MTS Model 293-22 Hydraulic Service Manifold - Manual (Page 50)

Precharge Accumulator
0.35 MPa (50 psi) 4 Return
7 MPa (1000 psi) Pilot pressure
1.4 MPa (200 psi) Slow turn-on
Record both the pressure and the room temperature in a log book. Use these readings as a basis for
changing the interval between pressure checks. Initially, check the precharge after two weeks or 100
operating hours:
• If there is a change of ±1.4 MPa (±200 psi) or more in the pressure line accumulator, check the precharge
every week or 50 operating hours.
• If there is a change of less than ±1.4 MPa (±200 psi) in the pressure line accumulator, check the
precharge every four weeks or 200 operating hours.
• If there is a ±50% or more change in the return, pilot pressure, or slow turn-on accumulators, check
the precharge every week or 50 operating hours.
• If there is a change of less than ±50% in the return, pilot pressure, or slow turn-on accumulators, check
the precharge every four weeks or 200 operating hours.
See the Series 111 Accumulator Product Information manual (MTS part number 011-553-304) for
maintenance procedures.
4 For optimum performance, set the precharge within this range as close as possible to the low-pressure
setting (2.8 MPa; 400 psi minimum).
50 | Model 293.22 Hydraulic Service Manifold
Maintenance