Foreword
1 Scope
2 Normative references
3 Classification
4 Functional requirements
4.1 Hydraulic fluid
4.2 Pressures
4.2.1 Rated supply pressure
4.2.2 Rated differential pressure
4.2.3 No-load break-out pressure
4.2.4 Rated case-drain port pressure
4.2.5 Case and return port proof pressure
4.2.6 Inlet port proof pressure
4.2.7 Inlet port burst pressure
4.3 Rated temperature
4.4 Rated displacement
4.5 Rated consumption
4.6 Leakage
4.6.1 Case drain flow
4.6.2 Shaft seal leakage
4.6.3 External leakage
4.7 Speed and direction of rotation
4.7.1 Direction of rotation
4.7.2 Rated speed
4.7.3 Overspeed
4.7.4 Maximum no-load speed
4.8 Torque
4.8.1 Rated torque
4.8.2 Break-out torque
4.8.3 Stalling torque
4.8.4 Torque pulsations
4.9 Efficiency
4.10 Dynamic characteristics
4.11 Dynamic braking
4.12 Rapid reversals
4.13 Passive operation
4.14 Noise level
4.15 Rated endurance
5 Installation
5.1 Dimensions
5.2 Mass
5.3 Mounting
5.4 Drive
5.5 Ports
6 Construction
6.1 Materials
6.2 Metals
6.2.1 General
6.2.2 Motors for Type I systems
6.2.3 Motors for Type II and Type III systems
6.2.4 Ferrous, copper and aluminium alloys
6.3 Castings
6.4 Corrosive-prevention treatment
6.5 Seals
6.6 Lubrication
6.7 Balance
6.8 Parts with critical installation direction
6.9 Self-contained failure
6.10 Marking
6.10.1 Nameplate
6.10.2 Fluid identification
6.11 Seal of guarantee
7 Maintainability
7.1 Maintainability features
7.2 Maintenance concept
7.3 Service life limit and storage specifications
8 Reliability
8.1 Equipment compliance
8.2 Specifications
9 Quality assurance provisions
9.1 Responsibility for inspection
9.2 Classification of tests
10 Qualification tests
10.1 Purpose
10.2 Qualification procedures
10.2.1 Detail specification
10.2.2 Qualification by analogy
10.2.3 Motor qualification test report
10.3 Qualification testing
10.3.1 General conditions
10.3.2 Dimensional check
10.3.3 Environmental conditions
10.3.4 Test sequence
10.3.5 Static proof pressure tests
10.3.6 Static burst pressure test
10.3.7 Overspeed test
10.3.8 Operational test at overpressure
10.3.9 Calibration
10.3.9.1 General
10.3.9.2 Torque and flow rate
10.3.9.3 Dynamic braking
10.3.9.4 Rapid reversals
10.3.9.5 Passive operation
10.3.9.6 Break-out torque
10.3.9.7 Stalling torque and internal
leakage
10.3.10 Low-temperature tests
10.3.11 Thermal shock test
10.3.12 Endurance testing
10.3.12.1 General
10.3.12.2 Test sample
10.3.12.3 Hydraulic fluid
10.3.12.4 Leakage permissible during
endurance testing
10.3.12.4.1 Case tightness
10.3.12.4.2 Shaft seal
10.3.12.5 Start-stop tests
10.3.12.6 Filtration during endurance
testing
10.3.12.7 Filter checks
10.3.12.8 Part failure
10.3.12.9 Recalibration
10.3.13 Endurance in operation reversibility
(bi-directional motors only)
10.3.14 Vibration tests
10.3.14.1 Position of a motor under test
10.3.14.2 Motor operating during
vibration tests
10.3.14.3 Resonant-frequency vibration
10.3.14.4 Cyclic vibration
10.3.14.5 Other tests
10.3.15 Drive shaft shear test (if applicable)
10.3.16 Supplementary tests
11 Acceptance
11.1 General
11.2 Identification
11.3 Teardown inspection
11.4 Acceptance testing
11.4.1 General conditions
11.4.2 Test sequence
11.4.3 Running-in
11.4.4 Overspeed test
11.4.5 Operational test at overpressure
11.4.5.1 Inlet port proof pressure test
11.4.6 Operational tests at rated conditions
11.4.7 Inspection after testing
11.5 Performance data
11.6 External leakage check
11.7 Filter patch test
11.7.1 Filter sampling method
11.7.2 Patch preparation
11.7.3 Reference patch determination
11.7.4 Patch comparison
12 Storage and packaging