Isuzu N-Series. Manual — part 380
6B-14 ENGINE COOLING
DRIVE BELT ADJUSTMENT
Component
Inspection
Check drive belts for wear or damage, and replace with
new ones as necessary. Check belts for tension, and
adjust as necessary.
1. Check drive belts tension
2. Push the middle of belts with a force of 98 N (10 kg
/ 22 lb) and check each belt for deflection.
3. Standard deflection
Legend
1. A/C compressor
4. Crank pulley
2. Tension pulley
5. Compressor drive belt
3. Adjust bolt
6. Generator drive belt
N6A1648E
Fan Drive Belt Deflection
mm (in)
New belt
8 — 12 (0.31 — 0.47)
Reuse belt
10 — 14 (0.39 — 0.55)
A/C Drive Belt Deflection
mm (in)
New belt
16 — 20 (0.63 — 0.79)
Reuse belt
18 — 22 (0.71 — 0.87)
N6A0816E
ENGINE COOLING 6B-15
Tension Adjustment
(Refer to the illustration on the previous page.)
1. Generator & Water Pump Pulley Drive Belt
1) Loosen the Air Conditioning (A/C) drive belt
tension pulley adjust bolt and lock nut (D). Then
free the A/C drive belt.
2) Loosen the adjust plate lock nut (B), the fixing
bolt (A), and the fixing bolts (C) on the lower
side of the generator.
3) Rotate the adjust bolt to adjust the belt.
4) After adjustment, tighten each section to the
specified torque.
Tighten:
Bolt and nut to
• (A): 46 N
⋅m (4.7 kg⋅m / 34 lb⋅ft)
• (B): 24 N
⋅m (2.4 kg⋅m / 17 lb⋅ft)
• (C): 40 N
⋅m (4.1 kg⋅m /30 lb⋅ft)
5) Adjust the A/C drive belt tension.
2. A/C Compressor Drive Belt
1) Loosen the tension pulley lock nut (D), and ro-
tate the adjust bolt to adjust the belt.
When finishing the fan drive belt adjustment,
then adjust the A/C drive belt.
After adjustment, tighten the lock nut (D) to the
specified torque.
Tighten:
Lock nut (D) to 27 N
⋅m (2.8 kg⋅m / 20 lb⋅ft).
Legend
1. Belt deflection
6B-16 ENGINE COOLING
FUEL SYSTEM 6C-1
ENGINE 4H SERIES
SECTION 6C
FUEL SYSTEM
Contents
GENERAL DESCRIPTION . . . . . . . . ...6C-2
FUEL FILTER ASSEMBLY (Except 4HF1-2 model) . .6C-9
FUEL FILTER ASSEMBLY (4HF1-2 model only) ...6C-12
INJECTION NOZZLE ASSEMBLY. . . . . ..6C-14
INJECTION PUMP ASSEMBLY (Except 4HF1-2 model) . .6C-33
INJECTION PUMP ASSEMBLY (4HF1-2 model only) . 6C-40
Component . . . . . . . . . . . . . ..6C-40
Installation . . . . . . . . . . . . . ...6C-40
INJECTION TIMING ADJUSTMENT . . . . ..6C-45
INJECTION PUMP DATA . . . . . . . . ...6C-49
ANEROID COMPENSATOR ADJUSTMENT . .6C-71
Component . . . . . . . . . . . . . ..6C-71
INJECTION VOLUME ADJUSTMENT. . . . 6C-72
4HE1-TC (4HE1-XS) Engine for EURO3 . . 6C-72
FUEL TANK . . . . . . . . . . . . . . 6C-79
FUEL GAUGE UNIT . . . . . . . . . . ... 6C-81
ACCELERATOR CONTROL CABLE . . . . . 6C-82
ACCELERATOR PEDAL. . . . . . . . . 6C-84
IDLING CONTROL CABLE . . . . . . . . 6C-85
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