Page 21.8 Chapter 21 Environment Control R66 Maintenance Manual SEP 2012
21-23 Evaporator Assembly
Refer to R66 Illustrated Parts Catalog (IPC) Figure 21-11.
A. Removal
1. Recover refrigerant per Section 12-82.
2. Refer to Section 6-70. Detach F931-1 seat assembly (secured via hook and loop
tape) from F474-1 cover assembly and remove seat. Remove hardware securing
cover assembly and F380-8 angle to F377-1 middle seat assembly; remove cover
and angle.
3. Cut and discard ty-raps as required and disconnect D799-7 (freeze) switch assembly
wiring from airframe harness at connector.
4. Remove screws securing G798-1 cover assembly to seat assembly. Remove
hardware securing G784-1 evaporator assembly and switch to seat assembly.
5. Using backup wrench, disconnect D795-8 line assembly and evaporator line b-nuts
from G794 hose assemblies.
6. Remove aluminum tape securing F380-7 cover to middle seat (if installed). Detach
grommet from seat assembly and carefully remove evaporator and attached
components forward through seat assembly vertical wall relief. Cap fittings.
B. Installation
1. Remove caps. Position G784-1 evaporator assembly and associated components
in F377-1 middle seat assembly. Install screws securing evaporator and D799-7
(freeze) switch assembly to seat assembly. Install screws securing G798-1 cover
assembly to seat assembly.
2. Connect D795-8 line assembly and evaporator line b-nuts to G794 hose assemblies.
Using backup wrench, special torque hose b-nuts per Section 20-33, and torque
stripe per Figure 5-1.
3. Connect freeze switch wiring to airframe harness at connector and install ty-raps as
required. Cinch ty-raps until snug without over-tightening, and trim tips flush with
heads.
4. Perform leak detection per Section 12-83.
5. Charge system with refrigerant per Section 12-82.
6. Install screws securing F474-1 cover assembly and F380-8 angle to middle seat.
Attach F931-1 seat assembly (secured via hook and loop tape) to cover.
To Next Page
Loading...