Enviro PILATUS PC12

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Component Maintenance Manual

12037 N Highway 99

Seminole, OK 74868

Phone (405) 382-0731

Fax (405) 382-0737

http://www.enviro-ok.com

ATA 21-00-23

Page | 30

Revision 10

June 1, 2017

5.2.11.2 Remove attaching screws, washers, and nuts.

5.2.11.3 Carefully slide hour meter from receiver dryer bracket.

5.2.12 Removal of Drive Motor Brushes

5.2.12.1 Locate and remove the safety wire and screws securing the brush cover.

Main Page

Record of Temporary Revisions4
List of Service Bulletins5
List of Effective Pages6
Table of Contents7
List of Illustrations9
List of Tables9
Introduction10
Manual Introduction10
General Introduction (How to Use)10
Acronyms, Abbreviations, and Symbols11
Standard Torque Values12
Documents Required12
Consumable Products12
Table 1 Standard Torque Values12
Table 2 Consumable Products12
Description and Operation13
R-134A Air Conditioning System Description and Operation13
General13
System Description and Operation14
System Component Description and Operation15
Testing and Fault Isolation18
R-134A Air Conditioning System Component - Testing and Fault Isolation18
General18
Compressor Condenser Module Assembly Testing Procedures18
Evaporator Module Assembly Testing Procedures18
System Leak Check Testing Procedure19
Fault Isolation (Trouble Shooting)21
Table 3 Trouble Shooting List22
Table 3 Trouble Shooting List23
Table 3 Trouble Shooting List24
Schematic and Wiring Diagrams25
R-134A Air Conditioning System Schematic and Wiring Diagrams25
R-134A Refrigerant Flow Schematic25
Figure 1 R-134A Refrigerant Flow Schematic25
Disassembly26
R-134A Air Conditioning System Component - Disassembly26
General26
Compressor Condenser Module Disassembly Procedures27
Evaporator Module Assembly Disassembly Procedures33
Cleaning34
R-134A Air Conditioning System Component - Cleaning Procedures34
General34
Compressor Condenser Module Cleaning Procedures35
Evaporator Module Assembly Cleaning Procedures36
Check (Inspection Schedule)37
R-134A Air Conditioing System Component - Inspection Schedule37
Compressor Condenser Module Assembly Inspection Schedule37
Table 3.5 Compressor Condenser Module Inspection Schedule37
Figure 3.3: Commutator Excellent Condition Example39
Figure 3.4: Commutator Serviceable Condition Example40
Figure 3.5: Commutator Unserviceable Condition Example41
Evaporator Module Assembly Inspection Schedule42
Table 3.6 Forward and Aft Evaporator Module Inspection Schedule42
Repairs43
R-134A Air Conditioning System Component - Repair Procedures43
General43
Compressor Condenser Module Repair Procedures43
Evaporator Module Assembly Repair Procedures46
Assembly48
R-134A Air Conditioning System Component - Assembly48
General48
Compressor Condenser Module Assembly Procedures49
Figure 4 Belt Tensioning Reference61
Table 4 Gates Sonic Tension Meter Data61
Evaporator Module Assembly Procedures64
Special Tools, Fixtures, and Equipment66
10.0 Special Tools/Equipment66
General66
Illustrated Parts List68
11.0 R-134A Air Conditioning System Component Illustrated Parts Listing68
Introduction68
Figure 10001 Compressor Condenser Module Assembly 1134400-5369
Figure 10001 Compressor Condenser Module Assembly (1134400-53) Details70
Figure 10002 Evaporator Module Assembly 1134200-42 (L) /-43 (C,R)74
Figure 10002 Evaporator Module Assembly (1134200-42/-43) Details75
Figure 10003 Evaporator Module Assembly 1134200-60/-61/-63 (-60 Shown)76
Figure 10003 Evaporator Module Assembly (1134200-60/-61/-63) Details77
Special Procedures78
12.0 Special Prodecures78
Expansion Valve Alignment78
Table 5 Typical Operating Values79
12.2 Balancing Multiple Evaporators80
Motor Insulation Resistance Check80
Motor Bearing Inspection81
Compressor Bearing Inspection81
Compressor Oil Level Check82
Servicing83
13.0 R-134A Air Conditioning System Servicing Procedures83
General83
Evacuating the System (R-134A)84
Charging the System (R-134A)84
Flushing the System (R-134A)85
Storage87
14.0 Compressor Condenser Module Assembly Storage Procedures87
General87
System Long Term Shelf Storage87
System Off-Season/On-Aircraft Functional Tests88
General System Component Storage Procedures88

Enviro PILATUS PC12 - Page 30

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