C. Procedure
S 214-023
(1) Make sure you install the flexible coupling sleeve and the ring on the ACM connecting ducts.
NOTE: The procedure for the installation of the flexible couplings
____ is different for a new or a used coupling. Make sure you follow the steps to install the flexible coupling correctly (Ref 21-51-61/401).
S 434-085
(2)
Lift the ACM into its position and install the three mounting bolts (Detail E, Fig. 401).
S 224-088
(3)
ON AIRPLANES WITH A JUMPER ASSEMBLY; Make sure that the bonding resistance between the ACM and the support bracket assembly is a maximum of 0.0025 ohm.
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A 737-300/400/500MAINTENANCE MANUAL
(4) S 984-026Move the compressor inlet duct and the outlet/water separator muff of the turbine ducts into their positions.
(5) S 984-027Move the compressor outlet and the turbine inlet ducts into their positions.
(6) S 214-028Make sure the ACM is aligned with the ducts.
(7) S 824-029Do these steps to align the ACM with the ducts if it is not aligned. (a) Loosen the two index plate bolts that attach the index plate to the support bracket assembly. (b) Add or remove one washer from the aft mounting bolt between the index plate and the support bracket to align the ACM. (c) Tighten the two index plate bolts and the aft mounting nut.
(8) S 434-030Install the flexible coupling assemblies at the compressor inlet, the turbine inlet, and the compressor outlet of the air cycle machine (AMM 21-51-61/401).
(9) S 414-090Put the water separator muff in its position.
S 414-091
(10)
Install the water separator muff clamp (AMM 21-51-61/401).
S 434-031
(11)
Install the clamp that connects the water separator muff and the duct from the 35°F control valve.
S 414-092
(12)
Install the water separator (AMM 21-51-31/401).
S 434-032
(13)
Install the overheat switch for the compressor discharge in the ACM compressor scroll.
S 614-033
(14)
Fill the ACM with oil (Ref 21-51-11/301).
S 864-045
(15)
Supply electrical power (Ref 24-22-00/201).
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A
737-300/400/500MAINTENANCE MANUAL
AIR CYCLE MACHINE (ACM)
SEE B
AIR CONDITIONING EQUIPMENT BAY
SEE A
FWD35`F CONTROL VALVE
AIR CONDITIONING EQUIPMENT BAY
A
TO WATER SEPARATOR
COMPRESSOR CLAMPS
COMPRESSOR
INLET DUCT
SCROLL COMPRESSOR
OUTLET DUCT WATER SEPARATOR MUFF
AIR CYCLE OVERHEAT MACHINEFLEXIBLE SWITCHCOUPLING
35`F CONTROL VALVE
FOR THEASSEMBLY COMPRESSOR(4 LOCATIONS)
D
DISCHARGE
LUBRICATION SIGHT GAGEDATA PLATE
SUPPORT TURBINE
BEAM
DRAIN PLUG TURBINE INLET DUCT
(MAGNETIC)
SEE C
TURBINE
FWD OUTLET DUCT
AIR CYCLE MACHINE
B
MOUNT ASSEMBLYWATER SEPARATOR
MUFF CLAMP SEE E
WATER SEPARATOR MUFF
MOUNTING
BRACKET WATER SEPARATOR
COMPRESSOR INLET DUCT
FILLER PLUG WATER
35`F
OUTBD SEPARATOR
CONTROL DRAIN PLUG CLAMP
FLEXIBLE COUPLING
VALVE (MAGNETIC)
FWD ASSEMBLY (4 LOCATIONS) SEE D TURBINE NOTE: LEFT INSTALLATIONS ARE SHOWN.
C
RIGHT INSTALLATIONS ARE EQUIVALENT.
Air Cycle Machine Installation
Figure 401 (Sheet 1)
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