Home / Rock Drill Parts / Montabert HC 28 Rock Drill Repair Kit With Forging Process 86779964 86796299 101137783

Montabert HC 28 Rock Drill Repair Kit With Forging Process 86779964 86796299 101137783

Precision-Engineered Seal Repair Kit for Montabert HC 28 Rock Drills

Designed specifically for Montabert HC 28 rock drills, this OEM-compliant repair kit (P/N 86779964, also compatible with 86796299 and 101137783) delivers leak-proof performance under high-pressure, high-vibration conditions. Featuring premium polyurethane O-rings, fluoropolymer hydraulic seals, and multi-layer gaskets — all manufactured via controlled forging process for dimensional stability and fatigue resistance.

Prevents fluid loss, maintains system pressure, and blocks abrasive contaminants — extending service life and minimizing unplanned downtime in demanding underground and surface drilling operations.

Key Advantages

  • Forged-process polyurethane O-rings for superior compression set resistance and 3× longer service life vs. standard rubber
  • OEM-dimensioned seals for precise fit in HC 28 hydraulic cylinders, piston rods, gear motors, and pneumatic actuators
  • Multi-material construction: polyurethane (dynamic sealing), FKM fluoropolymer (high-temp hydraulic), and nitrile (static gasketing)
  • Certified contamination barrier design — tested to ISO 8573-1 Class 2 for particulate exclusion in dusty environments
  • Pre-sorted, labeled components with assembly guide — reduces technician error and field installation time by up to 40%

Applications

  • Underground hard-rock tunneling (TBM & raise boring support)
  • Surface quarry drilling and blast-hole preparation
  • Mining equipment maintenance (especially Montabert HC 28-equipped jumbos and rigs)
  • Rental fleet refurbishment programs requiring certified, traceable seal replacements
  • Emergency field repairs where hydraulic integrity and uptime are mission-critical

Technical Specifications

Primary Part Number86779964
Compatible ModelsMontabert HC 28 (all variants), HC 28-2, HC 28-3
Material CompositionPolyurethane (90A Shore A), FKM Viton®, NBR nitrile rubber
Temperature Range-30°C to +120°C continuous
Pressure RatingUp to 350 bar hydraulic / 12 bar pneumatic
CertificationsISO 9001:2015 manufacturing, RoHS compliant, REACH SVHC-free

FAQ

Is this kit compatible with non-Montabert HC 28 drills?
No — dimensions and tolerances are engineered exclusively for Montabert HC 28 series. Cross-application is not recommended due to risk of seal extrusion or pressure loss.
What’s the typical lead time for in-stock orders?
Standard lead time is 1–2 business days for in-stock kits; expedited shipping (DHL Express) available globally. Bulk orders (>5 units) require 5–7 days for quality verification.
Do you provide technical support for installation?
Yes — free access to our HC 28 seal mapping diagram, torque specs, and step-by-step video guide upon purchase. Dedicated engineering support available for fleet customers.

Detailed Description

A seal repair kit is an essential maintenance toolset designed for rock drills, including Montabert models, used to replace worn or damaged seals in the hydraulic and pneumatic systems. Seals play a critical role in preventing leaks, maintaining pressure, and ensuring the overall efficiency and performance of the equipment. The seal repair kit contains various types of seals and gaskets necessary to maintain the integrity of the drilling machine. Below is a detailed description and introduction to the seal repair kit:

Description

The seal repair kit for Montabert rock drills includes a variety of seals, O-rings, gaskets, and other components made from high-quality materials such as rubber, polyurethane, and fluoropolymer. These materials are selected for their durability, resistance to wear, and ability to withstand extreme pressure and temperature fluctuations.

Each seal in the kit is designed to fit specific parts of the rock drill, such as hydraulic cylinders, pistons, rods, and gear assemblies. The purpose of the seals is to prevent hydraulic fluid or air from leaking out of the system, ensuring that the rock drill maintains optimal performance. The seals also help protect the internal components from contamination by dirt, dust, and debris, extending the life of the machine.

Key Features

  1. Comprehensive Set: The kit includes a wide variety of seals, O-rings, and gaskets designed to replace worn components in multiple areas of the drill, including hydraulic, pneumatic, and gear systems.
  2. High-Quality Materials: Seals are made from durable, wear-resistant materials such as rubber, polyurethane, and fluoropolymer, ensuring long-lasting performance and resistance to extreme conditions.
  3. Leak Prevention: The seals are designed to maintain tight seals in high-pressure hydraulic and pneumatic systems, preventing fluid or air leaks and ensuring the drill operates efficiently.
  4. Protection from Contamination: In addition to preventing leaks, the seals help keep dust, dirt, and other contaminants out of the system, protecting internal components from premature wear.
  5. Easy Installation: The kit is designed for easy installation, making it straightforward for maintenance teams to replace seals and reduce downtime during repairs.

Introduction

The seal repair kit is a crucial tool for maintaining the performance and reliability of Montabert rock drills. Over time, seals can become worn due to the constant pressure, vibration, and environmental conditions in which rock drills operate. Regular maintenance with a seal repair kit helps to prevent leaks, maintain hydraulic and pneumatic pressure, and protect internal components from contamination.

By replacing worn or damaged seals with high-quality replacements from the kit, operators can avoid costly breakdowns and ensure the rock drill continues to operate at peak efficiency. The seals in the kit are engineered to meet the exact specifications of Montabert rock drills, ensuring a perfect fit and reliable performance.

In summary, the seal repair kit is an essential maintenance resource for Montabert rock drills, providing all the necessary seals and gaskets to keep the equipment running smoothly. Its high-quality components and comprehensive coverage make it an indispensable part of routine maintenance, helping to extend the life of the drill and reduce operational costs associated with repairs and downtime.

Ensure Uptime. Order Your HC 28 Repair Kit Today.

Ships same day — backed by 24-month material warranty and OEM-fit guarantee.

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