25
repairs at the unit
Impact 540
11.5
replAcINg The geArS
i
The following procedure must only be performed
by a Titan Authorized Service Center.
1. Open the relief valve, valve position PRIME (
k
circulation). Switch the unit OFF. Unplug the power plug
from the outlet.
2. Loosen and remove the two motor cover screws (fig. 17,
item 1). Remove the motor cover (2).
3. Loosen and remove the three belly pan screws (3). Remove
the belly pan (4).
4. On the back of the motor, disconnect the wire coming
from the potentiometer and the wire coming from the
transducer. Also, disconnect the two wires coming from
the control panel board (refer to the electrical schematic
in the Parts List section of this manual).
5. Remove the four control panel mounting screws (5). Pull
back the control panel (6) for access to the control panel
board.
6. At the the control panel board, disconnect the two wires
coming from the motor (refer to the electrical schematic in
the Parts List section of this manual).
7. Loosen and remove the four motor mounting screws (7).
8. Pull the motor (8) out of the pump 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.
9. Inspect the armature gear (9) on the end of the motor for
damage or excessive wear. If this gear is completely worn
out, replace the entire motor.
10. Remove and inspect the 2nd stage gear (10) for damage or
excessive wear. Replace if necessary.
11. Remove and inspect the gear and crank assembly (11) for
damage or excessive wear. Replace if necessary.
12. Reassemble the pump by reversing the above steps.
During reassembly, make sure the thrust washer (12) is in
place.
8
7
1
4
12
11
10
9
3
2
6
5
