User's Manual
308345 11
Maintenance
Lubricating the Air Motor
(Model 236629 Only)
CAUTION
Not lubricating the air motor will cause air motor failure.
If an air line lubricator is not installed, the air motor
must be manually lubricated every 8 hours. Lubricate
the agitator air motor by placing 10–20 drops of SAE
#10 light oil in the motor’s air inlet. Run the agitator for
about 30 seconds.
Cleaning the Air Intake Check Valve
The air intake check valve (33) allows make-up air to
enter the closed drum as fluid is drawn out through the
mixer outlet port. See Fig. 7. The air intake check
valve should be inspected and cleaned every 2000
operating hours or when there are any signs of the
drum beginning to collapse as fluid is drawn out.
Pump priming problems can indicate a plugged air
intake check valve. Paint overspray in the air can be
drawn into the valve and cause the ball to stick in the
closed position.
To clean the air intake check valve
1. Remove the seat (33) and ball (34). See the Parts
Drawing on page 16.
2. Clean the parts with compatible solvent, and
reassemble the valve.
3. Insert the ball (34), and tighten seat (33) un-
til just snug.
NOTE: The seat should not be flush with
the elbow (32). Installing the seat too
tightly could jam the ball against the seat.
Correcting a Bad Suction Line Seal
Air getting pulled into the suction line makes the pump
inefficient. This can happen for the following reasons:
Cavitation is occurring, because the pump or helix
is going too fast.
Siphon hose connection is leaking.
Nylon rings (22) are not sealing. See Fig. 8.
To correct the problem (see Fig. 8)
1. Torque the four socket-head screws (24) in the
siphon fitting (5) oppositely and evenly to 80 to 100
in-lbs (9.0 to 11.3 Nm).
NOTE: If Step 1 does not correct the problem, do
Steps 2 through 5.
2. Replace the rings (22). Make sure the outer lips
face up, as shown in Fig. 8.
3. Insert the inlet tube (4) into the bottom of the
siphon fitting (5).
4. Tap the bottom of the inlet tube (4) to make sure
the tube passes through the rings (22) and seats
on the siphon fitting (5).
5. Torque the four socket-head screws (24) in the
siphon fitting (5) oppositely and evenly to 80 to 100
in-lbs (9.0 to 11.3 Nm).