31Y1-16170 Adjust Cylinder Seal Kit — Product Overview
The 31Y1-16170 Adjust Cylinder Seal Kit is a precision aftermarket replacement for Hyundai R140 and R210 series excavator adjust cylinders. Engineered for 75mm rod and 105mm bore hydraulic cylinders, this kit provides complete reseal coverage for the boom safety valve and adjust circuit on mid-size Hyundai excavators.
Adjust cylinders on Hyundai R140/R210 excavators regulate the boom safety valve — a critical component that controls hydraulic flow to prevent boom collapse during lifting operations. When adjust cylinder seals degrade, valve response becomes sluggish or erratic, causing boom drift and reduced precision in fine grading and material handling tasks. Hydraulic oil bypass across worn seals also leads to external leakage and system contamination.
The 31Y1-16170 kit features high-performance polyurethane rod seals for consistent valve actuation and NBR static seals etc for reliable fluid containment. DJF Seals supplies this kit at factory-direct wholesale pricing — one kit supporting Hyundai R140 and R210 adjust cylinder applications.
Technical Specifications
| Parameter | Specification |
| OEM Part Number | 31Y1-16170 |
| Compatible Brand | Hyundai |
| Cylinder Application | Adjust Cylinder (Boom Safety Valve) |
| Rod Diameter | 75 mm |
| Bore Diameter | 105 mm |
| Material | Polyurethane, NBR, PTFE etc |
| Kit Contents | Rod seal, Piston seal, Wiper, O-rings, Backup rings |
| Condition | New, Aftermarket Replacement |
| Business Type | Factory Direct Wholesale |
Compatible Models
- Hyundai R140LC-7A — Adjust Cylinder (Boom Safety Valve)
- Hyundai R210LC-7 — Adjust Cylinder (Boom Safety Valve)
- Hyundai R210LC-9 — Adjust Cylinder (Boom Safety Valve)
Key Features & Benefits
- Adjust Cylinder Precision — Rod and piston seals engineered specifically for the low-displacement, high-frequency actuation characteristics of boom safety valve adjust circuits on Hyundai R140/R210 excavators.
- Dual-Model Coverage — One kit fits both R140 and R210 platform adjust cylinders, streamlining parts inventory for Hyundai excavator fleets and independent repair shops.
- Consistent Valve Response — Polyurethane rod seal maintains consistent hydraulic pressure delivery to the boom safety valve, ensuring precise boom control during fine grading and material placement.
- Complete Reseal Kit — Includes rod seal, piston seal, wiper, O-rings, and backup rings — all seals required for a full adjust cylinder overhaul in one package.
- Factory-Direct Wholesale — Competitive pricing with flexible minimum order quantities. OEM/ODM service and custom packaging available for Hyundai parts distributors.
Description for part number 31Y1-16170
The 31Y1-16170 Hydraulic Cylinder Seal Kit is a high-quality replacement solution specifically designed for the Hyundai Excavator R140LC-7A repair. This kit contains all necessary hydraulic seals for the Adjust Boom Safety Valve, many of which are manufactured from proprietary materials (such as high-grade Polyurethane, NBR, and PTFE) and patented designs. These components offer superior compression set performance and a broader temperature application range. All seals are produced strictly to standard specifications, ensuring a precise match with your application for optimal performance and an ultra-long service life.
Recommended Application:
The 31Y1-16170 Seal Kit is custom-tailored for the Adjust Boom Safety Valve of the Hyundai Excavator R140LC-7A. It is an ideal choice for routine maintenance or emergency repairs, effectively preventing hydraulic leaks and maintaining system pressure.
Specifications for part number 31Y1-16170
| Feature | Details |
|---|---|
| Part Number | 31Y1-16170 |
| Brand Compatibility | Hyundai |
| Machine Type | Excavator |
| Model | R140LC-7A |
| Application Area | Adjust Boom Safety Valve |
| Rod Diameter | 90 mm |
| Bore Diameter | 145 mm |
| Material | High-performance Polyurethane, NBR, PTFE etc |
| Kit Contents | Piston seals, Rod seals, Wiper seals, O-rings, and Backup rings etc |
Compatible Models for part number 31Y1-16170
The 31Y1-16170 Seal Kit is compatible with the following Hyundai models and applications:
- Hyundai Excavator:
- R140LC-7A: Adjust Boom Safety Valve