eyschulman
Guru
- Joined
- Apr 1, 2014
- Messages
- 1,288
Has anybody cleaned and greased a Nick Jackson davit brake? There are no instructions other than to clean and grease and no pictures etc. Talking to the co. rep gets no joy.
From the company site and that is all I could find. It seems odd in this day and age that there is nothing else on-line or to download, but if there is I sure can't find it. All I can remember seeing in my on-board papers is a PO's invoice for the install but I'll re-check the boat in the next day or so to see if I have a manual for the davit.Low Profiles- upper bearing is a "timkin" roller bearing, and needs to be greased every two years. the lower bearing is a compression bearing that you should lube every year w/ a light teflon grease or spray.
Call Nick and ask him.............
I... will try one more call to NJ. If I learn anything I will take pictures and post.
I did find a manual for my NJ Low Profile davit. It's from 1994 (see parts prices on page 10). Not really much help for grease maintenance though it mentions checking the roller bearing and bearing strip for grease every 3 years. I think that's the horizontal rotation bearing(?). Not sure how you check that but mine seems to swing just fine after 20 years, so...
For what it's worth, I have scanned and posted the short manual.
There was also an owner's manual for Rule Winches in the folder. I didn't include it in the pdf. It's kind of a generic manual for automotive winches but as it's a similar vintage to the NJ manual, I suspect that is what is inside my davit. One thing of note in that manual is this..."Your Rule winch is permanently lubricated and sealed"...so no maintenance there.
Our Nick Jackson davit worked flawlessly for the 15 years we had our Krogen 42. I did experience some sticking of the shieve wheel at the end of the boom. If I remember correctly Nick reminded me that I was not to tighten the through bolt too much as it would compress the side plates and prevent free rotation of the grooved pulley. The bolt had a captive nut thus preventing loosening. It's easy to over tighten and compress the end plates as stainless steel is considerably softer that carbon steel.