Service The Agitator Shaft And Couplings - Graco 236661 Instructions Manual

7. Set the coupling as instructed under Set the
Agitator Shaft Coupling, on page 13.
NOTE: Do not use the four screws supplied with the
replacement gear reducer to secure it; those screws will
not properly secure the gear reducer. Use the cap
screws and washers (33 and 40) removed from the old
gear reducer. Be careful not to spill any oil from the gear
reducer.
Service the Agitator Shaft and
Couplings
Set the Agitator Shaft Coupling
1. With the agitator shaft (14) pushed up against the
washer (15a), secure the lower portion of the
coupling half (19b) to the shaft by tightening the
coupling setscrew against the flat on the shaft.
Leave about a 0.015 in. gap between the coupling
half and washer (15b).
2. Secure the upper coupling half (19a) to the gear
reducer shaft by tightening the coupling setscrew
into the keyway. Leave about a 0.015 in. gap
between each of the coupling halves (19a, 19b) and
the load cushion (R).
Replace the Agitator Shaft
1. Remove the agitator paddle. Remove the setscrew
from the lower coupling (19b). Pull out the agitator
shaft (14) and install the new shaft.
2. Replace the agitator paddle.
3. With the agitator shaft (14) pushed up against the
washer (15a), secure the lower portion of the
coupling half (19b) to the shaft by tightening the
coupling setscrew against the flat on the shaft.
Leave about a 0.015 in. gap between the coupling
half and washer (15b).
308371R
Replace the Coupling
1. Remove the three cap screws (18), washers (7) and
spacers (8) from the mounting bracket (6).
2. Lift the air motor and gearbox off the tank cover.
Remove the two coupling halves (19a, 19b) from the
shaft ends.
3. Install the new coupling halves on the shaft ends.
Replace the air motor/bracket assembly and the
three cap screws (18), washers (7) and spacers (8)
to fasten the mounting bracket.
Replace the Shaft Seals
1. Remove the three cap screws (18), washers (7),
and spacers (8) from mounting bracket (6), and
move the air motor assembly.
2. With air motor assembly removed, remove the
setscrew from the lower coupling half (19b). Pull out
the agitator shaft (14).
3. Remove the hex nut (16) and remove the shaft
housing (9). Remove the seals (9a, 9b) from the
shaft housing, and install the new seals.
4. Reinstall the shaft housing and shaft. Use
installation steps listed in Set the Agitator Shaft
Coupling, page 13.
Service
13