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TM 10-3930-659-34
5-8.
TURBOCHARGER TEST AND REPAIR (Cont).
CAUTION
DO NOT spray dry cleaning solvent directly into compressor or turbine housing. Direct spray may
damage parts.
1.
Clean exterior of turbocharger (1) with dry
cleaning
solvent.
Dry
thoroughly
with
compressed air.
2.
Using dial indicator set, position indicator tip
through center housing oil return (2) until it
contacts wheel and shaft assembly (3). Zero
dial indicator.
3.
Hold wheel and shaft assembly (3) at both ends,
and move up and down with equal pressure.
Ensure that rotation is in same direction as dial
indicator tip travels. Maximum allowable bearing
clearance is 0.006 in. (0.152 mm).
4.
Remove dial indicator from center housing oil
return (2) and position so indicator tip rests on
end of wheel and shaft assembly (3). Zero dial
indicator.
5.
Move wheel and shaft assembly (3) back and
forth. Maximum allowable end play is 0.004 in.
(0.102 mm).
b. DISASSEMBLY
1.
Mark turbine housing (6), compressor housing
(4), and center housing (5) to aid during
assembly.
2.
Remove six screws (9), three lockplates (10),
and compressor housing (4) from center housing
(5).
3.
Remove six screws (7), two lockplates (8), and
center housing (5) from turbine housing (6).
5-56
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