Mitsubishi S12A2 User Manual

13-12
Chapter 13 ADJUSTMENT AND OPERATION
3. Engine-Test and Adjustment
After the break-in operation is completed, and the engine runs normally, check and adjust the performance and functions of the
engine.
Record the test results referring to the engine data of delivery time.
3.1 Engine Performance Test
Fuel consumption rate, various temperatures and pressures,
and exhaust color
3.2 Emission Gas Test
Exhaust gas analyses
3.3 Governor Performance Test
Minimum speed at no-load (low idle) - set
Maximum speed at no-load (high idle) - set
Load sudden application and rejection tests
Governor droop, hunting, and rotational fluctuation - check
Setting conditions of governor controller and others - check
3.4 Alarm Action and Emergency Stop Tests
Oil pressure decrease, water temperature increase, and over-
speed
3.5 Maximum Fuel Injection Volume - Set
Left side pump
(1) Run the engine under the maximum rated speed.
(2) Loosen the lock nut located on the edge of rack stopper.
(3) Fix the lock nut in a position where the stopper comes
in contact with the end face of rack plate.
Maximum Fuel Injection Volume (Left Side) - Set
Right side pump
(1) Run the engine under the maximum rated speed.
(2) Remove the cap, and loosen the outer nut.
(3) Loosen or tighten the inner nut until it is firmly engaged
in place with a clicking sound.
(4) Tighten the outer nut, and install the cap.
Maximum Fuel Injection Volume (Right Side) - Set
(a) Engine test, adjustment and seal shall be performed at the certified maintenance shop only.
When the seal of engine is to be done at a service shop other than the certified shops, ask a certified shop for
the presence of qualified person for the test, adjustment and seal.
(b) Performance check and adjustment of the engine shall be conducted when the water and oil temperatures
become stable after sufficient warm-up operation.
Pump rack
zero position
Maximum load
rack position
Left
Stopper
Rack plate
Increase
Decrease
Lock nut
Right
Inner nut
Outer nut
Rack
Cap
Increase
Decrease
Maximum load
rack position

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English