Pressure Ratings; Speed Ratings - Sauer Danfoss 40 Series Technical Information

PRessuRe RatinGs

sPeeD RatinGs

14
Series 40 Axial Piston Pumps
Technical Information
Operating parameters
The table, Operating parameters, page 11, gives maximum and continuous pressure
ratings for each displacement. Not all displacements operate under the same pressure
limits. Definitions of the operating pressure limits appear below.
system pressure is the differential pressure between system ports A and B. It is the
dominant operating variable affecting hydraulic unit life. High system pressure, which
results from high load, reduces expected life. Maintain system pressure at or below
continuous working pressure during normal operation to achieve expected life.
Continuous working pressure is the average, regularly occurring operating pressure.
Operate at or below continuous working pressure for satisfactory product life.
maximum (peak) working pressure is the highest intermittent pressure allowed. Do
not allow machine load to exceed maximum (peak) working pressure.
All pressure limits are differential pressures referenced to low loop (charge) pressure.
Subtract low loop pressure from gauge readings to compute the differential.
System pressure limits
Pressure Limits bar
Continuous 210
Maximum 345
The table, Operating parameters, page 11, gives rated and maximum speeds for each
displacement. Not all displacements operate under the same speed limits. Definitions of
these speed limits appear below.
Continuous speed is the maximum recommended operating speed at full power
condition. Operating at or below this speed should yield satisfactory product life. Do not
exceed maximum motor speed during unloaded, on-road travel over level ground.
maximum speed is the highest operating speed permitted. Exceeding maximum speed
reduces pump life and can cause loss of hydrostatic power and braking capacity. Never
exceed the maximum speed limit under any operating conditions.
W Warning
unintended vehicle or machine movement hazard.
The loss of hydrostatic drive line power, in any mode of operation (forward, neutral, or
reverse) may cause the system to lose hydrostatic braking capacity.You must provide a
braking system, redundant to the hydrostatic transmission, sufficient to stop and hold
the vehicle or machine in the event of hydrostatic drive power loss.
520L0635 • Rev EH • June 2009
psi
3000
5000