pan through the oil outlet.
Function of the lubrication system.
• C o o l h e a t g e n e r a t e d f r o m t h e turbocharger working.
• Supply lubricating oil to the bearing system.
• Provide film support for the rotor
moving balance.
Oil outlet
3、、、、Spare part 3.Intercooler
Function: Cool the heated air from the turbocharger, increase the air density, improve engine gas charging efficiency.
Generally speaking, the temperature of the air will be increased more than 1 0 0℃ a f t e r p a s s i n g t h r o u gh t h e turbocharger, the air will expand after
RELIABILITY IN ACTION turbocharger, the air will expand after
being heated, which is not good for the air inlet, but the temperature could be reduced by passing through the charge air cooler.
• Classification: air-air charge air cooler, water-air charge air cooler.
Notice: LG956L engine doesn't have a charge air cooler.
3、、、、Spare part 4.Silencer
Change the flow direction of the exhaust air to consume the energy of the exhaust air by ways of , and balance air flow pressure fluctuation to get the needed attenuation character, so as to reduce the noise.
1. Engine does not start
Serial
number Cause of malfunction Repairing method
1 Starter motor speed is too low Check the starting system, cranking speed shall not be less than 110 r/min.
2 Air in fuel supply system
1. Check fuel pipe connector for loose. Release bleed screw on the fuel filter, and use hand pump to pump fuel, until the overflow of fuel without air bubbles.
2.Release high pressure fuel pipe connection on injector, and use hand pump to pump fuel, until the overflow of fuel without air bubbles.
3 Fuel line blocked Check fuel supply lines for unobstructed.
4 Fuel filter blocked Replace the spin-on filter element of fuel filter assembly.
5 The delivery pump can not feed fuel or feed intermittently
Check the fuel inlet lines for leaks and fuel delivery pump for malfunction.
6 Fuel injection less, no injection or injection pressure low
1. Check the injector spray condition;
2. whether the injection pump plunger and the outlet valve is worn or stuck, whether the plunger spring and outlet valve spring is broken.
7 Starting system circuit wiring
error or poor contact Check the wiring is correct and reliable.
8 The battery power insufficient Charge the battery.
9 Starter motor carbon brushes and commutator contact poor
Repair or replace the electric brush; clean the commutator surface by abrasive paper and blow it clean.
10
Low compression pressure low due to piston ring excessive wear or valve leaks
Check valve clearance, valve spring, valve guides and sealing of valve seat, it is necessary to grinding valve seats if the sealing is poor.
11
Fuel shut-off solenoid
connector may be loose or dirty, corroded
Tighten, clean or replace.
12 Fuel injection timing is not
assembled correctly Check and adjust.
2. Engine lacks of power
Serial
number Cause of malfunction Repairing method
1 Air intake blocked Check the air filter and air intake, clean or replace the air filter element.
2 Exhaust back pressure is too high
Check valve timing, adjust if necessary; clean exhaust pipes.
3 Fuel lines leaking or blocked
Check sealing conditions of fuel lines and fittings,check fuel filter for blocked, replace spin-on filter element, check injectispin-on pump sealing.
4 Fuel injection pump plunger
excessive wear Check and replace the plunger and barrel assembly.
5 Fuel injector poor atomization Check fuel injection pressure,clean up the carbon 5 Fuel injector poor atomization Check fuel injection pressure,clean up the carbon
deposit, adjust and repair.
6 Fuel injection advance angle is
smaller or larger than normal Check and adjust.
7 The air phase is error Check and adjust valve timing and valve clearance.
8 Cylinder head gasket air leaks
Tighten the cylinder head bolts in sequence in accordance with specified torque or replace cylinder head gasket.
9 Valve sealing poor Grind or replace to regrind.
10 Piston rings is worn
excessively Replace piston rings.
3. Exhaust black smoke
Serial
number Cause of malfunction Repairing method
1 Air intake blocked Check the air filter and air intake pipes and clean-up.
2 Poor fuel quality Use fuel up to specification 3 Fuel injector poor atomization Check, repair, or replace.
4444 Valve clearance is excessive Adjust valve clearance in accordance with the standard
4. Exhaust white smoke, blue smoke
Serial
number Cause of malfunction Repairing method
1 Poor fuel quality, with excessive
water in fuel Replace fuel up to specification.
2 Compression pressure is low, incomplete combustion
Check piston ring and cylinder head gasket and replace it.
2 incomplete combustion replace it.
3 Air supply or fuel feed timing is
not correct The specialized staff to check and adjust.
4 Compression pressure is low, incomplete combustion
Check piston ring and cylinder head gasket and replace it.
5. Oil pressure is too low
Serial
number Cause of malfunction Repairing method
1 Oil thin, or use improper oil Select appropriate oil according to specification
2 The oil pump rotor is worn or assembly
clearance is too large Replace the pump 3 Oil filter pressure regulator valve failure Repair
4 The pump inlet pipe cracks Repair, replace 4 The pump inlet pipe cracks Repair, replace
5 The pump inlet pipe mounting bolts loose tighten to specified torque 6 Shaft bearing clearance is too large Check and replace
6. Oil pressure is too high
Serial
number Cause of malfunction Repairing method
1 Temperature is too low, the oil viscosity is large
Choose specified type of oil, it is required to run at slow speed after start, check wheel the oil
temperature is normal viscosity is large
temperature is normal 2 Pressure relief valve blocked Check, clean
7. Excessive oil consumption
Serial
number Cause of malfunction Repairing method
1 External oil line leaks Check and repair 2 Diesel engine is overload Reduce the load 3 The type of oil is improperly Use as required
4 The piston is stuck or excessively worn Check, repair, and replace if necessary 5 Cylinder bore is worn excessively Cylinder boring for increased piston or 5 Cylinder bore is worn excessively Cylinder boring for increased piston or installing the repair-using cylinder liner 6 Valve guide is worn, valve stem
sealing failure Check and replace
8. High coolant temperature
Serial
number Cause of malfunction Repairing method
1 Insufficient cooling water, the water flow is too small
Check whether the cooling water is sufficient and add if necessary
2 Whether the belt is too loose Adjust 3 Water pump leakage Repair in time 4 Thermostat is failure or
damaged Check and replace
damaged 5
Water temperature sensor is damaged, the water temperature sensor failure
Check whether the actual temperature is identical to the gauge indicating value; if not, replace the temperature sensor or the temperature gauge 6 The cylinder head gasket is
blow-out Check and replace