Bosch Rexroth A6VM series 71 User Manual

Bosch Rexroth Corp., RE-A 91610/12.2015
6 A6VM series 71 | Axial piston variable motor
Flow direction
Filtration of the hydraulic fluid
Finer filtration improves the cleanliness level of the hydrau-
lic fluid, which increases the service life of the axial piston
unit.
A cleanliness level of at least 20/18/15 is to be maintained
according to ISO 4406.
At very high hydraulic fluid temperatures (195°F (90°C) to
maximum 217°F (103°C), measured at port T), a cleanli-
ness level of at least 19/17/14 according to ISO 4406 is
necessary.
Influence of case pressure on beginning of control
An increase in case pressure affects the beginning of con-
trol when using the following control options:
▶ HP, HA.T3: Increase
▶ DA: Decrease
With the following settings, an increase in case pressure
will have no effect on the beginning of control:
HA.R and HA.U, EP, HA
The factory setting of the beginning of control is made at
p
abs
= 30psi (2bar) case pressure.
Flow direction
Direction of rotation, viewed on drive shaft
clockwise (cw) counter-clockwise (ccw)
A to B B to A
Shaft seal
Permissible pressure loading
The service life of the shaft seal will be influenced by the
speed of the axial piston unit and the leakage pressure in
the housing (case pressure). Momentary pressure spikes
(t<0.1s) of up to 145psi (10bar) are permitted. The
service life of the shaft seal decreases with increasing
frequency of pressure spikes and increasing mean differen-
tial pressure.
The case pressure must be equal to or higher than the
ambient pressure.
0
15 (1)
30 (2)
45 (3)
60 (4)
75 (5)
2000 4000 6000 8000 10000
NG170, 215
NG85
NG60
NG115, 150
NG170
NG60
NG85
NG115NG150
NG215
Differential pressure Δp [psi (bar)]
Rotational speed n [rpm]
The FKM shaft seal may be used for leakage temperatures
from -13°Fto+240°F(-25°Cto+115°C). For application
cases below -13°F(-25°C), an NBR shaft seal is required
(permissible temperature range:
-40°Fto+195°F(-40°Cto +90°C)).

Bosch Rexroth A6VM series 71 Specifications

General

Brand	Bosch
Model	Rexroth A6VM series 71
Category	Engine
Language	English