Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
35
Section II Assembly of Engine
I. Basic Technical Requirements for Assembly
The assembly of the engine is one important step for service of the engine. The service performance of the engine is
closely related to the assembly accuracy, assembly technical requirements, and the assembly quality. Make sure to pay
attention to following items:
Before the assembly, make sure to thoroughly clean and thoroughly blow dry all parts and components. All friction
surfaces of the parts with relative movement are applied with lubricating oil (grade CE diesel engine oil or above).
Carefully remove all oil dirt and carbon deposit, till the base metal is exposed. Never use electric wire brush to clean
the sealing surfaces of any sealing gasket. Remove the residues from all used sealing gaskets. It’s absolutely
prohibited to use wire brush to clean the piston.
a. Remove the carbon deposit, oil dirt, and water scale and clean all lubricating oil pipes and pipelines.
b. Check the wear state of valve, push rod, and rocker arm contact surfaces and when necessary repair or replace.
c. Check the wear state of piston rings, cylinder sleeves, connecting rod small end bushes, and connecting rod bushes
and when necessary replace.
d. Check the wear state of main bushes and thrust plates.
e. Check the wear state of engagement surfaces of transmission mechanism and drive gear and measure the
engagement clearance and when necessary repair or replace.
f．Check the wear state of intake and exhaust valves and intake and exhaust valve seats and repair, grind, and test the
leakage and when necessary replace.
g．Check the mist injection state of the fuel injector and when necessary grind or replace the fuel injector coupler.
While installing the used fuel injector, clean the carbon deposit with ultrasonic and do not wipe with silk or scrape
with knife, in order to prevent damaging the injector nozzle and blocking the injector orifice.
h. Check the engine oil pump and disassemble for checking or measure the wearing parts and adjust accordingly.
i. Check the cylinder gasket and intake and exhaust pipe gaskets and replace any damaged or failed gasket.
j. Check the alternator and starter, clean all parts and bearings, blow dry and apply new lubricating grease, and check
the wear state of starter gear and check the transmission mechanism for flexible functioning.
k. Check and clean the turbocharger.
To Next Page
Loading...