Bosch Rexroth A4VG 40 Series - Page 44

44/68 Installation
Bosch Rexroth AG, A4VG Series 40, RE 92004-01-B/05.2017
Table 11: Tightening torques for female threads and threaded plugs
Ports
Maximum permissible
tightening torque of
the female threads M
Gmax
Required tightening torque
of the threaded plugs M
V
WAF hexagon socket of
the threaded plug
Standard Thread size
ISO6149 M8×1 10 Nm 7 Nm 4 mm
M10×1 30 Nm 15 Nm 5 mm
M12×1.5 50 Nm 25 Nm 6 mm
M14×1.5 80 Nm 45 Nm 6 mm
M16×1.5 100 Nm 55 Nm 8 mm
M18×1.5 140 Nm 70 Nm 8 mm
M20×1,5 170 Nm 80 Nm 10 mm
M22×1.5 210 Nm 100 Nm 10 mm
M27×2 330 Nm 170 Nm 12 mm
M30×2 420 Nm 215 Nm 17 mm
M33×2 540 Nm 310 Nm 17 mm
M42×2 720 Nm 330 Nm 22 mm
M48×2 900 Nm 420 Nm 22 mm
ISO11926 5/16-24 UNF-2B 10 Nm 7 Nm 1/8 in
3/8-24 UNF-2B 20 Nm 10 Nm 5/32 in
7/16-20 UNF-2B 40 Nm 18 Nm 3/16 in
9/16-18 UNF-2B 80 Nm 35 Nm 1/4 in
3/4-16 UNF-2B 160 Nm 70 Nm 5/16 in
7/8-14 UNF-2B 240 Nm 110 Nm 3/8 in
1 1/16-12 UN-2B 360 Nm 170 Nm 9/16 in
1 5/16-12 UN-2B 540 Nm 270 Nm 5/8 in
1 5/8-12 UN-2B 960 Nm 320 Nm 3/4 in
1 7/8-12 UN-2B 1200 Nm 390 Nm 3/4 in
1)
The tightening torques for the threaded plugs are valid for the condition “dry” and “lightly oiled”.
2)
The tightening torques for the threaded plugs are valid for the condition “dry” – in the condition “lightly oiled”, the tightening torques
for M10×1 are reduced to 10Nm and for M12×1.5 to 17Nm.
To connect the axial piston unit to the hydraulic system:
1. Remove the protective plugs or threaded plugs at the ports at which the
connections are to be made according to the hydraulic circuit diagram.
2. Make sure that 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 45 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 whether all ports are connected or plugged with
threaded plugs.
5. Tighten the fittings correctly (note 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
condition for safe working.
For relationship between direction of rotation and flow direction, please refer
to data sheet 92004.
Procedure