Vacuum System - Piper SEMINOLE PA-44-180 Information Manual

PA-44-180, SEMINOLE
A vacuum regulator is provided in the system to protect the gyros. The
valve is set so the normal vacuum reads 4.8 to 5.2 inches of mercury, a setting
which provides sufficient vacuum to operate all the gyros at their rated RPM.
Higher settings will damage the gyros and with a low setting the gyros will be
unreliable. A regulator is located adjacent to each pump.
1
2
5
ISSUED: JULY 12, 1995
3
4
6

VACUUM SYSTEM

Figure 7-27
DESCR/OPERATION
1. PUMP
2. REGULATOR
3. VACUUM GAUGE
4. ATTITUDE GYRO
5. MANIFOLD CHECK VALVE
6. FILTER
REPORT: VB-1616
SECTION 7
2
1
7-27