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Details that China Chain Supplier Should Pay Attention to when Installing and Disassembling

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In engine maintenance work, it is often necessary to install and disassemble double speed chains and sprockets, which is an important part of the engine repair process. Whether the installation is correct or not directly affects the quality of the entire engine repair. If you are slightly negligent in your work, it will cause the engine to start difficult or even start. When installing and disassembling timing chains and sprockets for China chain supplier(GETECHAIN), the following points should be mastered:

(1) Remove the battery negative ground wire.

(2) Remove the front cover of the engine and the parts that hinder the work.

(3) Turn the crank to make the first cylinder-piston at the compression top dead center position, align the timing marks on the camshaft and the crank sprocket, and have two timing marks on the camshaft sprocket, one is the first cylinder When the piston is at the top dead center timing mark, the first cylinder intake valve and the exhaust valve are in the closed position; the second is the fourth cylinder piston at the top dead center timing mark, then the fourth cylinder intake valve Both the exhaust valve and the exhaust valve are in the closed position. Be sure to find out that the pistons of the first few cylinders are at the compression top dead center.

(4) Remove the bolts on the camshaft sprocket and remove the timing chain and camshaft sprocket

(5) If the crankshaft sprocket needs to be replaced, apply the puller to remove the sprocket. When installing a new sprocket, align the chain with the chain slot to prevent loosening.

(6) Install the chain on the camshaft sprocket, fix the sprocket, suspend the chain, and align the timing marks on the camshaft and the crankshaft sprocket. Align the locating pinhole on the sprocket with the locating pinhole on the camshaft, and then attach the sprocket to the camshaft. The tightening torque of the camshaft sprocket bolt is 20N·M.

(7) Lubricate the timing sprocket and chain with oil.

(8) Turn the crankshaft two turns to check if the engine timing marks are aligned. If the timing marks are not aligned, follow the steps above to re-do it.

If there is no timing mark on the camshaft gear, the following points should be noted during installation:

(1) Install the crankshaft sprocket.

(2) Install a timing chain damping plate on the cylinder block.

(3) Align the timing mark on the crank sprocket with the timing mark at the bottom of the timing damper plate.

(4) Suspend the timing chain, fix the camshaft sprocket, and install the timing chain on the crank gear.

(5) Align the centerline of the positioning hole on the camshaft sprocket with the timing mark at the top of the timing chain damping plate.

(6) Align the positioning pin on the camshaft with the positioning hole on the camshaft sprocket. Attach the sprocket to the camshaft with a bolt tightening torque of 100 N·M.

(7) Lubricate the timing chain and sprocket with oil.

(8) Turn the crankshaft two turns to check if the engine timing marks are aligned. If the timing marks are not aligned, repeat the operation as described above.

The above are the details I should pay attention to when installing and disassembling the timing chain and sprocket.

Click China chain factory to learn about more information.

 

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