TM-9-2990-206-34P
TURBOSUPERCHARGER AlRESEARCH MODEL T18C01
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)
TM-9-2990-206-34P - Page 19 of 85
Table 2-1. Troubleshooting - Continued.
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
7. Compressor wheel and turbine wheels appear very loose when moved in and out or
up and down by hand, evidenced by excessive noise.
Worn sleeve bearings, thrust ring, or thrust bearing.
Disassemble and repair turbosupercharger. Refer to page 3-1.
8. Compressor wheel and turbine wheels turn freely, without binding or rubbing,
when spun by hand.
a. Check Radial Clearance.
If necessary remove mounting leg
before removing drain tube.
(1)
(2)
(3
)
(4)
(5)
(6)
(7)
Using 9/16 inch double offset
box wrench, remove two bolts
and lockwashers (A).
Remove oil drain tube (B).
Remove and discard gasket (C).
Position a dial indicator (D) on
mounting leg (or any flat sur-
face) so that the plunger ex-
tends through the oil drain hole
and contacts the turbine wheel
shaft.
Apply equal pressure to the com-
presser wheel and turbine wheel
to move the turbine wheel shaft
away from the indicator plunger.
Set the dial indicator to zero.
Apply equal pressure to the com-
presser wheel and turbine wheels
to move the turbine wheel shaft
as far as possible toward the
indicator plunger. Note radial
clearance on indicator dial.
NOTE
Verify that the reading is the maximum obtainable by
rotating the wheels slightly in both directions while
applying pressure.
TA097805
2-3
TM 9-2990-206-34&P
Back to Top
