Lumbar Pump Replacement (Second Design)
REMOVAL PROCEDUREThe second design lumbar pump and control module are separate units that are attached to each other by a wire harness and a hose. They are supplied and replaced as an assembly. The lumbar pump is contained in a vinyl pouch under the seat and is tie strapped to the seat adjuster torque tube. The attached control module is contained in a vinyl pouch and is secured with J strips to the bottom of the seat support springs. The service part is supplied with connector fittings and the air hoses are labeled #3, #4, and #5 to aid in assembly.
Lumbar Pump Replacement: Second Design - Removal Procedure:
1. Raise the seat to the full up position.
2. Remove the seat.
3. Remove the seat cushion cover.
Lumbar Pump Replacement: Second Design - Removal Procedure:
4. Remove the tie straps attaching the pump to the torque tube (4) under the seat.
5. Remove the control module by unhooking the J strips from the seat cushion support wires.
6. Disconnect the electrical connector.
7. Reposition the pump and the lumbar control module from under the seat support wires to on top of the seat support wires.
Lumbar Pump Replacement: Second Design - Removal Procedure:
8. Cut the control module to bladder air hoses 75 mm (3 in) from the control module.
9. Remove the pump and control module assembly.
INSTALLATION PROCEDURE
Lumbar Pump Replacement: Second Design - Installation Procedure:
1. Lay the new pump and control module on top of the seat spring assembly.
2. Apply a very small amount of air (blow into the hose) to each of the three lumbar bladder hoses that were cut in step 8.
^ If the upper lumbar inflates, connect that hose to the hose labeled #3 on the new pump.
^ If the lower lumbar inflates, connect that hose to the hose labeled #4 on the new pump.
^ If the bolsters inflate, connect that hose to the hose labeled #5 on the new pump.
3. Using Loctite(TM) 406, or equivalent, glue the hoses to the fittings on the module.
3.1. Position the hoses so they are just over the edge of the barb on the attaching fitting.
3.2. Apply the adhesive completely around the fitting.
3.3. Quickly push the hose the rest of the way onto the fitting.
Lumbar Pump Replacement: Second Design - Installation Procedure:
4. Insert the pump and the control module down under the seat support wires.
5. Attach the control module with the J strips facing outward to the underside of the seat cushion support wires.
6. Connect the electrical connector to the control module.
7. Tie strap the pump to the torque tube (4) under the front of the seat.
Lumbar Pump Replacement: Second Design - Installation Procedure:
8. Install the seat cushion trim cover.
9. Install the seat.