Engine JAC HFC4DA1-2C. Manual — part 10

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

39

b. Install the tappet anti-drop tool.

3. Install the piston connecting rod
assembly.

a. Spray one film of oil onto the cylinder bore.

b. Spray oil onto the piston skirt, install the piston into

the piston taper sleeve, insert into the cylinder bore,

and use nylon bar and guide jig to install the piston.

Notice: (The connecting rod and bolts shall not

come into contact with the cylinder bore and the

large end bore of connecting rod shall be

orthometric with the crankshaft journal.)

c. After installing the large end cap of the connecting

rod, tighten the large end nut of connecting rod to

20N· m and 85N· m by two times.

d. Use a feeler gauge to check the side play of large end

of connecting rod. The side play range for large end

of connecting rod: 0.175-0.29mm.

e. After the installation of pistons for 1

st

and 4

th

cylinders, rotate the crankshaft for 180º and install

the pistons for 2

nd

and 3

rd

cylinders.

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

40

4. Install the timing gear and related
accessories.

a. Insert the lubricated tappets in turn into the tappet

holes.

b. Install the water manifold (The water manifold is

paralleling with the cylinder block)

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

41

c. Spray oil to the crankshaft gear and then install.

d. Install the gasket of timing gear chamber.

e. Install the timing gear chamber and idler gear lining

plate and pre-tighten the fixing bolts.

Maintenance manual for sunray hfc4da1-2c china-IV diesel engines

42

f. Spray lubricating oil onto the camshaft bush, add

lubricating oil to the head of tappet, and spray
lubricating oil onto the camshaft subassembly.

g. Install the camshaft (with the bottom facing upward

and the left facing forward).

h. Tighten the fixing bolt subassembly of camshaft

thrust plate to 25±5N.m.

i. Install the engine oil pump outlet pipe subassembly

and engine oil pump assembly with strainer.