Screw-In Connection; Seal Tape Application; Low-Pressure-Hose Clamp Tightening - Hitachi ZW 100-G Workshop Manual

Screw-In Connection

Depending on types of screw and sealing, different
types of screw-in connection are used.
IMPORTANT: Check that the thread pitch and
thread type (tapered or straight) are
the correct type before using any
screw-in connection. (In general, the
screw-in connection of male tapered
thread
measurement purpose.)

Seal Tape Application

Seal tape is used in order to seal clearances between
male and female threads so that any leaks between
threads may be prevented. Therefore, apply just
enough seal tape to fill up thread clearances. Do not
overwrap.
•
Application Procedure
Check that the thread surface is clean and, free of
dirt or damage. Apply the seal tape around
threads in order to leave one to two pitch threads
uncovered. Wrap the seal tape in the same
direction as the threads.

Low-Pressure-Hose Clamp Tightening

Low-pressure-hose clamp tightening torque differs
depending on the type of clamp.
T-Bolt Type Band Clamp:
4.5 N⋅m (0.45 kgf⋅m, 3.3 lbf⋅ft)
Worm Gear Type Band Clamp:
6 to 7 N⋅m (0.6 to 0.7 kgf⋅m, 4.4 to 5.2 lbf⋅ft)
GENERAL / Tightening
is used except
R
a
a - Male Tapered Thresd
for
Wrench Size mm
Hose Fittings
19
22
27
36
41
50
60
NOTE: Unit: N
c - Internal Thread
d - External Thread
ｆ - Leave one to two pitch
threads uncovered
ｇ
g - T-bolt Type Band Clamp
W1-2-7
G
30°
b
b - Male Straight Thread
Tightening Torque
N⋅m (kgf⋅m, lbf⋅ft)
FC material SS material
15 (1.5, 11) 35 (3.5, 26)
30 (3.0, 22) 50 (5.0, 37)
50 (5.0, 37) 95 (9.5, 69)
70 (7.0, 51) 160 (16, 115)
110 (11, 80) 210 (21, 155)
160 (16, 116) 330 (33, 240)
200 (20, 145)
⋅ ⋅ ⋅
m (kgf m, lbf ft)
c
d e
e - Clearance
ｆ
h
M114-07-042
h - Worm Gear Type Band Clamp
W105-01-01-018
W105-01-01-019
M114-07-041
M114-07-043