User's Manual

10 308345
Maintenance
Prolonging the Life of the Bearing Nut
CAUTION
Use a compatible solvent to clean parts. The bearing
nut (8) is made of acetal, which is not compatible
with acidic fluids. Check your material data sheet
and/or supplier for compatibility. Avoid getting any
solvent on the air motor belt.
 Replace the bearing nut (8) if it is damaged or
worn.
 Do not allow fluids to dry out in the fluid section.
Dry fluid will adhere to the bearing nut (8) and could
destroy it the next time you start the mixer. Flush
the fluid section before you change colors or coat-
ings or store the mixer.
 Do not operate the mixer without fluid in the drum
as this can cause excessive bearing nut (8) wear.
Cleaning the Fluid Tubes
To prevent fluid from drying on the tubes and interfer-
ing with helix rotation, clean the siphon tube (4) and
helix tube (7) when you change colors or coatings and
when the mixer is removed from the drum long enough
for the fluid to dry. Also, clean the fluid tubes for peri-
odic maintenance as follows:
1. Remove the bearing nut (8). See Fig. 7.
2. Remove the two diagonal socket-head screws (24)
and lockwashers (25) protruding from the top of
the siphon cover (6).
3. Remove the siphon tube (4) as follows:
a. Rest the mixer on its side on the drive belt
housing so the inlet is lower than the outlet.
This orientation prevents fluid from running
into the bearing and drive belt area.
b. Pull up on the fluid outlet fitting (41) to remove
the siphon tube (4).
4. Clean the siphon tube (4), helix tube (7), and
bearing nut (8). The inside diameter of the tubes
can be cleaned by pulling a solvent-soaked rag
through them.
NOTE: Always after you mix or pump catalyzed mate-
rials that could set up between the tubes without air,
remove the siphon tube, and clean both tubes.
5. Apply PTFE spray lubricant to the siphon tube (4)
inlet end only. Install the siphon tube through the
top of the mixer housing (3).
6. Install the two socket-head screws (24) and lock-
washers (25) into the top of the siphon cover (6).
Torque the screws oppositely and evenly to 60 to
70 in-lbs (6.8 to 7.9 Nm).
7. Apply PTFE spray lubricant to the inside lip of the
bearing nut (8), and tighten it onto the helix
tube (7).
33
4
8
7
3
Fig. 7
24
25
41
5
18
24
6
Torque oppositely and evenly to 60 to 70 in-lbs (6.8 to 7.9 Nm).
Torque oppositely and evenly to 80 to 100 in-lbs (9 to 11.3 Nm).
Apply PTFE spray lubricant to inside lip of bearing nut before
you install it.
Apply PTFE spray lubricant to the siphon tube (4) inlet end
before you install it.
1
1
2
2
3
3
4
4
Model 236629 shown
16a
03403B
03403B