THROWER 6L6857 - Caterpillar

Electric Power Generation3512B GENSET (S/N: ZAJ1-UP)C175-16 GEN SET (S/N: WYB1-UP)Engine3512B (S/N: YBC1-UP; YAZ1-UP)3512E (S/N: SK31-UP; SK51-UP)3516B (S/N: JCN1-UP; YAR1-UP; ZAR1-UP; ZBR1-UP; YAW1-UP; YBW1-UP)C175-16 (S/N: 3A91-UP; M6A1-UP; Y3A1-UP; M6B1-UP; WYC1-UP; P6L1-UP; P5P1-UP; KWT1-UP; R1X1-UP)C175-20 (S/N: R4F1-UP; BXR1-UP)Off-Highway Truck/Tractor789C (S/N: 2BW1-UP)789D (S/N: SPD1-UP; SHH1-UP; TWP1-UP)793C (S/N: CBR1-UP; 4AR1-UP; ATY1-UP; 4GZ1-UP)793D (S/N: FDB1-UP)793F (S/N: SND1-UP; SSP1-UP; SXP1-UP)794 AC (S/N: MN51-UP; MT51-UP)795F AC (S/N: ERM1-UP)797F (S/N: LAJ1-UP; WSP1-UP)MT4400D AC (S/N: MH41-UP; MT41-UP)Power ModulePM3516 (S/N: BPD1-UP)XQC1200 (S/N: N1G1-UP)XQC1600 (S/N: N1M1-UP)Unit Rig Mining TruckMT4400 AC (S/N: SE41-UP)Wheel Loader994F (S/N: 4421-UP)994G (S/N: 8FR1-UP)994H (S/N: DWC1-UP)994K (S/N: MM91-UP; MRK1-UP)Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Connecting rods have been found in dealership inventory stock with rust and contamination in the drilled oil passage for the piston pin.Solution
Illustration 1 g06127987An inspection of this drilling is recommended prior to use for the connecting rod and cylinder pack part numbers listed in Tables 1 and 2.
Table 1
3500 Affected Part Numbers
New Reman Description
381-6555 10R-4030 Rod As.
— 10R-4029 Cyl Pack
— 10R-9224 Cyl Pack
— 20R-0582 Cyl Pack
— 10R-9258 Cyl Pack
— 20R-5616 Cyl Pack
— 20R-5629 Cyl Pack
— 20R-0583 Cyl Pack
— 10R-9267 Cyl Pack
— 20R-6412 Cyl Pack
Table 2
C175 Affected Part Numbers
New Reman Description
434-0488 20R-2805 Rod As.
434-0489 20R-2806 Rod As.
— 20R-2807 Cyl Pack
— 20R-2808 Cyl Pack
— 20R-2809 Cyl Pack
— 20R-2810 Cyl Pack
Illustration 2 g06137052
Unacceptable
Illustration 3 g06137055
Acceptable
All parts should be inspected via borescope. If bearing caps are removed, attention must be paid to ensure that fracture faces are not damaged or mismatched. The oil passage bore should be clean and free of corrosion or debris larger than 100um. For bores considered to be of acceptable cleanliness and unacceptable cleanliness refer to Illustrations 2 and 3. If the cleanliness is acceptable, a rust preventative coating of clean 15W-40 engine oil should be applied to the oil bore passage and the connecting rod or the cylinder pack should be repackaged in the original packaging or used.
Illustration 4 g06137065
6V-3182 Brush or 6V-7067 Brush
If the cleanliness of the bore is unacceptable, a nylon bristled brush is recommended to remove any contamination. The Cylinder block cleaning and tube brushes are available through the Cat® Hand Tools and Shop Supplies catalog. The 6V-3182 Brush or the 6V-7067 Brush is recommended.
Illustration 5 g06137078Before brushing, the brush length should be measured, and special care should be given to restrict the brush’s motion to prevent damage to the pin end bushing. In addition to limiting brush length, a clean lint-free towel can be rolled up and placed through the pin bushing to prevent damage.A clean petroleum-based solvent may be used to help with the cleaning of this passage. Chemicals and neutralizing agents are not recommended, as the risk of further contamination or material degradation cannot be avoided. After brushing, the rod oil passage should be flushed with the clean, filtered petroleum-based solvent. This should be followed with a rust preventative coating to the oil passage and connecting rod to prevent flash rust before use, clean 15W-40 engine oil can