PN: 333/A9900-3.

Language: English.

Total Pages: 997

SKU: 333/A9900-3 Category: Tag:

Share this product



This document details the relevant use and maintenance procedures for the JCB LARGE HYDRAULIC BREAKER (Hammermaster). The safety information included is directly relevant to operation and maintenance of the Hammermaster. General safety information, and that relevant to the carrier machine is not included. For details about safe operation of the carrier machine, see the relevant documents.

Important: Do not attempt to install, operate or maintain any attachment until you have read and understood all relevant operator documentation for both the attachment, and the carrier machine. Pay particular attention to safety information. You must observe all relevant laws and regulations.

The manufacturer’s policy is one of continuous improvement. The right to change the specification of the machine without notice is reserved. No responsibility will be accepted for discrepancies which may occur between specifications of the machine and the descriptions contained in this publication.


1 Make sure that the storage area is dry.

2 Remove the tool.

3 Drain the gas from the low pressure accumulator using the gas charging kit, leave the charging valve open.

4 Liberally cost the lower end of the piston, the tool(s) and the bushings with grease.

5 Remove the caps from the capped hoses or connect a mating QRC, if QRCs are installed. Be prepare to collect any oil that is spilled.

6 Push the piston into the housing.

7 Put caps on the hoses to prevent ingress of dirt and moisture, if QRCs are not installed.

8 Close the low pressure accumulator charging valve.

9 Re-install the plug.

Breaking – Do’s and Don’ts

To ensure long life the JCB LARGE HYDRAULIC BREAKER requires correct set up and size the hammer matched for the job. “If a small breaker is used on a job that requires a much larger breaker, its life will be shortened. by forcing the breaker to do more than it was designed to do, “A large breaker can do a smaller job or break smaller material however the operator may not have the control.” The hydraulic systems must also be set to match the particular hammer used. Hammers are designed to run within a defined range of hydraulic pressures and flows.

Operating out side these limits will either shorten its life or result in poor performance

Point to Remember

– On first installation – commission

– Lubricate tool and tool retainer pins before installation.Use hammer grease not universal greaseMonitor grease mark on tool.Monitor grease usage.Manual greasing with tool fully pushed in.When removing ensure ports are capped.Reset relief valve if a higher pressure attachment is installed.Change carrier machine oil twice as regular.Change hammer return filter regularyStand clear of the tool when gas chargingEnsure the return line is open when gas charging. Always use a gas charging kit with a regulator suitable for the job. On double acting machines understand the action of both ARV’s Get trained.

Find more manuals for JCB Industrial machines here.

Link to JCB Construction website is here.


There are no reviews yet.

Be the first to review “JCB LARGE HYDRAULIC BREAKER (HM Series)”

Your email address will not be published. Required fields are marked *