18
307-809
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 N
m (75–80 ft-lb). Torque the
tie rod locknuts to 68–75 N
m (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 N
m (75–80 ft-lb). Torque the tie rod
locknuts to 68–75 N
m (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 N
m (75–80 ft-lb). Torque the tie rod
locknuts to 68–75 N
m (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 N
m (50–55 ft-lb).
On V
iscount 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 N
m (75–80 ft-lb).
6. Torque the screws (M) holding the adapter plate
(L) to the motor (E) to 20–23 N
m (15–17 ft-lb).
Torque the tie rod locknuts (B) to 68–75 N
m
(50–55 ft-lb).
