Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Reversing Gear

Reply
 
Thread Tools Display Modes
  #1   IP: 142.116.40.164
Old 06-05-2023, 04:51 PM
GregH's Avatar
GregH GregH is offline
Afourian MVP
 
Join Date: Jun 2015
Location: Kingston, ON
Posts: 564
Thanks: 385
Thanked 103 Times in 80 Posts
Reverse "too tight"?

is it possible to have reverse band too tight such that there is slippage when in neutral or fwd, but don't have to hold the gear selector in reverse once set by the lever (meaning I can get about 25-40% reverse without holding the level back). I'm assuming the gear selector cable needs replacing but it doesn't feel too hard to move..

I plan to go into and loosen the reverse band nut slightly to see but thought I would pose the musings to the hive-mind.
__________________
Greg
1975 Alberg 30
Reply With Quote
  #2   IP: 184.74.10.106
Old 06-05-2023, 09:18 PM
Al Schober's Avatar
Al Schober Al Schober is offline
Afourian MVP
 
Join Date: Jul 2009
Location: Uncasville, CT
Posts: 2,002
Thanks: 16
Thanked 578 Times in 405 Posts
The reverse adjustment is a funny thing.
Biggest down side to having the reverse adjustment too tight is that you risk shearing the pin holding the roller.
When in forward, the shifter cone moves away from the engine and engages the clutch fingers. In reverse, the shifter cone moves towards the engine and should almost contact the adjusting ring for fwd - 1/16 to 1/8 clearance is good. If it's further away, try backing off the reverse band screw and try again. If you can't get the shifter cone to come within 1/8" of the fwd ring then your linkage needs adjustment.
Once you get full travel of the shifter cone, you can adjust reverse. Snug up the reverse nut so it doesn't slip in reverse. Shouldn't take much as you don't need much power in reverse.
Reply With Quote
The Following User Says Thank You to Al Schober For This Useful Post:
GregH (06-06-2023)
  #3   IP: 98.97.39.50
Old 07-01-2023, 10:56 PM
CnC for me CnC for me is offline
Frequent Contributor
 
Join Date: Oct 2021
Posts: 6
Thanks: 0
Thanked 8 Times in 3 Posts
Reversing housing breakage

So.....
While replacing the hex head pin, apparently I applied too much force and the casting that forms the screw threads snapped. Didn't feel like much pressure so perhaps it was cracked but in any event, the spoked ring now has no way to be held in place.

Obviously at some point I will need to disassemble and replace that part but in the meantime several questions....

1) what is the risk of using reverse without the adjustment ring held in place?

2) what is the risk of using forward without the adjustment ring held in place?

3) what creative ideas does the hive mind have that might help safely use the system.

Thanks in advance for the input.

Karl
Reply With Quote
  #4   IP: 173.89.120.15
Old 07-02-2023, 08:42 AM
msmith10's Avatar
msmith10 msmith10 is offline
Afourian MVP
 
Join Date: Jun 2006
Location: Columbus, Ohio
Posts: 474
Thanks: 19
Thanked 62 Times in 46 Posts
You can repair the broken out adjusting collar retaining screw: the pressure plate through which the screw is threaded has a total of 3 "flats" around the perimeter. You can rotate the plate around to an unbroken flat, drill and tap it for the screw, and you're good to go. I can't see reverse staying in adjustment without that locking screw.
__________________
Mark Smith
1977 c&c30 Mk1 hailing from Port Clinton, Ohio
Reply With Quote
The Following User Says Thank You to msmith10 For This Useful Post:
Sam (07-02-2023)
  #5   IP: 32.220.250.10
Old 07-02-2023, 04:47 PM
Al Schober's Avatar
Al Schober Al Schober is offline
Afourian MVP
 
Join Date: Jul 2009
Location: Uncasville, CT
Posts: 2,002
Thanks: 16
Thanked 578 Times in 405 Posts
The hex screw going through the cast ear is the adjustment for fwd, NOT reverse. The reverse adjustment is the big hex nut that tightens (and loosens) the band that goes around the whole thing. There are plenty of pictures in the archives that are labeled to show what does what.
Reply With Quote
The Following User Says Thank You to Al Schober For This Useful Post:
Dave Neptune (07-02-2023)
  #6   IP: 173.89.120.15
Old 07-02-2023, 08:14 PM
msmith10's Avatar
msmith10 msmith10 is offline
Afourian MVP
 
Join Date: Jun 2006
Location: Columbus, Ohio
Posts: 474
Thanks: 19
Thanked 62 Times in 46 Posts
Thanks for correcting me, Al. It is the forward adjuster. I haven't been in my reversing gear for a while, but I remember that locking screw and the numerous warnings from Professor Moyer about cracking that casting.
__________________
Mark Smith
1977 c&c30 Mk1 hailing from Port Clinton, Ohio
Reply With Quote
  #7   IP: 100.36.81.23
Old 07-05-2023, 10:13 PM
edwardc's Avatar
edwardc edwardc is offline
Afourian MVP
 
Join Date: Aug 2009
Location: Laurel, MD
Posts: 2,509
Thanks: 153
Thanked 595 Times in 388 Posts
Quote:
Originally Posted by CnC for me View Post
So.....
While replacing the hex head pin, apparently I applied too much force and the casting that forms the screw threads snapped. Didn't feel like much pressure so perhaps it was cracked but in any event, the spoked ring now has no way to be held in place...
When tightening the screw, you must be careful to make sure the screw is going into one of the slots in the adjusting ring. This allows the screw to tighten against the tab without putting any shearing force on the tab. If the screw hits one of the raised portions instead, it will take very little torque to shear off the tab.
__________________
@(^.^)@ Ed
1977 Pearson P-323 "Dolce Vita"
with rebuilt Atomic-4

Reply With Quote
The Following User Says Thank You to edwardc For This Useful Post:
Dave Neptune (07-06-2023)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Transmission problem - reverse dwkfym Troubleshooting 2 06-12-2019 06:09 PM
No Reverse pearson1973 Reversing Gear 19 08-18-2017 07:15 AM
Forward and Reverse Gear Adjustment Issues CraigRun Reversing Gear 12 05-17-2012 09:15 PM
Reverse gear overheat?? NorfolkRagbagger Reversing Gear 5 10-13-2010 09:20 AM
Where's Reverse?? ElmaBay Introductions 8 06-02-2009 08:52 PM


All times are GMT -4. The time now is 09:15 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved