Hitachi ZW 100-G, Workshop Manual

Page: 51 / 61

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