Mitsubishi S12A2 User Manual

13-6
Chapter 13 ADJUSTMENT AND OPERATION
1.5 Belt and Belt Tension - Inspect and Adjust
1.5.1 Belt - Inspect
(1) Inspect the belt visually for separation or damage.If any defect is found, replace the belt with a new one.
(2) Inspect the tension (deflection) and pressing force of belt.
V-belt
Inspect the V-belt deflection by pressing it with approx 98 to 147 N {10 to 15 kgf} [22 to 33 lbf] force at the center of its span.
The belt deflection of 10 to 15 mm [0.39 to 0.59 in.] is normal.
If the deflection is out of standard, adjust the belt tension.
Ribbed belt
Refer to the table below. If the pressing force is not meet the standard, when pushing in the middle of pulleys with the gauge
and the belt deflection is 15 mm [0.59 in.], adjust the belt tension.
1.5.2 Belt Tension (Fan) - Adjust
V-belt drive
(1) Remove the belt cover.
(2) Loosen all the fixing bolts of fan bracket.
(3) Turn the tension bolt to adjust the belt tension.
(4) Secure the tension bolt with lock nut.
(5) Tighten all the fixing bolts of fan bracket.
(6) Install the belt cover.
Fan Belt (V-belt Drive) Tension - Adjust
Ribbed belt drive
(1) Remove the belt cover.
(2) Loosen all the fixing bolts of tension bracket.
(3) Turn the tension bolt to adjust the belt tension.
(4) Secure the tension bolt with lock nut.
(5) Tighten all the fixing bolts of tension bracket.
(6) Install the belt cover.
Fan Belt (Ribbed Belt Drive) Tension - Adjust
If any defects such as cuts or surface separations are found during inspection, replace the belt with a new one.
Keep the belt free from oil and grease.Oil or grease causes the belt to slip and shorten the service life.
Excessive belt tension can cause rapid wear of alternator bearing and shorten the service life of belt. Adjust the belt
tension correct following the procedures below:
Lock nut
Fan pulley
Tension bolt
Fixing bolt (4 places)
10 to 15 mm
10 to 15 mm
[0.39 to 0.59 in.]
[0.39 to 0.59 in.]
10 to 15 mm
[0.39 to 0.59 in.]
15 mm
[0.59 in.]
Ribbed belt
Thrust force
Gauge width
approx. 10 mm [0.39 in.]
Gauge
Tension pulley
Fan pulley
Crankshaft pulley
Tension bolt
Fixing bolt (4 places)
Lock nut

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English