Pinion; Ball Bearing; Assembly - Komatsu 4D98 Series Shop Manual

9.
Starting
Motor
(5)
4
b)
cl
(6)
(Shunt coil continuity test)
Pinion
Check the pinion teeth for wear and damage. Replace with a new one, if necessary.
Check if the. pinion slides smoothly. If it is damaged or rusted or does not slide smoothly,
repair.
Check springs for damage, and replace if necessary.
Ball bearing
If abnormalities such as irregular noises are detected to the ball bearing, replace with a new
one.
9.2.7 Assembly
(Series coil continuity test)
The assembly procedure is reverse of the disassembly procedure, but pay attention to the following
points.
(1) Apply grease as instructed below.
Greasing point
Grease type
Sliding portions and head of plunger
Pinion metal and metal portions of gear case
NPC-FCGA Grease
Spline portions of pinion
Sliding portions of shift lever
Deceleration gear
MALTEMP SRL Grease
(2) Armature thrust
No adjustments are needed for the thrust.
(3) Gear shaft thrust
Some thrust washers of 1 .O and 0.25 mm thickness are provided between the center
bracket and gear shaft supporting surface. Make sure to check them at reassembly.
If washers are deformed or worn, replace them with new ones.
The appropriate thrust is from 0.05 to 0.3 mm.
If it is over 0.3 mm, add the appropriate
thrust washer, but pay attention so that the thrust is not 0.
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