d Look at contact patterns on the ring gear
teeth. Compare patterns to the following:
(1) The location of a good hand rolled contact
pattern should be between center and toe
of tooth and in center between top and
bottom of tooth.
(2) When carrier is being operated, a good
pattern will extend approximately full
length of gear tooth. The top of pattern
will be near top of gear tooth.
(4) If contact patterns require adjustment,
continue by following step 3 to move
contact patterns between top and bottom
of gear teeth. If contact patterns are in
center of gear teeth, continue by following
e Change thickness of shim pack (30) under
retainer (21) to move the contact patterns
between top and bottom of gear teeth.
(3) The location of a good hand rolled contact
Use following procedure.
pattern for an old gear set MUST match
wear pattern in bevel gear. The contact
pattern will be smaller in area than wear
A high contact pattern indicates that
the drive pinion was not installed
deep enough into the carrier. A low
contact pattern indicates that the
drive pinion was installed too deep in
(1) Remove drive pinion and retainer (21)