Reasons for cylinder pulling:
The reasons for cylinder pulling are very complex, with design
factors such as material selection, determination of gap size,
appropriateness of device installation, reasonable structural
layout, surface roughness, and perfect lubrication and cooling
arrangements. From a management perspective, it may be caused by
the following reasons:
(1) Poor cylinder lubrication:
The cylinder is not lubricated enough or the oil supply is
interrupted, and the cylinder is pulled due to direct metal
contact. The reasons for poor cylinder lubrication include: too
little oil in the oil pan or poor oil quality, too high temperature
of the diesel engine, or damage or failure of the piston ring
(mainly the oil ring).
(2) Insufficient running-in:
To achieve effective break-in in the shortest possible time, it is
necessary to consider the issues of break-in time and load
distribution. Even if the break-in is carried out for a long time
under low loads, it cannot be completed. However, if the engine is
in a hurry to operate at high loads, it may cause cylinder pulling.
Therefore, during the diesel engine break-in period, it should be
noted that the amount of oil injected should be appropriately
increased; After the piston ring is renewed, it should run under
low load for a period of time; After replacing the piston and
cylinder liner, they should be run in before increasing the load
for operation.
(3) Poor cooling:
Poor cooling will result in excessively high temperature of the
cylinder and piston, and poor lubrication; Poor cooling can cause
excessive expansion and deformation of the piston and cylinder
liner due to overheating, loss of the original normal clearance,
and cylinder pulling. The reasons for poor cooling include
insufficient discharge pressure of the cooling water pump,
insufficient or interrupted water supply; Rust or dirt in the
cooling water chamber; Water contains bubbles that accumulate in
the cooling chamber but are not released, resulting in air
resistance; The water quality is too dirty and the water
temperature is too high.
| Applicable models | 6D125 |
| Type | Cylinder liner |
| Original number | 6151-22-2220 |
| Warranty | 6 months |
| Engine Type | Diesel |
| Brand Name | HDPARTS |
| Condition | New |
| Size | OEM Size |
Troubleshooting of Cylinder Cushion Faults
Cylinder flushing engine gasket is a common malfunction. The
cylinder cushion can have many common forms of abnormal noise. Due
to the varying degrees of washing away of the cylinder gasket, the
resulting abnormal sound is different. Three different sets of
pulse type bulldozer engine cylinder gasket faults based on the
Hong-120
