Mitsubishi 6M70 - Cooling System Inspection and Adjustment; Inspection and Adjustment of Belt Tension; On-Vehicle Inspection and Adjustment

14-6
1. Inspection and Adjustment of Belt Tension
CAUTION
• Be careful not to allow engine oil to smear the belt. A belt smeared with oil slips, resulting in reduced
cooling efficiency.
• When replacing the belts, replace them as a set to prevent differences in tension between the two belts.
Service standards (Unit: mm)
Tightening torque (Unit: N·m {kgf·m})
Special tools
Inspection after installation
Inspection: Tension of belts
• Press each belt at a central portion between pulleys with a force
of approximately 98 N {10 kgf} as shown in the illustration and
measure the amount of deflection of the belt.
A: Alternator pulley
B: Compressor pulley (for air conditioner)
C: Water pump pulle
y
D: Crankshaft pulley
• Place the small O-ring on at the scale mark corresponding
to 98 N {10 kgf} (press force).
• Place the large O-ring on at the scale mark corresponding
to the maximum permissible deflection value specified for the
belt.
Location Maintenance item Standard value Limit Remedy
– Belt tension
For air conditioner 15 to 20 – Adjust
For alterna-
tor
When new 19 to 24
– Adjust
When reused 25 to 30
Mark Parts to be tightened Tightening torque Remarks
– Nut (for alternator retention) 82 {8.4} –
– Bolt (for cooler compressor retention) 19.6 to 24.5 {2.0 to 2.5} –
Mark Tool name and shape Part No. Application
Belt tension gauge MH062345 Measurement of tension of belt
ON-VEHICLE INSPECTION AND ADJUSTMENT