Fiat Kobelco EX355 Tier2, Technical Manual

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EX355 W5-1-11
GENERAL INFORMATION
NUT AND BOLT ANGULAR TIGHTENING
METHOD
The angular tightening method uses the plastic region
of high tensile steel nuts and bolts to precision tighten
important engine fasteners.
Because of the method’s nature, there is a limit to the
number of times a particular fastener may be reused.
This limit is specified in this Manual where applicable.
1. Carefully wash the nuts and bolts to remove all oil
and grease.
2. Apply a coat of molybdenum disulfide grease to
the threads and setting faces of the nuts and bolts.
3. Tighten the nuts and bolts to the specified torque
(snug torque) with a torque wrench.
4. Draw a line – across the center of each nut
or bolt.
5. Draw another line – on the face of each of
the parts to be clamped. This line should be an
extension of the line – .
6. Draw another line – on the face of each of
the parts to be clamped. This line will be in the
direction of the specified angle across the
center of the nut or bolt.
B
C D
A B
A
F
G
Q
E
Line
SM7002
Center line
SM7001
Specified angle
Coincide line
SM7003