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Old 13-01-2018, 07:45   #16
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Re: Dipstick issue

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Originally Posted by stephenlang View Post
Hi All

We are getting ready to cruise, but before we do, I would like to change the transmission oil.
Depending on your cruising plans you may want to leave this job til' you get back. It's beginning to sound as if the plug is seriously galled. You may find yourself dropping broken pieces inside your gear box if you continue. If you bring it out in pieces do you have a replacement ?
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Old 13-01-2018, 08:17   #17
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Dipstick issue

I forget, can you get a vise grip on it? If so then turning it like your unscrewing it wonít hurt anything if itís just held in by O-rings and just in case itís threaded is likely the way to get it out.
Iíd also use heat gun heat, not torch, but a heat gun and stop when it will fry spit, try to loosen, let it cool, try to loosen and repeat.
Finally before I got real stupid with it, Iíd try to remove that breather and before you remove any lube measure the oil level, itís very likely that you can use it as the access to both suction out the lube and to measure quantity.
Once suctioned out, measure how much you got out and compare it to the books stated capacity, it should be close, but if you measure accurately how much you got out, replacing that amount ought to put you right back to your starting level, just with fresh oil.
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Old 13-01-2018, 08:21   #18
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Re: Dipstick issue

According to this Westerbeke operators manual, page 46, the dipstick is on the side opposite the spot you indicate. Is there something there, or is it just a typo or model variation of the JS transmission?

operators manual - Westerbeke
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Old 18-01-2018, 06:10   #19
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Re: Dipstick issue

Success..

Clearing the area of wires and oily residue, heat was applied first with a heat gun to dry things out. and then more serious heat with a torch with a fire extinguisher at the ready. After an hour or so, the dipstick was in my hand. Replaced the 2 O rings with slightly smaller ones. I can now check it easily by hand.

On to the next project.

Stephen
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Old 18-01-2018, 08:15   #20
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Re: Dipstick issue

I am guessing the O rings are sized according to parts manual, if too small they may blow out when the transmission heats up.
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Old 18-01-2018, 08:31   #21
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Re: Dipstick issue

Quote:
Originally Posted by stephenlang View Post
Success..

Clearing the area of wires and oily residue, heat was applied first with a heat gun to dry things out. and then more serious heat with a torch with a fire extinguisher at the ready. After an hour or so, the dipstick was in my hand. Replaced the 2 O rings with slightly smaller ones. I can now check it easily by hand.

On to the next project.

Stephen
Good news. The advice about the o ring size is spot on. Should be a tight fit by hand. Peter
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Old 18-01-2018, 08:40   #22
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Dipstick issue

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I am guessing the O rings are sized according to parts manual, if too small they may blow out when the transmission heats up.


Should not ever be any pressure either positive or negative. The vent should prevent that, it there is ever any pressure then the vent needs cleaning. The only use for the O rings ought to be to provide a little snug fit to keep the dip stick from rattling.
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