B. F i l l t h e b e a r i n g h o u s i n g c a v i t y w i t h
be done to ensure that no foreign materi-
clean engine oil.
Turn the rotating
al is carried from the engine into the
a s s e m b l y by hand to coat all of the in-
turbocharger lubrication system.
ternal surfaces with oil.
1. Attach a chain hoist and a suitable
lifting sling to the turbocharger assem-
C. A d d a d d i t i o n a l c l e a n e n g i n e o i l t o
bly.
completely fill the bearing housing
c a v i t y a n d r e i n s t a l l t h e o i l l i n e . Cle-
2. Remove the covers from the air inlet
a n off any spilled oil.
and exhaust outlet openings on the en-
D. S t a r t a n d r u n t h e e n g i n e a t i d l e u n t i l
gine that were placed over the openings
oil pressure and supply has reached
when the turbocharger was removed.
Install inlet shield J 26554 in place (see
all of the turbocharger moving parts.
A good indicator that all of the mov-
ing parts are getting lubrication is
3. Place the turbocharger assembly into
when the oil pressure gauge registers
position on the mounting bracket. Use a
pressure (10 psig or 69 kPa at idle
new gasket between the exhaust manifold
speed).
adaptor and the turbine housing flange.
4. Secure the turbocharger to the mount-
ing bracket with bolts, lock washers and
nuts.
Tighten the nuts just enough to
D o not hold the compressor wheel
hold the turbocharger tight against the
f o r any reason, while the engine is
bracket.
running.
This could result in
p e r s o n a l injury.
The free floating bearings in the tur-
bocharger center housing require pos-
W h e n self-locking nuts are used to
itive lubrication. This is provided by
secure t h e t u r b o c h a r g e r t o t h e
the above procedure before the tur-
m o u n t i n g bracket, be sure there is
bocharger reaches its maximum oper-
full thread engagement (at least one
full thread above the nut) of the
ating speed which is produced by
s e l f - l o c k i n g nuts on the bolts.
h i g h engine speeds.
Starting any
turbocharged engine and accelerating
to any speed above idle before engine
5. Slide the blower air inlet tube hose
oil supply and pressure has reached
over the compressor housing outlet open-
the free floating bearings can cause
ing and secure it in place with the hose
severe damage to the shaft and bear-
ings of the turbocharger.
clamps.
6. Tighten the turbocharger to exhaust
10. Check all ducts and gaskets for
manifold adaptor bolts securely.
Then
leaks.
remove the chain hoist and lifting sling
from the turbocharger.
11. Operate the engine at rated output
and listen for sounds of metallic contact
7. Install the oil drain line between the
If any such
from the turbocharger.
opening in the bottom side of the center
noise is apparent, stop the engine imme-
housing and the cylinder block.
diately and correct the cause.
8. Attach the oil inlet line to the cylinder
NOTE
block.
After the turbocharger has been
9. After installing a rebuilt or new tur-
operating long enough to permit
bocharger, it is very important that all
the unit and the oil to warm up,
moving parts of the turbocharger center
the rotating assembly should coast
h o u s i n g be lubricated as follows:
freely to a stop after the engine is
stopped.
If the rotating assembly
jerks to a sudden stop, the cause
A. Clean the area and disconnect the oil
should be immediately determined
inlet line at the bearing housing (see
a n d eliminated.
11D-29
Air Intake System
