Bosch Rexroth 31 Series Instruction Manual page 40

40/60 Installation
Table 12: Tightening torques for female threads and threaded plugs
Ports
Standard Thread size
DIN 3852 M14 × 1.5
M16 × 1.5
M18 × 1.5
M22 × 1.5
M27 × 2
ISO 11926 7/16-20 UNF-2B
9/16-18 UNF-2B
3/4-16 UNF-2B
7/8-14 UNF-2B
1 1/16-12 UN-2B
DIN ISO 228 G 1/4 in
1) The tightening torques for the threaded plugs apply when the plugs are dry or lightly oiled.
2) The tightening torques for the threaded plugs apply when the plugs are dry – when lightly oiled, the tightening torques for M10 × 1 are
reduced to 10 Nm and to 17 Nm for M12 × 1.5.
Procedure
Bosch Rexroth AG, A10VO, A10VSO Series 31, RE 92701-01-B/04.2018
Maximum permissible
tightening torque
of female threads M
G max
80 Nm
100 Nm
140 Nm
210 Nm
330 Nm
40 Nm
80 Nm
160 Nm
240 Nm
360 Nm
70 Nm
To connect the axial piston unit to the hydraulic system:
1. Remove the protective plugs or threaded plugs from the ports where the
connections should be made according to the hydraulic circuit diagram.
2. Make sure the sealing surfaces of the hydraulic ports and functional surfaces are
not damaged.
3.
Use only clean hydraulic lines or flush them before installation.
(Observe chapter 7.5 "Performing flushing cycle" on page 42 when
you flush out the entire system.)
4.
Connect the lines in accordance with the installation drawing and the machine
or system circuit diagram. Check that all ports are connected or plugged with
threaded plugs. With inside-reservoir installation, the case of the axial piston unit
must be filled before fitting the lines and filling the reservoir with hydraulic fluid.
5. Tighten the fittings correctly (observe tightening torques!). Mark all correctly
tightened fittings, e.g. with a permanent marker.
6. Check all pipes and hose lines and every combination of connecting pieces,
couplings or connecting points with hoses or pipes to ensure they are in safe
working condition.
Required tightening
torque of threaded
plugs M
V
35 Nm
1)
50 Nm
1)
60 Nm 1)
80 Nm 1)
135 Nm 1)
18 Nm
35 Nm
70 Nm
110 Nm
170 Nm
–
wAF hexagon
socket of the
threaded plug
6 mm
8 mm
8 mm
10 mm
12 mm
3/16 in
1/4 in
5/16 in
3/8 in
9/16 in
–