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Cummins diesel engine connecting rod bushes


Detailed Description:

Cummins diesel engine connecting rod bush size bushing physical map and parameter model is for reference only: please contact our sales online customer service for specific price models,

Rixing Power Technology direct sales Cummins KTA19-G2, KTA19-G3, KTA19-G4, KTAA19-G6A, KTA19-G8, NTA855-G1, NTA855-G2, NTA855-G3, NTA855-G2A, NTA855-G4, NT855- GA, KTA38-G2, KTA38-G3, KTA38-G5, KTA50-G1, KTA50-G2, KTA50-G3, KTA50-G9A, KTA50-GS8, MTA11-G3, MTAA11-G3, 6CTA8.3-G2, 6CTAA8. 3G2, 6LTAA8.9G2, 6BTAA5.9G2, 6BTA5.9G2, 6BT5.9G2, 4BTA3.9G2, 4BT3.9G2, 4B3.9G2, VTA28G5, VTA28G6, QSZ13-G2, QSZ13-G3, QSK38-G5, QSL19G5, QSX15G6 QSX15G8, QSK23G3, QST30G3, QST30G4, QSK60G3, QSK60G4, QSK19G3; QSK78 Dongfeng Cummins connecting rod size bushing, Chongqing Cummins connecting rod size bushing, American Cummins connecting rod size bushing,

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Maintenance and Cause Analysis of Cummins Diesel Engine Rod Rod Burnout:

1. Due to the low oil pressure and the blocked oil passage of the crankshaft, the bearing bush lacks lubricating oil.

2. When disassembling or disassembling, the upper and lower bushes of the spindle bush are installed in reverse.

3. The engine oil is too dirty, the lubricant is deteriorated, the oil is mixed with water or the diesel is mixed with the oil

4. Large bearing clearance After the bearing clearance increases, the impact force on the bearing pad increases, causing the bush to burn.

5. Incorrect oil brand. If you use an unqualified oil, the viscosity of the oil will drop too much due to the small bearing clearance and excessively high lubricating oil temperature, which will cause the bush to burn under heavy load conditions.

6, the crankshaft is leaking, the oil passage is blocked, and the leaking will cause the oil to leak and fail to build pressure, which will cause the connecting rod bush to lack oil and burn out.

Common faults and repairs of Cummins diesel engine connecting rod sets:

1. Fracture of connecting rod bolts: Due to the effect of fluctuating loads, connecting rod bolts often fail and fail, causing fractures. Breakage of the connecting rod bolt can cause serious accidents such as "cylinder damage" and broken crankshaft.

2. Deformation of connecting rod: When the diesel engine is overloaded, the connecting rod will be deformed. Deformation of the connecting rod will cause the piston and the cylinder liner to be eccentrically worn, causing the failure of the "pulling cylinder".

3. Burning of connecting rod bush: When the connecting rod bush is poorly lubricated or the diesel engine is under heavy load for a long time, the crankshaft connecting rod journal will wear off the alloy layer of the connecting rod bush, and thin the connecting rod bush. Rod bush burned.

Problems that should be paid attention to when assembling the Cummins diesel engine connecting rod set:

1. When installing the bushing, pay attention to the position of the oil hole to avoid blocking the oil collecting hole.

2. The single-tooth positioning is used between the connecting rod body and the connecting rod cover, and they are numbered on the same side, and must be assembled in pairs. When the diesel engine is reassembled, the connecting rod set should correspond to the original cylinder number. (At this time, the connecting rod bush and the main journal have run in, and can no longer be interchanged.)

3. The connecting rod bolt is self-locked by friction. When installing the connecting rod bolts, use a torque wrench to tighten the two bolts alternately and uniformly to the specified torque (12010N · m) 2 to 3 times.

4. The gap between the connecting rod bearing bush and the connecting rod journal is not adjustable. When the amount of wear exceeds the allowable limit, the bearing bush must be replaced.

The composition of Cummins diesel engine connecting rod group:

The connecting rod group includes connecting rod, connecting rod cover, connecting rod bolt, connecting rod bearing bush, connecting rod small head bushing and the like. As shown below:

1: The function of the connecting rod group is to connect the piston and the crankshaft, and turn the reciprocating motion of the piston into a rotary motion of the crankshaft. It is an important component for transmitting power in the crank link mechanism.

2: The small head of the connecting rod is connected to the piston pin. An oil collecting hole is opened above the small head of the connecting rod, and an oil distribution groove is formed on the inner surface of the bushing. The splashed lubricant lubricates the bushing through this hole. There is a mark on one side of the connecting rod body. When connecting to the piston, the arrow on the top of the piston should point to the marked side of the connecting rod body. Point the piston arrow towards the front of the engine. Do not misplace in this direction.

3: Insufficient strength of the connecting rod, the fracture of the connecting rod and the connecting rod bolt will cause damage to the whole machine; insufficient rigidity and deformation of the connecting rod will cause the piston, cylinder, connecting rod bearing, connecting rod journal and other parts to be abraded, and will also be caused by Broken connecting rod smashed the cylinder liner.

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