Komatsu JMHB470V-2 Attachment Shop Manual (SEN06983-05)

The Komatsu JMHB470V-2 Attachment is a heavy hydraulic breaker used on excavators for rock breaking, demolition, and tough trench work. People who reach for the Komatsu JMHB470V-2 Attachment Shop Manual (SEN06983-05) are usually shop mechanics, field techs, or serious owner-operators who actually have to pull this hammer apart and put it back together correctly. They’re trying to diagnose weak impact, oil leaks, abnormal noise, or mounting problems and then carry out proper workshop-level repairs, not just quick adjustments. This kind of manual usually assumes you’re comfortable with basic hydraulic and mechanical systems.

What this manual helps you do

• Trace hydraulic issues in the breaker circuit so you can decide if the fault is in the hammer, the carrier, or the plumbing.
• Check wear parts like bushings, tools, and seals and decide whether to replace, recondition, or keep running them.
• Follow disassembly and reassembly sequences for the JMHB470V-2 so you don’t damage internal components or mix up parts.
• Diagnose unusual noise, vibration, or loss of impact energy using symptom-based inspection steps and test points.
• Handle mounting, removal, and alignment procedures between the attachment and carrier to avoid side-loading and premature wear.

Who this is for

This shop manual is aimed at field technicians, dealership or independent shop mechanics, and advanced trainees learning how to rebuild hydraulic breakers. If you just want operating tips or daily greasing and inspection, you’d be better off with the operation and maintenance manual instead of SEN06983-05.

FAQ

Q: Is this a PDF I can search and print for the shop?

A: Yes, this is a digital shop manual in PDF format that you can search on-screen and print specific pages for use at the bench.

Q: Does it go deep enough for full teardown and rebuild?

A: The Komatsu JMHB470V-2 Attachment Shop Manual walks through diagnostic procedures, disassembly sequences, and reference torque tables used during workshop-level repairs.

Q: How do I know it matches my exact JMHB470V-2 hammer?

A: The manual is identified as SEN06983-05; you should match that book number against your machine documentation or dealer info to confirm coverage for your specific variant.

Bottom line: If you’re repairing or rebuilding a Komatsu JMHB470V-2 Attachment and you work at a bench or in the field, this is more or less the right manual. If you only need basic operation or service intervals, you should keep looking for the operation/maintenance guide instead.

Table of Contents:

• Table of content
• SAFETY EN
• ISO Symbols
• Tooling
• Seal kit
• Dismantling
• Parts inspection
• Repairing
• Mounting
• Energy chamber
• Pressurization
• Long term storage
• Lubricating pump

Komatsu