Service, Disconnecting the Displacement Pump

Service

Disconnecting the Displacement Pump

NOTE: In stand or wall-mounted installations, you do not have to remove the entire pump from its mounting.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 12.

1.Relieve the pressure.

2.Disconnect the hoses from the displacement pump and plug the ends to prevent fluid contamination.

3.Disconnect the displacement pump from the motor as follows:

For Senator and Bulldog air-powered pumps: Unscrew the coupling nut (A). Unscrew the lock- nuts (B) from the tie rods (C). Pull the displace- ment pump (D) off the motor (E). Remove the pin

(F)and screw the coupling (G) off the piston rod

(H).See Fig. 5.

For President air-powered pumps:

Unscrew the coupling nut (K) of the coupling rod

(G)from the piston rod (H). Unscrew the locknuts

(B)from the tie rods (C). Pull the displacement pump (D) off the motor (E). See Fig. 6.

For Viscount hydraulic-powered pumps: Unscrew the coupling nut (K) of the coupling rod

(G)from the piston rod (H). Unscrew the locknuts

(B)from the tie rods (C). Pull the displacement pump (D) off the motor (E). See Fig. 7.

Reconnecting the Displacement Pump

1.Reconnect the displacement pump to the motor as follows:

For Senator and Bulldog air-powered pumps: Make sure the o-ring (J) is in place in the coupling

(G). Screw the coupling onto the piston rod (H) and install the pin (F). Orient the displacement pump (D) to the motor (E) as shown in Fig. 5.

Position the displacement pump (D) on the tie rods

(C). Lubricate the threads of the tie rods. Screw the locknuts (B) onto the tie rods loosely. Screw the coupling nut (A) onto the motor shaft and torque to 102–109 NSm (75–80 ft-lb). Torque the tie rod locknuts to 68–75 NSm (50–55 ft-lb).

For President air-powered pumps: Orient the displacement pump (D) to the motor (E) and

adapter plate (L) as shown in Fig. 6. Position the displacement pump (D) on the tie rods (C). Lubri- cate the threads of the tie rods. Screw the locknuts

(B)onto the tie rods loosely. Screw the coupling nut (K) onto the piston rod (H) and torque to 102–109 NSm (75–80 ft-lb). Torque the tie rod locknuts to 68–75 NSm (50–55 ft-lb).

For Viscount hydraulic-powered pumps: Orient the displacement pump (D) to the motor (E) and adapter plate (L) as shown in Fig. 7. Position the displacement pump (D) on the tie rods (C). Lubri- cate the threads of the tie rods. Screw the locknuts

(B) onto the tie rods loosely. Screw the coupling nut (K) onto the piston rod (H) and torque to 102–109 NSm (75–80 ft-lb). Torque the tie rod locknuts to 68–75 NSm (50–55 ft-lb).

2.Flush and test the pump before reinstalling it in the system. Connect hoses for flushing. Flush the pump. While it is pressurized, check for smooth operation and leaks. Adjust or repair as necessary before reinstalling in the system. Reconnect the pump ground wire before operating.

Reassembling a Motor with an Adapter Plate

If your motor has an adapter plate, use this procedure when reassembling the motor and pump, to ensure proper alignment of the motor shaft to the piston rod.

1.Loosen the screws (M) holding the adapter plate

(L)to the motor (E). See Fig. 8.

2.Screw the tie rods (C) into the adapter plate (L) and torque to 68–75 NSm (50–55 ft-lb).

On Viscount I+ pumps, the tie rods will engage threaded holes in the base of the motor.

3.Fill the cavity in the bottom of the motor shaft with grease. Screw the coupling (G) into the motor shaft until the pin holes align. Install the pin (F) in the second hole from the end of the coupling for President pumps, and in the first hole from the end of the coupling for Viscount pumps.

4.Align the tie rods (C) with the displacement pump and loosely install the locknuts (B).

5.Screw the coupling nut (K) onto the piston rod (H) and torque to 102–109 NSm (75–80 ft-lb).

6.Torque the screws (M) holding the adapter plate

(L)to the motor (E) to 20–23 NSm (15–17 ft-lb). Torque the tie rod locknuts (B) to 68–75 NSm (50–55 ft-lb).