2-15-22. Parking

Figure 2-15-3. Accumulators Precharge Limits

TM-1-1520-240-10 Army CH-47D Heilcopter (EIC:RCD) Manual
Page Navigation
111

TM 1-1520-240-10 2-15-16 (2) Press and hold the depressurization valve on the APU start module accumulator until system pres- sure is depleted. When the accumulator has been de- pressurized, return the handle of the UTILITY RES- ERVOIR DEPRESSURIZE valve to NORMAL. (3) Not precharge on accumulators and ensure is within limits as per figure 2-15-3. (4) If servicing is required, refer to TM 55-1520-240-23. b. The power steering and swivel lock accumulator is located on the right side of the cabin, in the cargo ramp area. Determine accumulator precharge as follows: NOTE An alternate method is to apply external pow- er to the helicopter and cycling the STEER- ING CONTROL SWIVEL STEER switch on the center console from LOCK to UNLOCK several times. (1) Depressurize the accumulator by starting the APU and placing the APU GEN switch to ON. (2) Place the HYD BRK STEER isolation switch on the overhead switch panel to OFF. Cycle the STEER- ING CONTROL SWIVEL STEER switch on the center console from LOCK to UNLOCK approximately six times. (3) Note precharge on accumulator and ensure precharge is within limits as per figure 2-15-3. (4) If servicing is required, refer to TM 55-1520-240-23. c. The brake accumulator is located within the aft left side of the forward transmission fairing. Determine accumulator precharge as follows: (1) Depressurize the accumulator by pressing the brakes approximately four times or until it becomes hard to apply the brakes. (2) Accumulator precharge should read be- tween 600 and 850 psi. (3) If servicing is required refer to TM 55-1520-240-23. 2-15-21. Ground Handling (Towing). Refer to TM 55-1520-240-23. 2-15-22. Parking. Park helicopter as directed in the following steps: a. Apply wheel brakes. Then, set the parking bra- kes. b. Place chocks as required. CAUTION Failure to position blades properly can al- low a blade to hit the fuselage. This may damage the fuselage and blade. c. Position rotary-wing blades 30_ off centerline of helicopter. d. Unplug the battery after the last flight of the day.

Privacy Statement
Press Release
Contact