TM 10-4320-307-24
4-7
TURBOCHARGER (HC3-16) REPAIR (CONT).
7.
Install new snap ring (10) into groove in bearing housing (2) at compressor end.
8.
Install new bearing (11) and new outer snap ring (12) over shaft and into bore of bearing housing
(2).
9.
Install new thrust ring (13), new thrust bearing (14), new spacer (15), and new thrust ring (16) over shaft and into bore
of bearing housing (2).
10. Install oil baffle (17), slinger (18), and new piston ring (19) over shaft and into bore of bearing housing (2).
11. Install new O-ring (20) and oil seal plate (21) and secure into bearing housing (2) with retaining ring (22).
12. Install compressor wheel (23), at room temperature, on shaft of shaft and wheel assembly (9), and secure as follows:
a.
Using lubrication oil, oil threads of locknut (24) and area of impeller face that will be under the nut.
b.
Install locknut (24) and tighten to 125-150 in-lbs (14.13 to 16.95 N
m) torque. This will seat compressor wheel
(23).
c.
Loosen locknut (24) and then tighten to 35 to 55 in-lbs (3.96 to 6.22 N
m) torque greater than drag torque.
NOTE
Drag torque is the torque required to move the nut on threaded portions of shaft before contact
with impeller.
d.
Tighten locknut (24) for shaft stretch of 0.009 to 0.010 inch (0.23 to 0.24 mm) using a T-handle or flexible socket.
e.
If shaft stretch cannot be measured, turn locknut (24) an additional 110 degrees after stop.
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