Folding volvo prop advice

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markhomer

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Time coming soon to reassemble the three blade folding prop , is it better to use loctite on the anode cap screws and prop blade pin retaining capscrews , or shake proof washers , company that drilled out and fitted helicoil for broken blade pin retaining capscrew said they would never use loctite or studlock , rather shake proof washers , this was west of scotland engineering who are very experienced , ( and very expensive ! ) , any thoughts ?????? I have ordered new caps and washers

Cheers
 
markhomer said:
Time coming soon to reassemble the three blade folding prop , is it better to use loctite on the anode cap screws and prop blade pin retaining capscrews , or shake proof washers , company that drilled out and fitted helicoil for broken blade pin retaining capscrew said they would never use loctite or studlock , rather shake proof washers , this was west of scotland engineering who are very experienced , ( and very expensive ! ) , any thoughts ?????? I have ordered new caps and washers

Cheers
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I used Loctite on my 3 blade folding prop and it fell off in the middle of the Solent a few weeks later. I purchased a better designed prop that has never needed Loctite. A Brunton Autoprop - highly recommended.
 
I have only ever done them up tight. Hope thats not a bad omen! :eek:

Forgot to say - Volvo 3 blade folder.
 
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I have used loctite or more accurately the blue stuff that came with the prop for many years without problems; it's what Volvo recommend.
 
Loctite is to general to say!
You will need to use their Thread-Locking !
Many people take a loctite from the store and do not read the stickers!
Most hardware stores selling Thread Sealing, which would not do the job for you in this case!
 
Xcincuella is making a very good point, there are many different loctite products for a range of applications.

Personally, I'd use two part epoxy (araldite 2011 precision) on all threads on under water assemblies I don't want to come undone, and yes I have suffered a blade loss on a two bladed volvo.
 
Volvo being the fine fellas they are , dont give technical advice ! , rather they say to contact your nearest dealer, which i think is unfair and reluctant to do , as through their advice given the are only losing out on work as i wont be asking them to do the job , volvo penta however have allready made oodles out of the origonal engine sale ,.

Hence my request on this site .


Should i use studlock or similar whats best way of withdrawing screws in winter, apply heat and screw out hot , or cold after heating .?????

Bare in mind ive allready had one screw shear this year on extraction ( sheared with remarkeably little force ) and paid the penalty £50 scottish squids , thats two bottles of malt in the not so distant old days !!!
 
Definitely do not use Studlock grade, it's for non removable parts,, the one you want is called screwlock which is also known as 222.
 
markhomer said:
Volvo being the fine fellas they are , dont give technical advice ! , rather they say to contact your nearest dealer, which i think is unfair and reluctant to do , as through their advice given the are only losing out on work as i wont be asking them to do the job , volvo penta however have allready made oodles out of the origonal engine sale ,.

Hence my request on this site .


Should i use studlock or similar whats best way of withdrawing screws in winter, apply heat and screw out hot , or cold after heating .?????

Bare in mind ive allready had one screw shear this year on extraction ( sheared with remarkeably little force ) and paid the penalty £50 scottish squids , thats two bottles of malt in the not so distant old days !!!
Click to expand...

Use what VP recommend and sell. No heat required to undo. http://www.volvopentashop.com/Volspec/en-GB/Details/AccessoriesCatalog/7114?path=6903/6904/7114
 
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Make sure you torque the bolts correctly as per the Volvo manual. The recommended torques are, I recall, around 10 Newtons, which seems remarkably low, and much less than you would naturally apply without using a torque wrench; they should then come out without a problem.
 
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