When I put my one ahead the lever goes forward and both shafts turn same rotation but on ahead the gears don't engage unless I turn outlet by hand?

Thank you. Just purchased a c34mk2 with a noisy tranny. Figure I'll re&re it when I've got it out for the new damper plate. This is very helpful

Great Job putting this together! It was a huge help! I watched it 10 times at least during the rebuilding process of my HBW 100. Like you, I'm pretty sure the reason it slipped was due to the thrust washers being worn. Clutches seemed ok but replaced all of them. The shims 53,54,55,56 were all on the reverse side of the shifting actuator. None on the FWD side. It has been worked on before, so I don't trust they are in the right place. Just getting ready to press it all back together.

TRANSMISSION IS HBW-10 NOT HWB..

hello moltzvt, seriously thanks for this posting. Great to see about US and German ingenuity ! This is a very helpful vid and conserves existing HURTH installations.

Quanto litros de óleo bota nela

Thank you for the great video, I'm having trouble finding an exploded view or diagram of any kind for a hurth hbw 250, I saw nothing on the Foley site you mentioned, have any suggestions you can offer? I'm trying to replace warn disc's also. Thank you

Do you happen to remember the thickness of the forward thrust washer? Im hoping i can get a higher quality one from McMaster Carr

The seals on the caps are 0.3 mm. If you omit the gaskets you have to use a total of 0.6mm less spacers on each shaft.

The hurth 10 and 100 have different specs. I replaced the 10 with a ZF12m and it was perfect.

Thanks for sharing. Having same Problems with equal gearbox. The clicking noise in neutral gear is confusing me. Shouldn't this be quiet?

Thanks for sharing this great Job. Greetings from La Gomera

Hi thanks for the video! Do you have to take your boat out of the water to take it out? Just to know if I can do the same coz I have the same problem. Kr Antoine

Great video. I benchmarked this years ago and have a friend you is thinking about trying it. I tried to get to the link you listed at 10:39 but it did not work. Can you post a link to the manual?

Good work fella My issue seems less daunting now😀

Sorry how can I know more better about this engine do you have a school

I know I'm repeating others but thank you for posting this video and leaving it online years later. Many of us still have these gearboxes and your video is a great help in understanding how simple an overhaul job is - and how the transmission works.

STOP!!!! You mixed up the spacer ring and inner race for the needle bearing of the forward gear!! This is very important!!. First the sim's, than the spacer and finally the needle bearing.

HWB 10 Is not the same as the HWB 100, Hurth Vs ZF branding as far as I can tell. HWB 100 is the ZF10M though

Was the thrust washer included in the kit?

Thanks for the video. Rebuilding a Hurth 360 my self, but can not find out if the special nut is supposed to be torqed to any spesific spec? You skipped this part in the video

at the 17 min i was yelling: stooooppp the needle bering is on the other way around... :(

Would you happen to still have the blowen up diagram of the assembly of the shafts?

The last part of the assembly of the output shaft is incorrect. It’s the shims, spacer and then the needle roller race. I’ve checked the manual just to confirm.

Thiis a job for East Coast Marine Lot more involved than just replacing parts. Last thing you want is to go thro this and have it fail one year out at an inoportune time!

Great detail! thank you for putting this together!

Can you direct me to Jonathon in DR's video?

thinking of buying a press to tackle this myself - how many tons is needed for the press pls? tks

pretty good marine gear box and good explanation what is the gear ratio ? input rpm to output rpm? plz mention the ratio thanks

Thanks for posting, very helpful.

Hello, perfect video, thank you! But, please, why do you apply the sealing between the halves of cover? In my original gearbox is nothing (it is anomalous, but true nothing). .. P.S. old Hurth HBW 10-2R = newer Hurth HBW 125 = new Hurth ZF 12 M (about internet repair manual (?))

Really nice! Thank yoU!

Ith Hurths

Thanks for taking the time to make this. I've got some slipping in my gear box and was interested in seeing how the gear works. Your video really helped me.

Hello, I posted this video when I did my transmission because I could not find a similar video to help me. I hope you find it useful. I am not on this site on a regular basis so if you have a question I will try and answer it as best I can. Might be best to email me [email protected]. I am not an expert but a person who made a repair just like you all.

Great video. please could I make a question?. I replaced the inboard diesel engine of my sailboat for one That has a ZF gearbox 2x1, an old model from late 80´s, but a kept the same propeller wich is left handed and now when I move the control forward the boat goes backwards so if I want to go forward I have to move the control to reverse, and somebody told me that I should change the propeller because that gearbox was made for rigth handed propeller and I could not use like this because the gears of the reverse are weaker than the ones that goes forward. So what I see in your video is that they are exactly the same and I should only change the position of the cable on the control system. Does the zf gearbox for inboard engines works like this one? Am I right or I should replace the propeller? I will be greatful to hear an answer from you.

Great video, this has me wondering why the 2 bronze trust washer had so much wear ?

Great video. So after you installed the spacers correctly the forward mainshaft gear and the forward input shaft gear lined up, correct? I noticed they didn't in the video prior to your first assembly.

Do you know where I can get the shifter cover assembly? I have been looking everywhere but no luck. Thanks

Hi thank you so much for showing us all how to make a rebuild. After a long trip home I start getting this noise in forward gear and it looks like the neutral gear shaft? Is loose? I would be grateful if you could take a look on my video and give your thoughts on what wrong and what to fix. Any help is much appreciated! First part is in neutral the reverse and forward at the end of the clip. kzbin.info/www/bejne/pJiXnIGioNmJgdU

Thanks for your time in making this video!!! My trans just started slipping, after watching your vids I am thinking I have a shot thrust washer. I will be tackling the rebuild myself after watching!

You would not have the dimensions of the thrust washers by any chance? The box I am rebuilding, although said to be working, has no thrust washers, only shim washers. I can order from the USA but given transport costs and insecurity through African mail would rather make bronze washers myself. If I can find the dimensions.

I have rebuilt several Hurth boxes.Warming the inner bearing sleeve is recommended by Hurth.However I dont think it makes a lot of difference but does go on easier.Personal choice I suppose..

Thank you for the video. I replaced my Hurth HBW100 transmission with a new PRM120, which is 1 1/2" longer than the Hurth and so forced me to move the engine forward by 1" (on my Catalina 36). So I now have a Hurth core that I need to figure out what to do with.

Where did you purchase the replacement parts?

Thanks for the videos, gave me confidence to rebuild my HBW-10. One question, the drawing that I'm using shows two sets of shims 53,54,55,56. Upon disassembly, I only have 3 shims on the forward gear side of the gearset and absolutely none on the reverse gear side. I've dry fitted the gears into the two housings and everything works. Just curious if the shims and number of shims are variable based on differences in the parts dimensions. Wondering if I ought to disassemble it (again) and add the same number to the side that is missing them? Once again thanks for the videos. Btw, it's been a year now, do you have any post scripts? Best regards, Scott

Hi - the nut holding on the output flange requires a special tool - this costs a lot. I used a BMX Freewheel Removal tool which cost me £5. The nut was very tight and required an impact driver to undo. The clutch friction and driven plates, thrust bearings and seals for the Hurth HRB10 fit the Kanzaki KBW10. The Kanzaki is the gearbox I worked on (to fix slipping clutch on forward drive), My parts came from ASAP -Supplies. The main difference between the Kanzaki and Hurth gearboxes is that the case doesn't split on the Kanzaki. I also had to replace the output shaft taper bearings which were just standard bearings available from bearing suppliers. You need a puller with a good reach and I used a press to get it all back together. boatinfo.no/lib/gear/manuals/hurth-5-10-20.html explains the Hurth - I never found a Kanzaki manual (but didn't look very hard).

Thanks for the video. I have a 250hsw and it is secular for me to get a feel for a similar box.

Hi there ,, can u tell me is the Hbw 10 2r , the same as the Hbw 100 2 r ,, thanks

Seems to be 2 options for parts mfgrs--ZF (formerly Hurth) and Alto, less expensive, a US company that makes clutch parts. Any opinion as to the quality of either product?