TM 55-4920-328-13 Section XIII.  T74 TURBOPROP POWER ABSORPTION SYSTEM MAINTENANCE 6-51.  Scope. Maintenance  of  the  T74  power  absorption  system consists of disassembly, cleaning, inspection, replacement    of    defective    parts,    and    reassembly    of certain  parts  of  the  water  brake  assembly  and  torque element assembly at each 500 hours of operation. NOTE At  1,000  hours  of  operation,  the water   brake   assembly   must   be overhauled by depot level personnel. 6-52.        T74    Turboprop    Water    Brake    Assembly Maintenance. Proceed as follows: a. Remove  all  external  components  called  out  in Figure 6-14. b. Inspect  thermocouple  assemblies  (12,  27  and 28)   for   broken   connectors,   corroded   electrical   pins, frayed    cables,    damaged    mounting    connectors    and corroded   pins   or   probes.      Replace   the   thermocouple assembly if found to be defective. c. Inspect  hose  assemblies  (2,  15,  21  and  26)  for dents,     cracks,     sharp     bends,     thread     damage     and corrosion.      Replace   tube   assembly   if   found   to   be defective. d. Inspect valve (40) for dents, leaks and corrosion.  Replace if defective. e. Inspect all remaining components; tees, unions, nipples,    plugs,    etc.,    for    cracks,    dents,    leakage    or corrosion.  Replace if defective. f. Re-install all components removed in step a . 6-53.  T74 Turboprop Torque Element Maintenance. If the torque element assembly cannot be calibrated, proceed as follows: a. Remove the compound from the potentiometers and clean with Specification BB-F-1421 freon. b. Check  the  continuity  through  the  signal  cable assembly   and   potentiometers   using   figure   6-9   as   a guide. c. If  the  torque  element  signal  cable  assembly  is defective,  replace  the  cable  or  connector,  as  required. Proceed as follows: (1) Disconnect    the    cable    from    the    torque element body. (2) Remove the connector from the cable. (3) Procure   a   20-foot   length   of   WH67896 cable (Schaevitz Bytrex, Waltham, Massachusetts). (4) 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 required. (5) Connect  the  lead  shield  to  the  connector clamp. (6) Connect   the   opposite   end   of   the   cable assembly  to  the  torque  element  terminals.    (See  figure 6-9). (7) Apply    DC-4    compound    (Dow    Corning Corp,     Midland,     Michigan)     to     the     torque     element terminals. 6-38