[Amel Yacht Owners] SM Volvo transmission cable adjustment
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Bill & Judy Rouse <yahoogroups@...>
Mike, There are two cables running from the single arm Morse Throttle/Shifter. Each are independently adjustable in the engine room, near their termination points. It sounds to me as though the shifter cable is loose in the engine room. That is what I would check first. With the engine OFF have someone move the Morse Throttle/Shifter forward then backward while you inspect the cables in the engine room. Best, Bill BeBe 387 On Sun, Oct 16, 2016 at 11:37 AM, 'Mike Ondra' mdondra@... [amelyachtowners] <amelyachtowners@...> wrote:
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Bill Kinney <greatketch@...>
Mike,
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It is good news that the transmission shifts well by hand, delay in shifting can be caused by internal problems with the transmission. The following assumes you have a HBW-250 transmission: According to ZF specs travel of the end of the shifter arm should be equal going from neutral to forward and from neutral to reverse, and the movement should be between 30 mm and 35 mm from neutral to engaged. If more travel than this is needed, or the travel from N-F and N-R is unequal, you have an internal issue that needs to be addressed. There is adjustment at both ends of the cable. An adjustment at the shifter end controls how far the cable moves, and an adjustment at the transmission end controls the center point of the movement. The objective is to have the shifter lever move by cable the same amount it moves when you shift it by hand without the cable attached. On my Amel, the easier adjustment by far is the one on the transmission end. The end of the cable is threaded, with a jamnut to hold the setting. To make the adjustment you have to pull the pin that attaches to the transmission, and turn the barrel bolt on the cable end. If this verbal description makes no sense, I can email you a photo. The only way to make the adjustment on the shifter in my boat would be to pull the shift out of the dash. I haven’t done that so I can’t describe it in detail. Look at all this AFTER you check to be sure the clamp holding the cable is tight as Bill R suggests.
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Thanks guys. This came up at the end of the day and i only quickly took a look at the transmission end. The cable was well secured. I suspected, as Bill Kinney points out, that there would be adjustment at the end of the cable, but could not see threads, hence the question. Could be a simple adjusrment.
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Mike Ondra Aletes SM#240 Rock Hall, MD On Oct 16, 2016, at 3:47 PM, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote: |
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Thanks for the technical info. This Morse cable is 17 years old, with maybe 3500 hrs. Are their failure modes for the cable itself? Or maintenance (oiling)? Mike Ondra Aletes SM#240 Rock Hall, MD
From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Sunday, October 16, 2016 3:47 PM To: James Wendell ms42phantom54@... Subject: Re: [Amel Yacht Owners] SM Volvo transmission cable adjustment
Mike,
It is good news that the transmission shifts well by hand, delay in shifting can be caused by internal problems with the transmission.
The following assumes you have a HBW-250 transmission:
According to ZF specs travel of the end of the shifter arm should be equal going from neutral to forward and from neutral to reverse, and the movement should be between 30 mm and 35 mm from neutral to engaged. If more travel than this is needed, or the travel from N-F and N-R is unequal, you have an internal issue that needs to be addressed.
There is adjustment at both ends of the cable. An adjustment at the shifter end controls how far the cable moves, and an adjustment at the transmission end controls the center point of the movement. The objective is to have the shifter lever move by cable the same amount it moves when you shift it by hand without the cable attached.
On my Amel, the easier adjustment by far is the one on the transmission end. The end of the cable is threaded, with a jamnut to hold the setting. To make the adjustment you have to pull the pin that attaches to the transmission, and turn the barrel bolt on the cable end. If this verbal description makes no sense, I can email you a photo.
The only way to make the adjustment on the shifter in my boat would be to pull the shift out of the dash. I haven’t done that so I can’t describe it in detail.
Look at all this AFTER you check to be sure the clamp holding the cable is tight as Bill R suggests.
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