Ranger 4WD V6-3.0L VIN V Flex Fuel (1999)
Wheel Hub (Locking): Testing and Inspection
Special Tools
NOTE: Whenever the front wheel hub, axle shaft or the hub lock is removed and installed, the front wheel-end assemblies must be leak-checked
to ensure that the sealing surfaces are intact. Failure to do so can cause the loss of four wheel drive operation and contamination of the vacuum
system.
1. Disconnect the wheel-end vacuum hose.
2. Connect the hand vacuum pump part of the Vacuum Tester to the vacuum hose.
3. NOTE: The wheel-end assembly must not leak more than 0.50 in-Hg in thirty (30) seconds.
Apply 15 inch Hg of vacuum to the wheel-end assembly and observe the reading for thirty (30) seconds.
4. Repeat the leak testing procedure for the opposite wheel-end.
