BS ISO 12333:2000

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

Identifies general specifications for constant displacement hydraulic motors in aircraft, which transform hydraulic power into mechanical energy in the form of rotational torque to 35 000 kPa systems. Covers primary and secondary function motors; Does not cover actuators having internal rotation angle limits and low-speed motors.