Seat Lumbar Support System - Air Leak
84ford18Article No. 84-4-3
SEAT - FRONT - WITH LUMBAR SUPPORT SYSTEM - AIR LEAK DIAGNOSIS
FORD 1984 THUNDERBIRD
LINCOLN-MERCURY 1984 COUGAR
In the event of premature deflation of the lumbar support system, the following diagnostic procedure should be followed.
NOTE: The lumbar support system is designed to maintain 4. psi air pressure for a period of four
(4) hours. However, a loss of .5 psi is considered acceptable.
1. Obtain the following part:
Hose - rubber - 5/32" I.D. x 8.0" - cut from bulk
FIGURE 7:
2. Check the hose connections at the squeeze bulb and valve assembly which is located at the front inboard side of the seat cushion and the connection at the rear of the seat on the inboard side at the junction of the seat back and seat cushion. If a poor connection is found, service as required (Figures 7 and 8).
3. Disconnect the hose from the squeeze bulb and valve assembly. Then, connect an air pressure gauge (having maximum reading capacity of five (5) P.S.I.) and the rubber hose procured in Step 1 as shown in Figure 7.
4. Inflate the lumber support system to 4 P.S.I.
5. The lumbar support system should retain this pressure for a period of four (4) hours however, a loss of .5 P.S.I. is considered acceptable. If the system retains an acceptable amount of pressure, remove the gauge, then, install the squeeze bulb and valve assembly and release the vehicle. If not, proceed to Step 6.
6. Inflate the lumbar support system to 4 P.S.I. Then, using a small "C" clamp or similar tool, pinch the hose closed between the gauge and the squeeze bulb and valve assembly. This will isolate the squeeze bulb and valve assembly from the remainder of the system.
7. If the system retains an acceptable amount of pressure replace the squeeze bulb and valve assembly. Then, repeat Stops 4 and 5. If the system does not retain an acceptable amount of pressure, proceed to Step 8.
FIGURE 8:
8. Transfer the squeeze bulb and valve assembly and the gauge from the inflating hose at the front of the seat cushion to the hose connection at the rear of the seat as shown in Figure 8.
9. Inflate the lumbar support system to 4 P.S.I.
10. If the lumbar support system retains an acceptable amount of pressure (specified in Step 5) replace the inflating tube contained within the front seat cushion. (Refer to Section 41-28 of the 1984 Thunderbird/Cougar Car Shop Manual). If the system does not retain an acceptable amount of pressure proceed to Step 11.
11. Remove the seat and track assembly from the vehicle. Refer to the removal procedures contained in Group 41 of the 1984 Thunderbird/Cougar Car Shop Manual as indicated below:
^ Seats with manual seat tracks 41-01.
^ Seats with power seat tracks 41-08.
12. Remove the seat back trim cover and pad assembly as outlined in Section 41-28 of the appropriate car shop manual.
13. Inspect the inflating tube, tube connections and the lumbar support pad for poor connections or damage and service as required. If visual inspection does not reveal the source of the pressure loss, proceed to Step 14.
FIGURE 9:
14. Remove the lumbar support system's pressure relief valve (if so equipped). Then, install the squeeze bulb and valve assembly and the pressure gauge as shown in Figure 9.
15. Inflate the lumbar support system to 4 P.S.I.
16. If the lumbar support system retains an acceptable amount of pressure (specified in Step 5) replace the pressure relief valve (if so equipped) if the system does not retain an acceptable amount of pressure, proceed to Step 17.
17. Replace the lumbar support pad as outlined in Section 41-28 of the 1984 Thunderbird/Cougar Car Shop Manual. Then, retest the lumbar support pad to verify that the system has been serviced.
18. Install the lumbar support system's relief valve (if so equipped) and the inflating tube.
19. Install the front seat back pad and trim cover as outlined in Section 41-28 of the 1984 Thunderbird/Cougar Car Shop Manual.
20. Install the front seat back to the front seat cushion. Torque the attaching screws as indicated below:
^ Inboard pivot - 19-27 N-m (14-20 ft.lbs.).
^ Seat back latch/adjuster to cushion - 20-43 N-m (15-32 ft.lbs.).
21. Connect the lumbar support tube at the rear of the seat back.
22. If the seat is equipped with an inertia seat back latch, check the latch for proper operation (sensitivity test) before installing the seat in the vehicle as follows:
^ With the seat and track assembly positioned on a flat surface, grasp the seat cushion only and slowly tilt the seat assembly forward enough to cause the seat back to tilt forward (via gravity).
^ The latch should engage at this point (11 degrees from the original position) restricting the seat back from tilting to its full forward position.
23. Install the seat and track assembly in the vehicle. Refer to installation procedures contained in Group 41 of the 1984 Thunderbird/Cougar Car Shop Manual as indicated below:
^ Seats with manual seat tracks - 41-01
^ Seats with power seat tracks - 41-08
24. Torque the seat track to floor pan attachments to 25-44 N-m (18-32 lb.ft.).
25. Check the seat tracks for proper operation.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: M
TIME: "Actual Time" as defined in the Warranty and Policy Manual. DLR. CODING: Basic Part No. Code: 48