Vacuum Regulator Valve - Adjustment Procedure
83ford7 Article No. 83-10-21-SVACUUM REGULATOR VALVE (VRV) CHECK AND ADJUSTMENT PROCEDURE (6.9L DIESEL) - WITH AUTOMATIC TRANSMISSION
LIGHT TRUCKS 1983/84 E & F SERIES
The following article is being re-issued to update the warranty status information. It was originally issued as Article 83-10-21 dated May 17, 1983.
The vacuum regulator valve (VRV) provides a vacuum signal to control transmission shift points. The VRV should have its vacuum setting periodically checked at 5,000; 15,000; 30,000; 45,000; 60,000; 75,000 and 90,000 miles; or on an as-required basis if shift points are not to specification. (See the following table for shift points).
The Vacuum Regulator Valve (VRV) Check and Adjustment Procedure is as follows:
NOTE: The engine MUST NOT be running through all Steps 1 through 12 when adjusting the VRV to specification.
Figure 23:
1. Disconnect the two port vacuum connector from the VRV which is located on the left side of the fuel injector pump (Figure 23).
Figure 24:
2. Remove the throttle cable from the pump throttle lever which is located on the right side of the fuel injector pump (Figure 24).
3. Remove the throttle return spring. Install the end of the spring over the throttle lever ball stud and the other end over the throttle cable support bracket. Insert the gage block, tool T83T-7B200-AH, between the pump boss and the wide-open throttle stop screw (Figure 24). The spring will hold the throttle lever against the gage block for subsequent vacuum check and adjustment of the VRV.
Figure 25:
4. Attach a vacuum pump to the upper port of the VRV, labeled "VAC" (Figure 25).
5. Attach a vacuum gage to the lower port of the VRV, labeled "TRANS".
6. Apply 20 inches of vacuum to the VRV and maintain. The vacuum gage attached to the VRV should indicate 6.9 +/- 0.5 inches of vacuum. If the vacuum reading is not correct, adjust the VRV.
7. To adjust the VRV, loosen the two mounting screws that attach the VRV to the fuel injection pump. Rotate the VRV to 6.9 +/- 0.5 inches of vacuum and tighten the two screws to maintain the vacuum. If the VRV cannot be adjusted to obtain the specified vacuum, replace the VRV.
8. Remove the gage block.
9. Re-attach throttle return spring and assure fuel injection pump lever has returned to and stays at the linkage idle position.
10. Again apply 20 inches of vacuum to the VRV and maintain. The vacuum gage must indicate at least 13 in. Hg. If the vacuum gage indicates less than 13 in. Hg., the VRV must be replaced and the new VRV adjusted per the above procedures.
11. Remove the vacuum pump and gage from the VRV and re-attach the vacuum connector to the VRV.
12. Re-attach the throttle cable.
OTHER APPLICABLE ARTICLES: 83-10-21
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. 7B200 Code: 53