TM-9-2815-225-34-P
ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2005
TM-9-2815-225-34-P - Page 194 of 736
TM 9-2815-225-34&P
0018 00
0018 00-8
PISTONS, CONNECTING RODS, AND BEARINGS (Contd)
ASSEMBLY
NOTE
Apply lubricating oil to all parts before assembly.
1.
Align oil holes in new bushing (10) with oil holes in connecting rod (6). Using press and
connecting rod bushing driver, install new bushing (10) in connecting rod (6). Ensure that
0.125 in. (3.175 mm) diameter rod can pass easily through oil holes.
2.
Install one retaining ring (4) in piston (5).
WARNING
Wear rubber gloves when installing piston pin to prevent
burns from boiling hot water or hot piston. Failure to comply
may result in injury to personnel.
3.
Heat piston (5) to 210° F (98.9° C) for 15 minutes in water or oven.
CAUTION
Do not use hammer or any other tool to install piston pin.
Install piston pin by hand only. Failure to comply may result
in damage to piston.
4.
Position connecting rod (6) in piston (5) and install connecting rod (6) to piston (5) with piston
pin (3).
5.
Install retaining ring (4) in piston (5).
NOTE
If one or more four-ring-groove pistons are to be replaced,
replace all pistons. New replacement piston will have three
piston ring grooves instead of four. Never mismatch pistons.
If you are installing three-ring-groove piston, perform step 6.
If you are installing four-ring-groove piston, perform step 7.
6.
Using piston ring expander, install three new piston rings (13), (14), and (15) on piston (5) with
word “top” facing up. Start with new oil control ring (13) on bottom, new second compression ring
(14) in middle, and new first compression ring (15) on top.
7.
Using piston ring expander, install four new piston rings (11), (12), (1), and (2) on piston (5) with
word “top” facing up. Start with new oil control ring (11) on bottom, new intermediate
compression ring (12) second from bottom, new second compression ring (1) in middle, and a new
first compression ring (2) on top.
8.
Install two dowel pins (7) in connecting rod cap (8).
NOTE
Always replace connecting rod bearings as a set.
9.
Install new connecting rod bearings (9) in connecting rod (6) and connecting rod cap (8).
10.
Repeat steps 1 through 9 for all remaining piston (5), connecting rod (8), and bearing (7)
assemblies.
11.
For piston, connecting rod, and bearing installation, refer to WP 0042 00.
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