Removing bonnet tricks

It depends a lot on the size of the slide hammer. If you can fit a impact gun in that area, as suggested by Jim, you can get a small slide hammer in there, as I do on a regular basis when removing a stuck, original component.

1 Like

I love how you refer to it as a scheme. :smiling_imp:

1 Like

I think I can hear a thwack coming with a big hammer or maybe he’ll be delicate and use a bearing puller😀

F**k that!

I’m heading for the oxy-acetylene kit.


1 Like

Fire is so primal :troll: every man likes it :grinning:

1 Like

Hello Paul,
Another Scheme I use if the slide hammer doesn’t move it with the first few tries and given that I’ve already tapped the start of the Top Hat Pivot bore, is with the following device.

The following picture shows the shank of a 3/8" UNF bolt that has the end drilled and tapped to take a 5mm or 3/16" UNF Socket Head Bolt. The Socket Head Bolt is simply to provide a method of screwing the device into the Threaded Hole in the end of the horizontal bar once the securing bolt for the Top Hat Pivot Bush has been removed.

The following picture shows the device in place. The Top Hat Bush has been removed for clarity, but obviously, the Top Hat Pivot Bush would still be in place when assembling the Threaded Shaft.

The following picture shows the Top Hat Pivot Bush tapped to accept a 7/16" UNF Bolt.

The following picture shows the Threaded Shaft in place inside the Top Hat Pivot Bush, ready to accept the 7/16" UNF Bolt

The following picture shows the Threaded Shaft being assembled using an Allan Key. The Allan Key is also used, when required, through an axial hole in the 7/16" UNF Bolt to stop the Threaded Shaft from turning, should that occur when winding the 7/16" UNF Bolt in.

The last picture shows the 7/16" UNF Bolt in place, with its inner end hard up against the face of the Socket Head Bolt. Extraction of the Top Hat Pivot Bush is accomplished by winding the 7/16" bolt in and therefore, jack the Top Hat Bush out.




I had this problem and Ole Würtz helped me out in a 2015 post. Sorry, I can’t find the pictures but once you get the bush tapped to this point:


you find a deep dish socket large enough to clear the bush flange but still rest on the bonnet frame. Then stack several washers on top of the socket, run the 7/16" bolt through the washers-socket and thread into the bush. As you tighten the bolt, with the head of the bolt drawn to the washers, the bush will be drawn out of its prison by the threads. Go slow. Give the pressure time to work. If needed, remove the bolt and add more washers then repeat in order to get enough “throw” to draw the bush completely out.

No banging, heating, welding or cursing required. Good luck!