MTS Hydraulic Power Unit Model 506-92 - Manual (Page 19)

Service 3-7
3 . 1 . 3 Accumulators
For more
information about
accumulators See the Series 111 Accumulator product manual (MTS part number 115533-
XX). For other accumulators, refer to the vendor literature or the
Procedure for Checking Piston and Bladder Type Accumulator Precharge
and Precharging (MTS part number 408266-XX).
pressure accumulator
slow turn-on
accumulator
pressure gage
back-up relief valve
filter drain
Figure 3-2. Location of Accumulators
3 . 1 . 3 . 1 Precharge Pressure-Checking Intervals
Pressure
Accumulator Precharge pressure of the pressure accumulator (Figure 3-2) must be
checked at regular intervals. To establish an interval time, follow this
procedure:
1. Initially, check the precharge pressure after 2 weeks or 100 operating
hours
.
2. If the pressure changes more than 200 psi, check the precharge
pressure every week or 50 operating hours.
If the pressure changes less than 200 psi, check the precharge
pressure every four weeks or 200 operating hours.