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Nitrogen Diaphragm 86634003 Montabert HC109 HC120 HC150 Ingersoll-Rand 2686634003 membrane

86634003 Nitrogen Diaphragm – Direct Fit for Montabert HC109/HC120/HC150 and Ingersoll-Rand 2686634003

The 86634003 diaphragm keeps your Montabert HC109, HC120, or HC150 drifter hammering at full power. It's also a drop-in match for Ingersoll-Rand 2686634003. No trimming, no adapters—just pull the old one, clean the seat, and bolt this in.

We've seen a lot of diaphragm failures, and the two big killers are heat and uneven clamping pressure. This part uses a compound that handles both—holds nitrogen pressure longer, and doesn't crack around the bolt holes after a few hundred hours. In most rigs, you're looking at a swap every 500–800 hours instead of chasing leaks every other shift.

  • Gas-tight seal that keeps blow energy consistent across the shift
  • Same bolt pattern and thickness as the original—no guesswork on torque
  • Cuts unplanned downtime when you keep one on the shelf

Send us your serial number and we'll double-check fitment. If you're stocking for a fleet, ask about bulk pack pricing.

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Nitrogen Diaphragm 86634003 Montabert HC109 HC120 HC150 Ingersoll-Rand 2686634003 membrane
#216
Highlights
Key Advantages
  • Direct swap for Montabert HC109, HC120, HC150 and Ingersoll-Rand 2686634003—no rework needed
  • Holds nitrogen charge longer, so your hammer doesn't lose punch halfway through a round
  • Tear-resistant around the clamping edge—fewer blowouts in hard granite or abrasive ground
  • Goes in fast with basic hand tools; most crews can do it on-site without sending the hammer out
  • Way cheaper than replacing the whole accumulator or dealing with a scored cylinder wall
Use Cases
Applications
  • Montabert HC109 drifter nitrogen chamber rebuilds
  • HC120 rock drill accumulator membrane replacement
  • HC150 hammer diaphragm kit for deep hole drilling
  • Ingersoll-Rand 2686634003 breaker nitrogen sealing
  • Quarry production rigs running multi-shift percussion
  • Tunneling jumbos and foundation drill maintenance
Specs
Technical Specifications
Part Number86634003
Cross ReferenceIngersoll-Rand 2686634003; also listed under Atlas Copco / Epiroc systems
MaterialSynthetic rubber compound reinforced for cyclic pressure and heat
Compatible ModelsMontabert HC109, HC120, HC150; Ingersoll-Rand equivalents
FunctionNitrogen sealing membrane inside hammer accumulator
PackageSingle diaphragm; full kit with O-rings and screws available on request
Details
Detailed Description

The Montabert Shaft 86220209 is a precision component designed for Montabert drilling equipment. Manufactured from high-quality materials, it ensures reliable performance, accurate fitment, and long service life under heavy-duty conditions. Share your machine model to confirm compatibility and receive a quotation.

  • New Genuine Ingersoll-Rand Diaphragm - 86634003
  • Atlas Copco / Epiroc 2686634003
Ref No.Part No.Description
1086374030LP BODY
2086385119HP BODY
3086264678HELICOIL THREAD
4086374055COVER
5086376191O RING
6086634003DIAPHRAGM KIT
7086241403BS RING
8086265048INFLATING SCREW
9086223419PIN
10086265071O RING
11086326493O RING
12086570447TIGHT SEAL
13086313228SOCKET HEAD SCREW
14086323672CYLINDER
15086333697DISTRIBUTOR
16086333713THRUST PISTON CYL. E
17086578580STRIKE PISTON
18086324738COVER
21086250867SOCKET HEAD SCREW
22086333267PLUG
23086281979O RING
24086223914DISTRIBUTION COVER
25086220944VALVE
26086220951PUSH ROD
27086220969LINING

FAQ
FAQ
Is this diaphragm identical to the factory part?
We stock both OEM-sourced and in-house manufactured units. The in-house ones are built to the same drawings and tested for burst pressure and cycle life. Tell us which you prefer when you send the RFQ, and we'll quote accordingly.
Will it fit my HC120 without machining?
Yes. It's a direct bolt-in for HC109, HC120, and HC150. But we still ask for your machine serial number—Montabert made small running changes over the years, and we'd rather double-check for free than have you wait on a return.
How soon can I get one to Western Australia?
Most orders ship within 48 hours from stock. DHL Express to Perth, Kalgoorlie, or Brisbane usually lands in 4–6 business days. If you're down waiting on this part, mention it—we can often push same-day dispatch.
What are the signs the diaphragm is going bad?
Hammer hits softer, feels irregular, or you hear a different pitch. Sometimes you'll see nitrogen bubbles in the grease or oil. If blow count drops and you've already checked the feed pressure and rotation, it's worth pulling the accumulator cap.
Can I use this in an Ingersoll-Rand hammer labeled 2686634003?
Absolutely. Same dimensions, same bolt pattern. A lot of our mining customers cross-shop both part numbers because the hammer internals are shared across those models.
What warranty do you offer?
Standard is 6 months against material or manufacturing defects. For fleet orders, we can extend to 12 months. Warranty covers the part, not labor—but we rarely see failures when installed to Montabert's torque specs.
Stock
Check Stock & Get a Quote
Tell us your machine model and how many you need. We'll get you a landed price with shipping—usually same day.
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