Jcb 991-10111 Seal Kit is a cylinder seal kit available from WQC Parts.
This listing uses Hercules part number JCB-991-10111. Catalog description: M-SK-P-U-10-40X80.
Product Details
- Hercules part number: JCB-991-10111
- Product type: Hydraulic cylinder seal kit
- Reference brand/application: JCB
- Approximate weight: 0.191 lb
- Catalog data source: 2026 US Mobile Kit Catalog
Catalog Application Data
- Equipment type: Excavators - Compact; Telehandlers
- Model or series reference: 650/1
- Catalog page reference: 673, 674, 675, 696
Understanding This Seal Kit
- Wiper code P: press-in wiper
- Rod seal code U: U-seal
- Piston seal code 10: piston 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 JCB-991-10111 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.