Question about Hammering
Hello! Motor works OK but chisel seems to jam and stop moving. Motor continues running. No odd noises. Chisel easily removed and refitted. Have taken whole assembly apart and all looks OK. Wondered whether it might be worn piston O rings reducing pressure causing it to stall. Machine is ex-hire and pretty old. Cheers Ron
I worked at a tool rental /hire while going to college and repaired many of these breakers. For this tool to work most efficiently, we would store them in their stand upright in a heated area (during winter). This tool requires special grease sold as a service kit which includes orings and bolts for retainer area. Remove large piston attached to connecting rod and remove inner striker (fits inside main piston) this striker is the source of problems. Clean inner cylinder and striker and lube with bosch grease, not too much. If you lay the hammer down or store with bit side up this striker will migrate to uppermost part of the main piston and be vacuum locked thus not hammer. Also remove and lube the impact bolt and look for damage. If chipped or cracked this part must be replaced. Parts/list are available at www.toolpartsdirect.com. enjoy
Posted on Dec 08, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 20, 2012 | Bosch 1 916 SDS Max Rotary Hammer Drill...
Dec 12, 2011 | Hammering
Apr 06, 2011 | Bosch SDS-plus BULLDOG Xtreme Rotary...
Mar 26, 2011 | Bosch Brute Breaker Hammer 11304
Mar 14, 2011 | Bosch Brute Breaker Hammer 11304
Oct 17, 2010 | Bosch 11304K Brute Breaker Hammer
Sep 30, 2009 | Bosch Brute Breaker Hammer 11304
Jun 05, 2009 | Makita Hr4510c Avt Sds Rotary Breaker...
671 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: