2010/11/22 New Connecting Rod for the C6.6 Engine {1225} Caterpillar

New Connecting Rod for the C6.6 Engine {1225}

2010/11/22 [SEPD1207]

2010/11/22 Improved Servicing is Available for the Fuel Injection Pump for C6.4 and C4.2 Engines on Certain Excavators and Mobile Hydraulic Power Units {1251, 1290}

BASIC ENGINE

PISTON & ROD GP

2010/11/22 New Connecting Rod for the C6.6 Engine {1225}

Asphalt Paver:
AP600D (S/N: TFM1-UP; TFZ1-UP)
AP655D (S/N: GNN1-UP)
AP655D (S/N: MAN1-UP)
AP655D (S/N: MAT1-UP)
AP655D (S/N: GNZ1-UP)
BG600D (S/N: B6K1-UP)
BG655D (S/N: BPA1-UP; B5D1-UP)
Excavator:
M316D (S/N: W6A1-UP)
M318D (S/N: W8P1-UP; W8R1-UP)
M322D (S/N: W2S1-UP; W2T1-UP)
Integrated Toolcarrier:
IT38H (S/N: JNJ1-UP)
Load Haul Dump:
R1300GSeries II (S/N: RSL1-UP)
Motor Grader:
120M (S/N: B9C1-UP; B9N1-UP; B9W1-UP; D9W1-UP)
12M (S/N: B9F1-UP; B9R1-UP)
Pipelayer:
PL61 (S/N: WGS1-UP)
Vibratory Soil Compactor:
CP56 (S/N: C5P1-UP; FCP1-UP)
CP64 (S/N: P7F1-UP; C6P1-UP)
CP74 (S/N: P8F1-UP; C8P1-UP)
CP76 (S/N: C7L1-UP; JCP1-UP)
CS56 (S/N: C5S1-UP; FCS1-UP)
CS64 (S/N: C7F1-UP; C6S1-UP)
CS74 (S/N: C8F1-UP; C8S1-UP)
CS76 (S/N: JCS1-UP; CYX1-UP)
Track-Type Loader:
953D (S/N: LBP1-UP)
963D (S/N: LCS1-UP)
Track-Type Tractor:
D6K (S/N: DHA1-UP; NCF1-UP; HMG1-UP; FBH1-UP)
D6N (S/N: DJA1-UP; JAH1-UP; LJR1-UP; GHS1-UP; MLW1-UP; DJY1-UP)
Wheel Loader:
924H (S/N: HXC1-UP; JTM1-UP; KLN1-UP)
924HZ (S/N: RCB1-UP; WLB1-UP; PED1-UP; BEF1-UP)
928H (S/N: RSB1-UP)
928HZ (S/N: BYD1-UP; CXK1-UP)
930H (S/N: DHC1-UP; FTD1-UP)
938H (S/N: MCC1-UP; MJC1-UP; JKM1-UP; LKM1-UP)
Wheel Tractor-Scraper:
613G (S/N: ESB1-UP; DBE1-UP)

Description of Change:

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Illustration 1	g02139034
Typical example

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Illustration 2	g02139035
Typical example

A new design of connecting rod (2) has been introduced. The new design of connecting rod has three grades. Refer to table 1 for more information. The new connecting rods have smaller fasteners (3) than the existing connecting rods (1) .

Adaptable To: The new connecting rod was introduced from engine serial number C6E23831.

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Table 1
Existing Part Number	Grade	New Part Number	Grade	Color
276-7479	F	331-0291	R	Red
276-7483	J	331-0290	G	Green
276-7481	L	331-0292	B	Blue

The new 323-9312 Bolt must be used with the new design of connecting rod (2). The existing 225-5439 Special Bolt must be used with the existing connecting rod (1) .

Note: The connecting rods (1) and (2) must not be used in the same engine.

New Procedure for Tightening the Fasteners for the Connecting Rod

The existing fasteners for the connecting rod have a torque of 70 N·m (52 lb ft). The new 10 mm fasteners have an initial torque of 40 N·m (30 lb ft). The new 10 mm fasteners must be tightened through an angle of 120 degrees. The fasteners must be used once.