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 684 of 856
INSPECTION-ACCEPTANCE AND REJECTION CRITERIA - Continued
NOTE
Fit new or used piston to corresponding cylinder liner and retain as matched set for
assembly in engine.
14.
For fitting piston, using a micrometer set, measure piston skirt outside diameter (Figure 8, Item B) parallel to
and perpendicular with piston pin bore at room temperature, 70° F (21° C). Skirt diameter for model
5063-5299 is 3.8699–3.8721 inches (98.3–98.35 mm).
NOTE
Thickness gages must be perfectly flat and free of nicks and bends.
Select a thickness gage thickness requiring six pounds pull to move. Piston to liner
clearance is 0.001 inch (0.025 mm) greater than thickness of thickness gage used.
For example, a 0.004 inch (0.102 mm) thickness gage indicates 0.005 inch
(0.127 mm) clearance when withdrawn with a six pound pull.
15.
With cylinder liner (Figure 8, Item 1) in cylinder block, hold piston (Figure 8, Item 10) upside down in liner
and measure clearance in four places, 90 degrees apart, using a thickness gage (Figure 8, Item 21)
attached to a spring scale (Figure 8, Item 20). Clearance for model 5063-5299 must be 0.0027–0.0068 inch
(0.069–0.173 mm) for new parts and to 0.010 inch (0.25 mm) for used parts.
B
B
B
B
90°
20
21
10
1
MAINT_360
Figure 8.
Piston Fitting.
16.
If binding occurs between piston and liner, remove piston and examine piston and liner for burrs. Remove
burrs on piston with an X-fine sharpening stone. Remove burrs in liner with fine flat hone and
recheck clearance.
17.
For fitting piston rings, insert piston ring inside cylinder liner in normal area of ring travel. Using the piston,
push ring down parallel with top of liner (Figure 9, Item 1). Measure ring gap with thickness gage. Repeat
procedure for balance of compression and oil rings.
TM 9-2815-205-24
0094
0094-10
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