Hitachi EX20UR-2 Manual page 14

IMPORTANT: (1) Apply lubricant (i. e. white zinc B
dissolved into spindle oil) to nuts
and bolts to stabilize their friction
coefficients.
(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 suffi-
cient tightening force.
(4) The torques given in the chart are
for general use only.
Do not use these torques if a dif-
ferent torque is given for a specif-
ic application.
(5) Make sure that nut and bolt
threads are clean before installing.
Remove dirt or corrosion, if any.
Bolt Tightening Order
When tightening two or more bolts, tighten them alter-
nately, as shown, to ensure even tightening.
Equally tighten upper Tighten diagonally Tighten from center
and lower alternately and diagonally
W105-01-01-003
0 0
(4
000
0 0 0
O
Ot
()
2.3
GENERAL INFORMATION/Tightening
W01-02-05