Cleverly changing the bearing of a single cylinder diesel engine

Once the single-cylinder diesel engine has worn the crankshaft, it can be repaired by replacing the affected parts. If necessary, the shaft can be machined or replaced. This method is straightforward and efficient, as it doesn’t require removing the cylinder head or piston assembly, nor does it involve adjusting the valve clearance, saving both time and labor.

(1) If the crankshaft is stuck and won't turn, start by removing the belt from the flywheel. Then, use a flathead screwdriver to push down the flywheel nut locking tab. Place a special flywheel removal wrench on the flywheel nut and gently tap the wrench handle clockwise with a hammer. This should loosen the flywheel enough to turn it manually.

(2) Next, remove the gear chamber cover, timing gear, and rear cover. Loosen and remove the flywheel nut, then carefully pull the flywheel away from the crankshaft.

(3) Use an appropriate socket wrench with an elbow joint to loosen the connecting rod bolts. Once the decompression is done, rotate the crankshaft until the piston reaches top dead center. Remove the main bearing cap bolts, take out the cap, and extract it from the rear cover. With the connecting rod bolts in hand, remove the connecting rod cap and pull the crankshaft out from the engine block. Then, thread a wire through the bolt hole on the big end of the connecting rod to help guide the piston assembly later.

(4) Inspect the crankshaft journals for wear and determine how much material needs to be removed. Match the amount of machining to the thickness of the corresponding bearing shells to ensure proper fit and function.

(5) Reinstall the crankshaft following standard procedures for the main bearings. Turn the crankshaft so that the crankpin moves backward, and then pull the wire attached to the big end of the connecting rod, guiding the piston and connecting rod assembly down to bottom dead center. Insert the upper bearing shell into the big end of the connecting rod and the crankshaft journal, then press the lower bearing shell into the connecting rod cap. Hand-tighten the connecting rod bolts, and finally install the main bearing cap.

(6) Once all the connecting rod bolts are tightened to the manufacturer's specified torque, reassemble all the previously removed components and check for any misalignment or damage. This process ensures that the engine runs smoothly after the repair is complete.

Pharmaceutical Grade

Pharmaceutical grade is the classification of use, not purity. Pharmaceutical grade is a kind of reagent used in medicine respectively. The purity of pharmaceutical grade may not be higher than that of chemical grade, but the key point is that the reagent can be used in medicine first, without harm to human health; Secondly, it should not contain impurities harmful to human body. Even some impurities that are difficult to remove must be lower than the national standard for the residue of the substance in medicine or food. Some pharmaceutical grade reagents may not have very high purity, many of them only reach industrial purity, but the harmful impurities must be very low or none.

Product Description

Product Name: Gabapentin Powder
Other Name: GABAPENTINE
CAS No: 60142-96-3
EINECS No: GU6496000
Appearance: White Powder
Purity: 99%
Molecular Formula: (GeCH2CH2COOH)2O3
Solubility in water: 20g/L(60℃)

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Function

1. Gabapentin Powder is a novel antiepileptic drug. Gabapentin can prevent epilepsy.

2.Gapapentin Powder is an additional treatment for epilepsy patients with localized seizures which can not be satisfactorily controlled or tolerated by conventional antiepileptic drugs and epilepsy patients with localized seizures and then generalized.

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