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9.1
General:
9.1.1
Refer to Illustrated Parts Listing (IPL) during assembly procedures for figure/item numbers (Section 11).
WARNING: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE PERFORMING SERVICE TO THE UNIT.
CAUTION: SERVICE TECHNICIANS MUST PREVENT CONTAMINATION OF INTERNAL SYSTEM PLUMBING DURING ANY SERVICING AND/OR MAINTENANCE OPERATION. THIS INCLUDES NOT ALLOWING THE RECEIVER DRYER TO BE EXPOSED TO ATMOSPHERIC CONDITIONS FOR ANY LENGTH OF TIME. ALL PLUMBING LINES SHOULD REMAIN CAPPED WHENEVER POSSIBLE DURING THE SERVICING OF THE SYSTEM.
CAUTION: RECEIVER DRYER MUST BE REPLACED ANY TIME THE VCS PLUMBING IS OPENED FOR MAINTENANCE. REFER TO DISASSEMBLY (SECTION 5) AND ASSEMBLY (SECTION 9).
9.1.2
Gain access to the Compressor Drive Module, Condenser Blower Assembly, or Evaporator Module (refer to the aircraft maintenance manual for removal of access panels and other hardware that might need to be removed)
9.1.3
Verify that power is removed from aircraft. If it is not practical to remove aircraft power, technician must pull and collar applicable circuit breakers.
9.1.4
After assembly of any component requiring installation of refrigerant plumbing or hoses, charge refrigerant system (refer to Servicing, Section 13).
NOTE: A functional test should be performed any time one or more components are removed and replaced. Prior to starting functional test, ensure that all components of the assembly are installed. Refer to Test and Fault Isolation Section 3.
9.1.5
Tools, fixtures, equipment, or consumable items required
•
Small hand tools and socket set
•
Gates Sonic Belt Tension Meter
•
Small ‘rare earth” magnet
•
Tape
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 7002
FEBRUARY 16, 2010
•
Straight edge
•
Measuring device
•
Shop air, 40 PSIG max
•
Micrometer
•
Scribe or wire hook
•
Inspection mirror
•
Thermometer, 0-150°F
•
Flash light or service lamp
•
R-134a service manifold and gauge set
•
R-134a electronic leak detector
•
R-134a refrigerant cylinder
•
Leak check fluid (soapy)
•
Thread sealant primer
•
Thread sealant
•
Dry nitrogen, regulated
SUBTASK 21-00-09-40-001
9.2
Receiver Dryer assembly procedures:
9.2.1
Assembly of Receiver Dryer
9.2.1.1
Position receiver dryer on motor support bracket and attach with mounting clamps.
9.2.1.2
Connect pressure switch electrical wiring (if applicable).
SUBTASK 21-00-09-40-002
9.3
Compressor Drive Module assembly procedures (refer to Figure 10001):
9.3.1
Assembly of Drive Motor Brushes (refer to Figure 4 for details)
CAUTION: ENSURE THAT MOTOR COMMUTATOR IS CLEAR OF ANY CONTAMINATION AND THAT ALL CARBON DUST IS REMOVED.
CAUTION: DO NOT ALLOW BRUSH SPRING TO SNAP AGAINST THE BRUSH OR BRUSH DAMAGE MAY RESULT.
9.3.1.1
Ensure that brushes have been tested (refer to Testing and Fault Isolation, Sect. 3).
9.3.1.2
Lift brush spring and slide brush into brush rack. Verify that brush direction is against commutator.
9.3.1.3
Seat new brushes according to Special Procedures, Section 12. All new brushes must be seated to ensure proper motor operation and/or performance.
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 7003
FEBRUARY 16, 2010
CAUTION: APPLY THREAD SEALANT SPARINGLY TO MALE FITTING THREADS STAYING CLEAR OF FIRST 2-3 THREADS.
9.3.1.4
Attach brush shunt wire terminal to brush rack using attaching screw. Apply a drop of thread sealant to screw.
9.3.1.5
Route brush shunt leads to allow for brush wear and to prevent shorting.
9.3.1.6
Install brush cover screen and secure with attaching screws and washers (refer to table 1, section 1.3 for torque specifications). Safety wire screws in place.
9.3.1.7
Run system for a minimum of 15 minutes to seat brushes and check motor operation.
9.3.2
Assembly of Fan (70)
9.3.2.1
Slide fan assembly and spacer onto motor shaft.
CAUTION: APPLY THREAD SEALANT SPARINGLY TO MALE FITTING THREADS STAYING CLEAR OF FIRST 2-3 THREADS.
9.3.2.2
Apply a drop of thread sealant to the set screw thread. Tighten fan assembly set screw (refer to table 1, Section 1.3 for torque specifications), insuring that the screw is located on flat part of motor shaft.
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OPERATING, SERVICING, AND COMPONENT MAINTENANCE MANUAL(20)
