Separate The Air Motor And Pump - Graco Therm-O-Flow 20 Instructions - Parts Manual

Repair
Separate the Air Motor and
Pump
This procedure must be done with the unit still warm.
The material and equipment will be hot!
1. If the material drum has already been removed from
the supply unit, go to step 2. If you need to remove
the material pail, perform steps 1 through 6 of the
Change Pail section, page 37. Pump must be in
the full down position (Air Motor shaft fully
extended).
2. Make sure the Ram plate is down and the Ram
Director Valve (CC) is in the neutral position.
3. Follow Pressure Relief Procedure on page 34.
4. Bleed off excess material and pressure in the
system by opening the dispense gun and catching
the material in a waste container.
5. On the ADM, turn off the system heat (D).
6. Turn the Main Power Switch OFF.
7. Disconnect all material hoses.
50
8. If the system includes a Pump shield, remove the
Pump sheet metal enclosure (A). See F
a. Remove the cover screws (B).
b. Remove the heater bands (HB) and disconnect
9. Pump must be in the full down position (Air Motor
shaft fully extended).
10. If vent hood is installed, remove it.
11. Disconnect the electrical cable from the Air Motor
(X).
12. Remove the air line from the Air Motor and air lines
to the follower blow-off valve.
13. Remove nuts (F) from Pump/Air Motor tie rods at
the Pump end.
14. Remove the nuts and bolts (T) holding the cable
tract to the Air Motor support plate. Slide the end of
the Cable Track outboard of the mounting plate.
15. Remove the screws and the washers from the
Pump inlet.
CC
16. Fully loosen the Pump rod coupler (G) to the Air
Motor rod.
17. Slowly raise the elevator to achieve enough
separation of the Pump (Air Motor) tie rods to
remove the Pump.
18. Remove the Pump (P).
19. Reverse this procedure to reinstall the new or
rebuilt Air Motor.
the ground wire (R).
. 29.
IG
334129S