Komatsu PC200-8M0 Shop Manual page 1024

SEN06144-00
6. Ring nut
1) Install ring nut as follows.
1] Rotate the hub 2-3 times.
2] Use the tool J2 and the push tool [5]
to press the inner race of the bearing
(27).
a Pressing force:
29.4 – 38.2 kN {3.0 – 3.9 ton}
3] Rotate the hub to the both directions
at least 5 times in total with the bear-
ing inner race pressed.
4] Release the pressing force.
5] Press the bearing again.
a Pressing force:
17.7 – 21.6 kN {1.8 – 2.2 ton}
6] Rotate the hub 2 – 3 times.
7] Measure the size (a) under the condi-
tion described in 6] above.
a After measuring the size (a), remove
the tool J2.
8] (b) is the thickness of the ring nut
(25) itself.
9] Calculate the value of (c) by subtract
(b) from (a).
10] Using tool J1, tighten ring nut (25)
until dimension (d) becomes value
below.
Dimension (d): c (+0.06/-0.04) mm
8
50-300
Disassembly and assembly of final drive assembly
2) Measure the tangential force of the hub
against the motor case in the rotation
direction using the push scale [6].
a Tangential force:
490 N or less {50 kg or less}
a The tangential force denotes the
maximum force at start of the rotation.
3) Install lock plate (24).
a Install the lock plate so that the
splines (A) of the lock plate and the
motor are in full contact.
2
Mounting bolt thread:
a Do no apply the adhesive (LT-2) to
the tapped portion of the nut.
PC200, 200LC, 220, 220LC-8M0
300 Power train
Adhesive (LT-2)