16
Performance Series 750e
GB
Repairs at the unit
17. Carefully tighten retainer nut (6) with adjusting wrench.
18. Slide the top of the piston (3) into the T-slot (10) on the
slider assembly (4).
19. Position the pump manifold (2) underneath the gear unit
housing and push up until it rests against the gear unit
housing.
20. Attach pump manifold (2) to the gear unit housing. Ensure
that the pressure sensor does not damage the pressure
sensor seal (10).
21. Screw pump manifold (2) tightly to gear unit housing.
22. Lubricate O-ring (Fig. 10, Item 6) between pump manifold
(2) and inlet valve housing with machine grease. Screw
inlet valve housing to the pump manifold.
23.
Stand units -
Push connection bend of suction hose into
the inlet valve housing (Fig. 10, Item 1) and secure with
retaining clip. Screw on return hose and clamp to suction
hose.
Cart units -
Thread the siphon tube into the inlet valve
and tighten securely. Make sure to wrap the threads on
the down tube with Teflon tape before assembly. Replace
the return hose into the hose clip on the siphon tube.
24. Install front cover.
11.4 Replacing the motor assembly
Electrostatic discharge (ESD) potential could
cause damage to electronic control. use Titan
ESD wrist strap P/N 0507958 or equivalent when
working on electronic control with electronic
cover removed.
1. Open the relief valve, valve position PRIME (
k
circulation), switch the unit OFF, and unplug the power
cord.
2. Remove the four motor cover screws (Fig. 15, Item 1).
Remove the motor cover (2).
3. Slide the electronic cover (3) off of the electronic control
assembly (4) on the motor.
4. Remove the four heat sink assembly screws (5). Pull back
the heat sink assembly (6) to access and disconnect the
two wires coming from the motor.
5. At the electronic control assembly, disconnect the wire
coming from the potentiometer and the wire coming from
the transducer.
6. Loosen and remove the four motor (7) mounting screws.
7. Pull the motor (8) out of the gear box housing.
i
If the motor will not dislodge from the pump
housing:
• Remove the front cover plate.
• Using a rubber mallet, carefully tap on the
front of the motor crankshaft that extends
through the slider assembly.
8. With the motor removed, inspect the gears in the gear
box housing for damage or excessive wear. Replace the
gears, if necessary.
9. Install the new motor into the gear box housing.
10. Secure the motor with the four motor mounting screws.
11. Reconnect the wires to the electronic control assembly
(refer to the electrical schematic in section 11.7 of this
manual).
12. Connect one of the motor wires to the power cord and the
other to the ON/OFF switch.
13. Position the electronic cover over the electronic control
assembly.
14. Position the heat sink assembly on the gear box housing
and secure in position with the four heat sink assembly
mounting screws
15. Slide the motor cover over the motor. Secure the motor
cover with the four motor cover screws.
5
6
3
4
8
1
7
2
11.5 Replacing the Gears
Electrostatic discharge (ESD) potential could
cause damage to electronic control. use Titan
ESD wrist strap P/N 0507958 or equivalent when
working on electronic control with electronic
cover removed.
1. Open the relief valve, valve position PRIME (
k
circulation), switch the unit OFF, and unplug the power
cord.
2. Loosen and remove the four motor cover screws (Fig. 16.
1). Remove the motor cover (2).
3. Slide the electronic cover (3) off of the electronic control
assembly (4) on the motor.
4. Remove the four heat sink assembly screws (5). Pull back
the heat sink assembly (6) to access and disconnect the
two wires coming from the motor.
5. At the electronic control assembly, disconnect the wire
coming from the potentiometer and the wire coming from
the transducer.
6. Loosen and remove the four motor mounting screws.
7. Pull the motor (8) out of the gear box housing.
i
If the motor will not dislodge from the pump
housing:
• Remove the front cover plate.
• Using a rubber mallet, carefully tap on the
front of the motor crankshaft that extends
through the slider assembly.
8. Inspect the rotor gear (9) on the end of the motor for
damage or excessive wear. If this gear is completely worn
out, replace the motor.
9. Remove and inspect the 2nd stage gear assembly (10) for
damage or excessive wear. Replace, if necessary.
