring engages with
the alternator.
7. Install the power cartridge in the gun handle as
instructed on page 27.
Barrel Installation
1. Be sure the gaskets (34 and 18a) and spring (30)
are in place. See Fig. 19. Replace if damaged.
2. Place the barrel (3) over the power cartridge (18)
and onto the gun handle (7). Make sure the fluid
needle spring (30) is seated properly.
3. Tighten the three socket head cap screws (5)
oppositely and evenly to 18 in-lbs (2 NSm) maxi-
mum (about a half turn past snug) with the wrench
(63) supplied.
4. Tighten the three socket head cap screws (5)
oppositely and evenly with the wrench (63) sup-
plied. Tighten the cap screws to 18 in-lbs (2 NSm)
maximum (about a half turn past snug).
CAUTION
To avoid damaging the gun, do not over-tighten the
cap screws (5).
5. Assemble the fluid tube (12) back into the fluid
fitting (10).
6. Test the gun resistance as instructed on page 19.
Fig. 19
3
34
30
18
5
7
10
18a
06453
12
Tighten to 18 in-lbs (2 NSm) maximum (about half turn past
snug), using wrench provided.