STARTER WILL NOT CRANK ENGINE AT ALL

Engine not cranking can be some how difficult to find any fault but trust me will get rid off it by following the steps below.

NOTE: At this point the cause of starter will not crank engine at all is Unknown: Whether is due to fault in the Starter system or Mechanical obstruction in the engine.

Let first of all see through the starter system

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STARTER SYSTEM MALFUNCTION

1. STARTER CONTROL BATTERIES INOPERATIVE

Test for proper battery charge(battery tester or multi-meter) and inspect cable connections of control circuit batteries.

2. STARTER CONTROL ARE INCORRECTLY SET

If the equipment has an insulation switch make sure is in the start position.

Check all switches and circuit breakers in the engine control and protective device are properly positioned.

On electric starting engine make sure that the battery key switch is closed and starting fuse still has continuity.

On Air Start, ensure the starting reservoirs are fully charged to the proper pressured and are free of water accumulation.

Check that all valves in the air line to thr are open.

If the starter still do not respond, check the followings (depending on the type of system {engine}) while the starter is in start position;

Establish whether or not there is voltage across the starter motors.(separate electric start motors).

Establish whether or not there is voltage potential across the generator start winding terminals(on generator starting units).

Establish if there is air pressure available at the starters( on air start).

On main generator starting system examine the generator itself for damage to the bus bar connecting the starter windings or possible loose connections to this circuit.

3. STARTER MOTORS INOPERATIVE

If the voltage or air pressure is being supplied to the starter motors, remove the starter motor and bench test in accordance with instruction in the engine maintenance manual.

On main generator starting system, examine the generator itself for damage to the bus bar connecting the starter windings, or possible loose connections to this circuit.

4. STARTER CONTROL CIRCUIT IS INOPERATIVE

ON ENGINES USING AIR START

Check the air start control valve for failure to pick up and check for restriction in the starter air supply lines.

5. STARTER MOTOR PINIONS DO NOT ENGAGE PROPERLY

Check the gear teeth on pinion and flywheel for damaged or debris.

On air start system check air lines to engagement mechanism, the solenoid valve and the control valve for proper operation.

Check that the starter motors are mounted and aligned properly.

Bench test motors for proper engagement operation.

click here how to bench test starter motor

MECHANICAL OBSTRUCTION

o DAMAGE ENGINE ASSEMBLIES/DERIS

Note: Whether starter motor responded when starter switch is operated. If starter do not respond it is a starter malfunctions.

Open all the cylinder test valves and attempt to rotate crankshaft by manual barring tool in the flywheel.

If the engine can be barred over one or two complete revolution it is a starter system problem "Starter malfunction".

If the engine can not be barred over one complete cycle, see possible cause "cranking prevented by mechanical obstruction.

Remove all air box hand-hole covers and perform a complete visual inspection.

Look at all assemblies for broken or damaged components.

Check for debris in air-box and linear port area.

Remove all oil pan hand-hole covers and inspect for

o Damaged/bent connecting rods

o Damaged counter weights.

o Evidence of over heated main bearings

o Damaged to the lower linear skirt of air cylinder linear.

Check that all piston cooling pipes are in place and intact. If a damaged piston cooling oil pipe is found, the related power assembly should be inspected closely for damaged.

If the engine was recently overhauled then inspect all fork rod power assemblies for proper matching of serial numbers in the basket assemblies (A mismatched basket could result in a pinched connecting rod bearing shell).