I have dismantled the gearbox housing as it had seased with dust in the grease , i have cleaned and freed the clogged cogs , re greased all the internals but i am having difficulty getting the pin on the selector switch to locate into its metal spring type guide , this is stopping the case going back fully and the switch will not select the 3 settings . is there a strateagic way to locate the pin . hope u can help as it is very frustrating ? many thanks.
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Re: How can i fix my bosch gbh 4 dfe?
Yes, there is a trick to it. Make sure the pin is placed inside the little weird looking spring inside the hole. Press in the selector knob at about the five oclock position and rotate counter clockwise. Lemme know if you need further assistance. Please rate me
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No there isn't, the oil that's leaking out is the liquid that makes up part of the grease that's in your gearbox. Grease is solids and oil combined, over time the mixture breaks down and releases the oil. A proper fix if you wish to do it is to dismantle the machine, clean out the old grease and replace it with new. The oil that's leaking is harmless as it is special food grade grease in there. If you choose to replace the grease you should be buying and using KitchenAid food grade grease. A KitchenAid service agent will have the grease and be able to do the job for you.
Take a little screwdriver under the knop and jump him out BUT be carefull there is a little metal pin inside the knob that can be loose and easy lost .
And important Jump out the knop (BEFORE) you have removed the 4 screws of the black house.
It sounds like the gearbox oil is getting low. The GBH5 uses oil in the gearbox, not a grease - the grease is used for assembly only. The correct type is a PG-150 (fully synthetic gear oil). Unable to find it in small quantities, I now use PAG150 oil for automotive a/c systems, it's available in small bottles. As for quantity, no-one seems to know... I just fill to cover the big bottom gears.
Remove the chrome drip ring, knock out the planetary pin and remove the planetary. Clean everything you have taken off with a rag or tissue, pop a small amount of grease on the teeth in the underside of the motor housing and reassemble. That's an easy fix that will last a reasonable time. The problem is the grease in the gearbox is getting old and breaking down. It is food grade grease so what leaks is harmless to you. Eventually you will need to replace the gearbox grease but that's an involved dirty job.
Go to Boschtools.com and type in your number or go to tools and rotary hammers and highlight your hammer, it will take you to another page and then you can look at a breakdown which is very specific on the direction and placement of the selector. The shift fork must be in the forward position and you can eyeball it with the post on the selector after you have it in position to lock it in. Remember you have to depress the plunger on the selector to reinstall it. Let me know if you still are having problems.