WIECHAI WP10 engine piston ring 612600030051

Description

WIECHAI wp10 engine piston ring 612600030051:

Piston Ring 612600030051 The Function of Piston Rings:

Piston rings are ring-shaped components installed in the piston ring grooves. They play three core roles in an engine:

1. Sealed cylinder: Prevents the gas inside the cylinder from leaking through the gap between the piston and the cylinder wall, ensuring combustion pressure and enhancing engine power.
2. Heat conduction and cooling: Transfers the heat from the piston head to the cylinder wall, which is then dissipated through coolant or air to prevent the piston from overheating.
3. Control of engine oil: The upper oil ring removes excess oil from the cylinder wall, while the lower oil ring prevents the oil from flowing into the combustion chamber, reducing oil burning and carbon formation.

Piston Ring 612600030051 Structure and Material Characteristics

1. Common Structural Types
Gas Rings (Compression Rings): Usually have 2-3 layers, located on the upper part of the piston, with cross-sections mostly in rectangular, trapezoidal or twisted shapes. They achieve sealing by elastic contact with the cylinder wall.
Oil Rings: Located below the gas rings, mostly in a combined form (steel sheet + spring) or a monolithic form. They scrape off the engine oil with oil scraping edges and return it to the oil pan through the ring groove.

2. Materials and Processes
Material: Gas rings commonly use alloy cast iron (such as containing chromium, molybdenum, vanadium, etc.), with the surface treated by chrome plating, nitriding, and phosphating to enhance wear resistance and corrosion resistance. Oil rings mostly use low-carbon steel or alloy steel plates. The spring of the combined oil rings is stainless steel or spring steel to ensure the elasticity of the oil scraping.
Process Characteristics: The 6126 series piston rings of Weichai may adopt a trapezoidal ring design (for gas rings) to prevent carbon deposits from blocking the ring groove; Oil rings may be equipped with spiral spring rings to enhance the oil scraping effect.

Piston Ring 612600030051 Compatibility Models and Specifications

Compatible Engines:
weichai 6126 series engines (such as WP10.336, WP12.375, etc.), the specific model needs to be confirmed based on the engine displacement, cylinder diameter (126mm), and the number of piston ring slots.

Specification Parameters:
Diameter: Matches the inner diameter of the cylinder (126mm), thickness, opening gap, etc. should refer to the engine maintenance manual (for example, the opening gap of the air ring is approximately 0.25-0.4mm, and the oil ring is approximately 0.2-0.3mm).
Note: There may be differences in piston rings for different years or improved models (such as upgraded coating process), it is recommended to query the exact model through the engine nameplate or service station.

Piston Ring 612600030051Damage Manifestations and Replacement Periods

1. Common Causes and Manifestations of Damage
Wear or Breakage: Long-term high-load operation, poor fuel/机油 quality leading to ring surface wear， manifested as decreased engine power， blue smoke (excessive oil burning)， insufficient cylinder pressure.
Elastic Failure： High-temperature aging or carbon deposits causing sticking， resulting in decreased sealing performance， presence of unburned fuel smell in exhaust， abnormal increase in oil consumption.

Seam Leakage： Incorrect opening of the ring during installation， causing gas leakage， difficulty in engine startup or idle vibration.
2. Replacement Periods
Under normal maintenance conditions， the replacement period for piston rings is consistent with the engine major overhaul period (approximately 30-50，000 kilometers or 5-8 years). If the above damage symptoms occur， replacement should be carried out in advance.

Key Points for Piston Ring 612600030051 Replacement and Installation

• Preparation for replacement: The cylinder head and piston connecting rod assembly need to be removed. Check the wear condition of the cylinder wall (if the taper or roundness exceeds the limit, the cylinder needs to be reamed). New piston rings must match the original factory specifications. Check the opening gap and side gap (the gap between the ring and the ring groove, the side gap of the oil ring is approximately 0.04-0.08mm).
  Installation steps and precautions:
• Cleaning: Use gasoline or a dedicated cleaning agent to remove carbon deposits in the piston ring groove to avoid the new ring from getting stuck.
  Ring sequence and direction: The air ring and the oil ring must not be confused. The side with the “TOP” mark on the air ring should face upwards. For twisted rings, pay attention to the direction of the cut (for example, the inner cut should be upward and the outer cut downward).
• Opening misalignment: The openings of each air ring should be misaligned by 120°-180° to avoid the openings facing the direction of the piston pin or the damaged area on the cylinder wall.
  Lubrication: Before installation, apply a small amount of engine oil on the piston ring and the cylinder wall to prevent dry friction during startup.