Graco Hydra-Cat 207-388 F, Instructions And Parts List

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To Inspect or Replace Drive Spline or Mixing Shaft
If mixer motor runs but material is not mixed properly:
Use a spanner wrench to unscrew the connecting hous-
ing retainer nut (23) CLOCKWISE off the air motor-it
has left hand threads. Inspect the spline shaft
for
wear or damage and replace if necessary. Also check
the thrust spring
and replace if it is weak or broken.
See Fig 4.
Screw the mixing assembly retaining nut (11) COUNT-
ERCLOCKWISE off the head
and remove the mix-
ing assembly. Remove the mixing shaft from the
chamber See Figures 5 and 6. Place parts in sol-
vent and clean thoroughly. Inspect parts for wear or
damage. Replace the entire mixing assembly if the mix-
ing chamber is nicked or scored. Check the o-ring in
place on the head and replace if necessary.
To inspect or replace the drive shaft clean all
material off the shaft, then loosen the packing nut (19)
and pull the shaft through the back of the connecting
housing. If the shaft is damaged in any way, replace it.
Check the packing contact area for burrs or scratches
which will cause premature packing wear.
To reassemble, install one or two washers (27) between
the spline shaft and air motor to obtain a 0.347 to 0.437
in. (8.8 to 11 mm) dimension. Refer to Detail in Fig 4.
Leave the packing nut (19) loose until the mixer is
assembled, then tighten.
Replace Packings
If material leaks around the packing retainer
and
tightening the packing nut does not stop it:
(8.8 to 11.1
Disassemble the mixer as explained above. Turn the
packing nut all the way up against the housing retaining
nut
Remove the packing retainer See Fig 5.
Remove the packings carefully, using a suitable hooked
tool. Be careful not to scratch the housing Inspect
the packing retainer gland end. If it is damaged, replace
the retainer.
Insert a new male gland into the housing, then in-
stall new packings one at a time, pushing each all
the way into the housing. Install the packing retainer in
the housing
Reassemble the mixer, then tighten
the packing nut (19) snugly, just enough to stop
leakage.
4 2 ’
Fig 5