Isuzu 4LE2, Workshop Manual

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86
COOLING SYSTEM
REASSEMBLY
Bearing unit
With a hole in the bearing unit set in line with one in the
body, lock the bearing unit with a setscrew.
N·m (kgf·m/ft. lb)
Align holes
Bearing unit
Fan center
Body
Setscrew
Set screw tightening torque 8 - 12 (0.8 – 1.2 / 6 – 9)
Seal unit
Impeller
1. Apply BELCO bond No. 4 to the surface where the
seal unit comes into contact with the body, and then
assemble the seal unit.
2. Press in the impeller with a press until the clearance
between the pump impeller and the body gets to the
specified value.
Impeller
Seal unit
Cover
1. Apply sealant to the surface to which the cover is
installed, and then install the cover.
2. Apply Screw-lock to the cover installation screws,
and then tighten them.
Cover
Clearance, play and tightening allowance between parts
1. Clearance between the pump impeller and the body
mm (in)
2. Play in the water pump ball bearing
mm (in)
3. Tightening allowance between the fan center and
the bearing shaft
mm (in)
Standard 0.026 – 0.061 (0.001 – 0.0024)
Standard 0.53 – 2.17 (0.0209 – 0.0854)
Standard Limit
0.008 – 0.010 (0.0003 – 0.0004) 0.2 (0.0079)
Fig. 176
Fig. 177
Fig. 178