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HomeUpgrade & Repair KitsRepair & Service KitsEnginesEngine Gasket Kits421-9721: Engine Overhaul (Top End) Kit
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Upgrade & Repair KitsRepair & Service KitsEnginesEngine Gasket Kits
421-9721: Engine Overhaul (Top End) Kit
421-9721: Engine Overhaul (Top End) Kit

Marine Bundled Repair Solution, 3412 Engine Overhaul

Brand: Cat

Product Images
Oil Cooler and Lines Gasket Kit
21.08mm Inner Diameter Lifter Guide Spring
Engine Oil Filter
Single Cylinder Head Kit
Aftercooler & Lines Install Gasket Kit
100mm Long Taper Lock Steel Stud
3/8''-16 Cone Lock Nut
GASKET (F) KIT
Secondary Fuel Filter
Engine Water Temperature Regulator
3/8''-16 x 1 3/4'' Hex Flange Head Bolt
421-9721: Engine Overhaul (Top End) Kit

Marine Bundled Repair Solution, 3412 Engine Overhaul

Brand: Cat

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Items included

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420-8545: Oil Cooler and Lines Gasket Kit
420-8545: Oil Cooler and Lines Gasket KitQuantity: 1
305-6843: 21.08mm Inner Diameter Lifter Guide Spring
305-6843: 21.08mm Inner Diameter Lifter Guide SpringQuantity: 24
1R-1808: Engine Oil Filter
1R-1808: Engine Oil FilterQuantity: 2
419-5748: Single Cylinder Head Kit
419-5748: Single Cylinder Head KitQuantity: 2
219-6544: Aftercooler & Lines Install Gasket Kit
219-6544: Aftercooler & Lines Install Gasket KitQuantity: 1
106-1792: 100mm Long Taper Lock Steel Stud
106-1792: 100mm Long Taper Lock Steel StudQuantity: 24
2N-2766: 3/8''-16 Cone Lock Nut
2N-2766: 3/8''-16 Cone Lock NutQuantity: 16
420-2031: GASKET (F) KIT
420-2031: GASKET (F) KITQuantity: 1
1R-0749: Secondary Fuel Filter
1R-0749: Secondary Fuel FilterQuantity: 2
248-5513: Engine Water Temperature Regulator
248-5513: Engine Water Temperature RegulatorQuantity: 2
2N-2765: 3/8''-16 x 1 3/4'' Hex Flange Head Bolt
2N-2765: 3/8''-16 x 1 3/4'' Hex Flange Head BoltQuantity: 16
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DescriptionSpecificationsCompatible Models
Specifications for part number 421-9721

We are still working on adding a specification for this part.

Compatible Models for part number 421-9721

GENERATOR SET

3412C

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KeyKey
Factory Fit

This part is designed to fit your Cat equipment based on the manufacturer’s specifications.

Any changes to the manufacturer’s configuration might result in the product not fitting your Cat equipment. Please consult your Cat Dealer before purchasing to ensure that this part is appropriate for your Cat equipment in its current condition and assumed configuration. This indicator cannot guarantee compatibility for all parts.

Remanufactured

Non-Returnable

Kit

Replaced

Remanufactured

Non-Returnable

Kit

Replaced

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