CATERPILLAR EXCAVATORS:
• Caterpillar 320E/323F/326F/330F C4.4/C6.6/C7.1 Diesel (2010-2020)
JCB BACKHOE LOADERS:
• JCB 3CX/4CX 1204E 4.4L Diesel (2012-present)
PERKINS INDUSTRIAL ENGINES:
• Perkins 1204E-E44TTA/1206E-E66TTA/1206E-E70TTA 1200 Series 4.4-7.0L Diesel (2010-present)
IMPORTANT:
Perkins T405824 is the REAR SIDE timing gear cover gasket for the Perkins 1200 series engine. Cat equivalent is 330-4778. Do NOT confuse with T406926 or T406050 which are FRONT side gaskets. The 1200 series timing cover uses separate front and rear gaskets — they are not interchangeable. Mixing up front and rear is the most common ordering error with these parts.
The Perkins 1200 series powers Cat excavators (320E/323F/326F/330F), JCB backhoe loaders, generator sets, and many industrial applications. Failure symptoms: oil weeping from the timing cover area at the front of the engine. When replacing, inspect the front crankshaft seal and any O-rings. Clean all old gasket material from both mating surfaces.
⚠️ REAR side gasket. Cross-ref: Perkins T405824 = Cat 330-4778. Verify front vs rear position.
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