Caterpillar 1336686 Seal Kit

Caterpillar 1336686 Seal Kit is a Hercules catalog product available from WQC Parts for hydraulic cylinder, seal kit, pump, motor, valve, and heavy-equipment repair applications.

This listing uses Hercules part number CTC-1336686. Catalog description: LNUT-STL-M56-2x80-Flatsx57 HGT.

Product Details

• Hercules part number: CTC-1336686
• Product type: Hydraulic cylinder seal kit
• Reference brand/application: Caterpillar
• Approximate weight: 2.462 lb
• Catalog data source: 2026 US Seal Catalog, 2026 US Mobile Kit Catalog, 2026 US Industrial Catalog, 2026 US Cylinder Catalog

Catalog Application Data

• Catalog section: Repair Accessories
• Equipment type: Telehandlers
• Model or series reference: M56, 57, 80, 289, 59
• Style / kit type: Or By Contacting Your Regional Hercules Sales Team.; M56 × 2; CTC-1336686
• Size / dimension reference: 57 mm; 80 mm
• Catalog page reference: 829, 517, 203, 131

Use this product when your parts book, service manual, cylinder repair list, pump/motor breakdown, or existing component calls for CTC-1336686. It is intended to help restore sealing performance, reduce leakage, and support reliable equipment repair when correctly matched to the application.

Fitment Verification

Before ordering, confirm the CTC-1336686 reference against your OEM reference number, machine model, cylinder location, bore and rod size, pump/motor series, and serial-number range. Manufacturer names and part numbers are used for identification and fitment reference only. If you are unsure, compare the old parts, measurements, and parts-book callout before installation.