Weichai America Corp.
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3.
Check the backlash of timing gear;
4.
On the engine assembly and disassembly work bench, rotate the crankshaft to locate the
camshaft timing gear at the TDC of the 1# cylinder. Unscrew the hexagon head bolts of
camshaft timing gear, and remove the timing gear and the locating pin;
5.
Unscrew the hexagon head bolts of camshaft thrust plate, and remove the thrust plate;
6.
Remove the camshaft.
4.2.4 Assembly steps of camshaft and camshaft timing gear
After removal, check the camshaft and timing gear; if any wear or larger deviation of other
parameters is found, repair the camshaft or replace with a new one.
1.
Wipe the camshaft hole with a piece of towel, check the camshaft hole for scratches and apply
appropriate lubricating oil to the inner perimeter of camshaft bush with an oilcan. If any
impact damage is found on the camshaft hole, it is not allowed to repair it for reuse.
2.
Insert the camshaft guide and camshaft sliding sleeve into the camshaft hole, wipe the
camshaft and check for impact damage; after this, insert the camshaft through the camshaft
hole, and when the camshaft is installed in place, remove the camshaft guide and camshaft
sliding sleeve. Be careful not to scratch the camshaft bush when inserting the camshaft.
3.
Install the camshaft thrust plate, and mount and tighten the hexagon bolts applied with sealant.
Make sure the rocker arm rotates flexibly.
4.
Polish the back of the cylinder body, clean the joint face, ensure it's clean and tidy. Assemble
the back end plate.
5.
Apply sealant on the back end plate, it's continuous and stability.
6.
Assemble the camshaft thrust plate and camshaft bolt.
4.2.5 Inspection and repair of camshaft and camshaft timing gear
Key point 1:
Inspection
1) Check if there is wearing on the camshaft surface in touch with tappet, and check if there is
scuffing or wearing on main journal;
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