(2)
Access Panels
191A-L Air Conditioning Access Door
191H-L Air Conditioning Access Door
192A-R Air Conditioning Access Door
F. Install the Air Cycle Machine (ACM)
S 434-032
(1) To install the bracket and the jumper on the ACM, do these steps:
(a) Use the solvent and the cheesecloth to clean and dry the bonding surfaces (AMM 20-11-14/701).
NOTE: The bonding surfaces must be clean and dry to
____ provide a good electrical ground path.
(b) Install the nuts (19), washers (20) and bolts (21) to hold the bracket (14) and the jumper (15) to the top of the ACM (7).
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(c) Use the bonding meter to measure the resistance between the bonding jumper terminal and the ACM near the bonding jumper connection. (AMM 20-22-01/601).
NOTE: If necessary, you can remove a small area of the
____ surface finish to make the measurement.
(d)
If the resistance is greater than 0.010 ohms, then disassemble the bonding jumper connection, repeat the cleaning and assembly steps, and measure the resistance again.
(e)
If you removed any of the surface finish from the ACM, then use the alodine to repair the surface finish.
S 424-037
WARNING: THE AIR CYCLE MACHINE WEIGHS APPROXIMATELY 63 POUNDS
_______
(28.6 KILOGRAMS). WHEN AN ITEM CANNOT BE LIFTED WITH EASE, USE TWO OR MORE PEOPLE TO AVOID INJURY.
CAUTION: DO NOT ROTATE THE ROTATIVE ASSEMBLY BY HAND AS BEARING
_______
DAMAGE COULD OCCURE.
(2)
Use the lifting tool to put the ACM (7) in its position in the air cooling pack.
S 434-017
(3)
Install the nuts (16), washers (17) and bolts (18) (4 locations) to hold the ACM (7) to the airplane structure.
S 484-034
(4)
Remove the lifting tool from the ACM.
S 434-018
(5)
To connect the jumper to the airplane structure, do these steps:
(a) Use the solvent and the cheesecloth to clean and dry the bonding surfaces (AMM 20-11-14/701).
NOTE: The bonding surfaces must be clean and dry to
____ provide a good electrical ground path.
(b)
Attach the jumper assembly (15) to the airplane structure.
(c)
Use the bonding meter to measure the resistance between the bonding jumper terminal and the airplane structure near the bonding jumper connection. (AMM 20-22-01/601).
NOTE: If necessary, you can remove a small area of the
____ surface finish to make the measurement.
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(d)
If the resistance is greater than 0.010 ohms, then disassemble the bonding jumper connection, repeat the cleaning and assembly steps, and measure the resistance again.
(e)
If you removed any of the surface finish from the airplane structure, then use the alodine to repair the surface finish.
S 824-035
CAUTION:_______MAKE SURE YOU ALIGN THE DUCTS CORRECTLY. IF YOU TIGHTEN A CLAMP WHEN THE DUCTS ARE NOT CORRECTLY ALIGNED, YOU CAN CAUSE DAMAGE TO THE DUCTS.
(6)
Align the ACM with the ducts that connect to the ACM.
S 434-020
(7)
Install the clamp (8) between the ACM (7) and the fan diffuser housing (9).
(a)
Put the clamp (8) in its position with easy access to the tie bolts.
(b)
Tighten the two clamp nuts to approximately 35 pound-inches
(3.95 newton-meters).
(c)
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