Hitachi EX550-5, Руководство по ремонту

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GENERAL INFORMATION / Tightening
W1-2-7
O-ring Seal Joint
O-ring (6) is located on the end face of adapter (7) to
seal pressure oil at the joint.
IMPORTANT: (1) Be sure to replace O-ring (6) with
new one when reconnecting.
(2) Check that O-ring (6) is Correctly
seated in O-ring groove (8)
before tightening union nut (9). If
union nut (6) is tightened with
O-ring (6) displaced from the
groove, O-ring (6) will be
damaged, causing oil leaks.
(3) Take care not to damage O-ring
groove (8) on adapter (7) and
sealing face (10) of the hose end.
Damaged O-ring (6) will cause oil
leaks.
(4) If oil leaks due to looseness of
union nut (9), always replace O-
ring (6) with new one and check
that the O-ring is correctly
seated in O-ring groove (8)
before re-tightening union nut
(9).
M104-07-033
Wrench Size Tightening Torque
Union Nut Union Body N
⋅
m (kgf
⋅
m) lbf
⋅
ft
19
22
27
36
41
50 17
19
22
30, 32
36
46
59 (6)
98 (10)
118 (12)
235 (24)
295 (30)
490 (50)
43
72
87
134
215
360
7 6 9
8 10
Union Body