Komatsu D475A-5E0 Operation & Maintenance Manual page 279

SERVICE PROCEDURE
METHOD OF USING POWER WRENCH
The power wrench set is equipped with a special socket.
This socket is designed to grip the nuts and prevent the wrench set
from pulling out. This means that tightening can be performed by
one worker.
This socket has a double construction, and is designed so that the
outside can rotate 30 deg.
It is used as follows.
(1) Cutting edges or end bit
(2) Ratchet handle or torque wrench
(3) Rotating socket
(4) Reaction arm
1. Align the hexagons of the inside socket (6) and outside socket
(5), the insert the nut that is to be tightened or loosened.
2. After inserting the nut, turn the outside socket (5) 30· clockwi
se (7).
When this is done, the outside socket will catch the notch in the
nut seat surface, and the wrench will not come off.
3. Put the reaction arm (4) in contact with the blade rib, and
tighten or loosen.
4. Turn the outside socket (5) counterclockwise, and remove the
wrench.
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MAINTENANCE