The hose burst test stand, shown in figure 5-18, is manufactured by CGS Scientific Corporation. This test stand provides a means for pressure testing of aircraft hose assemblies of various lengths and sizes. Hydraulic pressure up to 15,000 psi and pneumatic pressure up to 1,500 psi are available for the testing of the hoses. The test stand is a completely self-contained unit mounted on legs that permits bolting to the deck. Access doors and removable panels provide easy access to all components for maintenance. Figure 5-19 shows the controls and instruments, and table 5-7 lists the functions of each. You should be familiar with these controls and

1. AIR SUPPLY SHUTOFF VALVE. 
2. HIGH-PRESSURE AIR GAUGE (0-2,000 psi). 
3.  REGULATED AIR PRESSURE GAUGE (0-160 psi). 
4. SELECTOR VALVE, REGULATED AIR TO OIL BOOSTER PUMP OR AIR BOOSTYER PUMP.
5. HIGH-PRESSURE OIL GAUGE (0-20,000 psi). 
6. HIGH PRESSURE OIL GAUGE (0-2,000 psi). 
7. GAUGE SHUTOFF VALVE. 
8. MANIFOLD BLEED VALVE. 
9. MANIFOLD BYPASS VALVE.
10. SIGHT GAUGE.
11. AIR BOOSTER INLET VALVE.
12. AIR PRESSURE REGULATOR.
13. AIR BOOSTER SHUTOFF VALVE.
14. HIGH-PRESSURE AIR BLEED VALVE.
15. WATER SHUTOFF VALVE

Figure 5-19.Controls and instruments.

Table 5-7.Functions of Controls and Instruments

instruments before using the test stand. To operate the hose burst test stand (CGS Scientific), follow the procedures listed below.

Before you perform the following preliminary adjustments, ensure that the air and electrical systems are energized. Check the reservoir oil level. If the reservoir is not full, add hydraulic oil. Make sure that the manifold bypass valve is closed. Open the manifold bleed valve. Make sure that the air booster inlet valve is closed. Make sure that the high-pressure air bleed valve is closed. Set the air pressure regula-tor for minimum pressure (fully counterclockwise). Turn on the gauge shutoff valve. Set red follower needles on the gauges to zero.