Figure 34. Center housing - sectional view.

TM 5-6115-400-35

(2) Turbine End and other parts.

(a) The

turbocharger

must

completely

disassembled

satisfactorily clean the turbine end.

(b) Submerge and soak all parts in an

approved metal cleaner.

The

cleaning solution should be agitated

to do a satisfactory job, but take

special care that parts are not

allowed to strike each other.

are thoroughly cleaned. Deposits

left on the blades will affect

balance.

(d) Carefully

inspect

parts

specifications detailed in paragraph

(e) Using compressed air, blow out all

oil passages/internal cavities in the

center housing and center housing

thrust plate assembly to make

certain they are open and clean.

Note.

Bend a small screwdriver at right

angles near its end so it can-be used

as a scraper. The oil outlet (fig. 34)

must be completely cleared of

carbon so the lubricating oil from the

bearing can escape without going

around the turbine wheel.

f. Turbocharger Inspection. If lack of lubrication

results in bearing seizure, or if impellers are damaged

by foreign objects passing through the turbine or

compressor, the resultant damage will be extensive and

require replacement of the rotating parts or of both

rotating parts and center housing. To properly assess

the extent of damage/wear, it is recommended that the

turbocharger be completely disassembled and all parts

Figure 34. Center housing - sectional view.

inspected at time of engine overhaul. In general, parts

must not show signs of damage, corrosion, or

Caution.

deterioration. Threads must not be nicked, stripped, or

Do not allow cleaning fluid to get

crossed. Burnish or polish out minor surface damage

into the bearing area. Never use

using silicone carbide abrasive cloth for aluminum parts

caustic cleaning solution as this will

and crocus cloth for steel parts. At time of-- repair or

damage certain parts. Use only a

overhaul, replace preformed packing, sealing ring, spiral

soft brush, plastic blade scraper and

lockring, and locking plates. Make certain all parts are

compressed air jet for removing

thoroughly clean and work bench area is clean and free

deposits of dirt. Never use a wire

of any abrasive material before proceeding with

brush or a steel blade scraper for

inspection of individual parts.

this purpose.