TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Piston (001-043)
Section 1 - Cylinder Block - Group 01
Page 1-81
Clean (001-043-006)
CAUTION
Do not use the bead-blast method to clean the piston.
The piston can be damaged by blast material embed-
ded in the aluminum.
Soak the pistons in cold parts cleaner.
Soaking the pistons overnight will usually loosen the car-
bon deposits.
CAUTION
Do not clean the pistons and rods in an acid tank.
Wash the pistons and rods in a hot soapy, solution.
CAUTION
Do not use a ring groove cleaner and be sure not to
scratch the ring sealing surface in the piston groove.
Clean the remaining deposits from the ring grooves with
the square end of a broken ring.
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
personal injury.
WARNING
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause bodily
injury.
Wash the pistons again in a detergent solution or solvent.
Dry with compressed air.
L-759
