Adjusting The Low And High Idle Speeds - Mitsubishi diesel engines Service Manual

ENGINE - INSPECTION / ADJUSTMENT, RUNNING-IN TRIAL AND PERFORMANCE TEST

1.8 Adjusting the low and high idle speeds

(1)
Preparations
(a)
Warm up the engine until the coolant
temperature reaches 60• Ž
Note: Ensure that the valve clearance and the fuel
injection timing are correctly adjusted and that
the nozzles operate normally.
(2) Adjusting the low idle speed
Loosen the lock nut for the idling set bolt. Screw
in or out the bolt to set the low idle speed to
specification. Tighten the lock nut.
Low idle speed
(3)
Adjusting the high idle speed
Loosen the lock nut for the high speed set bolt.
Screw in or out the bolt to set the high idle speed
to specification. Tighten the lock nut.
High idle speed
8 - 8
(140• ‹ ‚ e ) or above.
-1
1000• } 25 min
+30
-1
2700 min
-10
High speed Low speed position
position (low idle)
Lock nut
Adjusting the idle speeds
Idling set bolt
High speed set bolt