Lycoming YO-233-B2A - Grit-Blasting

TEO-540-A1A Engine Maintenance Manual
© 2021 Avco Corporation. All Rights Reserved 05-30
February 2021 Page 35
YO-233-B2A Engine Maintenance Manual
Table 1 (Cont.)
Cleaning Guidelines for Engine Components
Component or Part
Cleaning Agent*
Guidelines
Oil cooler bypass valve
Mineral spirits, MIL-PRF-
680 or equivalent
degreasing solvent
CAUTION
DO NOT USE RAGS OR ANY LINT
CLOTH TO CLEAN THIS VALVE.
Soak the oil cooler bypass valve in
filtered mineral spirits.
Spark plugs
Commercially available
spark plug cleaner.
Refer to the spark plug manufacturer’s
cleaning instructions, regap spark plugs
after cleaning
Spark plug lead
connector, cable ends,
and ceramics
MEK
Acetone
Wood Alcohol
Naptha or equivalent
Refer to the “Spark Plug Cleaning”
procedure in this chapter.
Lead deposits
Refer to the “Lead Deposit Removal"
procedure in this chapter.
Removal of gasket
material
MEK
Acetone
Naptha or equivalent
Apply solvent to gasket material
Use a wooden scraper to remove gasket
material.
Wipe away all debris with clean lint-free
wipe.
Electrical connectors
CR4 or equivalent
Refer to contact cleaning solvent
manufacturer’s instructions.
Hartzell Engine
Technologies (HET)
(formerly Kelly
Aerospace) starter
Refer to starter manufacturer’s cleaning
instructions.
All other parts
Parts washer solvent using
Whirlwash-L or equivilant
Volcanic ash on engine
Refer to the “Volcanic Ash Removal”
procedure in this chapter.
*Refer to the manufacturer’s instructions for usage, safety data, and disposal of all cleaning agents.
2. Grit-Blasting
Do not grit-blast the following:
• Piston ring grooves and piston skirts
• Bushings
• Valve stems
• Gears
• Valve guides
• Any machined surface
• Bearing surfaces