Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-01-2014, 02:57   #16
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 11,447
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Harry, thanks for that, and there ain't no strangers on the internet...?

From your initial comments I thought you might have specialist knowledge... thanks for replying with common sense instead!

Cheers,

Jim
__________________

__________________
Jim and Ann s/v Insatiable II , lying Port Cygnet, Tasmania once again
Jim Cate is offline   Reply With Quote
Old 10-01-2014, 06:31   #17
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,036
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Look around here for any kind of lubrication questions, especially something that isn't boat specific
- Bob is the Oil Guy
__________________

__________________
a64pilot is online now   Reply With Quote
Old 10-01-2014, 13:57   #18
Registered User
 
Tynesider's Avatar

Join Date: Oct 2010
Location: Northumberland UK
Boat: Colvic Watson
Posts: 94
Images: 12
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Quote:
Originally Posted by GrahamW View Post
A friend of mine has a 1993 29HP Perkins Perama with a Hurth HBW100 gearbox.

On taking her out one day at the end of last season we noticed a marked d

Does anybody have any suggestions as to what the problem might be?

Thanks for your help.
Hi Graham

Sounds a familiar problem!

Replaced my own Hurth HBW 100 gearbox in 2011 and also a friends in 2012, both were replaced with a ZF10 box as it is a straight swop fit no problem.

However if you check there is a slight difference in the gearbox ratio and I run at slightly less revs than before to achieve the same knots.

One thing no one has mentioned is when you take the gearbox out you should check and consider replacing the thrust or drive plate as this may also be worn and in any case 'IF' it goes at a later date you then have the nice job of taking the gearbox back out again!

You can buy the drive plate direct from the manufacturer R & D MARINE R and D MARINE : Marine Damper Drive Plates

I also spoke at some length to ZF gears and they recommend to prolong the gearbox life to change the oil every 100 hrs and do NOT overfill the gearbox.

Hope this might help
__________________
Mike

Archivist for the Colvic Watson Owners Group
Tynesider is offline   Reply With Quote
Old 10-01-2014, 14:01   #19
Registered User

Join Date: Apr 2011
Posts: 2,243
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Yes there isn't much oil in the gearbox, and 100 hours is not too soon. I changed mine after 300 hours, and it looked horrible - almost black, and it stank. 100 hour intervals for me from now on.
__________________
MarkSF is offline   Reply With Quote
Old 10-01-2014, 14:35   #20
Registered User

Join Date: Oct 2010
Location: michigan
Boat: CORBIN 39
Posts: 301
Re: Hurth gearbox - loss of drive in ahead but fine in astern

There is a water cooler available for this tranny, it would be a good buy as it works very well to keep the tranny cool. mounts on the side externally. parts for the hurth are no longer available. the zf is the replacement box
__________________
sailr69 is offline   Reply With Quote
Old 10-01-2014, 14:45   #21
Registered User

Join Date: May 2008
Location: British Columbia, Mexico
Boat: S&S Hughes 38
Posts: 837
Images: 23
Re: Hurth gearbox - loss of drive in ahead but fine in astern

What I read here earlier somewhere is that the Hurth/ZF Box wear from not being used.It seems that bearings sit above transm.fluid in oxygen and they rust,when transmission sits unused.It has been suggested to fill transmission to top when boat in storage.Of course it would have to be drained to correct level before use.
__________________
highseas is offline   Reply With Quote
Old 10-01-2014, 18:59   #22
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,767
Quote:
Originally Posted by highseas View Post
What I read here earlier somewhere is that the Hurth/ZF Box wear from not being used.It seems that bearings sit above transm.fluid in oxygen and they rust,when transmission sits unused.It has been suggested to fill transmission to top when boat in storage.Of course it would have to be drained to correct level before use.
That Is the recommended storage practice, but most failures of these boxes are from clutches slipping and overheating.
__________________
Sailmonkey is online now   Reply With Quote
Old 10-01-2014, 20:40   #23
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 6,385
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Quote:
Originally Posted by MarkSF View Post
Yes there isn't much oil in the gearbox, and 100 hours is not too soon. I changed mine after 300 hours, and it looked horrible - almost black, and it stank. 100 hour intervals for me from now on.
Transmission Fluid 101 Transmission Fluid 101

About 150 hours.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 27-01-2014, 09:30   #24
Registered User

Join Date: Jan 2012
Posts: 22
Re: Hurth gearbox - loss of drive in ahead but fine in astern

Many thanks to all who have posted in reply to my original post and follow ups - the advice has been very helpful.

Apologies for the delay in responding - I have been away for a couple of weeks.

It seems that a complete overhaul will be required and I plan on taking the transmission out and sending it off to be done.

I would welcome a bit of advice on just how to deal with removal but will start a separate thread for that.

Regards

Graham
__________________

__________________
GrahamW is offline   Reply With Quote
Reply

Tags
gear, gearbox, head, hurth

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:24.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.