Komatsu JMHB170H-1 Attachment Shop Manual (SEN06675-07)

This Komatsu JMHB170H-1 Attachment is a hydraulic breaker you’ll see on mid-size excavators doing concrete, rock, and demolition work. The Komatsu JMHB170H-1 Attachment Shop Manual (SEN06675-07) is what shops use when the hammer starts losing power, running hot, or breaking parts too often. People usually grab this kind of manual when they’re past “basic maintenance” and need proper teardown, inspection, and reassembly guidance.

What this manual helps you do

• Trace hydraulic issues in the breaker and confirm whether the fault is in the attachment or the carrier machine.
• Check wear limits on internal components so you can decide what to reuse and what must be replaced.
• Follow disassembly and reassembly sequences so you don’t crack housings, pinch seals, or mis-stack internal parts.
• Diagnose impact problems like weak blows, irregular striking, or abnormal noise using step-by-step troubleshooting logic.
• Handle seal and bushing replacement with the right order of operations and correct orientation of parts.

The Shop Manual for Komatsu JMHB170H-1 Attachment walks through diagnostic procedures, disassembly sequences, and workshop-level repair steps for this breaker. The Komatsu JMHB170H-1 Attachment Shop Manual (SEN06675-07) usually includes hydraulic checks, inspection criteria, and reassembly instructions aimed at a properly equipped workshop.

Who this is for

This is aimed at field techs, shop mechanics, and rebuilders who actually tear the hammer down on a bench. If you’re just operating the breaker or only doing daily greasing and visual checks, you want the operation/maintenance manual instead, not this shop manual.

FAQ

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

A: Yes, it’s a PDF file you can search on-screen and print pages for use in the shop.

Q: Is this enough to rebuild the hammer, or do I need something else?

A: For mechanical and hydraulic repair of the JMHB170H-1 attachment, this shop manual is what most shops use; you’ll still need parts info from a parts book.

Q: How do I know if it matches my exact hammer variant?

A: Check your attachment’s model tag and make sure it says JMHB170H-1; if it does, this SEN06675-07 manual is the one you want.

Bottom line: If you’re opening the hammer up, chasing performance faults, or doing full rebuilds, grab this. If you only need operating tips or service intervals, keep looking for the operator or O&M manual instead.

Table of Contents:

• Foreword
• ISO symbols
• Seals kit
• Dismantling
• Inspection
• Repairing
• Assembling
• Energy chamber
• Tooling
• Long term storage
• Presurization
• Grease pump

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