KNEGT 404G2 Series, Operation Manual

Page: 70 / 105

404G2
SERIES TRACTOR OPERATION MANUAL
68
While assembling the spiral-bevel pinion and the spiral crown gear, the pre-stress of the
bearings in main drive has to be
correctly established first, and
the meshing of the pinion and
crown gear could be then
adjusted.
As to the spiral bevel pinion, its
pre-stress of bearings is to be
adjusted by screwing down the
Locking nut (2). The torque to be
applied for turning the
spiral-bevel pinion should be
kept between 1.176
～
1.764 N. m.
after the assembling is completed.
If the torque can’t be measured
by a specific apparatus, then it
must be adjusted by an
experienced people. After adjusting is made, the locking nut (4) must be tightened, and
the angles of check shim (3) should be pulled down into slots of the two lock nuts
respectively. The axial position of the spiral-bevel pinion is to be adjusted by adding
or deducting the adjusting shims (1), the pinion will goes forwards if the adjusting
shims (1) are added, the pinion will withdraw if the adjusting shims (1) are deducted.
The adjustment of crown gear is realized by altering the Adjusting shims (7) on the left
and right Bearing seats (8). While adding or reducing the adjusting shims (7) of same
thickness to or from either bearing seat, the pre-stress of bearings is alternated but the
crown gear position will kept unchanged; if moving the Adjusting shim (7) from one
bearing seat to the another one, the crown gear will be shifted towards the side where
the Adjusting shim (7) is added but the pre-stress of bearings will remain unchanged.
The pre-stress of the spiral crown gear bearings should be kept between 1.2
～
1.8 N. m.
Fig. 6-3 Main drive mounting diagram
1. Adjusting shims of pinion gear 2. Locking nut 3.
Check washer 4. Locking nut 5. Pinion gear
6. Crown gear 7. Adjusting shim of crown gear 8.