Mitsubishi 4DQ5 Service Manual download pdf (Page 58)

(3) Remove snap ring (6) from

the

water pump

shaft.

(4) Pull shaft

(8)

off

the pulley

side

on pump case

and remove bearings (7) and (9) from the shaft.

3-2

Inspection

(1) Examine the pump operation by slowly rotating it.

the pump

erratic in rotation, replace the

bearings with new ones.

(2) Visually check the impeller for corrosion or

breakage. Replace a defective impeller.

Also

check

the impeller for signs

rubbing.

such rubbing is

evident, check for the cause. The impeller and

case

or cover,

found damaged due to rubbing, must

be replaced with new ones.

(3)

Check the unit

seal

for condition. Replace the seal

badly worn or damaged.

(4)

Check the pump shaft bearing journals for wear.

Replace the shaft

the journals

are

excessively

worn.

(5)

Check those surfaces

pump

case

to which the

bearings

are

fitted for excessive wear or damage.

Replace the

case

or the pump assembly

the

case

found in bad condition on those surfaces.

[NOTE]

Upon assembling the water pump,

tum

it by

means

the pulley, making sure that the pump

rotation

smooth without signs

binding.

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Mitsubishi 4DQ5 Service Manual Page 58

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