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Changing the Mix Ratio on the Three Dis-
placement Pump Models
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
To change the fluid ratio of the proportioning pump, the
displacement pumps must be changed. Refer to the
Proportioning Pump Chart on page 16. Completely
flush the system and pump out the solvent. Shut off
the air to the pumps and relieve the pressure. Then
proceed as follows:
CAUTION
If you are changing to a different type of fluid, com-
pletely clean all the equipment and hoses, making
sure that no fluid remains in any part of the system.
1. Disconnect the three fluid riser hoses from the fluid
pumps' outlets.
Example:
12
Fig. 5
Operation
2. Unscrew the three unions (9) from the intakes of
the displacement pumps and remove the manifold
(20).
3. Remove the two retaining nuts (6) from the two
outer pumps' displacement rods (E). Screw the
fluid pump retaining rings (15) off the fluid pumps
(use a screwdriver and hammer to loosen). See
Fig. 5.
4. Pull the two outer pumps down out of the retaining
plate (12). Remove the washers from the displace-
ment rods.
5. Using a wrench on the flats of the center pump's
displacement rod, screw the rod out of the yoke
(13). See Fig. 5. Then remove the center pump
and remove the washer from its displacement rod.
6. Refer to the Proportioning Pump Chart on page
16 for mix ratios for different combinations as
instructed in the Service Section. Install the center
pump first, then the two outside pumps.
7. Screw the unions (9) securely onto the intakes of
the fluid pumps. Flush the system, then start up as
explained on page 11.
Wrench on flats of
rod to remove center
displacement pump.
6
13
14
15
E
307132
05230
15
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