The specific operation steps for timing of JAC Ruifeng 1.9t diesel engine are as follows:
1. Find the black link in the timing chain.
2. Align the black link of the chain with the origin of the camshaft.
3. Use a wrench to tighten the camshaft.
4. Tighten the camshaft to make the timing chain straight.
5. Turn the crankshaft gear.
6. Align the gap on the crankshaft sprocket with the link **. (Operation completed)