Are bubbles visible at the wheel bearing outer seal?
Yes
REPLACE the wheel hub and bearing; REFER to
Section 204-01B
. TEST the system for normal operation.
No
GO to
E31
.
E31
BUBBLE CHECK THE WHEEL END SHAFT SEAL
Remove the two screws and slide the wheel end shaft seal cover back.
WARNING: Do not use shop pressure when performing this check.
CAUTION: Do not apply more than 2 psi to the vacuum lines when performing this check.
Apply 2 psi pressure to the vacuum wheel end input line.
Apply soapy water to the wheel end shaft.
Are bubbles visible at the wheel end shaft?
Yes
REPLACE the wheel end shaft seal; REFER to
Section 204-01B
. TEST the system for normal operation.
No
GO to
E32
.
E32
CHECK THE HUBLOCK FOR VACUUM LEAKS
Remove the hublock assembly; refer to
Section 204-01B
.
Connect hublock Vacuum Test Cap to the wheel end.
Connect a hand vacuum pump to the wheel end vacuum supply hose and try to pull a vacuum to 10-12 in/Hg.
Does the vacuum drop exceed 0.5 in/Hg in 30 seconds?
Yes
GO to
E33
.
No
REPLACE the hublock and O-ring; REFER to
Section 204-01B
. TEST the system for normal operation.
Page 60 of 62
2000 Ranger Workshop Manual
1/18/2012
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSYL/~MUS~LEN/21/...