Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 194
FIXED DISPLACEMENT COMPRESSOR—MODEL SD709P
INDEX
page
page
Compressor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Compressor Clutch/Coil Assembly
. . . . . . . . . . . . 38
Compressor Shaft Seal
. . . . . . . . . . . . . . . . . . . . 41
Cylinder Head/Valve Plate
. . . . . . . . . . . . . . . . . . 44
Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Refrigerant System Diagnosis
. . . . . . . . . . . . . . . 45
DESCRIPTION
The Sanden compressor is a 7 piston design. Sys-
tem lubrication is provided by 135 ml
615 ml (4.6 oz.
60.5 oz.) of 500 viscosity refrigerant oil.
The clutch used on the compressor consists of 3 ba-
sic components:
• The pulley
• Front plate
• Field coil
The pulley and field coil are attached to the front
head of the compressor with tapered snap rings. The
hub is keyed to the compressor shaft and is retained
on the shaft with a self-locking nut. Special service
tools are required to remove and install the clutch
plate on the compressor shaft.
COMPRESSOR
The A/C compressor may be removed and posi-
tioned without discharging the refrigerant system.
Discharging is not necessary if removing the A/C
compressor clutch/coil assembly, engine, cylinder
head, or generator.
WARNING: REFRIGERANT PRESSURES REMAIN
HIGH
EVEN
THOUGH
THE
ENGINE
MAY
BE
TURNED
OFF.
BEFORE
REMOVING
A
FULLY
CHARGED COMPRESSOR, REVIEW THE SAFETY
PRECAUTIONS AND WARNINGS SECTION IN THIS
GROUP. DO NOT TWIST OR KINK THE REFRIGER-
ANT LINES WHEN REMOVING A FULLY CHARGED
COMPRESSOR.
SAFETY
GLASSES
MUST
BE
WORN.
REMOVAL
(1) Disconnect negative cable from battery.
(2) Loosen and remove drive belts (refer to group
7, Cooling System) and disconnect compressor clutch
wire lead.
(3) Remove refrigerant lines from compressor (if
necessary).
(4) Remove compressor attaching nuts and bolts.
(5) Remove compressor. If refrigerant lines were
not removed, lift compressor/clutch assembly and tie
it to a suitable component.
To install, reverse the removal procedure.
COMPRESSOR CLUTCH/COIL ASSEMBLY
The magnetic clutch consists of a stationary elec-
tro-magnetic coil and a rotating pulley and plate as-
sembly.
The electromagnetic coil is retained on the com-
pressor with a snap ring and is dimpled to maintain
its position.
The pulley and plate assembly are mounted on the
compressor shaft.
When the compressor is not in operation, the pul-
ley free wheels on the clutch hub bearing. When the
coil is energized the plate is magnetically engaged
with the pulley and turns the compressor shaft.
REMOVAL
(1) Insert the 2 pins of the front plate spanner into
any 2 threaded holes of the clutch front plate (Fig.
1). Hold clutch plate stationary. Remove hex nut
with 19 mm (3/4 inch) socket.
(2) Remove clutch front plate using puller. Align
puller center bolt to compressor shaft (Fig. 2). Thumb
tighten the puller bolts into the threaded holes.
(3) Turn center bolt clockwise with 19 mm (3/4
inch) socket until front plate is loosened.
(4) Remove shaft key by lightly tapping it loose
with a slot screwdriver and hammer (Fig. 3).
(5) Remove the external front housing snap ring
by using spread type snap ring pliers (Fig. 4).
Fig. 1 Hex Nut Removal
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HEATING AND AIR CONDITIONING
Ä
(6) Insert the lip of the jaws of the rotor puller into
the snap ring groove exposed in the previous step
(Fig. 5).
(7) Place rotor puller shaft protector over the ex-
posed shaft.
(8) Install the puller plate and bolt (Fig. 6). 2 bolts
go through the plate and into the jaws. Finger
tighten bolts.
(9) Turn puller center bolt clockwise using 3/4 inch
socket until rotor pulley is free.
(10) Loosen coil lead wire from clip on top of com-
pressor front housing (Fig. 7).
(11) Using spread type snap ring pliers, remove
snap ring and field coil (Fig. 8).
INSTALLATION
(1) Install the field coil with the snap ring.
(2) Place coil lead wire under clip on top of com-
pressor front housing and tighten the retaining
screw.
(3) Support the compressor on the 4 mounting ears
at the compressor rear. If a vise is being used, clamp
only on the mounting ears. Never clamp on the com-
pressor body.
(4) Align rotor assembly squarely on the front
housing hub.
Fig. 2 Clutch Front Plate Removal
Fig. 3 Shaft Key Removal
Fig. 4 External Snap Ring Removal
Fig. 5 Install Shaft Protector
Ä
HEATING AND AIR CONDITIONING
24 - 39
(5) Using Rotor Installer Set, place the ring part of
the set into the bearing cavity (Fig. 9). Make certain
the outer edge rests firmly on the rotor bearing inner
race.
(6) Place the tool set driver into the ring (Fig. 10).
(7) With a hammer, tap the end of the driver while
guiding the rotor to prevent binding. Tap until the
rotor bottoms against the compressor front housing
hub. Listen for a distinct change of sound during the
tapping process.
(8) Install external front housing snap ring with
spread type snap ring pliers.
(9) Install front plate assembly.
• Check that original clutch shims are in place on
compressor shaft.
• Replace compressor shaft key.
• Align front plate key-way to compressor shaft key.
(10) Using shaft protector, tap front plate to shaft
until it has bottomed to the clutch shims (Fig. 11).
Listen for a distinct change of sound during the tap-
ping process.
Fig. 6 Install Puller Plate
Fig. 7 Loosen Coil Lead Wire
Fig. 8 Snap Ring and Field Coil Removal
Fig. 9 Rotor Installer Set
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HEATING AND AIR CONDITIONING
Ä
(11) Replace shaft hex nut. Tighten the hex nut to 37
N
Im (27 ft. lbs.) torque.
(12) Check air gap with feeler gauge (Fig. 12). The
specification is 0.406-0.787 mm (0.016-0.031 inch). If
air gap is not consistent around the circumference,
lightly pry up at the minimum variations. Lightly tap
down at points of maximum variation.
The air gap is determined by the spacer shims.
When installing the original or a new clutch
assembly, try the original shims first. When in-
stalling a new clutch onto a compressor that
previously did not have a clutch, use 0.040, 0.020,
and 0.005 shims from the clutch accessory sack.
(13) If the air gap does not meet the specification
given, add or subtract shims as required.
COMPRESSOR SHAFT SEAL
Using a refrigerant recovery machine, remove the
refrigerant from the A/C system before replacing
shaft seal.
REMOVAL
(1) Insert the 2 pins of the front plate spanner into
any 2 threaded holes of the clutch front plate (Fig.
1). Hold clutch plate stationary. Remove hex nut
with 19 mm (3/4 inch) socket.
(2) Remove clutch front plate using puller (Fig. 2).
Align puller center bolt to compressor shaft. Thumb
tighten the 3 puller bolts into the threaded holes.
(3) Turn center bolt clockwise with 19 mm (3/4
inch) socket until front plate is loosened.
Fig. 12 Check Air Gap
Fig. 1 Hex Nut Removal
Fig. 10 Tool Set Driver
Fig. 11 Front Plate Installation
Ä
HEATING AND AIR CONDITIONING
24 - 41
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