Constant Speed Drive Pressure Fill Valve Locations 500
12-13-21 Figure 201 Nov 15/69
Page 202
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(2)
Stop pumping when oil appears in the bottom of sight gage and wait approximately five minutes for oil level to stabilize. Oil level will rise when drive is warm.
CAUTION: DO NOT TOP OFF OIL LEVEL AFTER MOTORING. MOTORING DOES NOT CONSTITUTE A COMPLETE OPERATIONAL RUN OF THE DRIVE. OIL MAY BE HELD IN OPERATIONAL RESERVOIR, RESULTING IN A LOW READING ON SIGHT GAGE. ADDITION OF OIL CAN CAUSE OVERFILLING WITH CONSEQUENT OVERHEAT AND SLUDGING CONDITIONS. DO NOT OVERFILL.
(3)
Check oil level and add or drain as required to obtain correct level.
NOTE: Low oil level in drive case reservoir may be caused by leaks at CSD input shaft seal. Check input spline cavity oil level. If excessive oil is found in spline cavity, this would indicate a defective seal.
4. Service Constant Speed Drive Wet Pad Input Spline Cavity
A. Service Wet Pad Input Spline Cavity On CSD (Fig. 201)
(1) Check oil level in the input spline cavity by removing pressure seal fitting cap on engine gearbox and allow oil to flow from standpipe indicator inside the cavity. When oil stops flowing spline cavity is filled to proper level. If excessive oil flows at this check either CSD or engine seals are leaking and oil is entering input spline cavity.
WARNING: USE EXTREME CARE WHEN DRAINING CSD OIL OR REMOVING CSD COMPONENTS. HOT OIL CAN CAUSE INJURY.
PROLONGED CONTACT WITH CSD OIL CAN CAUSE DERMATITIS. OIL WILL STAIN CLOTHING AND CAN SOFTEN PAINT.
(2)
To bring oil to overflow level, pump oil from service cart through spline cavity fill check valve on CSD until it begins to flow from the standpipe indicator.
NOTE: Approximately 35 psi is required to force oil thru the CSD fill check valve into the spline cavity.
(3)
Allow excess oil to flow from standpipe, then replace pressure seal fitting cap on engine gear case and tighten to 40-50 pound-inches.
NOTE: The wet pad spline cavity may be drained by removing the entire fill check valve assembly from the CSD.
(4)
Disconnect oil pump connection from spline cavity fill check valve on CSD and replace cap.
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12-13-21 Page 203
APU OIL TANK – SERVICING
1. General
A. This section covers topping-off of the APU oil tank. A separate procedure, 49-91-31, Oil Tank -Unit Servicing, covers draining and filling of oil tank with same brand of oil and draining and filling of oil tank with different brands of oil.
B Topping-off is an approved method of changing to a different approved oil, by replenishing oil in the reservoir through routine oil servicing without any draining or flushing. This method should only be used for changing approved oil brands conforming to the same oil specification.
2. Equipment and Materials
A. Cleaning Solvent -Federal Specification P-D-680 (Ref 20-30-31)
B. Turbine Engine Lubricating Oil -(Ref 20-30-21)
(1)
Lubricant Specification MIL-L-7808
(a)
Aeroshell Turbine Oil 390
(b)
Brayco 880 Conojet
(c)
Brayco 880H
(d)
B.P. Aero Turbine Oil 15
(e)
Castrol 3C
(f)
Castrol 325
(2)
Lubricant Specification MIL-L-23699A
(a)
Aeroshell Turbine Oil 500
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