Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group

The Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group is a comprehensive assembly crucial for the tractor’s engine performance and reliability. This group includes a variety of essential components, each serving a specific function to ensure the engine operates smoothly and efficiently.

Product Parameters of Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group

Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group
Core Sealing and Fastening Components
At the heart of the cylinder block group are the sealing and fastening elements. The inner hexagon tapered screw plug and screw plug assembly provide crucial sealing for the cylinder block, preventing fluid leaks and maintaining internal pressure. The screw plug is designed to fit precisely into the block, ensuring a secure seal. Additional sealing is achieved through the use of a rectangular seal ring and O-ring, which are crucial for preventing leaks between different engine parts.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group
Dowel Pins and Bolts
Dowel pins are used extensively throughout the assembly to ensure accurate alignment of engine components. Multiple dowel pins, including those used for aligning the crankshaft gear and cylinder sleeve, ensure that all parts are correctly positioned to avoid misalignment issues. Bolts are also critical for securing various components, including the main bearing cover, tappet body, and cover plate, providing the necessary clamping force to maintain structural integrity.
Crankshaft and Associated Components
The crankshaft is a central element of the engine, and its functionality is supported by several key components within the cylinder block group. The lower and upper crankshaft shells, along with the thrust bearing shell of the crankshaft, are designed to support and stabilize the crankshaft during operation. The crankshaft gear is essential for power transmission, while the piston cooling nozzle ensures efficient cooling of the pistons.
Cylinder Block and Cover Plates
The cylinder block itself houses critical parts, including the cylinder sleeve and camshaft bushing. The cover plate, secured by bolts and equipped with a cover plate gasket, protects and seals the engine components. The crankcase ventilating washer and guide pipe are also integral parts of the cylinder block assembly, ensuring proper ventilation and fluid management.
Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group
Additional Components
Additional components such as the rotational speed should ring and drain valve contribute to the engine’s operational efficiency. The tappet body is vital for maintaining valve timing and performance, while the bowl plugs are used to seal various openings in the cylinder block. The main bearing cover, secured by bolts, supports the crankshaft bearings, ensuring smooth engine operation.
In summary, the Dongfeng DFL4251A8-T31R-931-02 Series Tractor Truck Cylinder Block Group is an intricate assembly consisting of a variety of components, including sealing plugs, dowel pins, bolts, and the crankshaft. Each part plays a vital role in maintaining the engine’s performance, reliability, and overall efficiency.

Serial No.	Part No.	Part Name	Qty.
1	10148900	Inner hexagon tapered screw plug	1
2	10256700	Screw plug assembly	1
3	10152100	Screw plug	6
4	10522600	Dowel pin	2
5	10523200	Dowel pin	4
6	10523300	Bowl plug	1
7	10524500	Rectangular seal ring	6
8	10524800	Bolt	6
9	10527800	O ring	1
10	10257300	Lower crankshaft shell	7
11	10257400	Upper crankshaft shell	6
12	10257500	Thrust bearing shell of crankshaft	1
13	10533400	Cylinder sleeve	6
14	10155700	Dowel pin	1
15	10526100	Crankshaft gear	1
16	10745300	Dowel pin	1
17	10772100	Bolt	4
18	10772700	Crankshaft	1
19	10774000	Rotational speed should ring	1
20	10534600	Tappet body	12
21	10772900	Bolt	1
22	10774200	Bolt	1
23	10258700	Piston cooling nozzle	6
24	10153400	Bolt	2
25	10159000	Cover plate gasket	1
26	10160600	Cover plate	1
27	10536400	Crankcase ventilating washer	1
28	10538300	Bolt	6
29	10541300	Cover plate	1
30	10542200	Guide pipe	12
31	10775700	Cylinder block (including No.34 to 40 parts)	1
32	10519900	Bowl plug	3
33	10520100	Bowl plug	4
34	10154200	Bowl plug	3
35	10155800	Bowl plug	3
36	10533300	Camshaft bushing	7
37	10258600	Main bearing cover Bolt	14
38	10536500	Main bearing cover	7
39	10928100	Drain valve	1