a. Introduction. To avoid repetition of instructions, general procedures for inspection of mixer body parts are
given below. Inspection procedures unique to a specific item will be covered in the section relating to that item.
(1) Using a magnifying glass in strong lights, inspect for cracks. Check carefully around studs, pipe plugs,
threaded inserts, sharp corners, and fillets.
Inspect machined surfaces for nicks, burrs, and raised metal. Mark damaged areas for repair.
(3) Use a straightedge or surface plate to check for warping of mating flanges. Inspect for discoloration
from oil leakage.
Inspect all threaded openings for damaged or stripped threads.
Ball Bearings. Refer to TM 9214 for inspection of bearings.
Studs. Inspect studs for stripped or damaged threads, looseness, or evidence of stretching.
Using a magnifying glass in strong light, inspect for cracks.
Inspect all gear teeth for wear, sharp fins, burrs, and galled or pitted surfaces.
Bushing and Bushing- Type Bearings.
(1) Inspect all bushings and bushing-type bearings for secure fit in their castings on mating parts. Check for
discoloration from heating on bushing or bearing surface.
Inspect bushings and bushing-type bearings for wear, burrs, nicks, and out-of-round condition.
Check for dirt in lubrication holes or grooves. Holes and grooves must be clean and free from damage.
Oil Seals. Do not replace metal-encased oil seals unless inspection indicates damage.
Inspect feather edge of seal for damage.
Check for loss of flexibility and resilience.
h. Core Hole Plugs. Inspect core hole plugs for evidence of leakage. Replace seals if they are damaged or if
leakage is evident.