Re: [Cal_Boats] Hurth gears and other boat toys (Timm)
Timm,
Thanks much. Great info as always! Just as I am closing in on reducing the
to do list to one page instead of two pages one more project to worry about.
My transmission seems to be OK now so I'll take a wait and see and do what I
can to treat it gingerly. If I recall reverse is a weakness with the
Hurth...
Finally have begun the rewire job with the help of Richard Clopton (XL) and
some good ideas from you, Duane and Mark.
Just more boat bucks....this was a "bargin" boat when I first looked at her.
*Mike*
**
On 12/20/07, ti… [at] ch2m.com <ti… [at] ch2m.com> wrote:
>
> Of course Mike, you'll have to check things out, but I replaced
> my failed ZF/Hurth, with a Techno drive Twin Disc transmission TMC40P.
>
> This was installed on the Universal / Westerbeke MD-20.
>
> To re-gain alignment (different shaft offsets, the drop center of the
> TMC40 is 68mm and the HBW50 is 62mm) I had to move (shim) the engine at a
> slightly different height and angle. I did this by installing ironwood
> pieces under the existing rubber dampened motor mounts... I could have gone
> without the shims, possibly, as there was adjustment room on the mounts, but
> the engine was near the top, and tended to wobble a bit too much for my
> taste. With the shims, it now sits lower on the mounts, and appears much
> more stable.
>
> This is a most excellent replacement and has been done many times,
> according to Joe DeMers, who sold me the new unit, with a new dampener plate
> (required to match-up). There where some very small adjustments made for me
> to accommodate the different position shift lever in my engine bay (grinding
> back part of the engine bed).
>
> I'm very happy that this worked out, as the new tranny has a better
> friction method in my opinion (cone) and is rated to match my potential HP
> output under any circumstances..
>
> The Hurth appeared to be suitable "most of the time" just barely... until
> it burned up.
>
> [image: twin disc – technodrive TMC40]
> *Pleasure Rating:* **
> Intermittent operation with very large variation in engine speed. Maximum
> power capacity is intended only for personal use, planing hull pleasure
> craft where full engine throttle operation will be less than 10% of the
> total time with balance of time at 80% of full throttle engine RPM or less.
> Annual operating hours up to 500. (For TMC transmissions 300 hours/year).
>
>
> ** *TMC40* Horse Power Input Rating
> Pleasure RPM
> Intermediate RPM
> Continuous RPM
> Ratio
> 3000
> 3600
> 2800
> 3000
> 1800
> 2300
> 1.45
> 34.9
> 34.9
> 34.9
> 34.9
> 24.1
> 30.8
> 2.00
> 34.9
> 34.9
> 28.2
> 32.2
> 17.4
> 22.8
> 2.60
> 29.5
> 34.9
> 22.8
> 25.5
> 12.1
> 16.1
>
>
> *ZF/Hurth Rating*:
>
>
> * <http://www.simplicity-marine.com/ZF/Definitions/Definitions.htm>*
> *PLEASURE DUTY CLASSIFICATION* *MODEL* *RATIOS* *MAXIMUM INPUT POWER*
> "A" "B" *2600 rpm* *2800 rpm* *3200 rpm* HP/rpm ft.lb *kW/rpm* *Nm* HP *kW
> * HP *kW* HP *kW* *
>
> ZF 5 M
> *(HBW 50)
>
> 2.050
>
> 1.860
>
> 23
>
> *17*
>
> 25
>
> *18*
>
> 28
>
> *21*
>
> 0.0089
>
> 46
>
> *0.0066*
>
> *63*
>
> 2.720
>
> 2.150
>
> 16
>
> *12*
>
> 18
>
> *13*
>
> 20
>
> *15*
>
> 0.0063
>
> 33
>
> *0.0047*
>
> *45*
> Max engine speed: 5000 rpm. Max Input Power 20 kW.
>
> .
> *CONTINUOUS DUTY CLASSIFICATION* *MODEL* *RATIOS* *MAXIMUM INPUT
> POWER* "A" "B" *1800** rpm* *2300 rpm* *2600 rpm* HP/rpm ft.lb *kW/rpm* *
> Nm* HP *kW* HP *kW* HP *kW* *ZF 5 M
> *(HBW 50) 2,050 1,860 13 *10* 16 *12* 18 *14* 0.0071 37 *0.0053* *51*
> 2,720 2,150 9 *7* 11 *9* 13 *10* 0.0050 26 *0.0037* *35* Max engine speed:
> 5000 rpm. Max Input Power 15 kW.
>
>
> ------------------------------
> *From:* Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] *On
> Behalf Of *Michael Robinson
> *Sent:* Thursday, December 20, 2007 3:07 PM
> *To:* Ca… [at] yahoogroups.com
> *Subject:* Re: [Cal_Boats] Hurth gears and other boat toys(Tom)
>
>
>
> Hello Tom,
> Sorry to hear you're not feeling well but glad to hear you are still with
> us.
> Regarding Hurth (I have one, seems OK now). What do you recommend as a
> replacement for aCal 36 with a Westerbeke 27?
>
> Mike Robinson
> Holiday
> Cal 36 #4
> Pt. Richmond, CA
>
>
> On 12/19/07, Tom Vandiver <bs… [at] yahoo.com> wrote:
> >
> >
> >
>