1998 NISSAN PICK-UP Repair Manual

8. Set the heater A/C control as follows:
a. A/C switch ON
b. Face mode
c. Recirculation switch ON
d. Max cold temperature
e. Fan speed high
9. Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps
4 through 6 above.
Refrigerant leaks should be checked immediately after stop-
ping the engine. Begin with the leak detector on the high
pressure line. The pressure in the high pressure line will
gradually drop after refrigerant circulation stops and pres-
sure in the low pressure line will gradually rise, as shown in
the graph. Leaks are more easily detected when pressure is
high.
11. Discharge A/C system using approved refrigerant recovery
equipment. Repair the leaking fitting or component as nec-
essary.
12. Evacuate and recharge A/C system and perform the leak test
to confirm no refrigerant leaks.
13. Conduct A/C performance test to ensure system works prop-
erly.
Compressor Mounting
SHA839E
RHA376G
SERVICE PROCEDURES
Checking Refrigerant Leaks (Cont'd)
HA-58

RHA378G
.TD engine model
.
.
SERVICE PROCEDURES
Compressor Mounting (Cont'd)
HA-59

Compressor Ð DKV-14C (ZEXEL make)
Compressor Clutch Ð DKV-14C
(ZEXEL make)
REMOVAL
lWhen removing center bolt, hold clutch disc with clutch disc
wrench.
lRemove the clutch disc using Tool KV99232340.
Insert holder's three pins into the clutch disc. Rotate the
holder clockwise to hook it onto the plate. Then, tighten the
center bolt to remove the clutch disc.
When tightening the center bolt, insert a round bar
(screwdriver, etc.) between two of the pins (as shown in the
left-hand figure) to prevent clutch disc rotation. After remov-
ing the clutch disc, remove the shims from either the drive
shaft or the clutch disc.
lRemove the snap ring using external snap ring pliers.
SHA878E
RHA366G
RHA367G
AHA843
SERVICE PROCEDURES
HA-60

lPulley removal
Use any commercially available pulley puller. Position the
center of it on the end of the drive shaft, and remove the
pulley assembly.
For pressed pulleys:
To prevent deformation of the pulley groove, the puller
claws should be hooked under (not into) the pulley groove.
For machine latched pulleys:
Align the pulley puller groove with the pulley groove, and
then remove the pulley assembly.
lRemove the field coil harness clip using a screwdriver.
lRemove the three field coil fixing screws and remove the field
coil.
INSPECTION
Clutch disc
If the contact surface shows signs of damage due to excessive
heat, replace clutch disc and pulley.
Pulley
Check the appearance of the pulley assembly. If the contact
surface of the pulley shows signs of excessive grooving, replace
both the pulley and clutch disc. The contact surfaces of the pul-
ley assembly should be cleaned with a suitable solvent before
reinstallation.
Coil
Check coil for loose connection or cracked insulation.
INSTALLATION
lInstall the field coil.
lBe sure to align the coil's pin with the hole in the com-
pressor's front head.
lInstall the field coil harness clip using a screwdriver.
RHA368G
RHA074C
RHA075C
RHA076C
SERVICE PROCEDURES
Compressor Clutch Ð DKV-14C
(ZEXEL make) (Cont'd)
HA-61

lInstall the pulley assembly using the installer and a hand
press, and then install the snap ring using snap ring pliers.
lInstall the clutch disc on the drive shaft, together with the
original shim(s). Press the clutch disc down by hand.
lUsing the holder to prevent drive plate rotation, tighten the
bolt to 12 to 15 (1.2 to 1.5 kg-m, 9 to 11 ft-lb) torque.
lAfter tightening the bolt, check that the pulley rotates
smoothly.
lCheck clearance around the entire periphery of clutch disc.
Disc-to-pulley clearance:
0.3 - 0.6 mm (0.012 - 0.024 in)
If the specified clearance is not obtained, replace adjusting
spacer and readjust.
BREAK-IN OPERATION
When replacing compressor clutch assembly, always conduct
the break-in operation. This is done by engaging and disengag-
ing the clutch about thirty times. Break-in operation raises the
level of transmitted torque.
RHA369G
RHA373G
RHA370G
RHA377G
SERVICE PROCEDURES
Compressor Clutch Ð DKV-14C
(ZEXEL make) (Cont'd)
HA-62

Thermal Protector Ð DKV-14C (ZEXEL make)
INSPECTION
lWhen servicing, do not allow foreign matter to get into com-
pressor.
lCheck continuity between two terminals.
AHA849
SERVICE PROCEDURES
HA-63

Compressor Ð DKS-17CH (ZEXEL make)
Compressor Clutch Ð DKS-17CH
(ZEXEL make)
REMOVAL
lWhen removing center bolt, hold clutch disc with clutch disc
wrench.
lRemove the drive plate using Tool.
Insert holder's three pins into the drive plate. Rotate the
holder clockwise to hook it onto the plate. Then, tighten the
center bolt to remove the drive plate.
After removing the drive plate, remove the shims from either
the drive shaft or the drive plate.
lRemove the snap ring using external snap ring pliers.
SHA049F
SHA792E
SHA793E
SHA794E
SERVICE PROCEDURES
HA-64

lPulley removal
Use any commercially available pulley puller and tool. Posi-
tion the center of it on the end of the tool, and remove the
pulley assembly.
For pressed pulleys
To prevent deformation of the pulley groove, the puller
claws should be hooked under the pulley (not into the
groove). For machine latched pulleys
Align the pulley puller groove with the pulley groove,
and then remove the pulley assembly.
lRemove the three field coil fixing screws and remove the field
coil.
INSPECTION
Clutch disc:If the contact surface shows signs of damage due
to excessive heat, replace clutch disc and pulley.
Pulley:Check the appearance of the pulley assembly. Check
the contact surface of the pulley for any sign of excessive groov-
ing due to slippage. If any sign is found, replace both the pulley
and clutch disc. The contact surfaces of the pulley assembly
should be cleaned with a suitable solvent before reinstallation.
Coil:Check coil for loose connection or cracked insulation.
INSTALLATION
lInstall the field coil.
Be sure to align the coil's pin with the hole in the compres-
sor's front head.
lInstall the pulley assembly using the installer and a hand
press, and then install the snap ring using snap ring pliers.
SHA050F
SHA051F
RHA075C
SHA051F
SHA797EA
SERVICE PROCEDURES
Compressor Clutch Ð DKS-17CH
(ZEXEL make) (Cont'd)
HA-65