Komatsu 830E-AC Shop Manual page 184

Do not push the piston in place. Forcing the
piston will usually cause the seal rings to be cut.
28. Carefully place the piston in the pulley. Without
pressing down on the piston, rotate it slowly
back and forth until it falls into place.
FIGURE 7-68.
29. Align the tangs of the piston for final assembly
of the fan clutch. Lift the front bearing retainer
sub-assembly in place on the pulley. While
doing so, the slots of the front bearing retainer
will engage the tangs of the piston, and the
retainer will rest against the pulley.
Then, rotate the bearing retainer (and piston)
until the bolt holes align in the bearing retainer
and pulley. Carefully remove the bearing
retainer sub-assembly.
C7-30
30. Install spring washer (25), shim (26), and
spirolock ring (27). It will be necessary to press
downward to compress the spring washer while
forcing the spirolock to properly seat in the
groove. The shim must then be centered on the
spring washer to prevent it from interfering with
the movement of the piston.
31. Place the front bearing retainer sub-assembly
on the bench with the clutch hub up. Install one
steel clutch plate (31) in place in the bearing
retainer. Dip one facing plate (30) in new engine
oil. Allow the excess oil to drain off, then place
the facing plate on top of the steel plate.
Repeat this step until all 16 plates have been
installed.
Fan Clutch
FIGURE 7-69.
FIGURE 7-70.
C07001