Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 43 / 1164

ENGINE <4G6> -
On-vehicle Service
11A-9
POWER STEERING OIL PUMP AND AIR CONDITIONER
COMPRESSOR DRIVE BELT TENSION CHECK AND
ADJUSTMENT
11100130127
1. Check if the belt tension is within the standard value
using one of the methods below.
Standard value:
Items When
checked
When a
used belt is
installed
When a new
belt is
installed
Vibration
frequency
Hz
108 - 132 114 - 126 137 - 157
Tension N 392 - 588 441 - 539 637 - 834
Deflection
(Reference
value) mm
11.7 - 15.3 12.5 - 14.3 8.8 - 11.0
<When measuring the vibration frequency>
With your finger tip lightly tap the centre of the belt between
the pulleys in the location shown by the arrow in the
illustration and then measure the belt vibration frequency.
NOTE
Refer to P.11A-7 for information regarding the vibration
frequency measurement method using MUT-
II
.
<When measuring the tension>
Use a belt tension gauge to measure the belt tension.
<When measuring the deflection>
Apply 98 N of pressure against the location between
the pulleys shown by the arrow in the illustration and
then measure the deflection.
2. If the tension or deflection is outside the standard value,
adjust by the following procedure.
(1) Loosen tensioner pulley fixing nut A.
(2) Adjust the amount of belt deflection using adjusting
bolt B.
(3) Tighten fixing nut 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).
<Vehicles without A/C>
Oil pump pulley
98 N
Crankshaft
pulley
Tensioner pulley
A
B
98 N
Crankshaft
pulley
Tensioner
pulley
A
B
A/C
compressor
pulley
<Vehicles with A/C>
Oil pump pulley