Lewmar Ocean Hatches with shades/insect screens
Feb 26, 2018 21:09:20 GMT
Post by pagoda54 on Feb 26, 2018 21:09:20 GMT
We have a lot of these on our 42i.
The forepeak hatch shade roller finally failed to roll back at the end of last season ( of course the insect screen still works!). Looking for spares I discovered there are none available.
There are NEW Lewmar hatch shades about to come out, but not remotely inexpensive.
I took the hatch shade frame home and dis-assembled the offending roller. ( a few cross head screws!).
The ends of the roller have nylon plugs/pins which run in small nylon brackets at each end (1 screw each). The alloy tube has an ID of about 10mm- with an internal seam line which stops the tube end parts from rotating. One end is a simple plug & pin .
The other has the spring which does the re-rolling.
The spring is round an internal 4mm SS rod, which keys through the plug into the end bracket with a flat. One end of the spring locates in a groove in the end plug, opposite the seam line.The far end of the spring is retained by a split in the 4mm rod.
So one end is "fixed" via the rod to the outside bracket, and the other to inside of the roller tube. The remains of the original broken spring fell out in about a dozen fragments.
I looked hard in Ebay for comparable tension springs and found some at 200mm*8.6mm* 0.8mm wire. The loops and length needed slight modification/straightening , but the spring fitted OK.
Before re-assembling I wound in various amounts of pre-load- to find what would retract the shade. Popped both end brackets and the roller shade back in - with the tiny screws.
We're back in business again!
A little careful manipulation and <£10 fix
Photos attached :
www.23hq.com/pagoda54/photo/40992439/original
The plain end of the roller, showing the bracket secured to the hatch
The plain end - a hollow plug - with a slot that keys into the seam on the tube ID
www.23hq.com/pagoda54/photo/40992448/original
The (new) spring assembly at the other end- comes out with the bracket on the end of the rod.
www.23hq.com/pagoda54/photo/40992455/original
The inside end of the spring goes through the split end of the rod (snip off the wire end so it does not foul the inner seam on the tube -or it won't rotate)
www.23hq.com/pagoda54/photo/40992462/original
The plug at the bracket end of the spring has a groove for the end of the spring wire end opposite the groove for the tube seam.
(apology for focus)
www.23hq.com/pagoda54/photo/40992465/original
The flat end of the rod goes into a flat slot on the nylon bracket to stop rotation. There was the remains of a flat spring in there, but I wasn't happy with the security, so I put a 2mm split pin through the nylon and the rod flat to retain it. No chance of slipping out now.! A roll pin would have been nice, but I couldn't find any of the correct size in my toolbox.
www.23hq.com/pagoda54/photo/40992470/original
The forepeak hatch shade roller finally failed to roll back at the end of last season ( of course the insect screen still works!). Looking for spares I discovered there are none available.
There are NEW Lewmar hatch shades about to come out, but not remotely inexpensive.
I took the hatch shade frame home and dis-assembled the offending roller. ( a few cross head screws!).
The ends of the roller have nylon plugs/pins which run in small nylon brackets at each end (1 screw each). The alloy tube has an ID of about 10mm- with an internal seam line which stops the tube end parts from rotating. One end is a simple plug & pin .
The other has the spring which does the re-rolling.
The spring is round an internal 4mm SS rod, which keys through the plug into the end bracket with a flat. One end of the spring locates in a groove in the end plug, opposite the seam line.The far end of the spring is retained by a split in the 4mm rod.
So one end is "fixed" via the rod to the outside bracket, and the other to inside of the roller tube. The remains of the original broken spring fell out in about a dozen fragments.
I looked hard in Ebay for comparable tension springs and found some at 200mm*8.6mm* 0.8mm wire. The loops and length needed slight modification/straightening , but the spring fitted OK.
Before re-assembling I wound in various amounts of pre-load- to find what would retract the shade. Popped both end brackets and the roller shade back in - with the tiny screws.
We're back in business again!
A little careful manipulation and <£10 fix
Photos attached :
www.23hq.com/pagoda54/photo/40992439/original
The plain end of the roller, showing the bracket secured to the hatchThe plain end - a hollow plug - with a slot that keys into the seam on the tube ID
www.23hq.com/pagoda54/photo/40992448/original
The (new) spring assembly at the other end- comes out with the bracket on the end of the rod.
www.23hq.com/pagoda54/photo/40992455/original
The inside end of the spring goes through the split end of the rod (snip off the wire end so it does not foul the inner seam on the tube -or it won't rotate)
www.23hq.com/pagoda54/photo/40992462/original
The plug at the bracket end of the spring has a groove for the end of the spring wire end opposite the groove for the tube seam.
(apology for focus)
www.23hq.com/pagoda54/photo/40992465/original
The flat end of the rod goes into a flat slot on the nylon bracket to stop rotation. There was the remains of a flat spring in there, but I wasn't happy with the security, so I put a 2mm split pin through the nylon and the rod flat to retain it. No chance of slipping out now.! A roll pin would have been nice, but I couldn't find any of the correct size in my toolbox.
www.23hq.com/pagoda54/photo/40992470/original
