307671D ULTRA 400 AIRLESS PAINT SPRAYER - Graco Inc.

13. Use a plastic mallet to gently tap the displacement
pump (19) from the rear to loosen the drive housing
(6) from the front end bell. Then pull the drive housing
away from the front end bell.
CAUTION ~
DO NOT allow the gear cluster (26) to fall when
removing the drive housing (6). It is easily damaged
if dropped. The cluster may stay engaged in
either the front end bell or the drive housing.
DO NOT lose the thrust balls (24) located at each
end of the gear cluster (261 or allow them to fall
between gears. The ball, which is heavily covered
with grease, usually stays in the gear recesses, but
could be dislodged. If caught between gears and
not removed, the balls will seriously damage the
drive housing. If the balls are not in place, the
bearings will wear prematurely.
14. Use a 6 mm (114") hex key wrench to remove the
two screws (35) and lockwashers (34) from the
underside of the motor mounting frame. Be sure to
support the motor to keep the sprayer from tlppmg.
15. Lift the motor assembly off the frame.
16. Place the new motor assembly on the frame and
align-with the frame mounting holes. Install the
screws (351 and lockwashers (34) tightly.
17. Liberally grease the gear cluster (26) and pinion
gear (0) and pack all bearings in the motor front
end bell. Check to be sure the thrust balls (24) are in
place.
18. Be sure the bronze-colored bearing (81a1 and the
silver-colored bearing (81b) are properly placed on
the crank shaft (81).
19. Align the gears and push the drive housing (6)
straight onto the front end bell and locating pins.
20. Starting at Step 13 and working backwards, continue
to reassemble the sprayer.
NOTE: Use a turning motion on the conduit when
feeding wires through it.
20. Reinstall the motor shield and pressure control
cover.
Fig 32