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Posted: 3/25/2021 10:40:49 AM EDT
I have a SRPD77 "Avocado" that stops and you can hear the winding weight scraping the side of the case...It's got a clear cover on the back and I can see in: nothing looks amiss, and you can swish it around to wind it and it'll work for a little while, then quit.
It's not economically feasible to send it to Seiko in NJ (They jacked the price on their web site for overhauling the Monster I sent in) I really don't know a lot about all the mods, hacks, and people that do the work, only that I don't want to spend two hundred dollars sending it Mahwah. 
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Posted: 3/25/2021 12:23:46 PM EDT
[#1]
A replacement movement is cheap and easy to install. I probably could do it for you for the cost of parts. Let me do some digging, I will post back later.
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Posted: 3/25/2021 12:27:29 PM EDT
[#2]
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Posted: 3/25/2021 8:15:11 PM EDT
[#3]
Yeah that shouldn’t be to hard or expensive to drop a brand new movement into.
I would probably attempt it myself first then take Spartacus up on his offer if I fail 
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Posted: 3/25/2021 8:56:42 PM EDT
[#4]
Your best bet would be to replace the movement with a regulated Seiko NH36A movement from Namoki. It's the unbranded name under which Seiko sells the 4R36.
$68 it is my understanding that because you're just swapping one 4R36 movement for another, you wouldn't need a new crown/stem or caseback. You could just use the same crown/stem and caseback. |
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Posted: 3/25/2021 9:03:32 PM EDT
[#5]
Quoted: I have a SRPD77 "Avocado" that stops and you can hear the winding weight scraping the side of the case...It's got a clear cover on the back and I can see in: nothing looks amiss, and you can swish it around to wind it and it'll work for a little while, then quit. OP is that an aftermarket clear caseback? The 4R36 (aka NH36) movement has a different spacer around it from the 7s26 movement (which is in SKX007s) and requires a different caseback. I'm curious if your watch has the aftermarket caseback for the 7s26 movement and thus is hindering the 4R36/NH36 winding weight. 
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Posted: 3/25/2021 10:00:03 PM EDT
[#6]
Quote HistoryQuoted: Your best bet would be to replace the movement with a regulated Seiko NH36A movement from Namoki. It's the unbranded name under which Seiko sells the 4R36. $68 it is my understanding that because you're just swapping one 4R36 movement for another, you wouldn't need a new crown/stem or caseback. You could just use the same crown/stem and caseback. Sorry for being late getting back to this thread: The one pictured in the Link is the same one. The back cover is see-thru and does look like the one pictured... it's a 4R36-07G0 (movement Japan) sn# 116272 24 Jewels I have no watch tools so I expect it would have to go off for repairs....not sure what kind of "mods" could be done to it. Currently I'm wearing another Prospex 4R36-05H0 Air Diver Special Edition...it picks up about three minutes a week, while the Monster was loosing 3 a week. |
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Posted: 3/25/2021 10:01:43 PM EDT
[#7]
Quote HistoryQuoted: OP is that an aftermarket clear caseback? The 4R36 (aka NH36) movement has a different spacer around it from the 7s26 movement (which is in SKX007s) and requires a different caseback. I'm curious if your watch has the aftermarket caseback for the 7s26 movement and thus is hindering the 4R36/NH36 winding weight. https://www.ar15.com/media/mediaFiles/31480/Screen_Shot_2021-03-25_at_9_01_31_PM-1879936.png I don't think the back cover is aftermarket because that's where I read all the information and serial number. Does not have a screw-down crown, where as the other prospex (save the oceans Blue?) does. |
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Posted: 3/25/2021 10:09:10 PM EDT
[#8]
Quote HistoryQuoted: Currently I'm wearing another Prospex 4R36-05H0 Air Diver Special Edition...it picks up about three minutes a week, while the Monster was loosing 3 a week. My SKX007 was even worse, varied +/- over five minutes a week. I like the Seiko watches, but because of the issues with their stock movements I build my own Seikos with regulated NH36s from Namokimods. MUCH more accurate. |
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Posted: 3/25/2021 10:15:24 PM EDT
[#9]
Quote HistoryQuoted: I don't think the back cover is aftermarket because that's where I read all the information and serial number. Does not have a screw-down crown, where as the other prospex (save the oceans Blue?) does. Quote HistoryQuoted: Quoted: OP is that an aftermarket clear caseback? The 4R36 (aka NH36) movement has a different spacer around it from the 7s26 movement (which is in SKX007s) and requires a different caseback. I'm curious if your watch has the aftermarket caseback for the 7s26 movement and thus is hindering the 4R36/NH36 winding weight. https://www.ar15.com/media/mediaFiles/31480/Screen_Shot_2021-03-25_at_9_01_31_PM-1879936.png I don't think the back cover is aftermarket because that's where I read all the information and serial number. Does not have a screw-down crown, where as the other prospex (save the oceans Blue?) does. I see from the link I posted that that model has a clear caseback. I'm not familiar with the SRPDs, I'm far more hands-on familiar with the SKX and somewhat book-familiar with the Turtles. I'd be happy to swap the movement for you, but it seems like there might be something else wrong with it that swapping the movement won't fix. |
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Posted: 3/25/2021 10:17:51 PM EDT
[#10]
FWIW: I was just looking it over and holding it vertically, you can lightly push-pull back and forth and see the weight shake, I surmise the bearing that carries the weight has failed or the screw that holds it all down is loose; either way I don't have a spanner, and its too tight for other tools.
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Posted: 3/25/2021 10:26:19 PM EDT
[#11]
Quote HistoryQuoted: I see from the link I posted that that model has a clear caseback. I'm not familiar with the SRPDs, I'm far more hands-on familiar with the SKX and somewhat book-familiar with the Turtles. I'd be happy to swap the movement for you, but it seems like there might be something else wrong with it that swapping the movement won't fix. I'm very novice on models and their variances....I've always like the Seiko Dive Watch and have had a few of them. SPRC71 is the Blue one I'm wearing Seiko 5 SPRC77 is the avocado The Monster is an old 7S26 and its a Tank. I really had no idea people bought parts and built their own watches. 
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Posted: 3/25/2021 10:46:41 PM EDT
[#12]
Quote HistoryQuoted: I really had no idea people bought parts and built their own watches. Do some reading here: https://nextseiko.com/blogs/watch-modding-tips-tricks-resources/how-to-starter-guide-to-seiko-watch-modding I have a thread here in which I modded one SKX and built another from scratch. Next on my list is my first Turtle-based Doxa clone. I will do a new thread with step-by-step build pics 
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Posted: 3/26/2021 5:56:49 AM EDT
[#13]
Quote HistoryQuoted: Do some reading here: https://nextseiko.com/blogs/watch-modding-tips-tricks-resources/how-to-starter-guide-to-seiko-watch-modding I have a thread here in which I modded one SKX and built another from scratch. Next on my list is my first Turtle-based Doxa clone. I will do a new thread with step-by-step build pics https://www.ar15.com/media/mediaFiles/31480/SA0059-1873934.jpg WOW! |
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Posted: 3/28/2021 8:40:46 AM EDT
[#14]
Ive got an older skx007 that needs some love. It doesn't keep good time anymore even after Ive tried regulating it, crystal has a lot of damage from welding and I never liked the stock bezel.
Using the links above and a few youtube videos Im pretty sure I can get this apart and back together working better than it does now so I ordered a regulated movement, new domed sapphire crystal, bezel and bezel insert. Any info on a reasonably priced crystal press and hand press tolls would be greatly appreciated. Id been wanting to do this for a while so thanks for pushing me over the edge @spartacus2002. |
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Posted: 3/28/2021 9:24:13 AM EDT
[#15]
cjk,
here's another modding instructions link https://luciusatelier.com/blogs/news/tutorial-how-to-modify-your-seiko-watch-dial-and-hands Here's the kit I use: Watch Repair Kit with crystal press However, I don't use the included bezel removal tool because it sucks. I use this one instead (yes it's worth the $): watch bezel removal tool Here's the movement holder I use when I install the dial and hands: movement holder Here are Seiko parts shops: https://www.namokimods.com https://ajuicet.com https://komoworks.com https://www.dagazwatch.com/apps/webstore/ https://www.theyobokies.com https://usa.crystaltimes.net/ https://www.longislandwatch.com/Watch_Mod_Parts_s/1997.htm https://one-second-closer.com/shop/category/seiko-skx-007-7s26-0020/ https://watch-modz.com/ https://www.dlwwatches.com/collections/hands/products/hands-mm https://lcbistore.com/ https://luciusatelier.com/collections/seiko-skx007-srpd-mod-parts https://modmodewatches.com |
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Posted: 3/29/2021 5:00:17 PM EDT
[#16]
Quote HistoryQuoted: WOW! Quote HistoryQuoted: Quoted: Do some reading here: https://nextseiko.com/blogs/watch-modding-tips-tricks-resources/how-to-starter-guide-to-seiko-watch-modding I have a thread here in which I modded one SKX and built another from scratch. Next on my list is my first Turtle-based Doxa clone. I will do a new thread with step-by-step build pics https://www.ar15.com/media/mediaFiles/31480/SA0059-1873934.jpg WOW! started my build thread here Time for another watch build |
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Posted: 3/29/2021 5:00:45 PM EDT
[#17]
Quote HistoryQuoted: Ive got an older skx007 that needs some love. It doesn't keep good time anymore even after Ive tried regulating it, crystal has a lot of damage from welding and I never liked the stock bezel. Using the links above and a few youtube videos Im pretty sure I can get this apart and back together working better than it does now so I ordered a regulated movement, new domed sapphire crystal, bezel and bezel insert. Any info on a reasonably priced crystal press and hand press tolls would be greatly appreciated. Id been wanting to do this for a while so thanks for pushing me over the edge @spartacus2002. if you get stuck, IM me, we'll trade phone numbers and I'll walk you thru it. |
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Posted: 3/29/2021 5:20:17 PM EDT
[#18]
Quote HistoryQuoted: if you get stuck, IM me, we'll trade phone numbers and I'll walk you thru it. Thanks for the offer. I will give it a try, but its nice to have someone willing to assist. Only thing that looks a bit difficult is re-installing the hands but we will see when the parts get here. Im thinking of trying to make the tools out of stuff I have laying around.
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Posted: 3/29/2021 5:25:20 PM EDT
[#19]
Quote HistoryQuoted: Thanks for the offer. I will give it a try, but its nice to have someone willing to assist. Only thing that looks a bit difficult is re-installing the hands but we will see when the parts get here. Im thinking of trying to make the tools out of stuff I have laying around. Quote HistoryQuoted: Quoted: if you get stuck, IM me, we'll trade phone numbers and I'll walk you thru it. Thanks for the offer. I will give it a try, but its nice to have someone willing to assist. Only thing that looks a bit difficult is re-installing the hands but we will see when the parts get here. Im thinking of trying to make the tools out of stuff I have laying around. get some Rodico putty (this stuff https://www.namokimods.com/collections/tools/products/bergeon-6033-rodico-cleaning-putty-watch-repair-tool), use it to hold the hour and minute hands while you press them on with the hand tools in the Amazon kit above. For the second hand, use a tiny amount of Rodico on the end of the hand tool to adhere it to the hand tool. The hour and minute hands have basically a press fit onto their cylinders. The second hand acts like a cap atop the tiny stud in the center of the cylinders. You'll want a loupe or some kind of magnification glasses. Or, if you're nearsighted, it may be easier to remove your glasses/contacts so you're able to focus up close with the naked eye. |
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Posted: 3/30/2021 7:14:00 AM EDT
[#20]
Quote HistoryQuoted: cjk, here's another modding instructions link https://luciusatelier.com/blogs/news/tutorial-how-to-modify-your-seiko-watch-dial-and-hands Here's the kit I use: Watch Repair Kit with crystal press However, I don't use the included bezel removal tool because it sucks. I use this one instead (yes it's worth the $): watch bezel removal tool Here's the movement holder I use when I install the dial and hands: movement holder Here are Seiko parts shops: https://www.namokimods.com https://ajuicet.com https://komoworks.com https://www.dagazwatch.com/apps/webstore/ https://www.theyobokies.com https://usa.crystaltimes.net/ https://www.longislandwatch.com/Watch_Mod_Parts_s/1997.htm https://one-second-closer.com/shop/category/seiko-skx-007-7s26-0020/ https://watch-modz.com/ https://www.dlwwatches.com/collections/hands/products/hands-mm https://lcbistore.com/ https://luciusatelier.com/collections/seiko-skx007-srpd-mod-parts https://modmodewatches.com The one tool I didn't see (maybe it doesn't look like I think it should) is the spanner to unscrew the back cover. |
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Posted: 3/30/2021 7:17:14 AM EDT
[#21]
Quote HistoryQuoted: The one tool I didn't see (maybe it doesn't look like I think it should) is the spanner to unscrew the back cover. it's there. Pic below. the round clear box below the spanner contains the things you screw into the three points to match the notches on your caseback. 
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Posted: 3/30/2021 7:19:01 AM EDT
[#22]
Quote HistoryQuoted: Ive got an older skx007 that needs some love. It doesn't keep good time anymore even after Ive tried regulating it, crystal has a lot of damage from welding and I never liked the stock bezel. Using the links above and a few youtube videos Im pretty sure I can get this apart and back together working better than it does now so I ordered a regulated movement, new domed sapphire crystal, bezel and bezel insert. Any info on a reasonably priced crystal press and hand press tolls would be greatly appreciated. Id been wanting to do this for a while so thanks for pushing me over the edge @spartacus2002. @cjk if you're going from a 7s26 movement to a 4r36 (called the NH35 or NH36 depending on whether it has date or day/date) then you're going to need a new crown and stem as well. The stem that comes with it isn't actually for use with a crown. I found this out the hard way a few weeks ago. You'll also want 2-3 extra stems for practice. |
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Posted: 3/30/2021 8:14:17 AM EDT
[#23]
Thanks for the tip on the crown, have one ordered along with the tool kit.
Ive seen some mention you need to swap the movement holders, grey to black. Some don't though. Same with a new case back, some say you need a replacement, others don't. Any advice? |
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Posted: 3/30/2021 8:29:56 AM EDT
[#24]
Quote HistoryQuoted: Thanks for the tip on the crown, have one ordered along with the tool kit. Ive seen some mention you need to swap the movement holders, grey to black. Some don't though. Same with a new case back, some say you need a replacement, others don't. Any advice? My understanding is that you need a caseback that matches your movement holder. 7s26 and NH35/36 have different movement holders. There are youtube videos about how to swap movement holders so you can use your original caseback. I have never done it because I replaced the stock caseback with a windowed one when I replaced the 7s26 movement in my first SKX. That's my only store-bought Seiko with a 7s26. I have a Samurai with the NH35. My others I build with regulated NH36 movements from Namokimods.com. |
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Posted: 4/1/2021 11:24:55 AM EDT
[#25]
When I pulled up the took kit listing, there was a Seiko movement suggested:
The vendor also offered aftermarket movements... Now you've mentioned Namokimods.com a few times, so presumably they're a favorite place to buy. The Seiko failed, therefor maybe its not as good as the other one? Looking for your thoughts Master. 
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Posted: 4/2/2021 9:49:23 AM EDT
[#26]
I have two regulated 4R36s from Namoki. One does fine. The other randomly gained 5 minutes overnight Wednesday night.
 ETA: I set time last night on all 3 watches, this one gained 3 minutes overnight. WTF. |
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Posted: 4/2/2021 7:58:56 PM EDT
[#27]
My other 4r36 picks up a good three minutes a week.
Just got word from Seiko that the Monster was done and should be back in my hands on Monday....had I only known.
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Posted: 4/4/2021 7:47:52 PM EDT
[#28]
I think my bad SKX may have gotten the movement magnetized. Apparently that makes them run fast.
Ordered a demagnetizer, will use it and report back middle of the week. |
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Posted: 4/5/2021 7:42:30 PM EDT
[#29]
Got all my tools and all my parts. Got everything together except for the second hand...
Holy crap is that thing tiny. Then I remembered I didn't change the movement holder, black to grey. Took everything apart again, swap holders and reassemble. Try the second hand again FOR LIKE HOURS.  Tried the hands from an old Luminox that still glows just a bit, nope, won't fit. Im going to have to mount the moment to my milling machine, clamp the second hand in a chuck, get some 1000x mag camera to get that damn second hand seated. Until that happens Im running it without and happy with it so far since 3pm.  Attached FileETA the red tint on the lower bezel is just my sun burnt self reflected. |
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Posted: 4/7/2021 12:22:33 PM EDT
[#30]
Quote HistoryQuoted: I think my bad SKX may have gotten the movement magnetized. Apparently that makes them run fast. Ordered a demagnetizer, will use it and report back middle of the week. So I demagnetized the watch, after 24 hours it had gained 2 minutes. Demagnetized it again, after 24 hours it had gained 1 minute. It might be the old bezel I swapped onto it 2 weeks ago. So I replaced it and demagnetized it again 2 or three times . Will report back tomorrow.
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Posted: 4/7/2021 12:23:54 PM EDT
[#31]
Quote HistoryQuoted: Got all my tools and all my parts. Got everything together except for the second hand... Holy crap is that thing tiny. Then I remembered I didn't change the movement holder, black to grey. Took everything apart again, swap holders and reassemble. Try the second hand again FOR LIKE HOURS. Tried the hands from an old Luminox that still glows just a bit, nope, won't fit. Im going to have to mount the moment to my milling machine, clamp the second hand in a chuck, get some 1000x mag camera to get that damn second hand seated. Until that happens Im running it without and happy with it so far since 3pm. https://www.ar15.com/media/mediaFiles/89642/9D6A3404-11A1-442D-AF0C-304D631E429B_jpe-1894230.JPG ETA the red tint on the lower bezel is just my sun burnt self reflected. I use a headset with magnification lenses. I stick it onto a hand-emplacement tool with some Rodico putty. It's a bitch. |
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Posted: 4/7/2021 1:35:03 PM EDT
[#32]
I’ve got one of those magnified lights on an arm that clamps to a table. I’m starting to think I may have dented the tube in the center of the second hand trying to push it on. I’m going to try to get a better look at it tonight. Maybe take a pic of it and blow it up. If it’s damaged I will order a new one and a 10x loupe or magnifying glasses.
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Posted: 4/8/2021 2:48:49 PM EDT
[#33]
Quote HistoryQuoted: So I demagnetized the watch, after 24 hours it had gained 2 minutes. Demagnetized it again, after 24 hours it had gained 1 minute. It might be the old bezel I swapped onto it 2 weeks ago. So I replaced it and demagnetized it again 2 or three times . Will report back tomorrow.Quote HistoryQuoted: Quoted: I think my bad SKX may have gotten the movement magnetized. Apparently that makes them run fast. Ordered a demagnetizer, will use it and report back middle of the week. So I demagnetized the watch, after 24 hours it had gained 2 minutes. Demagnetized it again, after 24 hours it had gained 1 minute. It might be the old bezel I swapped onto it 2 weeks ago. So I replaced it and demagnetized it again 2 or three times . Will report back tomorrow.After 24 hours, it is running 5 mins fast. Might have to chuck the movement and get a new one.
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Posted: 4/27/2021 6:08:55 AM EDT
[#34]
Wanted to report back:
I ordered and received all the tools, which were really in-expensive for all the stuff that came in the kit, some of them are a bit on the "cheap" side, but should be just fine for the work. Removed the back cover, put about 2 turns to tighten the nut the winding weight pivots around and it's been working ever since. Finally got to watch several Videos and was shocked how easy a lot of this really is! I ordered a N36 movement in anticipation of changing it. but simply tightening a loose nut solved the problem (at least for now) but if it acts up again, I'll have everything on hand. Saw this in the EE if you need a Second Hand or crystal: https://www.ar15.com/forums/Equipment-Exchange/Seiko-SRP777-with-without-AR-crystal-titanium-Zulu-extra-hands/149-2117427/ |
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Posted: 5/18/2021 9:15:09 AM EDT
[#35]
Glad it worked out!
 Yeah, the Seiko are stupid easy to mod or to build from scratch. It costs more to build from scratch but then you have a truly-custom watch. I built this from scratch a month ago, I need to post the build pics I took. 
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Posted: 5/18/2021 2:04:47 PM EDT
[#36]
@fp1201
What tools did you order and where from? Red |
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Posted: 5/18/2021 3:30:13 PM EDT
[#37]
https://www.amazon.com/dp/B07STW7VZ2?tag=arfcom00-20
There are many others and all seem to price the same until you get into what I expect are "Professional" Tools. They also sell the NH35 and NH36 Movements, just search. Also this stuff is used extensivly to clean and seems to be a must: https://www.amazon.com/Original-Bergeon-6033-Cleaner-Cleaning/dp/B00UC363NI/ref=pd_rhf_dp_s_pd_crcd_2/131-4375589-8337229?pd_rd_w=uxkyQ&pf_rd_p=ecb2692f-0365-4eca-a102-58ef51a608ce&pf_rd_r=3QJQ320GVKW5WFR2JZMX&pd_rd_r=f060bd3e-f27f-4bd3-a0ae-cd2699a95200&pd_rd_wg=khF7f&pd_rd_i=B00UC363NI&psc=1 |
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