Mikasa MT-76D, Instruction Manual

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1. Diesel Engine

Intake/exhaust valve upthrust

Decompressor adjustment problems

(1) Starting Problem

(2) Insufficient Output and Operation Problems

Contact with seat not close enough.

Piston ring wear

Cylinder wear

Cylinder, cylinder head mating surface problems

Nozzle seat looseness

No compression at all

Almost no compression

Clogging of the tank cap air hole.

Clogging of the fuel filter

Fuel cock not open

Air inside the fuel pipe

Fuel flow low or no flow

Injection pump barrel, plunger stuck

Nozzle hole clogging

Nozzle needle stuck

Fuel not injected inside the combustion chamber

Inappropriate starting operations

Engine oil viscosity high, engine oil is very dirty.

Air trapped inside the fuel pipe.

Does not reach the starting revolution.

Governor fork and sleeve mating surface problems

Governor spring problems

Fly plate and sliding part wear and operation problems

Revolution fluctuation

Valve open/close timing inappropriate

Clogged exhaust hole, muffler

Overload

Engine revolution does not increase.

Dirt and breakage of cooling fin

Mixing of water inside the fuel filter

Carbon accumulated in the combustion chamber or exhaust hole.

Smoke set inappropriate

Overload

Inappropriate injecting timing

Nozzle clogging

Engine overheating with black smoke

See the comment for insufficient compression.

Insufficient compression

No fuel in the fuel tank

Mixing of water or foreign materials

(A) In case of compression problems

(B) In case of inappropriate fuel injection inside the combustion chamber

(C) Fuel and compression pressure appropriate, but the engine does not start.

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8. TROUBLE SHOOTING