Volvo Penta DP stuck fwd prop

[vstol]

I just bought a 92 stingray with a 290DP-C1 Drive.<br />The fwd prop was never removed by the first owner and I can not seem to get it off, I have used a bearing puller, heat, and everything else I can think off. Do I have to cut this thing off? I am open for suggestions, don’t want to cut it off, afraid I will damage prop shaft.

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

hahahaah thats a job I do 15 or 20 times a year. takes 4 41/2 cut off wheels and about 1.5 hours a prop. make two cuts along the prop from aft to fwd. break the prop off. cut the rubber from the inner hub. then line up on a groove in the splines and slice it. you will see corrosion dust as you break through the hub. then take a chiesel and finnish cracking the inner hub slightly. then the hub will slide off.<br /> if you have stainless props and wish to save them you can heat them enough with oxy/acetylene to melt the hub. however you will most likly damage the propshaft and bearing box seals. they are not hard to change though.<br /> good luck and I bet after this you will grease the shafts more regularly than the last owner

 

[rabidfish]

Re: Volvo Penta DP stuck fwd prop

I am almost afraid to ask...<br /><br />Have you removed the fwd propnut?<br />Honest, I am not trying to be smart.<br />I have seen it before...

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

hahahaahh<br /> wow rabidfish. good question. I have only seen that one once .

 

[Don S]

Re: Volvo Penta DP stuck fwd prop

I've had it happen once also.<br />This is what the "Nut" looks like<br /><br />

 

[vstol]

Re: Volvo Penta DP stuck fwd prop

yea the fwd prop nut is off, the 290dp-c1 has a cone for the rear prop and the fwd prop has a spanner nut with locking tab washer. I was going to use a saws all to take the blades off (2 of them so that i have handle left)and to cut down to the rubber then use a cutting disk for the center.<br />What do you guys think about that?

 

[vstol]

Re: Volvo Penta DP stuck fwd prop

About heating the prop to melt the rubber? When i was using the bearing puller the outer prop was starting to come creating a gap so that i could get a propane torche directly on the rubber, it started to melt but i stopped in fear of damaging the prop shaft. Do you think i should try that again rather than cutting off the prop?

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

usually when I tourch them off it destrys the shaft seals. I only do it to the stainless props. luckily the stainless props use a different material for the inner hub and rarely stick.<br /> you will find a side grinder is easier to cut with than a sawzall.

 

[rabidfish]

Re: Volvo Penta DP stuck fwd prop

I hate to see you use a torch...<br /><br />If you have to cut it, use a disc cutter. That way you'll do minimum damage. I hate to ruin a perfectly fine outer propshaft, especially on that drive. Props are cheap...(relatively)<br /><br />I really hate that this happened, especially since it could have been avoided for pennies!

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

rabidfish<br /> I am with ya. but seein how he posted he just bought it I saved the flame. most customers remember to grease the shaft every 30 days after the first bill I give them for 3 hours labor, 8 grinding wheels and 2 VP props. makes grease look a bit cheap. the only time I light up the smoke on a VP is if it has stainless wheels. then I smoke them off and change the shaft and bearing box seals. lucky the stainless prop hubs dont stick as bad as the aluminium ones.<br /> if your careful with the grinder when done the shaft wont have any marks. the bearing box anode will be cut up but the shaft wont be touched. I use 1/8" wheels and keep lined upon a spline groove and the sudden puff of white poweder tells me when I just broke through. that shaft is about 1150 dollars laying on the counter with no bearings,shims, seals or labor. between crab pots the sandbar at the inlet and the normal cavitation burned aft props I get to cut a lot off each year. most on on home maitained boats.<br /> while grinding if you see sparks you went to deep and quit grinding that spot. the exception is at the fore and aft ends where there is a steel ring aft and a thrust washer fwd. be careful, wear safty goggles and gloves and I alsouse a tyvek disposable suit. that AL poweder mixed with hot melted rubber particles is nasty <br />and yes the customer gets charged for the goggles,gloves and suit. all are throw away when done.

 

[vstol]

Re: Volvo Penta DP stuck fwd prop

Ok Then, I will attempt to cut the fwd prop off today after work, thanks for all the help and suggestions, I will abide by them all.

 

[cmyers_uk]

Re: Volvo Penta DP stuck fwd prop

Just a point get really thin grinding disc. I use disks 1mm (3/64 Think!) thick and the difference between cutting metal with them standard blades is amazing. <br /><br />Q for Rodbolt, This seems to happen mainly to the DP drives, I only grease my SX shaft each year and it just slides off. What causes it to happen on the DP drives?<br /><br />Regards<br /><br />Chris

 

[tommays]

Re: Volvo Penta DP stuck fwd prop

i cut with a united abrasive (SAIT) 4-1/2 x .045 wheel goes right through very fast but doesent last very long<br /><br /> #22021 type 27 depressed center cutting wheel<br /><br />you can get them at most welding supply houses<br /><br />tommays

 

[Don S]

Re: Volvo Penta DP stuck fwd prop

Chris<br />The DP forward prop has a larger diameter shaft with a lot more splines. Just a lot more surface area to corrode and cause problems, plus close tolerances. <br />The reason they corrode on like that is the lack of grease on the splines, or even worse, someone tried to use Never sieze on them.

 

[rabidfish]

Re: Volvo Penta DP stuck fwd prop

Don's right, more area means more corrosion!<br /><br />Also Vstol: I am not blaming you in any way here, I know you just bought it. I'm sickend by the previous (owners/and their dealers) lack of care.<br />For those of us in the "bidness". We get sick of hearing how the day he got rid of it was his happiest day ever. if you take good care of it, you'll have a blast, for years to come!<br /><br />I don't deal with saltwater the way these other guys do but if you grease it even twice a year, it'll prbably never get stuck again.

 

[cmyers_uk]

Re: Volvo Penta DP stuck fwd prop

Don, Thanks for the explanation. Just curious not sure Ill ever manage to afford a DP but live in hope.<br /><br />Regards<br />Chris

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

hello<br /> yep what don says. the clearence is so tight that paint on the splines of the hub will prevent installation,unless you drive it on which is a no no. the reason I use the 1/8" thick wheel is cause when it tries to snag on the melted rubber the thin ones tend to bind and fly apart. in my advacing years I have noticed I am no longer fast enough to dodge the flying wheel parts .

 

[seahorse5]

Re: Volvo Penta DP stuck fwd prop

Don S,<br /><br />In tropical saltwater I've found that the nickel based Snap-On anti-seize works better than marine grease on the fwd. dual prop than marine grease for those customers that do not get their rigs maintained often enough.<br /><br />Have you had problems up there with anti-seize on the shafts?<br /><br />Normally, I hate anti-seize on marine stuff, except turbos and manifold bolts, but over the years, this particular brand works great for us on the Volvo duo props.

 

[rodbolt]

Re: Volvo Penta DP stuck fwd prop

seahorse<br /> I to use the nickel based on rigs that dont come out of the water but once per year or so with no problems on volvo. the rest get the yamalube or special lube 101.<br /> I did try perfect seal. man what a nightmare

 

[Don S]

Re: Volvo Penta DP stuck fwd prop

I just use the spline grease on the props and never have problems taking off the props on a yearly basis.<br />Personally I hate the mess that any anti seeze makes, and as long as something works just as well why make the mess.