Righto Ian - come to think of it, I found oval elongation in the fixing bolts there ! I reamed it (carefully, minimally) back to round and fitted a thin shim around the bolt shaft until all was tight again.🙂
On Tue, Jul 1, 2025 at 5:00 PM Ian Williams <[email protected]> wrote: > Yep I’m thinking about that. Also the cable steering bracket on top of the > tailwheel shaft maybe loose. > Sent from my iPad > > On 1 Jul 2025, at 21:46, Kristin Nowell <[email protected]> wrote: > >  > The tailwheel shimmy might also be a loosening in the bearing set that > holds the tailwheel fork - quite a lot of pieces to the assembly ! > > On Tue, Jul 1, 2025 at 4:42 PM Kristin Nowell <[email protected]> > wrote: > >> If your brakes still work it might be the reservoir or associated tubing >> leaking (?) The tubes stiffen over time, and the reservoir becomes brittle. >> >> On Tue, Jul 1, 2025 at 10:12 AM Ric Sutton <[email protected]> >> wrote: >> >>> Hi Gyozo. >>> Depending on where its leaking from it may be easily repairable. >>> Mine (dimona mk1) was leaking from the park brake valve portion of the >>> master cylinder. if memory serves me correctly I replaced the o-rings on >>> that valve and it was good to go. >>> cheers >>> ric >>> ------------------------------ >>> *From:* [email protected] <[email protected]> on >>> behalf of Laurie Hoffman via dog <[email protected]> >>> *Sent:* Tuesday, July 1, 2025 2:13 AM >>> *To:* [email protected] <[email protected]> >>> *Subject:* Re: [DOG mailing list] Master brake cylinder >>> >>> We found that tightening the steering cables rectified bad shimmy on the >>> straight shaft tail wheel. >>> Although the suspension tailwheel with the rubber blocks still shimmied >>> badly after that >>> I suspect it might be related to softening (or hardening?) of the blocks >>> over time that may be involved. >>> With the super Cub we found keeping it highly inflated helped a lot on >>> sealed surfaces which would have been due to less tread surface making >>> contact with the bitumen I think. >>> The other possibility is a slightly bent vertical shaft due heavy >>> landings and thus throwing the geo.etry out. There is a hell of a lot of >>> load on the tailwheel on landing particularly on rough ground. >>> Laurie >>> >>> Yahoo Mail: Search, Organize, Conquer >>> <https://mail.onelink.me/107872968?pid=nativeplacement&c=US_Acquisition_YMktg_315_SearchOrgConquer_EmailSignature&af_sub1=Acquisition&af_sub2=US_YMktg&af_sub3=&af_sub4=100002039&af_sub5=C01_Email_Static_&af_ios_store_cpp=0c38e4b0-a27e-40f9-a211-f4e2de32ab91&af_android_url=https://play.google.com/store/apps/details?id=com.yahoo.mobile.client.android.mail&listing=search_organize_conquer> >>> >>> On Tue, Jul 1, 2025 at 8:15 AM, Ian Mc Phee >>> <[email protected]> wrote: >>> Over inflation can start it - we have rubber shock version. >>> >>> Ian McPhee >>> +61 428847642 >>> >>> On Mon, 30 June 2025, 20:03 Ian Williams, <[email protected]> wrote: >>> >>> Hi all, >>> I have just had an interesting flight in a Dimona at Swansea in the UK. >>> … operating on a sealed strip >>> Had real bad tailwheel shimmying on landing >>> The tailwheel asst is one of those rubber sprung types >>> Any ideas the best approach to fix the prob >>> >>> Ian W >>> In uk but normally New Zealand >>> Sent from my iPad >>> >>> On 21 Jul 2022, at 13:02, pattoninfl.aol.com via dog < >>> [email protected]> wrote: >>> >>>  >>> Gyozo, >>> >>> It's a master cylinder used in Piper Cherokees. I replaced mine about 1 >>> year ago. I bought mine from a aircraft junkyard here in the US. >>> >>> Regards, >>> Bruce Patton >>> >>> >>> -----Original Message----- >>> From: Győző Horváth <[email protected]> >>> To: [email protected] >>> Sent: Thu, Jul 21, 2022 2:55 am >>> Subject: [DOG mailing list] Master brake cylinder >>> >>> Hi, >>> >>> It seems that there is a leakage at master brake cylinder of my Dimona. >>> The belly is full with brake fluid, however the brake still works well. Do >>> you have experience with it? Is it a Cessna cylinder? What kind of parts >>> should be ordered for repair and do you know the specifications and source? >>> >>> With many thanks and best regards >>> Gyozo >>> --------------------------------------------------------------------- >>> You are subscribed to the Dimona Owners Group mailing list. >>> This list is archived in public. http://waikeriegliding.com/dog/ >>> To unsubscribe, send email to: [email protected] >>> >>>
