Bronco L6-300 4.9L VIN Y 1-bbl (1983)
Technical Service Bulletin # 851917
Date: 850926
Front Drive Axle - Spindle Seal Premature Wear
Article No.
85-19-17
AXLE - FRONT DRIVE - SPINDLE SEAL IMPROVEMENT
LIGHT TRUCK
1982-86 F150/250 (4x4), BRONCO
Operation on vehicles in off-road, severe environments may result in the one-piece design spindle seal and the spindle needle bearing seal allowing water
and contaminants to get into the spindle needle bearings. This causes premature seal and bearing wear.
The following service action is suggested for installation of the previous style sealing system ("V" ring/"V" block seals and spacer/thrustwasher). This is
similar to the sealing system on the model 501FS used on F350 4x4's.
Removal
1.
Raise the front of the vehicle and install safety stands.
2.
Remove the lug nuts and remove the front wheel and tire assembly.
3.
Remove the caliper as described in Section 12-24, Disc Brakes - Light and Heavy Duty - Sliding Caliper of the 1986 Light Truck Shop Manual.
Securely wire the caliper to the frame.
CAUTION:
After removal, the caliper must be wired to the frame or otherwise supported to prevent suspending the caliper by the flexible hose. If securing the
caliper is not practical, disconnect and plug the hose to the caliper. Upon caliper installation, bleed the brake system as described in Section 12- 01,
General Hydraulic Brake Service in the 1985 Light Truck Shop Manual.
Figure 12 - DANA MODEL 44IFS FRONT DRIVING AXLE
4.
Remove the six Allen-head capscrews retaining the manual locking hub cap to the hub body and remove the cap.
5.
Remove the snap ring that retains the axle shaft in the hub body assembly.
