HERCULES
Hercules Komatsu 707-99-77120 Seal Kit
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Hercules Komatsu 707-99-77120 Seal Kit is a cylinder seal kit available from WQC Parts.
This listing uses Hercules part number KOM-707-99-77120. Catalog description: M-SK-P-UB-14-140x200.
Product Details
- Hercules part number: KOM-707-99-77120
- Product type: Hydraulic cylinder seal kit
- Reference brand/application: Komatsu
- Approximate weight: 1.687 lb
- Catalog data source: 2026 US Mobile Kit Catalog
Catalog Application Data
- Equipment type: Excavators; Backhoe Loaders
- Catalog page reference: 970, 972, 1010
Understanding This Seal Kit
- Wiper code P: press-in wiper
- Rod seal code UB: U-seal with buffer
- Piston seal code 14: four-piece capped T-seal
The code separates the wiper, rod-seal and piston-seal arrangements so you can compare them with the cylinder being repaired. A wiper helps exclude dirt at the rod entry; rod seals and piston seals fit different locations in the cylinder.
These terms explain the Hercules identification code shown above. Match the kit reference to the original assembly; the code is an identification aid, not a complete packing list.
Fitment Verification
Before ordering, confirm the KOM-707-99-77120 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.