Section XIV. T73 POWER ABSORPTION SYSTEM MAINTENANCE
Maintenance of the T73 power absorption system
consists of cleaning, inspection, and replacement of
certain parts of the water brake assembly and the torque
element assembly at 250 hours of operation.
At 1,000 hours of operation, the
water brake assembly must be
6-56. T73 Water Brake Assembly Maintenance.
Use figure 6-15 as a guide. Proceed as follows:
Place the water brake assembly on a suitable
fixture and allow the residual water to drain from the
Remove thermocouple assemblies (6) and
adapters. Inspect for broken connectors, corroded
electrical pins and probe, frayed cable and cracked or
corroded adapter. Replace thermocouple assembly and
adapter if found defective.
Inspect check valve (3) and valved nipples (5,
8, 11, 21) for dents, cracks, sharp bends, evidence of
leakage and thread damage. Replace if found
Inspect all remaining components, bushings,
reducers, nipples, couplings and adapters for dents,
cracks,, and corrosion. Replace if found to be defective.
Re-install all components in accordance with
6-56. T73 Torque Element Maintenance.
If the torque element assembly malfunctions or
cannot be brought into calibration, proceed as follows:
Remove the compound from the potentiometers
and clean with Specification BB-F-1421 freon.
Check the continuity through the signal cable
assembly and potentiometers, using figure 6-9 as a
If the torque element signal cable is defective,
replace the cable or connector, as required. Proceed as
Disconnect the cable from the torque
Remove the connector from the v cable.
Procure a 20-foot length of WH67896
cable (Schaevitz Bytrex, Waltham, Massachusetts).
Solder the leads to the connector using
Specification QQ-S-571 60/40 resin core solder. Use a
new MS3106B-14S-5P connector, if replacement is
Connect the lead shield to the connector
Connect the opposite end of the cable
assembly to the torque element terminals. (See figure
Apply DC-4 compound (Dow Corning
Corp, Midland, Michigan) to the torque element
KEY TO FIGURE 6-15.
1. Adapter Assembly
3. Check Valve
5. Valved Nipple
6. Thermocouple Assembly
7. Thermocouple Adapter
8. Valved Nipple
11. Valved Nipple
16. Coupling Half
17. Coupling Half
18. Coupling Half
21. Valved Nipple
22. Coupling Half
24. Manifold Adapter
28. Bearing Assembly
32. Rear Housing