NOTE: When adjusted in this manner, the oil quantity indicator displays the useable quantity of oil in the tank. The remaining 1.3 gallons is not available to the engine and is not measured by the indicator.
(j)
Disconnect the two banana plugs and the coaxial BNC from the box in the center of the "T" cable.
(k)
Switch the FUNCT switch on the tester to SIM TU & COMP position. Readjust the "E" screw if it is necessary to cause the pointer to read 0 gallons.
(l)
Finish the servicing procedure for the engine oil tank (Ref 12-13-1/201).
(m)
Pull the circuit breaker C280 or C281 on the P6 Load Control Panel for the oil quantity indicating system being adjusted. Turn the tester to OFF and disconnect the tester from the "T" cable and the airframe ground.
(n)
Disconnect the "T" cable from the indicator and the aircraft wiring. Reconnect the two banana plugs and the coaxial BNC connector at the center of the "T" cable.
(o)
Reconnect the indicator to the airplane wiring. Close the circuit breaker on the P6 panel and verify that the oil quantity indicator reads 3.5 gallons. Return the panel lighting to the normal level.
(p)
Close the left cowl panel (Ref 71-11-11 R/I) and remove the power from the airplane if it is no longer needed.
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B. Adjust the indicator with the oil drained from the tank at a temperature below 100° (38°C).
(1) Equipment and Materials
(a)
PSD60-1, Simmonds Precision Capacitance Tester, Simmonds Precision Product, Support Division, 5250 N.W. 23rd Ave., Ft. Lauderdale, Florida 33309
(b)
PSD40-503 "T" cable, Simmonds Precision Product, Support Division, 5250 N.W. 23rd Ave., Ft. Lauderdale, Florida 33309
(c)
Tester grounding cable, banana plug to alligator clip
(d)
Approved engine oil
(e)
Container, 6-gallon capacity for oil
79-31-02 Feb 20/92
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(2) Prepare Oil Quantity Indicating System for Adjustment
(a)
Open the left cowl panel (Ref 71-11-11 R/I).
(b)
Put a container under the oil tank drain valve. Open the oil tank drain valve and allow oil to drain for 5 minutes. Close drain valve.
(c)
If engine has been shut down for more than 30 minutes, put a container under the engine gearbox and remove the engine gearbox drain plugs to assure complete drainage. Replace plugs and lockwire after draining.
(d)
Pull circuit breaker C280 or C281 on the P6 Load Control Panel to remove power from the oil quantity system to be adjusted. Turn panel lighting OFF.
(e)
Turn the PSD60-1 tester on and allow it to warm up for 3\minutes.
(f)
Connect the tester CHASSIS jack to a good airframe ground (seat rail) using the grounding cable provided with the tester. Verify that the banana plugs and the coaxial BNC connector on the box at the center of the "T" cable are connected.
(g)
Remove the indicator for the tank to be calibrated from the panel. Disconnect the aircraft wiring plug from the indicator.
(h)
Connect the PSD40-503 "T" cable to the wiring plug and the indicator. Connect the "T" cable coaxial lead marked "H" to the tester terminal marked INDICATOR-HIZ. Connect the "T" cable lead marked "T" to INDICATOR-LOZ, and the lead marked "C" to INDICATOR-COMP.
(i)
Select MEASURE INT on FUNCT switch of the tester. Select COMP with the SELECT switch. Adjust COMP SIMULATOR knob on the tester to read 108.9 pf on the LCD display. This is the nominal capacitance for a full tank.
(j)
Change the SELECT switch to the TU position. Adjust the TU SIMULATOR knob to read 22.3 pf on the LCD display. This is the nominal capacitance for an empty tank.
(k)
Put the tester FUNCT switch in the SIM TU & COMP position.
(l)
Disconnect the two banana plugs and one coaxial BNC connector from the box in the center of the "T" cable. This disconnects the tank unit.
Feb 20/92 79-31-02
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(3) Adjust the oil quantity indicating system EMPTY and FULL.
(a)
Close the circuit breaker on the P6 Load Control Panel to provide power to the oil quantity indicator.
(b)
Adjust the screw marked "E" on the back of the oil quantity indicator until the pointer reads 0 gallons. Press the OIL QTY TEST switch on the center instruments panel momentarily and release. Readjust the "E" screw if it is necessary to make the pointer read 0 gallons.
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