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4 DLT ENGINE
ENGINE TESTING
After assembly of the engine, mount engine on test
bed. Prepare engine for starting and testing in the
following manner :
Connect gear box to the dynamometer flange with
suitable coupling or propeller shaft
Connect oil pressure gauge and temperature gauge.
Connect water hoses to and from radiator. Fill coolant
(water and anticorrosive agent) in the cooling system.
Fit radiator cap.
Fill required quantity of recommended oil in the oil
sump.
Mount air cleaner assembly on test bed suitably.
Connect hoses from air cleaner outlet to
turbocharger, turbocharger to intercooler and
intercooler to engine intake.
Make suitable linkage of controlling accelerator
lever.
Connect exhaust pipe to exhaust manifold.
Connect battery cables to starter motor. Ensure that
-ve terminal is earthed. Make suitable connection
from +ve terminal of battery to the FIP solenoid
switch.
Crank engine with accelerator lever in idling position.
Allow oil to be circulated through the system. Check
and ensure that oil pressure indicated by gauge is
satisfactory.
Slightly raise the engine speed and check for any
oil, fuel, water and air leakages. Rectify if any. Check
colour of the exhaust gas. Check for any unusual
noise from the engine.
Connect engine to dynamometer and run for
running-in test as per schedule.
Engine running in test schedule
Engine Speed
Time
Torque
(rpm)
(minutes)
(mkg)
900
5
-
1500
5
3.5
2000
5
5.9
2500
5
7.1
3000
5
8.8
3500
5
9.0
4000
5
9.5
4300
5
10.0
4300
5
13.0
After running-in test of the engine, reduce
dynamometer load to zero and allow engine to run
at idling speed for about 5 minutes and then stop it.
To prevent the entry of dirt/debris into the
Turbocharger, the following procedure is to be
followed during testing.
1.
Remove inlet adaptor from turbocharger and
preserve it in a clean place for refitment after
the test.
2.
Fit assy. connector using new & clean filter
sieve.
3.
Fit assy. oil line inlet ensure that this line is
internally clean.
4.
Complete engine testing.
5.
Remove assy. oil line & assy. connector.
6.
Remove used filter sieve & the strainer. Do not
use the oldfilter Sleeve & Strainer again. Fit a
new sieve & strainer and the sealing washer
and keep the assy. connector ready for next
eng.
7.
Fit the original Adaptor on the turbocharger
(refer sr. No. 1) after ensuring that it is clean.
8.
Connect the cleaned standard assy. oil line.
9.
Run engine to ensure no oil leakage.