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Axial piston units
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Safety instructions
Bosch Rexroth AG, RE 90300-B/2021-01-19
WARNING
Overloading of the axial piston motor!
Risk of injury or property damage!
When using the axial piston motor in winch drives it may, when extremely
overloaded (e.g., if the maximum permissible rotational speeds are exceeded
during weighing of the anchor while the ship is in motion), cause the rotary group
to be damaged and, in the worst case, the axial piston motor may burst.
▶ Ensure that the technical limit values are not exceeded in any operating
conditions.
▶ Check whether any additional measures are needed for your machine/system
(up to an encapsulation) in order to avoid any hazard to persons. If necessary,
make sure that these are properly implemented.
▶ For safety reasons, axial piston variable motors with beginning of control at
V
g min
(e.g. HA) are not permissible for winch drives (e.g. anchor winches).
Restriction of control function!
Risk of injury or property damage!
Under certain circumstances, moving parts in control equipment
(e.g., valve spools) can get stuck in an undefined position due to contamination
(e.g., impure hydraulic fluid, abrasion or residual dirt from components).
As a result, the hydraulic fluid flow and the build-up of torque in the axial piston
unit can no longer respond correctly to the operator’s specifications. Even the use
of various filter elements (external or internal flow filtration) will not rule out a fault
but merely reduce the risk.
▶ Check whether your application requires remedial measures on your machine in
order to bring the driven consumer to a safe position (e.g. safe stop).
▶ If necessary, make sure these are appropriately implemented.
Limitation of load-holding function in lifting winches!
Risk of injury or property damage!
Moving parts in high-pressure relief valves may in certain circumstances become
stuck in an undefined position due to contamination (e.g. impure hydraulic fluid).
This can result in restriction or loss of load-holding functions in lifting winches.
▶ Check whether the application on your machine requires additional safety
measures in order to keep the load in a safe position.
▶ If necessary, make sure these are appropriately implemented.
