Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
this model # XXXXX XXXXX up a white Westinghouse washer. can you recheck and see if theres more to the number?
No - can see the bolt but the instructions I had said that the agitator just pulled off - didn't want to go undoing random bolts lol. I'll go and locate a socket set and undo it. Will get back to you shortly.
Will they do show a filter but not all these machines have them, here are all the diagrams for your machine, that's about as good as I can do and they do show a filter if you look in the water system diagrams,click this blue link.
http://www.searspartsdirect.com/partsdirect/part-model/Whirlpool-Parts/All-Products-Parts/Model-3LBR6132EQ1/1198/0153000?pathTaken= hope this helps, thanks, Bryan
Thank you for your help - will see how the next wash goes but think I have done all I can now.