Replacing the Motor. Titan Tool Impact 840

replacing the motor

1. Perform the Pressure Relief Procedure and unplug the sprayer.

2. Loosen and remove the two motor cover screws. Remove the motor cover.

3. Loosen and remove the three belly pan screws. Remove the belly pan.

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. Pull back the control panel 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.

8. Pull the motor out of the pump housing.

NOTE: 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. With the motor removed, inspect the gears in the pump housing for damage or excessive wear. Replace the gears, if necessary.

10. Install the new motor into the pump housing.

11. Secure the motor with the four motor mounting screws.

12. Reconnect the wires (refer to the electrical schematic in the

Parts List section of this manual).

13. Position the control panel on the pump housing and secure in position using the four control panel mounting screws.

14. Replace the belly pan. Secure with the three belly pan screws.

15. Slide the motor cover over the motor. Secure the motor cover with the two motor cover screws.

replacing the Gears

1. Perform the Pressure Relief Procedure and unplug the sprayer.

2. Loosen and remove the two motor cover screws. Remove the motor cover.

3. Loosen and remove the three belly pan screws. Remove the belly pan.

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. Pull back the control panel 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.

8. Pull the motor out of the pump housing.

NOTE: 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 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 for damage or excessive wear. Replace if necessary.

11. Remove and inspect the gear and crank assembly for damage or excessive wear. Replace if necessary.

12. Reassemble the pump by reversing the above steps. During reassembly, make sure the thrust washer is in place.

NOTE: refill the gear box in the pump housing with five ounces of Lubriplate (P/N 314-171).

Motor mounting screw

Motor cover

Control panel mounting screw

Control panel

Motor cover

Control panel mounting screw

Control panel

Front cover

Front cover screw

Belly pan

Belly pan screw

Motor

Motor mounting screw

Motor cover screw

Front cover

Front cover screw

Motor

Belly pan

Belly pan screw

2nd stage gear

Gear and crankshaft

Thrust washer

Motor cover screw

© Titan Tool Inc. All rights reserved.

English