Hitachi EX550-5, Руководство по ремонту

Страница: 15 / 20

GENERAL INFORMATION / Tightening
W1-2-8
Screwed-In Connector
IMPORTANT: Many types of screwed-in connec-
tors are used for hose or pipe con-
nections.
Be sure to confirm that the thread
pitch and thread type (tapered or
straight) correctly match before
connection.
Seal Tape Application
Seal tape is used to seal clearances between male
and female threads, so as to prevent any leaks be-
tween threads.
Be sure to apply just enough seal tape to fill up the
thread clearances. Wrapping too much tape has no
effect.
•
Application Procedure
Confirm that the thread surface is clean, free of dirt
or damage.
Apply seal tape around threads as shown. Wrap
seal tape in the same direction as the threads.
Low-Pressure-Hose Clamp Tightening Torque
Low-pressure-hose clamp tightening torque differs
depending on the type of clamp.
See below for correct tightening torque of each type
of low-pressure-hose clamp.
T-Bolt Type Band Clamp:
4.4 N
⋅
m (0.45 kgf
⋅
m, 3.25 lbf
⋅
ft)
Worm Gear Type Band Clamp:
5.9 to 6.9 N
⋅
m (0.6 to 0.7 kgf
⋅
m, 4.3 to 5.1 lbf
⋅
ft)
W105-01-01-018
Male Tapered Thread
Wrench Tightening Torque
Joint Body N
⋅
m (kgf
⋅
m) lbf
⋅
ft
17, 19
19, 22
27, 22
36, 32
41
50
61
70
59 (6)
98 (10)
118 (12)
235 (24)
295 (30)
490 (50)
670 (68)
980 (100)
43
72
87
134
215
360
190
720
W105-01-01-019
M114-07-041
M114-07-042 M114-07-043
30
°
PF PT
Male Straight Thread Male Tapered Thread
Male Thread Clearance
Female Thread
Leave one to two pitch threads uncovered
Worm Gear Type T-Bolt Type