Ah Richard, in my previous posts on fitting these BRB's I have described how to prevent that misalignment occurring. Just to make a short cut here for anyone reading and wondering how, here's what you do.
The crosshead is a fixed item which means the pin is fixed also within this structure, so sliding pin used to describe the suspension system is not really correct, rather it's a sliding hub assembly. When you have the car in a position ready to start fixing the BR bars the very first thing to do is place a jack under the bottom bolt of the pin (below the rebound spring) Bring it into contact and gently jack it up until you can just see slight movement at the cross-head. You are not trying to jack the car up rather just adequately tension the pin against It's top mount. This will maintain the pin in the correct position whilst you loosen and remove the oiler bolt. Here, once I have loosened the oiler bolt half a dozen turns I then want to check that it is removeable by hand. this achieves two things firstly it shows that the pin is being held in a correct position and secondly that there is no damage or distortion to the cross-head. If the cross-head is bent its possible that the movement when an oiler bolt is removed could well cause a misalignment problem that will be difficult at best as a home mechanic to rectify. If all is good remove the the oiler bolt, fit the BRB and refit the oiler bolt at least half way. Now you can take care of the fixing at the chassis end. When satisfied with both fixings tighten them up starting with the oiler bolt. initially just sneck it up, then tighten the chassis end fully, finally return to the oiler bolt, tighten by hand only using a standard spanner. CAUTION Don't be tempted to lean on this with socket tools and breaker bars! I was once given a torque setting for this bolt but am not sure how true or from where it originated so I won't post it here however I have had a chat with Arwyn whose knowledge is phenomenal Morgan wise and he says there is actually no torque setting stated in any documentation and he suggests standard spanner by hand. The works may have a setting but probably only for speed of installation. Arwyn tells me he has had cars in with broken oiler bolts so probably overtightened and then shock fractured.
