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 682 of 856
INSPECTION-ACCEPTANCE AND REJECTION CRITERIA - Continued
10.
When installing a new connecting rod assembly, stamp cylinder number on connecting rod
(Figure 6, Item 18) and cap (Figure 6, Item 6) using metal stamping die set.
B
B
CRITICAL AREA
ACCEPTABLE LIMITS
NONCRITICAL
AREA
A
A
18
6
SECTION
B-B
SECTION
A-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_358
Figure 6.
Connecting Rod Inspection.
TM 9-2815-205-24
0094
0094-8
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