F 250 4WD Pickup V8-6.9L DSL (1983)
THE VACUUM GAUGE ATTACHED TO LOWER PORT OF THE VRV SHOULD INDICATE 6-8 INCHES VACUUM. IF VACUUM
READING IS WRONG, ADJUST VRV TO OBTAIN READING OF SEVEN (7) INCHES OF VACUUM.
g.
To adjust, loosen the two (2) screws that attach VRV to fuel injection pump, Figure 22. Rotate VRV until proper vacuum is obtained. When
you get proper vacuum reading, tighten the two (2) screws to 75-90 in.lbs. (8-10.5 N-m). If VRV cannot be adjuted to get proper vacuum,
replace the VRV and repeat this procedure starting at Step D.
h.
Remove gauge block.
i.
Reattach throttle return spring and throttle cable.
j.
Apply 20 inches of vacuum to the VRV and WHILE MAINTAINING VACUUM, CYCLE THROTTLE LEVER FROM IDLE TO WOT
FIVE (5) TIMES. The vacuum gauge must indicate at least 13 inches with throttle at idle position. If vacuum gauge indicates less than 13
inches, the VRV must be replaced and the new VRV adjusted per the above procedure.
k.
After making the check or adjustment, remove vacuum pump and gauge from VRV and reattach vacuum connector.
l.
Start engine. Check throttle operation and check transmission shifts.
Correct VRV usage is necessary to be sure of proper vehicle and transmission performance. The current VRV usage (service) is as follows:
1983-86 model years
E5TZ-7B200-A
(green VRV cam)
1987 model year
E7TZ-7B200-A
(yellow VRV cam)
The wrong adjustment, or the wrong VRV, can result in delayed or harsh shifts.
4.
Remove noise choke from air cleaner tray assembly (late 1985 through 1987 model year vehicles only).
a.
Remove air cleaner assembly from vehicle.
b.
To avoid damage to alignment tabs or water drain tube (if equipped), place the tray only, open side up, on two supports (use 2 x 4 boards).
c.
Inside the air cleaner are six (6) spot welds which fasten the choke to tray bottom. Remove the spot welds without causing through holes in
the tray. Center punch spot welds. Using a spot weld cutter/remover, remove the spot weld.
d.
After you make sure each spot weld is removed, turn air cleaner tray over and place tray lip on two (2) supports to protect internal baffle, (if
so equipped).
e.
Using a board and hammer, drive out the choke and wing bolt guide assembly.
f.
Deburr all holes and sharp edges.
g.
If there is a through hole in the tray at any of the spot welds, clean those spot weld areas of any grime and/or paint on underside of tray. Use a
putty-type epoxy to seal the hole(s) by putting epoxy on underside of tray. Make sure seal is larger than the hole to guard against ingestion
into the air cleaner and engine. Let the epoxy cure.
h.
Clean the entire tray to be sure metal filings and shavings are removed.
i.
Spray unpainted surfaces with enamel base, black paint.
j.
Reinstall air cleaner assembly.
The noise choke in the air cleaner tray may cause a power reduction in heavy trailer tow applications. Removal of the choke may not cause a
noticeable increase in performance in lightly loaded vehicles (example, 0-50 mph/0- 80 km/h performance times on empty trucks may not
improve).
5.
Make sure the cooling fan clutch operates correctly (check for premature or constant engagement of fan clutch). Only fan clutches supplied by
Schwitzer and installed on vehicles prior to a December, 1986 build date (as shown on the vehicle ID plate) are suspected of this malfunction.
Schwitzer fan clutches were used on all E Series and some F Series (Ontario Truck and Norfolk Assembly Plants only) during all of the 1986 and
part of 1987 model years. The Schwitzer fan clutch can be identified by a gold-color ring of metal around the edge of the fan clutch. If a clutch is
suspect because of a
continuous noise, the unit should be removed and checked for inner bearing race retention using the following procedure.
