Isuzu N-Series. Manual — part 53
1A-6 HEATING AND VENTILATION
ON-VEHICLE SERVICE
Heater Unit/Heater Core
Legend
1. Instrument panel assembly
7. Water hose
2. Defroster nozzle and ventilation duct
8. Bolt (Panel - Heater unit)
3. Heater control cable
9. Bolt (Heater unit - Reinforce)
4. Foot duct
10. Heater unit
5. Duct (NPR only)
11. Heater core
6. Front grille
N1A0020E
HEATING AND VENTILATION 1A-7
Removal
Preparation:
Disconnect the battery ground cable.
1. Instrument Panel Assembly
Refer to Section 2 “CAB AND FRAME” for Instru-
ment Panel Assembly removal procedure.
2. Defroster Nozzle and Ventilation Duct
Refer to “DEFROSTER NOZZLE / VENTILATION
DUCT” removal procedure in this section.
3. Heater Control Cable
Disconnect the cables from the heater unit.
4. Foot Duct
5. Duct (NPR only)
6. Front Grille
7. Water Hose
• Loosen the water hose clips and disconnect the
water hoses from the heater unit.
• Put caps to the openings of the heater unit and
the water hoses to prevent a lot of engine cool-
ant from spilling out of them.
8. Bolt (Panel - Heater Unit)
9. Bolt (Heater Unit - Reinforce)
10. Heater Unit
• Drop the heater unit positioning pins from the
reinforce, and remove the heater unit while slid-
ing the engaged section between the evapora-
tor and the heater unit.
11. Heater Core
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
1. Adjust the heater control cable.
Refer to “CONTROL LEVER ASSEMBLY” installa-
tion procedure in this section.
2. When installing the heater unit, defroster nozzles
and ventilation ducts, be sure that proper seal is
made, without any gap between them.
3. Check the engine coolant level. When the level is
below the specified amount, replenish engine cool-
ant to the proper level.
Legend
1. Water hose clip
2. Bolt
N1A0021E
Legend
1. Pin
2. Reinforce
3. Fixing bolt (Heater unit - Reinforce)
N1A0022E
1A-8 HEATING AND VENTILATION
Heater Temperature Control Link Unit/Air Mix Door
Removal
Preparation:
Disconnect the battery ground cable.
1. Heater Unit
Refer to “HEATER UNIT” removal procedure in this
section.
2. Rod
3. Door Lever
Pull out the door lever while raising up the catch of
the door lever.
4. Foot Duct
5. Upper Case
Separate two halves of the upper case.
6. Air Mix Door
7. Mix Sub Lever
Press the tab of the sub lever inward, and take out
the sub lever.
Installation
To install, follow the removal steps in the reverse order.
Legend
1. Heater unit
6. Air mix door
2. Rod
7. Mix sub lever
3. Door lever
8. Mode door
4. Foot duct
9. Heater core
5. Upper case
N1A0023E
HEATING AND VENTILATION 1A-9
Heater Mode Control Link Unit/Mode Door
Removal
Preparation:
Disconnect the battery ground cable.
1. Heater Unit
Refer to “HEATER UNIT” removal procedure in this
section.
2. Screw
3. Washer and Mode Main Lever
4. Rod
5. Door Lever
Pull out the door lever while raising up the catch of
the door lever.
6. Foot Duct
7. Upper Case
8. Mode Door
9. Mode Sub Lever
Press the tab of the sub lever inward, and take out
the sub lever.
Installation
To install, follow the removal steps in the reverse order.
Legend
1. Heater unit
6. Foot duct
2. Screw
7. Upper case
3. Washer and mode main lever
8. Mode door
4. Rod
9. Mode sub lever
5. Door lever
10. Heater core
N1A0024E
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