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Subtask 71-00-00-020-060
P. Loosen the forward engine mount bolts.
(1) Remove the bolts (100), the washers (105) and (115), and nuts (110) that attach the nut retainers (125). (Ref. Fig. 408/TASK 71-00-00-991-916)
(2) Cut and remove the lockwire or safety cable and loosen the bolts (85) as follows:
(a) Loosen one bolt. TORQUE again the bolt to between 12 and 18 m.daN
(88.49 and 132.74 lbf.ft) or to the maximum load that a mechanic can apply with a standard wrench.
(b) Apply this procedure on the three remaining bolts one by one. Subtask 71-00-00-480-060
Q. Installation of the booststrap system:
(1) Install BOOTSTRAP SYSTEM (98D71203500000) or BOOTSTRAP SYSTEM (98D71203501000) (Ref. Fig. 409/TASK 71-00-00-991-917)
(a) Install the rear beam (9) on the lower part of the pylon and attach with the ball pins (8).
(b) Install the spacer and the center hinge clamp (6) on the pyramid. Attach the spacer to the pyramid with the right and left clamps (7).
(c) Install the forward hinge arms (4) and (5) with the ball pins (3).
(d) Install the link (2) at the upper part of the hinge arms (4) and
(5) with the ball pins (1).
(e) Install the dynamometers and the chain pulley blocks.
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R Forward Engine Mount Figure 408/TASK 71-00-00-991-916
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Bootstrap Installation Figure 409/TASK 71-00-00-991-917- 12 (SHEET 1)
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Bootstrap Installation Figure 409/TASK 71-00-00-991-917- 22 (SHEET 2)
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(2) Install the engine cradle:
CAUTION : BE CAREFUL WHEN YOU INSTALL THE CRADLE ON, OR REMOVE IT
_______ FROM, THE ENGINE. IF NOT, YOU CAN CAUSE DAMAGE TO THE VIBRATION SENSOR CONNECTOR. THE VIBRATION SENSOR CONNECTOR IS IN FRONT OF THE FORWARD HANDLING POINT ON THE RIGHT SIDE.
(a) Put the ENGINE TROLLEY (S487ETT2) or ENGINE TROLLEY (TMHET06-00-00) together with the ENGINE CRADLE (S686CR56-5) or ENGINE CRADLE (TMHEC28-00-00), in position below the engine.
(3) Attach the chain hooks to the engine cradle.
(4) Release the pins that attach the engine cradle to the trolley and lift the engine cradle to the engine.
NOTE : Make the engine cradle level. To do this use the chain
____
pulleys.
(5) Put the pins of the front fixtures into the engine handling points and then install the rear support on the left side. Attach to the engine with a ball pin.
R NOTE : The pin of the rear support on the left side must be put in
____ R the lower hole of the engine bracket.
(6) Put the pins into each fixture. Then, at the same time, adjust the tension of the handling hoists so that you can read these values on the dynamometers : 1975 daN (4440 lbf) (2015 kg) for the forward dynamometers and 400 daN (900 lbf) (408 kg) for the aft dynamometers.
4. Procedure
_________
Subtask 71-00-00-020-061
A. Remove the bolts of the engine mounts
WARNING : DEATH OR SERIOUS INJURY MAY RESULT IF THE POWER PLANT FALLS ON
_______ THE PERSONNEL. THE POWER PLANT WEIGHS APPROXIMATELY 6280 POUNDS (2850KG). MAKE SURE THAT ALL PERSONNEL IS AWAY FROM THE AIRCRAFT WHEN THE POWER PLANT IS REMOVED.
(1) Remove the bolts (85), washers (90), nuts (120) that attach the forward engine mount (95) to the pylon. (Ref. Fig. 408/TASK 71-00-00-991-916)
(2) Remove the bolts (135) and washers (140) that attach the aft engine mount (145) to the pylon. (Ref. Fig. 410/TASK 71-00-00-991-918)
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Aft Engine Mount
Figure 410/TASK 71-00-00-991-918
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