Quantcast PROPELLER SHAFT ASSEMBLY EXPANDER TUBE BRAKE

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TM 55-1905-223-24-18-2
Table 3-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ROTARY WINDOW - CONT
STEP 6. Check for 115 Vdc across pins D and E on screen power connector on junction box.
If voltage is not present, power cable from control box to screen is defective. Replace
power cable (para. 3-193).
STEP 7. Turn HEATER switch ON, check for 115 Vac across terminals 5 and 6.
If voltage is not present, heater switch is defective. Replace heater switch (para. 3-193).
STEP 8. Check for 115 Vac across pins B and C on screen power connector on junction box.
If voltage is not present, power cable from control box to screen is defective. Replace
power cable (para. 3-193).
PROPELLER SHAFT ASSEMBLY
EXPANDER TUBE BRAKE
59. Shaft brake will not engage.
STEP 1. Check for lack of air supply to quick release exhaust valve on brake.
Check control 125 psi air pressure to shaft brake. Refer to TM 55-1905-223-10.
STEP 2. Check condition of quick release exhaust valve.
Replace quick release exhaust valve. Refer to paragraph 3-204.
STEP 3. Inspect rubber actuating tube for cracks, cuts or swelling.
Replace tube if cracked, cut or swollen. Refer to paragraph 3-204.
STEP 4. Defective brake panel.
Refer to brake panel troubleshooting (Table 2-2).
60. Shaft brake will not disengage.
STEP 1. Check quick release exhaust valve for damage.
Replace quick release exhaust valve. Refer to paragraph 3-204.
61. Shaft brake drags (will not disengage fully).
STEP 1. Check to see if friction shoes do not retract fully.
Replace contaminated quick release exhaust valve. Refer to paragraph 3-204.
STEP 2. Inspect flat release springs for broken ones.
Replace broken flat release springs.
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