Engine JAC HFC4DA1-2C. Manual — part 6

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

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f.

Remove the fuel rail and rail pressure sensor assembly
and the rail bracket and install the fuel pressure rail
protective sleeve;

g.

Disassemble

h.

Disassemble the fixing bolts of oil dipstick fixing
sleeve and disassemble the oil dipstick conduit.

i.

Disassemble the fixing bolts and nuts of intake
manifold. Remove the intake manifold;

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

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j.

Remove the fixing bolts of compressor bracket and
remove the compressor bracket;

k.

Remove the bypass rubber pipe, remove the thermostat
housing and water outlet assembly; Disassemble the
fixing bolts of thermostat housing and remove the
thermostat housing.

l.

Remove the fixing bolts of cylinder head shield and
remove the cylinder head shield;

m. Remove the bolts and nuts of rocker arm support as per

specified sequence and remove the rocker arm
assembly. Sequence: 4-1-3-2

n.

Notice: The failure to loosen the bolts of rocker arm
support as per the specified sequence will damage the
rockshaft*.

o.

Take out the push rod;

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

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p.

Remove the cylinder head bolts by several times as per
the specified sequence (front circle drawing method).

q.

The failure to disassemble by several times as per

specified sequence will damage the cylinder head and
impair the deflection of lower surface of cylinder
head*.

r.

Remove the damping pulley.

Remove the fixing bolts of water pump, remove the
water pump, and check the water pump blades for
presence of cracking and corrosion and check the
blade shaft for presence of wear.

s.

Disassemble the fixing bolts of timing gear chamber
cover and remove the timing gear chamber cover and
cover gasket.

t.

Remove the engine left bracket.

u.

Loosen the bypass rubber hose clamp, loosen the
fixing bolts of water inlet pipe weldment, and remove
the water inlet pipe weldment.

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

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v.

Disassemble the fixing bolts of engine oil filter and
remove the engine oil filter.

w. Use an open-end wrench to disassemble the engine oil

pressure connector and remove the connector and
lubricating oil pipe.

x.

Loosen the fixing nuts of fuel injection pump gear,
remove the hexagon socket fixing bolts of fuel
injection pump and the fixing nuts of fuel injection
pump gear, knock lightly the fuel injection pump gear
shaft with rubber hammer, remove the fuel injection
pump and fuel injection pump gear, and install the fuel
injection pump protective sleeve. The fuel injection
pump shall be insulated from the air and dust.