MTS Model 506-62-72 Hydraulic Power Supply - Manual (Page 35)

Theory of Operation 5-1
Section 5
Theory of Operation
This section describes the hydraulic and electrical operation of Model
506.62/.72 Hydraulic Power Supply (HPS).
5.1 Hydraulic Operation
The figure below shows a block diagram of the HPS hydraulic operation.
High-Pressure
Filter
10-micron
Low-Inlet
Pressure
Switch
Filter
Bypass
Pressure
-20 JIC
Back-up
Relief Valve
Fluid-Level and
Temperature
Gage
TS-C133B
Heat
Exchanger
Output
Pressure
Gage
3500 psi
Pressure
-24 4 Bolt
2 SOL
24 Vdc
Low-Pressure
Fine Filter
3-micron
ER
In
Out
Check
Valve
Main Pump
set
compensator
at 3025 psi
Main Manifold
Assembly
Return
-20 JIC
Return
-24 4 Bolt
Filter Pressure
Switch 2 PS
Supercharge
Relief Valve
preset to crack
at 30 psi
Supercharge and
Filter Manifold
Optional
Water
Control
Valve
Supercharge
Pump
Water-Control
Valve Temperature
Switch
Low-Level
Float
Switch
Over-Temperature
Switch
Pressure
Accumulator
set at 115
°
rising set at 140
°
rising
-16 JIC
Drain
-12 JIC
-12 JIC
35
psi
1PS
M
M
1 Sol
Bleed-down
Orifice
Slow Turn-on
Accumulator
Figure 5-1. Hydraulic Block Diagram