Section VIII. T53 TURBOSHAFT POWER ABSORPTION SYSTEM MAINTENANCE
Maintenance of the T53 turboshaft power absorption
system consists of cleaning, inspection, lubrication, and
assembly, and cleaning and repair of the torque element
after 500 hours of operation.
At 1,000 hours of operation, the water
brake assembly must be overhauled
by depot level personnel.
6-35. T53 Turboshaft Water Brake Assembly
accordance with the sequence of index numbers
assigned to figure 6-8 and as follows:
Remove all external components called out in
Inspect thermocouple assemblies (1 and 2) for
broken connectors, heavily corroded electrical pins,
damaged or corroded probes. Replace the entire
thermocouple assembly if damage is found.
Inspect tube assemblies (4, 11, 14, 15 and 16)
for dents, cracks, sharp bends, evidence of leakage and
thread damage. Replace the tube assembly if damage
Inspect valves (3 and 21) for dents, leaks and
corrosion. Replace if required.
Inspect all remaining components; tee's, unions,
nipples, plugs, etc., for cracks, dents, leakage or
corrosion and replace if damaged.
Re-install all components removed in step "a".
6-36. T53 Turboshaft Torque Element Maintenance.
Proceed as follows:
Remove the compound from the potentiometers
and clean with freon (Specification BBF-1 421).
Check the continuity through the signal cable
assembly and the potentiometers, using figure 6-9 as a
If the torque element signal cable assembly is
defective, replace as follows:
Disconnect the cable from the torque
Remove the connector from the cable.
Procure a 20-foot length of WH67896
cable (Schaevitz Bytrex, Inc, Waltham, Massach
Solder the leads to the connector using
Specification QQ-S-571, 60/40 resin core solder. Use a
new MS3106B-14S-5P connector if damage is noted at
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