Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 292

<Vehicles with A/C>
Power steering
oil pump pulley
Crank-
A
shaft
pulley
<Vehicles without
A/C>
Power steering
oil pump pulley
Crank-
shaft
A
pulley
ENGINE <4G9> –
POWER STEERING OIL PUMP AND AIR CONDITIONER
COMPRESSOR DRIVE BELT TENSION CHECK AND
ADJUSTMENT
1. Check the drive belt tension by the following procedure.
Tension
pulley
B
A/C
compressor
pulley
B
Tension
pulley
2. If outside the standard value, adjust by the following
On-vehicle Service
<When using the MUT-II>
Gently tap the middle of the belt between the pulleys (the
place indicated by the arrow) with your finger as shown
in the illustration, and check that the vibration frequency
of the belt is within the standard value range.
NOTE
Refer to P.11A-7 for details on the method of measuring
the vibration frequency using the MUT-II.
<When using a tension gauge>
Use a belt tension gauge to check that the belt tension
is within the standard value.
<Belt deflection check>
Apply 98 N of force to the middle of the drive belt between
the pulleys (at the place indicated by the arrow) and check
that the amount of deflection is within the standard value.
Standard value:
Items When
checked
Vibration 114 – 139
frequency
Hz
Tension N 392 – 588
Deflection 10.0 – 12.0
(Reference
value) mm
procedure.
(1) Loosen the tensioner pulley fixing bolt A.
(2) Adjust the amount of belt deflection using adjusting
bolt B.
(3) Tighten the fixing bolt A
Tightening torque: 25 Nm
(4) Check the belt deflection amount and tension, and
readjust if necessary.
Caution
Check after turning the crankshaft once or more
clockwise (right turn).
11A-9
When a used When a new
belt is installed belt is installed
121 – 133 145 – 166
441 – 539 637 – 833
10.0 – 11.0 7.0 – 9.0