Removal / Installation; Compressor Assembly; Compressor Assembly Removal; Operation Without The Compressor Assembly Installed - MD Helicopters MD Explorer Servicing And Maintenance

1. Compressor Assembly

A. Compressor Assembly Removal
(Ref. Figure 401)
The receiver dehydrator must
CAUTION
be replaced each time the com­
pressor is removed, or the air-conditioning
(AC) system is opened. An early failure of
the compressor can occur.
(1). Open Access Panel R210 (ref. Section
06-00-00).
(2). Evacuate AC system (ref. Section
12-00-00).
(3). Disconnect Electrical Connector SP1
(5).
(4). Disconnect outlet hose (2).
(5). Disconnect inlet hose (3).
(6). Disconnect drain hose (4).
(7). Remove nuts (6) and washers (7).
(8). Carefully remove compressor (1).
(a). Remove and discard packings (8, 9).
B. Operation Without the Compressor
Assembly Installed
NOTE:
If the rotorcraft is to be operated with­
out the compressor installed, do these steps.
(1). Remove outlet hose (2) and install a
pressure cap on the fitting or swivel nut
tee.
(a). Torque the cap.
(2). Remove inlet hose (3) and install a
pressure cap on the swivel nut tee.
(a). Torque the cap.
(3). Remove AC compressor drive pad drain
hose (4) and install pressure caps on
the flared tube union and flared tube
tee.
(a). Torque the caps.
MD Helicopters, Inc.
Rotorcraft Maintenance Manual
AIR−CONDITIONING SYSTEM

REMOVAL / INSTALLATION

(4). Install the engine accessory drive cover
and gasket.
(a). Torque the nuts.
C. Compressor Assembly Installation
(Ref. Figure 401)
Consumable Materials
(Ref. CSP−SPM)
Item Nomenclature
C106 Oil, Lubricating
(1). If the rotorcraft was operated without
the compressor installed, do these
steps:
(a). Remove engine accessory drive cover
and gasket.
(b). Remove pressure caps from flared
tube union and flared tube tee and
install drain hose (4).
1). Torque both captive nuts of drain
hose (4) 50 to 65 in-lb (5.65 to
7.34 Nm).
(c). Remove pressure cap from swivel nut
tee and install inlet hose (3).
1). Torque the nut of inlet hose (3) 460
to 550 in-lb (51.97 to 62.14 Nm).
(d). Remove pressure cap from fitting or
swivel nut tee and install outlet hose
(2).
1). Torque the nut of outlet hose (2)
230 to 260 in-lb (25.99 to 29.38
Nm).
(2). If the compressor (1) is replaced, or the
AC system was opened, do these steps:
(a). Do the Evaporator Internal Cleaning
procedure (ref. CSP-SPM, Section
20-20-00).
(b). Do the Condenser Internal Cleaning
procedure for both condensers (ref.
CSP-SPM, Section 20-20-00).
21-50-00
CSP−900RMM−2
Page 401
Revision 34