1991 FORD FESTIVA lock

5. Using Shaft Seal Remover/Installer (T87P-19623-C), remove seal by pushing downward on shaft seal remover/installer and rotating
clockwise to engage seal tangs. Pull seal from compressor.
Installation
1. Place Shaft Seal Protector (T71P-19703-H) over compressor shaft. Lubricate shaft seal and nose of compressor with new refrigerant oil.
DO NOT touch sealing surface of seal or shaft. Engage seal tangs on shaft seal remover/installer.
2. Align flats of seal with flats on crankshaft and push new seal on compressor shaft. Push downward on shaft seal remover/installer and
turn counterclockwise to disengage seal tangs.
3. Attach shaft seal seat to shaft seal seat remover/installer and lubricate with new refrigerant oil. Install seal seat and push inward against
seal. Install seal seat retaining snap ring.
4. Install dust seal retainer and felt packing. Install clutch plate shims. Ensure clutch plate aligns with crankshaft key. Using Clutch Plate
Installer (T80L-19703-F), install clutch plate.
5. Install crankshaft nut. Using spanner to hold clutch, tighten crankshaft nut to 10-14 ft. lbs. (13-20 N.m). DO NOT tighten nut with air
tools.
6. Using feeler gauge, check clearance between clutch plate and pulley. Rotate compressor clutch and check clearance in more than one
place. Proper clearance is .021-.036" (.53-.91 mm). If clearance is not correct, add or remove shims.
7. Add same amount new refrigerant oil to compressor as was drained. Rotate compressor 10 revolutions to distribute oil. Install
compressor. Evacuate and recharge system. Perform leak test.
NIPPONDENSO 10P15A SHAFT SEAL
Removal
1. Discharge system using approved refrigerant recovery/recycling equipment and remove compressor. Drain oil from compressor and
record amount for reassembly. Remove clutch assembly. See NIPPONDENSO 10P15A CLUTCH ASSEMBLY R & I in this article.
2. Remove manifold assembly from top of compressor. Clean compressor front hub area. Using Ring Remover (T71P-19703-C), remove
retaining ring from front of compressor shaft.
3. Remove felt seal from front of compressor. Remove front head retaining bolts and front head from compressor. Remove snap ring fro m
rear of front head. Remove seal from rear of front head.
Installation
1. Install seal and snap ring in front head. Install front head on compressor. Tighten bolts to 18-20 ft. lbs. (24-27 N.m). Install felt packing
and retaining ring.
2. Install manifold assembly and tighten bolts to 18-20 ft. lbs. (24-27 N.m). Add same amount of new refrigerant oil to compressor as that
drained from compressor. Rotate compressor 10 revolutions to distribute oil in compressor. Install compressor. Evacuate and recharge
system. Perform leak test.
NIPPONDENSO 10PA17 & 10PA17A CLUTCH ASSEMBLY
Removal
1. Remove compressor shaft bolt and discard. Remove clutch plate and shims. If clutch hub cannot be removed by hand, thread a 8-mm
bolt in center of clutch plate. Tighten bolt and remove clutch plate.
2. Remove pulley assembly retaining snap ring. Remove pulley assembly. Remove snap ring and disconnect clutch coil electrical wiring.
Remove clutch coil.
Installation
1. Install clutch coil so pin in back of coil aligns with hole in front housing. Install snap ring with beveled side away from compressor.
2. Install pulley assembly. Install snap ring with beveled side away from compressor. Coat splines of compressor shaft with White grease. I
f
reusing original clutch plate and pulley, old shims can be used.
3. If installing new components, install one thin shim. Install clutch plate. Tighten compressor shaft bolt to 10 ft. lbs. (14 N.m). DO NOT
air tools to tighten bolt.
4. Using feeler gauge, measure air gap between clutch plate and pulley surface in 3 areas. Proper clearance is .014-.026" (.35-.66 mm).
Adjust shim thickness to obtain correct clearance.
5. Once compressor shaft bolt is tightened, recheck clearance between clutch plate and pulley surface in 4 places. Readjust clearance if
necessary.
NIPPONDENSO 10PA17 & 10PA17A SHAFT SEAL
Removal
1. Discharge system using approved refrigerant recovery/recycling equipment and remove compressor. Drain oil from compressor and
record amount for reassembly. Install compressor in Holding Fixture (T89P-19623-D) and clamp fixture in a vise.
2. Remove clutch assembly. See NIPPONDENSO 10PA17 & 10PA17A CLUTCH ASSEMBLY R & I in this article. Remove front head
retaining bolts. Separate front head from compressor, using care not to scratch sealing surface. See Fig. 4
.
3. Using "O" Ring Remover (T71P-19703-C), remove felt dust seal and dust seal retainer from front head. Remove shaft seal retaining snap
ring. Position front head (nose up) on cardboard placed on a flat surface. Using Shaft Seal Remover (T89P-19623-E), push shaft seal
from front head. NOTE:After installing new clutch, ensure voltage is correct and cycle clutch with 5 seconds on and 5 seconds
off. Repeat cycle for approxim ately 20 tim es with A/C on, blower fan on high speed and engine RPM at
1500-2000. T his provides better clutch torque capability.
Page 6 of 7 MITCHELL 1 ARTICLE - GENERAL SERVICING 1991 Ford Compressor Overhaul
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Back To Article
A/C COMPRESSOR SERVICING
1991 GENERAL SERVICING Com pressor Service
ISOLATING COMPRESSOR
1. Connect service gauge set to the compressor service valves and open compressor valves slightly (turn in clockwise). Start engine and
operate air conditioning. Slowly turn compressor suction valve clockwise toward closed (front-seated) position.
2. When suction pressure is reduced to zero or less, turn off engine and compressor and quickly turn suction valve stem in to full front-
seated position. Suction pressure should be slightly above zero. Turn discharge valve into front-seated position.
3. To check oil level, slowly open compressor crankcase plug to relieve any remaining pressure. After oil level is corrected, cap service
gauge ports on both valves. Back-seat suction service valve to allow refrigerant to enter compressor. Open discharge valve halfway.
4. Loosen discharge service valve cap, allowing refrigerant pressure to force air out of compressor. Back-seat service valve and tighten cap.
Compressor is now ready for operation.
REFRIGERANT OIL
Only new, pure, moisture-free refrigerant oil should be used in the air conditioning system. This oil is highly refined and dehydrated to a point
where moisture content is less than 10 parts per million. The oil container must be tightly closed at all times when not in use, or moisture will
be absorbed into the refrigerant oil from the air.
DISCHARGING SYSTEM PRECAUTIONS
If compressor has stem-type service valves, it can be isolated and removed without discharging entire system. Otherwise, discharge system
completely using approved refrigerant recovery/recycling equipment before loosening any fittings.
DISCONNECTING LINES & FITTINGS TEST
After system is discharged, carefully clean area around all fittings to be opened. Always use 2 wrenches when tightening or loosening fittings
to avoid twisting or distorting lines. Cap or plug all openings as soon as lines are removed. Do not remove caps until immediately before
connections are made. This will keep entry of air and moisture to a minimum.
CONNECTING LINES AND FITTINGS
A new gasket or "O" ring should be used in all instances when connecting lines or fittings. Dip "O" ring in new refrigerant oil and ensure it is
not twisted during installation. Always use 2 wrenches to prevent damage to lines and fittings.
PLACING SYSTEM IN OPERATION
After component service or replacement has been completed and all connections have been made, evacuate system thoroughly with a vacuum
pump. Charge system with proper amount of refrigerant and perform a leak test. See REFRIGERANT OIL & R-12 SPECIFICATIONS chart in
this section for system capacities. Be sure to check all fittings that have been opened. After system has been leak tested, make a system
performance check.
ATSUGI ROTARY VANE CLUTCH R & I
Removal
When replacing compressor clutch, be careful not to scratch shaft or bend pulley. When removing center bolt, hold clutch disc with Clutch
Holder (KV99231010). Using Hub Puller (KV998VR001 & KV99231010), remove clutch disc. When removing pulley, remove lock nut with
Hub Socket (KV99235160).
Installation
Wipe oil off clutch surface. Adjust disc pulley clearance to .012-.024" (.3-.6 mm). Tighten center bolt to 80-104 INCH lbs. (9.1-11.8 N.m).
Tighten clutch lock nut to 22-29 ft. lbs. (29-39 N.m). See Fig. 1
. CAUT ION: When discharging air conditioning system , use only approved refrigerant recovery/recycling
equipm ent. Make every attem pt to avoid discharging refrigerant into the atm osphere.
NOTE:Only com pressors with stem -type service valves can be isolated.
CAUT ION: When discharging air conditioning system , use only approved refrigerant recovery/recycling
equipm ent. Make every attem pt to avoid discharging refrigerant into the atm osphere.
NOTE:Air conditioning system s will not norm ally need addition of refrigerant oil unless definite oil loss has
occurred due to ruptured lines, leaking com pressor seals, com pressor overhaul or com ponent
replacem ent.
Page 1 of 18 MITCHELL 1 ARTICLE - A/C COMPRESSOR SERVICING 1991 GENERAL SERVICING Compressor Service
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Fig. 1: Atsugi Rotary Vane Compressor

Courtesy of NISSAN MOTOR CO., U.S.A.
BOSCH 6-CYL CLUTCH R & I
Removal
1. Hold clutch plate and remove shaft nut. Using Clutch Plate Remover (64 5 00), remove clutch plate. Using snap ring pliers, remo ve
circlip and remove pulley assembly.
2. If pulley bearing is being replaced, remove circlip at rear of pulley. Press bearing and spacer from pulley. Press in new bearing with
spacer and replace circlip.
Installation
1. Clean all surfaces. Install pulley assembly on compressor and install circlip. Ensure clutch plate shim is in place on shaft. Install clutch
plate and nut. Tighten nut to 13-14 ft. lbs. (18-20 N.m).
2. Using a feeler gauge, check clutch plate-to-pulley clearance. Clearance should be .028-.051" (.7-1.3 mm). If clearance is not correct,
remove clutch plate and replace clutch plate shim. See Fig. 2
.
BOSCH 6-CYL SHAFT SEAL R & I
Removal & Installation
1. Remove clutch plate. Remove shaft key and circlip. Using Seal Seat Remover/Installer (64 5 030), remove seal seat.
2. Using Seal Remover/Installer (64 5 040), remove shaft seal by turning seal slightly clockwise to disengage tangs and pull out shaft seal.
Remo ve "O" rin g seal .
3. Coat new "O" ring seal with refrigerant oil and install. Coat new shaft seal with refrigerant oil and install shaft seal on Seal
Remover/Installer (64 5 040). Ensure alignment of shaft seal and shaft machine surfaces. Insert shaft seal and turn slightly
counterclockwise to secure on shaft.
4. Using sleeve from Seal Seat Remover/Installer (64 5 030), push seal seat into compressor and install circlip. Install shaft key and clutch
plate. Check compressor oil level before charging system.
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Fig. 4: Diesel Kiki Rotary Vane Compressor

Courtesy of NISSAN MOTOR CO., U.S.A.
DIESEL KIKI 6-CYL SHAFT SEAL R & I
Removal & Installation
1. Remove clutch coil assembly. Remove retainer and felt. Discard retainer and felt. Using internal snap ring pliers, remove seal seat snap
ring. Remove seal seat and discard. Using a seal pick, remove "O" ring from inside groove of shaft seal housing. Discard "O" ring.
2. To remove shaft seal, push down and turn clockwise on seal remover to engage tangs. Slowly draw seal from bore. Discard seal. Check
shaft and inside of compressor neck for dirt or foreign material and ensure these areas are perfectly clean before installing new seal.
3. To install, reverse removal procedure. Coat "O" ring, shaft seal, and seal seat with new refrigerant oil.
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Fig. 5: Diesel Kiki 6
-Cylinder Compressor
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
FORD FX-15 CLUTCH R & I
Removal
1. Using Clutch Holder (00 41 0812 05), remove clutch plate retaining bolt and discard. Using an 8 mm bolt threaded into clutch plate,
remove clutch plate and shim(s). See Fig. 6
.
2. Remove snap ring and pulley assembly. Install Shaft Protector (49 UN01 47) over shaft seal opening. Use a 2-jaw puller to remove
clutch coil from compressor.
Installation
1. Ensure clutch coil mounting surface is clean. Use Coil Installer (49 UN01 046) and 2-jaw puller engaged to rear side of compressor
front mounts to press coil into place.
2. Install pulley assembly. Install pulley assembly snap ring with bevel side of snap ring facing out. Install shim(s) and clutch plate. Install
a NEW clutch plate retaining bolt and tighten to 96-120 INCH lbs. (11-14 N.m).
3. Use a feeler gauge to check clearance between clutch plate and pulley assembly. Clearance should be .018-.033" (.46-.84 mm). If
clearance is incorrect, add or remove shims as necessary.
FORD FX-15 SHAFT SEAL R & I
Removal
1. Using Clutch Holder (000 41 0812 05), remove clutch plate retaining bolt and discard. Using an 8 mm bolt threaded into clutch plate,
remove clutch plate and shim(s). See Fig. 6
.
2. Remove shaft felt seal. Thoroughly clean seal area of compressor. Remove shaft seal retaining snap ring. Position Shaft Seal Remover
(49 UN01 044) over compressor shaft.
3. Push shaft seal remover downward against seal. Ensure end of shaft seal remover is engaged with inside of seal. Rotate shaft seal
remover clockwise to expand remover tip inside seal. Pull shaft seal from compressor.
Installation
1. Lubricate shaft seal protector and shaft seal with refrigerant oil. Install shaft seal on shaft seal protector so lip seal is toward compressor
(large end of shaft seal protector).
2. Install shaft seal protector on compressor shaft. Using shaft seal installer (49 UN01 043), push shaft seal down seal protector until seal
is seated.
3. Remove shaft seal installer and protector. Install a NEW shaft seal retaining snap ring and shaft seal felt. Install shim(s) and clutch plate.
Install a NEW clutch plate retaining bolt and tighten to 91-120 INCH lbs. (11-14 N.m).
4. Use a feeler gauge to check clearance between clutch plate and pulley assembly. Clearance should be .018-.033" (.46-.84 mm). If
clearance is incorrect, add or remove shims as necessary.
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Fig. 6: Exploded View of Compressor Clutch (Ford FX
-15)
Courtesy of MAZDA MOTORS CORP.
HARRISON R4 4-CYL CLUTCH R & I
Removal
1. Clamp Holding Fixture (J-25008-A) in a vise and attach compressor to holding fixture with thumb screws. Use Clutch Hub Holder (J-
33027) to hold clutch. Remove shaft nut using Shaft Nut Socket (J-9399).
2. Thread Clutch Plate and Hub Assembly Remover (J-33013-B) into hub. Hold body of remover with a wrench and turn center screw into
remover body to remove clutch plate and hub assembly. Remove shaft key and retain for assembly. See Fig. 5
.
Installation
1. Install shaft key into hub key groove. Allow key to project approximately 1/8" out of key way. Shaft key is curved slightly to provide an
interference fit in hub key groove.
2. Ensure frictional surface of clutch plate and clutch rotor are clean before installing clutch plate and hub assembly. Align shaft key with
shaft key way and place clutch plate and hub assembly onto compressor shaft.
3. Hold hex portion of Installer (J-9480-B) with a wrench. Tighten center screw to press hub into shaft until there is .020-.040" (.5-1.0
mm) air gap between frictional plate and clutch rotor.
4. Install new shaft nut with small diameter boss of nut against crankshaft shoulder. Use Thin Wall Socket (J-9399) and Clutch Hub
Holder (J-25030). Tighten shaft nut to 10 ft. lbs. (14 N.m). Spin pulley rotor by hand to ensure rotor is not rubbing on clutch drive
plate.
HARRISON R4 4-CYL SHAFT SEAL R & I
Removal
1. Clamp Holding Fixture (J-25008-A) in a vise and attach compressor to holding fixture with thumb screws. Use Clutch Hub Holder (J-
33027) to hold clutch. Remove shaft nut using Shaft Nut Socket (J-9399).
2. Thread Clutch Plate and Hub Assembly Remover (J-33013-B) into hub. Hold body of remover with a wrench and turn center screw into
remover body to remove clutch plate and hub assembly. Remove clutch plate and shaft key. Pry out dust seal (if equipped). Remove seal
seat snap ring. Thoroughly clean compressor neck area and "O" ring groove surrounding shaft. Any dirt or foreign material may cause
compressor damage.
3. Use Seal Remover/Installer (J23128-A), remove seal with a twisting motion. Use "O" Ring Remover (J-9553-01) to remove "O" ring.
Installation
1. Coat new shaft seal with refrigerant oil and install shaft seal on remover/installer. Align compressor shaft machined surface with shaft
seal and install. Turn remover/installer slightly counterclockwise to secure shaft seal tangs.
2. Using Seal Installer (J-33011), install "O" ring and coat with refrigerant oil. Coat seal seat with refrigerant oil and install using seal seat
remover/installer. Install snap ring. Install dust seal (if supplied in seal kit). See Fig. 7
.
NOTE:DO NOT drive or pound on clutch hub or shaft.
Page 7 of 18 MITCHELL 1 ARTICLE - A/C COMPRESSOR SERVICING 1991 GENERAL SERVICING Compressor Service
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Fig. 10: Hitachi 6-Cylinder Compressor Shaft Seal Seat Removal
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig. 11: Hitachi 6
-Cylinder Compressor Shaft Seal Removal
Courtesy of NISSAN MOTOR CO., U.S.A.
Inspection
Check carbon seal surface of shaft seal for damage. Check "O" ring and carbon seal contact surface of shaft seal seat for damage. Make sure
that "O" ring contact surface on front cover is not damaged. Make sure refrigerant oil is applied to oil seal in shaft seal seat.
Installation
1. To install, reverse removal procedure. Ensure shaft seal contact surface is free of dirt. Lubricate with refrigerant oil. Cap end of
compressor shaft.
2. Using Guard (KV994C1143), insert shaft seal. Be sure shaft seal case is aligned with shaft. Apply force to turn seal to left and right.
Ensure shaft seal seats properly in shaft cut-out.
3. Fit "O" ring to outside groove of shaft seal seat. Ensure "O" ring seats properly. Apply refrigerant oil on contact surfaces and around
shaft seal seat. Lightly coat surface of shaft with refrigerant oil.
4. Install key on compressor shaft. Using snap ring pliers, compress retainer ring and fit retainer ring into front cover. Seat retainer ring
firmly in groove. Thoroughly wipe grease or oil from shaft surface.
5. Connect Installer (KV99412329) to shaft of compressor, and turn shaft 5 or 6 times in a clockwise direction to seat seal. See
REFRIGERANT OIL & R-12 SPECIFICATIONS chart in this section for system capacities.
MATSUSHITA ROTARY VANE CLUTCH R & I
Removal & Installation
1. Insert two 5 mm bolts into threaded holes in armature. Using a screwdriver as lever in between bolts, remove center bolt. remove
armature and shim from shaft.
2. Remove snap ring. Using a puller, remove pulley. Disconnect electrical leads from field coil. Remove 3 field coil mounting bolts.
Remove field coil. See Fig. 12
. To install, reverse removal procedure.
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Fig. 17: Sanden Scroll Compressor

Courtesy of CHRYSLER MOTORS.
SANDEN 5-CYL CLUTCH R & I
Removal
1. Hold clutch hub stationary and remove shaft nut. Remove clutch plate using puller. Remove external front housing snap ring and
internal bearing snap ring. See Fig. 16
.
2. Install puller and pull rotor assembly off. remove 3 screws and clutch coil. Use driver and hammer to drive bearing out from hub.
Installation
1. Install new bearing; ensure installer contacts outer race of bearing. Install snap ring and ensure bearing turns freely. Install clutch coil on
compressor.
2. Support compressor on rear mounting ears. Align rotor on front housing hub. Use adapter and press to install rotor (or drive into place
with soft mallet). After rotor is seated, install front snap ring.
SANDEN 5-CYL SHAFT SEAL R & I
Removal
1. Hold clutch hub stationary and remove shaft nut with thin wall socket. Use clutch plate puller to remove clutch plate. Tap key out of
slot in crankshaft.
2. Remove seal retainer with seal remover and 3/4" socket wrench. Use seal seat remover tongs to pull seal seat off compressor shaft. Insert
seal remover into front housing and turn to engage tangs on seal. Lift seal out. Remove seal "O" ring from front housing, being careful
not to scratch shaft.
Installation
1. Coat "O" ring with refrigerant oil and install into groove. Load a new seal onto installer, being careful not to touch carbon sealing
surface with fingers. Install shaft protector. Dip seal in refrigerant oil and install on shaft. Rotate seal clockwise until seal fits into flats
on shaft. Remove seal installer by turning counterclockwise.
2. Coat seal seat with refrigerant oil and install with tongs. Reinstall seal seat retainer (with flat side down). Install shims and shaft key.
Rotate shaft several times to help break in seal.
3. Use a press to install clutch plate. Make sure that air gap is .016-.031" (.41-.79 mm). Hold plate stationary and install shaft n u t .
NOTE:Check com pressor refrigerant oil level when replacing seals.
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