Manager

Contact information

1

Yan Shuhe

0086-15253665877

0086-536-7618356

kefu@fuyuan.net.cn

2

Liu Jingliang

0086-15265616766

0086-536-7618356

kefu@fuyuan.net.cn

1

Foreign   matter into turbocharger while working

Remove   the inlet pipe and check whether the wheel or shaft is damaged by foreign   matter.

If wheel   is damaged check the tightness of pipe or whether foreign matter existing in   pipe, which was brought into turbocharger.

Users

Replace   the turbocharger, remove the failure in inlet & outlet pipe and ensure   tightness of pipeline.

Note:   During the maintenance and repair of engine, the air inlet of the compressor   should be well protected. Before installing the air inlet pipe, check   thoroughly if any foreign matter in pipeline.

1

When the supercharger   works with loud noise and friction noise, or it is suspected that the   turbocharger bearing or rotor shaft is worn.

Remove the inlet pipe   of compressor and exhaust pipe of turbine outlet, check whether wheel is   damaged and whether rubbing happens between wheel and housing. If any scratch   happens, the turbocharger is damaged.

Move the   wheel with fingers to check whether it rotates flexibly; feel clearance of   turbocharger shaft by hands. (Reference normal range: radial   clearance<1mm; axial clearance ≤ 0.2mm)

[Mostly,   if wheels are not damaged by foreign matter, there is low possibility of   turbocharger failure if it is intact in appearance, and shaft wheel assembly   can rotate flexibly,  wheels do not rub   the housing, and its clearance is normal (it can be considered to normal if   the wheels pressed gently it can rotate without rubbing housing.)]   

Check the   following steps

2

Caused by   hard particles in oil circuit or use of inferior lubricating oil

Check   whether the lubricating oil and lubricating pipelines are clean or contain   hard particles; check whether the inferior lubricating oil is used.   (Note: check whether there is any sludge, impurities, blackening and glue in   the central housing, oil inlet and outlet, pipe or in oil).  

Users.

Clean the   lubricating pipeline, replace the filter, replace high-quality lubricating   oil, and replace the turbocharger.

3

Lack of   oil

Check   whether the oil pipeline is bent, blocked or leak.

Check   whether the oil is sufficient.

Insufficient   oil pressure or burning may cause oil pipeline relief pressure which cause   turbocharger cannot supply oil normally.

users

（1）   Replace   the turbocharger and eliminate problems of bending, blockage and leakage

（2）   Replace   the turbocharger and replenish oil.

（3）   Replace   the turbocharger and eliminate the failure of insufficient oil pressure or   burning.

4

Dynamic balance   failure due to dust deposition on wheel

。

Visually inspect the   surface of wheel, the inner wall of the inlet of the compressor housing and   the inner wall of the inlet pipe of the compressor, and check whether there   is dust deposition adhering. If any, it means that the inlet air is too   dirty, the dynamic balance of the wheel fails due to dust deposition, causing   bearing failure.

users

Clean the air inlet   pipeline, eliminate the problems of air filter failure, poor sealing or   pipeline sealing, and replace the turbocharger.

5

Improper   use

Ask user   if any of the following improper behavior happens

1、Adopt the operation mode of   "accelerating → coasting in neutral"

 2、Excessive   idle time(more than 20 min)

3、After starting the engine,  run at high speed by stepping on the   accelerator without running at low speed for 3~5 minutes first; Or after a   long time of running, shutdown without idling for 3~5 minutes.

Ask the   driver whether he operates properly:

After   starting the engine, pound the accelerator immediately without idle running   for 3~5 minutes. Shutdown immediately without idle running for 3~5 minutes.   Repeat hot showdown; the above referred may cause turbocharger lack of oil   and parts rubbing housing or oil leakage.

4、Check whether there is coking or   caking of oil in central housing

Users  

Clean the   air inlet pipeline, eliminate the problems of air filter failure, poor   sealing or pipeline sealing, and train customers to use turbocharger   properly.

1

Confirm whether   turbocharger is damaged.

Remove the   inlet pipe of the compressor, check whether wheel is damaged. Move wheel with   fingers to check whether it rotates flexibly; feel clearance of turbocharger   shaft by hands. (Reference normal range: radial clearance<1mm; axial   clearance ≤ 0.2mm)

[Mostly,   if wheels are not damaged by foreign matter, there is low possibility of   turbocharger failure, if it is intact in appearance, and shaft wheel assembly   can rotate flexibly,  wheels do not rub   the shell, and its clearance is normal (it can be considered to normal if the   wheels was press gently it can rotate without rubbing housing).]

The   turbocharger is damaged, if the wheel and shaft are damaged, housing is   rubbed or the clearance of the shaft is too large, and it cannot rotate   flexibly.  Replace the turbocharger and   carry out the subsequent inspections.

If the   turbocharger has no fault through manual inspection. Do not replace the   turbocharger, and carry out the subsequent inspection steps at this time.

2

The air inlet   negative pressure is high

When there is oil or   serious oil trace in the compressor, that is, the turbocharger is leaking   oil, carefully check the turbocharger.

1、Dust   enters air   filter or air filter fails (check the dust on the inner wall of intake   manifold and inlet of the cylinder cap)

Reference: After   removal of the oil trace, remove the inlet pipe of compressor, i.e.   turbocharger takes air from the atmosphere directly, run at intermediate   speed for 5-10 min, and at high speed for more than 20 min, check whether the   turbocharger still leaks oil or the situation is improved

2、After the above   treatment, if there is no oil leakage or the situation is significantly   improved, it means that the air inlet negative pressure is high, and the air   inlet system should be checked later. "

3、New machine with   short mileage: the rubber hose is coated with oil or grease during assembly,   resulting in false oil leakage trace

1、users

2、Users or   enginebuilders

Eliminate   the factors causing big negative pressure of intake air:

1、  

The air filter is   blocked or fails

2、 The intake hose is too soft and flat

3、The intake pipe is severely bent or   the right angle transition causing the intake blockage and too big resistance

3

Air   inlet or exhaust pipe is loose or broken.

Users

Eliminate   the pipe leaking trouble

5

Restricted   oil return.

Check   whether the oil return pipe of turbocharger is blocked? (For example, the   self-made gasket oil hole is not aligned, the oil pipe is blocked (by oil   sludge), or the oil pipe is too bent or too flat etc.)

Depends   on the actual situation

Remove   the failure of poor oil return

6

Too high   crank case pressure

Checking method

1、Check   whether the breather or its pipe are blocked and whether pipe is bent or   interfered.

2、If the   pipe of breather is unobstructed, remove the oil filler cap or the breather   (depending on the model) and run at high speed. Observe whether smoke color   has changed significantly. After 20 minutes, check whether the oil leakage   has improved. If it has improved, check the crankcase pressure.

Depends   on the actual situation

Check   whether the breather blocked or whether the piston ring, cylinder liner worn   causing gas blowby.

7

Caused by the hard   partials in pipelines or use of inferior lubricating oil

Check whether the   lubricating oil and pipeline is clean. Ensure whether inferior oil used   (Note: check whether there is any sludge, impurities, in the central housing   or in oil)

Users

Clean the   lubricating pipeline, use high-quality lubricating oil or replace   turbocharger

Lack of   oil

Oil inlet   pipe leak:

（1）Check   whether the oil inlet pipe blocked. The pressure relief of the oil circuit   due to insufficient oil pressure or burning causes failure in oil supply to   the turbocharger.

（2）Whether oil is sufficient.

（3）After starting the   engine, step on the accelerator to run at high speed immediately without idle   running for 3~5 minutes. Shutdown immediately after a long period of high-speed   running without idle running for 3~5 min. Hot showdown. Adopt the operation   mode of "accelerating and coasting in neutral" The above referred   may cause turbocharger lack of oil and the parts rubbing the housing or oil   leakage.

User

（1）Remove   the oil pipe fault and replace the damaged turbocharger.

（2）Ensure   of sufficient oil, replace the failed turbocharger.

（3）Instruct   the driver to operate properly, replace the damaged turbocharger.

Dynamic balance   failure due to dust deposition on wheel.

Visually inspect the   surface of wheel, the inner wall of the inlet of the compressor housing and   the inner wall of the inlet pipe of the compressor, and check whether there   is dust and mud adhering. If any, it means that the inlet air is too dirty,   the dynamic balance of the wheel fails after dust deposition, and then causes   the bearing failure.

User

Clean the   air inlet pipeline, eliminate the problems of air filter failure, poor   sealing or pipeline sealing, and replace the turbocharger.

Incorrect application

The following   improper operation exist

1、Adopt the operation mode of   "accelerating — coasting in neutral"

2、Excessive idle time (more than 20 min)

3、After starting the engine, step on the   accelerator to run at high speed immediately without running at low speed for   3~5 minutes. Or shut-down after a long period of high-speed running without   idle running for 3~5 min.

4、Check whether coking or caking happens   in the oil of central  housing.

User

Clear the lubricating   oil pipeline and replace the turbocharger. Train the customer to use   turbocharger properly.

8

Bad turbocharger

After the above   inspection, if the turbocharger still leak after the it is likely to be a   quality problem of itself

Supplier

Replace   the turbocharger