CATERPILLAR EXCAVATORS:
• Caterpillar 320D/320D2/323D/323D2 C6.6 ACERT 6.6L Diesel (2007-2017)
• Caterpillar M316D/M318D C6.6 ACERT 6.6L Diesel (2007-2017)
CATERPILLAR WHEEL LOADERS:
• Caterpillar 924H/924HZ/928H/928HZ C6.6 6.6L Diesel (2007-2016)
• Caterpillar 930H/938H C6.6 6.6L Diesel (2007-2016)
CATERPILLAR MOTOR GRADERS:
• Caterpillar 120M/12M C6.6 6.6L Diesel (2007-2014)
CATERPILLAR TRACK LOADERS:
• Caterpillar 953D/963D C6.6 6.6L Diesel (2007-2015)
CATERPILLAR VIBRATORY COMPACTORS:
• Caterpillar CS-56/CS-64/CS-74/CP-56 C6.6 6.6L Diesel (2008-2016)
• Caterpillar CP-64/CP-74 C6.6 6.6L Diesel (2008-2016)
IMPORTANT:
CYLINDER #2 high-pressure line for the C6.6 ACERT COMMON RAIL engine (Perkins 1106D-E66TA). This 6-cyl engine has six unique lines — each is position-specific, NOT interchangeable. Installing on wrong cylinder risks a high-pressure leak at up to 29,000 psi.
Cat C6.6 = Perkins 1106D-E66TA. Perkins equivalents: 3525A201-A206. Do NOT confuse with Cat 3056E lines (216-9826 series) which use electronic unit injection — a different fuel system. If your engine has individual unit injectors rather than a common fuel rail, you need the 216-98xx set.
Never check for leaks by hand — use cardboard. Bleed system and check for fault codes after install.
⚠️ Confirm C6.6 ACERT common rail (not 3056E unit injection).
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