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Component or Part
Precision fuel injector
nozzles
AVStar fuel injector
nozzles
Fuel injector inlet screen
Fuel pump plunger
Electrical connectors
Hartzell Engine
Technologies (HET)
(formerly Kelly
Aerospace) starter
All other parts
Volcanic ash on engine
*Refer to the manufacturer's instructions for usage, safety data, and disposal of all cleaning agents.
2. Crankshaft Cleaning
CAUTION
DO NOT MAKE SCORES, SCRATCHES, OR ETCH MARKINGS OF ANY
KIND ON THE CRANKSHAFT SINCE THEY CAN CAUSE THE PART TO
WEAKEN AND TO FAIL.
DO NOT USE WIRE BRUSHES OR METAL SCRAPERS ON BEARINGS OR
CONTACT SURFACES.
A. Clean the inside of all crank pin journals, main bearing journals, and all oil passages with
bristle (non-wire) brushes.
B. Clean all parts thoroughly with mineral spirits (MIL-PRF-680) or equivalent.
C. Dry the crankshaft with compressed air.
D. Apply preservative oil to the crankshaft to prevent corrosion.
3. Crankshaft Counterbore Cleaning
A. Flush the crankshaft counterbore and alignment dowel pin with mineral spirits (MIL-PRF-
680) or equivalent or Stoddard Solvent or equivalent solvent to remove any debris.
05-30
Page 36
Table 1 (Cont.)
Cleaning Guidelines for Engine Components
Cleaning Agent*
®
Hoppes
No. 9 Gun
Cleaning Solvent and
Stoddard Solvent,
Alkon Cleaner,
Methyl-ethyl-ketone (MEK)
Acetone
Methyl-ethyl-ketone (MEK)
Acetone
MEK
Acetone
Cold Dip Tanks (or closed
tank system) and use
NALCO 1704
CR4 or equivalent
Parts washer solvent using
Whirlwash-L or equivilant
IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Guidelines
Refer to the "Injection Nozzle Cleaning"
section in this chapter.
Refer to the "Injection Nozzle Cleaning"
section in this chapter.
(1) Clean in an ultrasonic cleaner.
(2) Blow dry with compressed air.
Refer to the "Steel, Aluminum or
Magnesium Parts Cleaning" procedure in
this chapter.
Refer to contact cleaning solvent
manufacturer's instructions.
Refer to starter manufacturer's cleaning
instructions.
Refer to the "Volcanic Ash Removal"
procedure in this chapter.
© 2020 Avco Corporation. All Rights Reserved
March 2020
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