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GEAR BOX 6450
30
3.3
INSPECTION:
Following points should be checked before
starting to assemble on the main shaft and
counter shaft.
Gear teeth for breakage, wear, pitting,
scoring and overheating marks.
Bearing seats for rotation marks.
Splines for breakage, burrs and wear on
sides.
Main shaft oil seal lip contact area for wear.
Main shaft diameter and collar for scoring,
rubbing and overheating marks.
SYNCHRO CONE INSPECTION:
Inspect cone surface for wear on 1st, 2nd, 3rd,
4th, 5th, 6th and reverse main shaft and
counter shaft gear.
Place the synchro cone on matching gear
cone and rotate until it stops (approx. 10 to 20
degrees) then measure the clearance between
ring and gear.
Check for synchro cone gap with the help of
feeler gauge.
Double sychrocone gap should be 1.05 -1.25 mm.
Triple sychrocone gap should be 1.15 - 1.40 mm.
SHIFTER SLEEVE AND ENGAGING GEAR
INSPECTION:
Inspect the gear teeth on all engaging gear and
shifter sleeves for rounded off corners, indicating
wear.
Install each engaging gear in its mating sleeve and
check free movement.
NOTE:
If replacement is required, always replace the
shifter sleeve and engaging gear as a unit.
Inspect inside of synchro cone and synchro cone
teeth for wear.
SUB ASSEMBLY OF GEARS (Except Reverse
Gear):
It consists of gear and synchro cone ring.
REVERSE GEAR ASSEMBLY:
It consists of reverse gear, shifter sleeve and
struts.