Hitachi ZX70-3, Руководство по ремонту

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GENERAL / Tightening
W1-2-3
IMPORTANT: The following items are applied to
both fine and coarse pitch threads.
1. Apply lubricant (i. e. white zinc B
dissolved Into Spindle oil) to
nuts and bolts to reduce their
friction coefficients.
The plated bolts require no lu-
bricant.
2. Torque tolerance is 10 %.
3. Be sure to use bolts of correct
length. Bolts that are too long
cannot be tightened, as the bolt
tip comes into contact with the
bottom of the bolt hole. Bolts
that are too short cannot develop
sufficient tightening force.
4. The torques given in the chart
are for general use only. Do not
use these torques if a different
torque is given for a specific ap-
plication.
5. Make sure that nut and bolt
threads are clean before install-
ing.
Remove dirt or corrosion, if any.
Bolt Tightening Order
When tightening two or more bolts, tighten them al-
ternately, as shown, to ensure even tightening.
W105-01-01-003
1
6
4
2
3
Equally tighten upper and lower alternately Tighten diagonally
Tighten from center and diagonally
1st to 4th
2nd to 3rd
13 11 10
14
12
7
6 1 4
3 2 5 8
9
5