TM 9-2815-205-34
(13) Place turbine wheel assembly (19), wheel
shroud (22), center housing (2), and
backplate (25) upright in turbocharger
(14)
holding fixture.
With compressor wheel (21) at room
temperature, position it over shaft of
turbine wheel assembly (19).
Turn compressor wheel nut
with a double universal socket
to prevent bending turbine
wheel shaft.
(15)
(16)
(17)
(18)
(19)
Lubricate threads of turbine wheel
assembly (19) and wheel face on
compressor wheel (21) with engine oil.
Install self-locking nut (20). Torque nut to
125-150 lb-in (14-17 N
.
m) to seat
compressor wheel against thrust spacer.
Loosen self-lockin nut (20) and inspect
nut face and front face of compressor
wheel to ensure they are smooth and
clean.
Torque self-locking nut (20) to 35-55 lb-in
(4-6 N
.
m).
Turn self-locking nut (20) an additional
120-130 degrees.
Check bearing axial end play as follows:
(a)
(b)
(c)
Clamp center housing assembly in
soft-jawed vise.
Fasten magnetic base dial indicator
(41) to center housing with indicator
tip resting on end of rotating shaft on
compressor side.
Move shaft axially back and forth by
hand. Total indicator reading should
be between 0.003 and 0.010 inch.
Replace shaft assembly if readings
are not in limits.
3-345