Home / For Montabert drifter / 86731312 Sealing Kit For Montabert Hc50 Drifter Rock Drill Seal Kit 86334281 Yamamoto 2686731312
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86731312 Sealing Kit For Montabert Hc50 Drifter Rock Drill Seal Kit 86334281 Yamamoto 2686731312

HC50 Drifter Seals – 86731312 Kit, In Stock

The 86731312 sealing kit is what we supply for a full front-head and back-head reseal on Montabert HC50 drifters. It matches 86334281 and Yamamoto 2686731312 right down to the material spec, so you don't end up chasing leaks or swapping seals out of schedule. Each kit ships with the O-rings, gaskets, and backup rings a HC50 overhaul calls for.

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86731312 Sealing Kit For Montabert Hc50 Drifter Rock Drill Seal Kit 86334281 Yamamoto 2686731312
#315
Highlights
Key Advantages
  • Built around Montabert’s original drawings for the HC50—no generic one-size-fits-all seals that fold under pressure.
  • Crosses directly with 86334281 and Yamamoto 2686731312; no guesswork on interchange.
  • Kit covers the full drifter: front-head, back-head, and all the sealing surfaces that see 200+ bar.
  • Materials are nitrile/PTFE blends rated for the hydraulic oils and temperatures common in underground and surface drilling.
  • Most orders ship same-day from shelf stock, which means you aren’t waiting weeks for a backorder.
Use Cases
Applications
  • Tunneling with Montabert HC50 mounted on jumbos.
  • Production benching in open pits—45–76 mm hole range.
  • Rock bolting and ground support cycles where down-pressure is constant.
  • Quarry work where the drifter cycles between percussion and retract all shift.
  • Civil trenching and foundation prep that runs the HC50 in dusty, wet conditions.
Specs
Technical Specifications
BrandMontabert
Part Number86731312
TypeSeals Kit
Compatible DrifterHC50
Direct Cross Reference86334281, Yamamoto 2686731312
Typically ShipsSame business day from inventory
Details
Detailed Description
Brand :Montabert
Part No. :86731312
Description :Seals Kit
Use in :Hc 50

Spot Supply Hydraulic MONTABERT Rock Drills HC50

 

Product of MONTABERT Rock Drills

 

Montabert hydraulic rock drill is a long rock breaking machine and rig design and manufacturing experience crystallization.
In-depth knowledge of the shock wave theory and the transmission mechanism of our engineers pioneered the development of new concepts and progressive hydraulic damping battle can wait.
Our close relationship between manufacturing and engineering, ultra-modern machining tools, and the precision heat treatment workshop of our St. Priest factory are some of the factors that enable us to provide hydraulic rock drills that are recognized as the world's leading.

 

Features of MONTABERT Rock Drills

1

 Energy recovery valve
This valve allows the piston rebound energy to be utilized for the next blow,
giving a definite advantage to the HC series drifters:
• Better efficiency
• No internal peak of pressure source of cavitation
• Best drifter protection
2

 Progressive blow energy
The unique design of the piston generates a perfect, long
trapezoidal-shaped shock wave:
• Better energy transmission to the bits
• Minimum stress into the drill string
• Better bit penetration

3

Hydraulic dampening system
The action of the dampening piston not only absorbs the lost
part of reflected energy but also ensures a constant thrust onto the tools:
• Optimum shock wave transmission
• Protection of the drifter and tools
• Reduced vibrations
4
Hydraulic reserve percussion
The optimal hydraulic reverse percussion system ensures a real back hammering:
• Tool extraction in fractured ground
• No rods left in the hole
Straight holes drilling
• When associated with Montabert drilling controls

Table attributes of Rock Drills

 
Weightkg104
Overall lengthmm825 - 996
Hole rangemm45-76
Shank adapter R25 FR28 FR32 FR32 MR38 MT38 M
Application BolingTunnelingBenchingt
Hydraulic reverse percussion No
FAQ
FAQ
Does this kit cover both the front-head and back-head on the HC50?
Yeah, the 86731312 kit includes what you need for the front-head shank seal area and the back-head accumulator and piston seals. It’s the same bundle Montabert packs under 86334281.
Is the 86731312 a direct swap for Yamamoto 2686731312?
It is. 86731312 and Yamamoto 2686731312 are the same physical seal set; just different part numbering. You can order either reference and you’ll get the correct HC50 seals.
What if my HC50 has been retrofitted or has aftermarket components?
The 86731312 kit fits factory-standard HC50s. If yours has been sleeved or modified, drop us the serial number or a photo of the drifter. We’ll double-check fit before we ship.
How fast can you get this kit out to a mine site or project?
We hold stock specifically for the HC50. Orders placed before 2 PM typically go out the same day. Transit time depends on your location, but most mine sites see it in 3–5 business days with express freight.
What hour interval do you recommend for resealing an HC50?
We see most outfits do a full reseal around 1,000 percussion hours, sometimes sooner if water or dust ingress shows up in oil samples. A 500-hour visual check on the shank seal area is a good practice.
Are these genuine Montabert or an alternative brand?
Genuine Montabert, under part 86731312. We don’t mix in aftermarket substitutes, so the compound hardness and fit match what the factory designed for the HC50’s hydraulic circuit.
Stock
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