If pos 22 980-707 is broken it does not function , also if pos 35 is broken 932-815 then also the motor drives but no hammer , also if pos 8 is not moving 987-705 because the lubrication is not good anymore if started leaking and if that happens the piece and all your o-rings will be worn by heating up because thefront ofyour hammer must be air tight all the way , a demolition hammer is made for lasting long hours but leaking although it is still so small its in a few hours inside becomes to hot for the seals o rings and lubrication and then there are Discussions for to get a Service Kit (H 45Sb) - ( 987-712 ) the hammer is to old for economic repair by others some parts are not anymore available, i know it where good hammers , but marketing technical changes in weight, more
more speed and less vibrations and for 7 years max parts in stock (not sometimes 15 years as before) and over that time its all discontinued demolition hammers are averaged of use of 6 years by normal usage.
Lubrication is not the problem but in front its must airtight otherwise
is bad for your arms and shoulders because its build for timing when its airtight.
Hitachi H45SB Hammer Parts
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