service NISSAN 300ZX 1984 Z31 Heather And Air Conditioner Workshop Manual

HEATER &
AIR CONDITIONER
I v __I_--
SECTION HA^ I
CONTENTS
GENERAL DESCR I PTlON . ... .. . HA- 2
AIR FLOW AND COMPONENT LAYOUT
. .. . .. HA- 3
DOOR CONTROL .. 1.. .. HA- 6
LOCATION OF VACUUM COMPONENTS ... HA- 5
HEATER ELECTRICAL CIRCUIT. . . . . .. HA- 7
DESCRIPTION-Air Conditioner (Manual) . ... ..
A/C PERFORMANCE TEST ..
DISCHARGING, EVACUATING, CHARGING AND CHECKING
PRECAUTIONS FOR REFRIGERANT CONNECTION .
PIPING, COMPRESSOR MOUNTING AND F.1 C D.
COMPRESSOR OIL-ForMJS170
. . .. ..
COMPRESSOR-Model MJS170 .. ..
A/C ELECTRICAL CIRCUIT (Manual) . .. ..
A/C ELECTRICAL COMPONENTS (Manual) ..
LOCATION OF A/C ELECTRICAL COMPONENTS ....
SERVICE DATA AND SPECIFICATIONS (S D S ) . .
SPECIAL SERVICE TOOLS .. ..
HA- 9
HA-12
HA-18
HA-20
. HA-21
HA-23
HA-25
. HA-30
.. HA-32
. HA-34
.. HA-35
. HA-38

DISCHARGING, EVACUATING, CHARGING AND CHECKING
Precautions
WARNING:
Always be careful that refrigerant does not
come in contact with your skin.
Always wear
eye protection when working
around the
system
Keep refrigerant containers stored below 50°C
(122" F) and never drop it from a high place
Work
in well-ventilated area because refrigerant
gas evaporates quickly and breathing may be-
come difficult due to the lack of oxygen
Keep refrigerant away from open flames
be-
cause poisonous gas will be produced if it is
burns.
Do not use steam to clean surface of condenser
or evaporator
Be sure to use cold water or
compressed air.
Compressed
air must never be used to clean a
dirty line Clean with refrigerant gas
Do not use manifold gauge whose press point
shape
is different Otherwise, insufficient
evacuating may occur
fJalve press point
NG SHA919A
Do not over-tighten service valve cap.
Do not allow refrigerant to rush out. Other-
wise, compressor oil will
be discharged along
with refrigerant
Discharging
Slowly open the valves to discharge only refriger-
ant If they
are opened quickly, compressor oil will
also be discharged
To low-pressure IerYlCe valve
To high-pressure service valve
*
SHA240B
4c==--J
HA-I 2

DISCHARGING, EVACUATING, CHARGING AND CHECKING
Chargin!
2) Quick charging
Immerse in water heated to about40*C 11W0FI for a Short time
AC184A
CAUTION.
If charging liquefied refrigerant into the system
with the can turned upside down to reduce charg-
ing time, charge it only through high pressure (dis-
charge) service valve. After charging, the compres-
sor should always be turned several times manual-
ly.
To high-pressure sermce valve To low-pressure
SHA244B
5. When refrigerant charging speed slows down,
charge
it while running the compressor for ease
of charging
WARNING:
Never charge refrigerant through high pressure side
(discharge
side) of system since this w~ll force re-
frigerant back into refrigerant can and can may
ex-
plode.
Cont'd)
Run at Idling (Below 1.500 rpml
To high-pressure servlce valve
II
To low-pressure IerUlCe valve
@g Fan lever, made and temperature dial Maximum cool and speed
I? SHAZ~SB
Charge refrigerant while controlling low-pres
sure gauge reading
at 275 kPa (2 8 kg/cm2, 40
psi) or less by turning in or out low-pressure
valve of manifold gauge.
Be sure to purge air from charging hose when
replacing can with a new one.
Charge the specified amount of refrigerant into
system by weighing charged refrigerant with
scale Overcharging will cause discharge pres-
sure
to rise.
Refrigerant amount:
MJS170
0.9 - 1.1 kg (2.0 - 2.4 Ib)
SHA9OOA
HA-I 4

DISCHARGING, EVACUATING, CHARGING AND CHECKING
Charging (Cont'd)
The state of the bubbles in sight glass should only
be used for checking whether the amount of
charged refrigerant is small or not The amount of
charged refrigerant can be correctly judged by
means of discharge pressure.
8 After charging, be sure to install valve cap on
service valve
9 Confirm that there are no leaks in system by
checking with a leak detector
HA-I 5

PIPING, COMPRESSOR MOUNTING AND F.I.C.D.
Refrigerant Lines
10 20110-20.7-14)
Safety valve
Lm 20- 29 (2 0 - 30.14 - 221
m 14 - 18 I1 4.1 8,lO - 131
20 - 29 Low-prerrure (S”Ctl0”)
fYm 1 (20 30.14- service valve
25 -34 (2 5 - 35,18 -251
m N m lkg-m, ft-lb)
SHA246B 0 10-20 I1 0-20.7. 14)J
Compressor Mounting
h
5-7(05 07.36-511i
[91 19-25 I1 9- 25.14.18)
*Adjurting bar
PJ) 36 -49 I3 7.5 0,27.361
(91 19 -25 (1 9.2 5,14.18)
N rn (kg-m, ft-lbl (91 19-2511
Non-turbocharged model
SHA247B
HA-21
>
36.49 I3 7.50.27 - 361 ,
9 - 25.14- 181

COMPRESSOR OIL--For MJS170
Checking and Adjusting
The oil used to lubricate the compressor is circulat-
ing with the refrigerant
Whenever replacing any component of the system
of
a large amount of gas leakage occurs, add oil to
maintain the original amount
of oil
Total amount of oil in the system:
150 mP (5.1 US fl 02, 5.3 Imp fl 02)
KV994A9690
KV992C50822 /
i;(V994A9690 SHAO17A
1
2
3
Connect oil separator KV994A9690 between
compressor discharge
side and condenser
Evacuate and charge the system
Operate compressor
at engine idling with air
conditioner
set for maximum cooling and high
fan speed
4 Stop compressor operation after 10 minutes
Never allow engine speed to exceed idling speed
CAUTION.
Do not continue compressor operation for more
than 10 minutes
5 Disconnect oil separator and connect refriger-
ant line
to original positions
6 Disconnect low flexible hose from compressor
suction
valve
7 Add new oil from compressor suction port
Amount of oil to be added:
120 mP (4.1 US fl oz,4.2 Imp fl 02)
Low pressure ride
SHA702
0 Oil remains unremoved in the system about 30
mP (1.0 US fl 02, 1 1 Imp fl 02).
8 After adding oil, rotate compressor clutch by
hand 5 to 10 turns
9 Connect refrigerant line and evacuate and
charge system
10 Conduct leak
test and performance test
11 Gradually loosen drain cap of oil separator to
release residual pressure Remove cap and drain
Oil
12 To prevent formation of rust and intrusion of
moisture or dust, perform the following before
placing oil separator kit into storage
1) Cap each opening of flexible hose and double
union securely
2) Cap oil separator, evacuate it from service
valve, and charge refrigerant
HA-23

SERVICE DATA AND SPECIFICATIONS (S. D. S.)
General Specifications
COMPRESSOR
Model MJS170
Type Swash plate
Displacement
cm' lcu mllrev 170 110371
Cvllnder bore x stroke mm linl 40 0 x 22 6 I1 57 x 0 891
Clockwse
(viewed
from drive end1 Direcrion of rotafion
Type of driving belt HA type [Cogged belt1
LUBRICATING OIL
Model MJSl70
Type SUNISO 5GS
Capacitv
mP IUS fl OT, Imp fl OLI
Amount Of 011 in the system
Residual 011 level in the
operation and draining
0811
150 15 1.5 31
ryrrem (After 011 return 120141.421
REFRIGERANT
Type R-12
Capacity kg IIbI 09-1 1120-241
ENGINE IDLING SPEED
Non-
model
Turbocharged
model Traosmt6iton turbocharged
When AJC IS OFF MIT rpm 650 750 650 - 750
650 - 750 600.700
'pm at "D', range at "D" range
When AIC 81 ON MIT rpm 750-850 750 - 850
750.850 750.850
'IT at "D" range at "D" range
--Inspection and Adjustment -
COMPRESSOR
Model MJS170
0 5 -0 8 I0020 -00311 Clutch hub to pulley clearance mm lml ~~
BELT
TENSION
Belt deflection I [Apploed Pressure 1s 98 N I10 kg, 22 Ibll
0 4331 0 3541
SHA252B
HA-35

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Tightening Torque
COMPRESSOR INSTALLATION
Compressor bracket to 30 40 3 1 .4 1 22 30
cylinder block
Compressor to compressor 30 40 3141 2230
bracket
Compressor shafl nut 19 21 19-21 14 15
Compressor rear cover 19 21 1921 1415
fixing bolt
REFRIGERANT LINE
When connecting lines made of different material, basically use the lower tightening torque of the two ~~
Union
type (pipe to pipe) Material
Pipe 0 D
mm (in) Steel or copper Aluminum
Nm kg m ft Ib Nm kgm ft-lb ro
6 11/41 10 20 10 20 7 14 - - -
8 15/16) 15-25 15-25 11 18 10 20 10-20 7 14
10 13/81 15 25 15-25 11 18 10 20 10 20 7 14
12 11/21 20 29 20-30 14 22 15 25 15-25 11 18
16 15/81 25 34 25-35 18-25 20-29 20 30 14 22
SHA669A 19 13/4) 25-34 25-35 18 25 20-29 20 30 14-22
Union type (hose to hose) Malerial
Pipe 0 D rnm Iin) Steel or copper Aluminum
Nm kg-m fl-lb Nm kg m ft-lb
6 11/41 10-20 10-20 7-14 - - -
8 15/161 15-25 15-25 11-18 10-20 10 20 7 14
10 13/81 15 25 15-25 11-18 10-20 10 20 7 14
12 11/21 2534 25-35 18-25 20-29 2030 1422
SHA670A I5I8) 25-34 25-35 18-25 20 29 20-30 14-22
HA-36

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Tightening Torque (Cont'd)
Union type (hose to pipel
a Use tightening torcue for flexible hose
SHA671A
Plate type Bolt tYlX Tightening torque
Bolt Nominal Pitch diameter Nm kg-m ft-lb mm (in1 mm lini Grade 112e
M6 6 0 10 2361 1 0 10 0391 3 -4 03-04 22 29
4T M8 80103151 125100492) 8-11 08-11 58 80
M10 10 0 1.3 3941 1 5 IO 0591 16 22 1622 1216
M6 6 0 IO 2361 1 0 IO 0391 6 - 7 06 07 43-51
7T M8 80 10 3151 1 25 I004921 14 18 14-18 1013
M10 100103941 15100591 25 35 26-36 19-26
.3
HA-37'

SPECIAL SERVICE TOOLS
Special tool or a commercial equivalent
Tool number
(Kent-Moore
No )
Tool name
KV99412302
(J24878-1)'
Clutch hub wrench
KV994C5780
(-1
Clutch hub puller
KV994C1143
(-1
Shaft seal remover and
installer
KV994C5784
( - 1.
Shaft seal pilot
KV994 12330
( - )*
Allen socket
KV994C5785
Cylinder head remover
( - )"
KV994A9690
Oil separator kit
(&)
KV992C5079
(-1
0 KV992C5081
(-1
Adapter connector A -
@ KV992C5082
(-)
Adapter connector B
KV994C1552
(-1
Charge nozzle
Tool
0
Tool number
(Kent-Moore
No )
Tool name
KV994C4548
(-)
Blind cover set
0 KV994C4531
(-)
Blind cover
@ KV994C4532
(-)
Gasket
@ KV994C4533
(-1
Gasket (Useless)
@ KV994C4534
(-)
Gasket (Useless)
@ KV994C4559
(-)
Bolt
Tool
HA-38