Service; Required Tools; Disconnecting The Displacement Pump - Graco Hydra-Cat H.P. Series Instructions Manual

Required Tools

•
Set of large adjustable wrenches
•
Set of metric sockets or wrenches
•
Large pipe wrench
•
Torque wrench
•
Rubber mallet
•
Flat end punch
WARNING
To reduce the risk of serious injury or amputation,
carefully follow all instructions listed below. In addition,
be sure that the pressure relief procedure has been
completed and that the main bleeder-type air valve has
been turned off and locked out before removing ANY
guards or covers from the proportioner.
Disconnecting the Displacement Pump(s)
1. Flush the System. Follow the procedure on page
11.
Relieve the pressure.
2.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the Pressure
Relief Procedure on page 11.
3. Disconnect the siphon hose and the fluid outlet hose.
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Service

4. With the bleeder type main air valve turned off (1),
remove the thumb screws (14) and the two guards
(15) from the sides of the proportioner.
5. Disconnect the displacement pump (3) from the frame
(5) as follows:
6. Note the relative position of the pump's fluid outlet (23)
to the frame and also note the frame location of
displacement
displacement pump must be returned to its original
position and orientation.
Be sure to use two people when lifting, moving, or
disconnecting the pump. This pump is too heavy for one
person. Be sure to support the displacement pump while
it is being disconnected, to prevent it from falling and
causing injury or property damage. Do this by securely
bracing the pump, or by having at least two people hold it
while another disconnects it.
7. Using an adjustable wrench (or hammer and punch),
unscrew the coupling nut (10,11) from the rod adapter
(13). Do not lose or drop the coupling collars (12). See
Fig. 6.
8. Hold the tie rod flats with a wrench to keep the rods
from turning. Unscrew the nuts (8) from the tie rods
(7). Carefully remove the displacement pump (3)
from the frame.
9. Refer to the separate manual supplied for
displacement pump service. Some models use two
different displacement pumps. Be sure to look at the
model number and use the appropriate manual for
service and reference.
pump being removed.
CAUTION
Each