MTS Model 293-22 Hydraulic Service Manifold - Manual (Page 37)

• The Model 293.22B contains 115 VAC control power. The 3-pin DIN connector for the high/low solenoids
is shown below.
Pin Assignments for High/Low Solenoid Connectors
System Checks
Complete the following steps to ensure proper HSM installation.
1. Check the HSM for secure mounting.
2. Check all hydraulic connections according to the system diagrams. Ensure that the connections are
secure.
3. Check all electrical cable connections (where applicable) according to the system diagrams. Ensure
that the connections are correctly mated and locked.
4. Precharge the accumulators. The procedure for precharging accumulators manufactured by MTS
Systems Corporation can be found in the Series 111 Accumulator Product Information manual. For
accumulators not manufactured by MTS Systems Corporation, refer to the vendor literature for that
accumulator.
5. Check to see if you have installed a shut-off valve and lock-out tag on each HSM to ensure that HPU
pressure is not applied to an HSM being serviced. Remember that pilot pressure is present whenever
there is supply pressure even if the HSM is off.
6. Apply low pressure. Check for leaks at all hose connections and on the HSM. With pressure turned off,
tighten fittings as necessary. Apply high pressure and check again for leaks.
7. Apply high pressure and operate the system for at least ten minutes to bleed air from the system.
8. Check the setting of the low and high pressure output levels. Check the ramp time between low and
high pressure levels.
9. Turn off hydraulic and electrical power.
10. Check the HPU fluid level.
Model 293.22 Hydraulic Service Manifold | 37
Installation