Graco 965478, 965477, 965481, 965479 Service, Required Tools, Disconnecting the Displacement Pumps

Service

Required Tools

•Set of large adjustable wrenches

•Set of metric sockets or wrenches

•Large pipe wrench

•Torque wrench

•Rubber mallet

•Flat end punch

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 pump being removed. Each displacement pump must be returned to its original position and orientation.

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.

2.Relieve the pressure.

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.

CAUTION

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.

16 684025