Hitachi 4HK1 Workshop Manual page 24

14A-18 Service Information Guide (All)
Connector (Brass tapered screws)
Screw size
―
Connectors (Except brass tapered screws)
Screw size
： 5.9 to 11.8 N・m
― { 0.6 to 1.2 kgf・m /
52 to 104 lb・in }
Note：
・ The tightening torque for connectors (except
brass tapered screws) is only applied when the
mating side is not made of aluminum.
Note：
・ For the elbow-type connector, tighten it with
the minimum torque shown above and then
tighten it further until the angle matches.
・ Apply Loctite 575 to the threaded portion and
tighten. Completely dry and then let air in after
tightening.
・ Do not use seal tape, etc.
PT（R）1/8
： 2.0 to 14.7 N・m
{ 0.20 to 1.50 kgf・m /
18 to 130 lb・in }
PT（R）1/8 PT（R）1/4
： 14.7 to 29.4 N・
m { 1.5 to 3.0 kgf・
m / 11 to 22 lb・ft }
PT（R）1/4
： 4.9 to 15.7 N・m
{ 0.5 to 1.6 kgf・m / 43
to 139 lb・in }
PT（R）3/8
： 29.4 to 39.2 N・
m { 3.0 to 4.0 kgf・
m / 22 to 29 lb・ft }
PT（R）3/8
： 9.8 to 16.7 N・m
{ 1.0 to 1.7 kgf・m / 87
to 148 lb・in }
PT（R）1/2
： 29.4 to 58.8 N・
m { 3.0 to 6.0 kgf・
m / 22 to 43 lb・ft }
PT（R）1/12
： 9.8 to 17.7 N・m
{ 1.0 to 1.8 kgf・m / 87
to 157 lb・in }
PT（R）3/4
： 58.8 to 98.0 N・
m { 6.0 to 10.0
kgf・m / 43 to 72
lb・ft }