MTS Series 215 Rotary Actuator - Manual (Page 61)

Routine Maintenance
Series 215 Rotary Actuator Product Manual Maintenance 61
Maintenance
This section contains information regarding routine maintenance, problem
diagnosis, actuator seal replacement, and actuator disassembly.
Procedures in this section assume that the operator is familiar with all operating
aspects of the system electronic console and all interlock restrictions that apply to
the hydromechanical equipment.
Routine Maintenance
Series 215 Rotary Actuators are designed for extended periods of operation
without extensive maintenance requirements. A summary of the routine
maintenance procedures is listed below. The following subsections describe the
recommended procedures.
Weekly Clean exposed areas of the actuator rotor with a clean, dry, lint-free rag. If the
actuator is continually exposed to a dirty operating environment, clean the rotor
on a daily basis.
Monthly
Inspect actuator rotor and seals for excessive wear or leakage. Small scratches in
the torsional direction of the rotor or polishing of the rotor surface is considered
normal operating wear.
Yearly
Change actuator seals if necessary. Actuator assemblies may require more or less
frequent seal changes depending on usage. External oil leakage or decreased
performance are indicators of seal wear.
Actuator Performance Checks
The following procedure is designed to help determine the cause of abnormal
actuator operation by checking specific actuator performance benchmarks. The
previous figure shows the components of the Series 215 Rotary Actuator.
1. Perform the servovalve mechanical null procedure. (Refer to the appropriate
servovalve product manual for this procedure.)
2. Turn off system hydraulic pressure and ensure that all residual pressure
(including service manifold accumulator pressure) has bled off.
3. Attach a flow meter to the return line (from the servovalve).
4. Run actuator hard over clockwise (viewed from shaft end) and increase
pressure to 21MPa (3000 psi).
5. Measured cross vane flow values should not exceed:
• 1 gpm for 215.32/35 actuators
• 2 gpm for 215.41/42 actuators
• 3 gpm for 215.45/51 actuators
6. Repeat Steps 4 and 5 in the counterclockwise direction.