TM-9-2815-205-24
6V53/6V53T ENGINES, DIESEL WITH CONTAINERS; MODEL 5063-5299, MODEL 5063-5392, MODEL 5063-5393 AND MODEL 5063-539L
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE
FEBRUARY 2013
TM-9-2815-205-24 - Page 704 of 856
INSPECTION-ACCEPTANCE AND REJECTION CRITERIA - Continued
8.
If new connecting rod is required, stamp cylinder number on connecting rod (Figure 5, Item 22) and cap
(Figure 5, Item 7) using metal stamping die set.
CRITICAL AREA
ACCEPTABLE LIMITS
NONCRITICAL
AREA
A
A
22
7
SECTION
A-A
VIEW A
VIEW A
DO NOT USE OR ATTEMPT TO
REPAIR RODS WITH INDICATIONS
OVER 0.005 in . (0.13 mm) DEEP
EXTENDING OVER EDGES OF "H"
SECTION ON BOTH SIDES OF
FLANGE. SHADED AREAS ARE
MOST HIGHLY STRESSED.
START OF FATIGUE CRACK
RESULTING FROM OVERLOADING
(DUE TO HYDROSTATIC LOCK).
DO NOT ATTEMPT TO REPAIR.
EXAMPLE OF A TRANSVERSE
INDICATION THAT DOES NOT
FOLLOW LONGITUDINAL FORGING
FLOW LINES CAN BE EITHER A
FORGING LAP, HEAT TREAT CRACK,
OR START OF A FATIGUE CRACK.
INDICATIONS IN NONCRITICAL
AREAS ARE ACCEPTABLE UNLESS
THEY ARE OBVIOUS CRACKS
WITHOUT MAGNETIC INSPECTION.
LONGITUDINAL INDICATIONS
FOLLOWING FORGED FLOW LINES
ARE USUALLY SEAMS AND ARE NOT
HARMFUL IF LESS THAN 0.03 in.
(0.8 mm) DEEP.
DETERMINE DEPTH
BY GRINDING A SMALL AREA NEAR
THE CENTER OF THE INDICATION.
ACCEPT TRANSVERSE INDICATIONS (ACROSS
FLOW LINES) HAVING A MAXIMUM GRINDING
LENGTH OF 0.5 in. (12.7 mm) AND DEPTH OF
0.016 in. (0.41 mm) AFTER COMPLETE REMOVAL.
AN EXCEPTION IS A ROD HAVING AN INDICATION,
WHICH EXTENDS OVER THE EDGE OF THE "H"
SECTION AND IS PRESENT ON BOTH SIDES OF
THE FLANGE. THEN THE MAXIMUM ALLOWABLE
DEPTH IS 0.005 in. (0.13 mm). SEE SECTION A-A.
GRINDING NOTES:
TAKE CARE IN GRINDING
OUT
INDICATIONS TO ENSURE PROPER
BLENDING OF GROUND AREA
INTO UNGROUND SURFACE SO AS
TO FORM A SMOOTH CONTOUR.
POOR
PRACTICE
GOOD
PRACTICE
EXAMPLE OF AN
INDICATION FOLLOWING
LONGITUDINAL FORGING
FLOW LINES.
MAINT_375
Figure 5.
Connecting Rod Inspection Procedures.
9.
Inspect bearing shells for scoring, pitting, flaking, etching, and dirt grooving. If defective, discard
bearing shells.
10.
Discard bearing shells with bright spots on backs indicating movement in bearing caps or supports.
TM 9-2815-205-24
0095
0095-8
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