Manual 25805
3 & 5 HP Governor Test Stand
Woodward
19
Air from the vacuum generator is exhausted to the table drain area. Oil from the
exhaust tube is an indication of an oil leak in the governor being tested. The
vacuum generator may be removed from the stand and washed with ordinary
shop solvents. Disassembly of the generator should not be necessary.
The vacuum accessory is designed to provide the vacuum needed to check
limiters and lube-oil vacuum trips. The vacuum accessory is not designed to
move oil or help in keeping the test stand clean and must not be used for this
purpose, as excessive dirt or oil will plug the orifice in the venturi vacuum pump.
Variable DC Power Supply (8272-618)
The variable power supply provides 10 to 140 Vdc power to permit testing
electric speed-setting and solenoid devices used on many governors. The power
supply is necessary to use the PGE (rail governor) switch set which mounts on
the operator control panel. The device may also be used to test the mechanical
side of EGB units.
Figure 4-2. Variable DC Power Supply
Located in the center of the back panel, the optional device converts 110 Vac
power to dc voltage. A three-position switch provides variable dc output up to 140
Vdc to the optional PGE switch set when in the up (Internal) position. In the
center position, no voltage is available from the dc option. In the lower (external)
position, the output of the option is between 10 and 140 Vdc as set with the
potentiometer and read on the digital voltmeter.
The external output is available only at the (+) and (–) jacks on the back panel,
and no voltage is available from the switch set. A 2.5 A fuse protects the dc
supply.
110 Volt Plug
A 110 V, single-outlet plug is provided on the side of the test stand for the
convenience of the operator. The plug is protected by a 3 A "SloBlo" fuse.