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Hydraulic hose
The tightening torques for union joints and union adaptors with parallel pipe threads (G, PF) are
shown in the table below.
A union joint or adaptor will not become loose or leak as long as it is tightened by the specified
torque.
If fluid leaks from the sealed portion, do not attempt to tighten the union joint or adaptor forcibly.
Examine whether any foreign matter or scratches are present on the seat surface.
Tightening a union joint or adaptor forcibly could damage the connection of the joints.
When tightening a union joint or adaptor, use a torque wrench where possible and firmly tighten it by
an appropriate torque.
Nominal diameter of
the hose size
Nominal diameter of
the parallel pipe
threads (PF)
Tightening torque
N-m
kgf-cm
lb-in
6
1/4
24.50
250
221.28
9
3/8
49.03
500
564.91
12
1/2
58.84
600
677.89
15
3/4
117.68
1200
1,355.78
19
3/4
117.68
1200
1,355.78
25
1
137.30
1400
1,581.74
32
1-1/4
166.72
1700
1,920.69
38
1-1/2
205.94
2100
2,372.61
50
2
245.17
2500
2,824.54
Fittings with parallel threads (O-ring seal type)
The tightening torques for fittings with parallel threads (O-ring seal method) are shown in the table
below.
Tightening an adjustable joint forcibly with a spanner or other such tool to secure it to a set position
could damage the adjustable joint, its washers, and other parts. Be sure to tighten an adjustable
joint to the torque appropriate to its size.
Nominal diameter
of thread
Tightening torque
N-m
kgf-cm
lb-in.
1/4
34.32 - 49.03
350 - 500
309.79 - 442.55
3/8
68.65 - 78.45
700 - 800
619.57 - 708.08
1/2
98.07 - 117.68
1000 - 1200
885.10 - 1,062.12
3/4
147.10 - 176.52
1500 - 1800
1,327.65 - 1,593.18
1
245.17 - 274.59
2500 - 2800
2,212.75 - 2,478.28
1-1/4
294.20
3000
2,655.30
1-1/2
294.20
3000
2,655.30
2
392.27
4000
3,540.40
Maintenance standards and maintenance
FS900
Maintenance standards and maintenance
Page 3-7
Tightening torques
Summary of Contents for FS900
Page 1: ...Riding Sweeper Service Manual Serial No FS900 10001 Ver 1 0...
Page 4: ...FS900 Contents...
Page 10: ...FS900 Safety Page 1 6 Safety Signs and Instruction Signs...
Page 11: ...Waste Disposal Page 2 2 About the Waste disposal Page 2 2 Disposal FS900 Disposal Page 2 1...
Page 28: ...FS900 Maintenance standards and maintenance Page 3 16 Greasing...
Page 74: ...FS900 Hydraulic system Page 4 46 Inspection and repair of each section...
Page 98: ...FS900 Electrical system Page 5 24 General inspection and repair...
Page 118: ...FS900 Main body Page 6 20 Inspection and repair of each section...