Recommended Charge Pressure - Bosch Rexroth Hägglunds CA Series Installation And Maintenance Manual

Bosch Rexroth Mellansel AB, Installation and maintenance manual, Hägglunds CA 10 - CA 40, RE 15354-WA/04.2015

15.1.2 Recommended charge pressure

Hanging load falls down!
Danger to life, risk of injury or damage to equipment, in hanging load applications!
▶ Charge pressure at motors connection must be according to recommended
pressure under all conditions, see Fig. 22: Recommended charge pressure - CA
10 - CA 40 motors 2-port connection. Valid for oil viscosity 40 cSt and Fig. 23:
Recommended charge pressure - CA 10 - CA 40 motors 4-port connection. Valid for
oil viscosity 40 cSt..
▶ Changes to the factory settings must only be made by Bosch Rexroth specialist
personnel.
The hydraulic system must be such that the motor will recieve sufficient charge
pressure at the low-pressure port. This applies to all types of installations.
There are two distinct cases:
The motor operating in braking mode.
Required charge pressure at the inlet port is according to Fig. 22: Recommended
charge pressure - CA 10 - CA 40 motors 2-port connection. Valid for oil viscosity 40 cSt
and Fig. 23: Recommended charge pressure - CA 10 - CA 40 motors 4-port connection.
Valid for oil viscosity 40 cSt..
The motor operating in driving mode only
For CAB 10 - CAB 40, 2-port or 4-port connected motors. The pressure at the low-
pressure port, p , should , during operation of the motor, be at least one bar above
low
the case pressure, p . That is
case
p = p + 1 [bar], during operation.
low case
p = p + 14.5 [psi], during operation.
low case
NOTE!
The diagrams are valid for 1 bar (14.5 psi) case pressure. With increasing
case pressure the charge pressure must be increased accordingly. See Fig. 22:
Recommended charge pressure - CA 10 - CA 40 motors 2-port connection. Valid
for oil viscosity 40 cSt and Fig. 23: Recommended charge pressure - CA 10 - CA 40
motors 4-port connection. Valid for oil viscosity 40 cSt..
DANGER
Technical data 43/52