Replacement of the Double Notch Piston Skirts on C9 Engines{1225} Caterpillar

Agricultural Tractor:

MT755 (S/N: ALM1-UP)

MT765 (S/N: AMS1-UP)

MTC755 (S/N: 8141-UP)

MTC765 (S/N: 8151-UP)

Combine:

Lexion 470 R (S/N: 7651-UP)

Lexion 475 R (S/N: 7671-UP)

Landfill Compactor:

816F Series 2 (S/N: BZR1-UP)

Soil Compactor:

815F Series 2 (S/N: BYN1-UP)

Engine:

C-9 (S/N: CLJ1-UP)

C9 (S/N: MTB1-UP; 9DG1-UP; X3R1-UP)

Generator Set:

C9 (S/N: C9E1-UP)

C9 MARINE (S/N: SJB1-UP)

C9 MARINE (S/N: C9A1-UP)

Industrial Engine:

C9 (S/N: JSC1-UP; MBD1-UP; JLW1-UP)

Marine Engine:

C9 (S/N: C9B1-UP; CSN1-UP; X9X1-UP; Z9X1-UP; X9Y1-UP)

Excavator:

330C (S/N: CYA1-UP; HAA1-UP; MCA1-UP; JAB1-UP; D3C1-UP; JCD1-UP; KDD1-UP; GAG1-UP; RBH1-UP; B1K1-UP; JNK1-UP; B2L1-UP; BTM1-UP; MKM1-UP; B4N1-UP; CAP1-UP; GKX1-UP; DKY1-UP; CGZ1-UP; 4ZF1-UP)

330D (S/N: RDA1-UP; KAB1-UP; PFC1-UP; NBD1-UP; GGE1-UP; NEF1-UP; B6H1-UP; EAH1-UP; LCJ1-UP; THJ1-UP; E4K1-UP; FFK1-UP; H3K1-UP; L2K1-UP; PCK1-UP; LEM1-UP; LRM1-UP; ERN1-UP; JLP1-UP; MWP1-UP; LDR1-UP; HAS1-UP; RAS1-UP; MEY1-UP; T2Y1-UP)

Track Feller Buncher:

511 (S/N: 5111-UP)

521 (S/N: 5211-UP)

522 (S/N: 5221-UP)

541 (S/N: 5411-UP)

TK711 (S/N: 1011-UP)

TK721 (S/N: 1021-UP)

TK722 (S/N: 1031-UP)

TK732 (S/N: 1041-UP)

TK741 (S/N: 2021-UP)

Motor Grader:

12H (S/N: CBK1-UP; AMZ1-UP; 1251-UP)

160M (S/N: B9E1-UP; B9L1-UP)

Mobile Hydraulic Power Unit:

330C (S/N: MSD1-UP; MSL1-UP)

330D (S/N: D3D1-UP; H3D1-UP)

Petroleum Engine:

C9 (S/N: P9L1-UP; KLW1-UP)

Track-Type Loader:

973C (S/N: BCP1-UP; LDX1-UP)

973D (S/N: LCP1-UP)

Track-Type Tractor:

D6R Series II (S/N: BNC1-UP; AFD1-UP; CAD1-UP; ADE1-UP; BLE1-UP; DAE1-UP; ACJ1-UP; BMJ1-UP; BRJ1-UP; BMK1-UP; BNL1-UP; AEM1-UP; AFM1-UP; AGM1-UP; BPM1-UP; AEP1-UP; BPP1-UP; BPS1-UP; BLT1-UP; FDT1-UP; AAX1-UP; BMY1-UP; BPZ1-UP; BRZ1-UP)

D6R Series III (S/N: GJB1-UP; WCB1-UP; HDC1-UP; RFC1-UP; TBC1-UP; HCD1-UP; HKE1-UP; WRG1-UP; MTJ1-UP; DMK1-UP; JEK1-UP; EXL1-UP; JDL1-UP; DLM1-UP; LFM1-UP; LGP1-UP; DPS1-UP; GMT1-UP; MRT1-UP)

D6T (S/N: JHB1-UP; SMC1-UP; JWD1-UP; LAE1-UP; DJG1-UP; WCG1-UP; WFH1-UP; LKJ1-UP; KJL1-UP; SKL1-UP; GCT1-UP; LAY1-UP; PEZ1-UP)

Wheel Dozer:

814F Series 2 (S/N: BXG1-UP)

Wheel Tractor-Scraper:

627G (S/N: DBD1-UP)

637G (S/N: DFJ1-UP)

Introduction

A new piston skirt with only one notch is now used. The asymmetrically designed piston skirt must be assembled correctly in order to avoid engine damage.

Note: If the piston skirt is not assembled correctly, the piston cooling jet will be damaged and a piston seizure will occur.

Refer to the appropriate Disassembly and Assembly Manual in order to remove and install the piston skirts. Refer to the appropriate Specifications Manual in order to find the proper torque specifications.

Required Parts

Table 1 contains the parts needed for this change.

Note: All six piston skirts must be changed at the same time. Do not use the double notch and single notch piston skirt together.

Installation Procedure

Illustration 1	g01593409
(1) Obsolete piston skirt (2) Two notches in the obsolete piston skirt

Illustration 2	g01592497
(3) Location of the piston cooling jet (4) New 324-7380 Piston Skirt (5) Location of the single notch in the new piston skirt

Illustration 3	g01616837
Bottom view of piston (6) Location of the part number on the connecting rod (7) Location of the part number on the skirt

Reuse all parts from the 238-2702 Piston and Rod Gp except the obsolete piston skirts. Replace the obsolete 158-0451 Piston Skirt , the 238-2709 Piston Skirt , and the 197-9379 Piston Skirt (1) with the new single notch 324-7380 Piston Skirt (4). Refer to Illustration 1 and Illustration 2. The skirt must be assembled to the connecting rod with the part number on the skirt (7) on the same side as the part number (6) on the forged connecting rod. The single notch in the new piston skirt (5) shall be opposite of the cap of the connecting rod. Refer to Illustration 2.