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Of fan blades, lock tabs an' foolishness.

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DrEntropy

DrEntropy

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So. This weekend I guilted meself into 'prettyin' up' the engine. Had a rattle-can of an approximate (shun me if you must) engine colour and proceeded to clea/mask/disassemble bits to make the thing look like it deserved to be in the car. Removed the fan and pulley, the bloody lock tabs for the hub turned to scrap. "No prob! I KNOW I've got spares inna garage ~somewhere~ in that pile." HAH! Not only could I not find the things but I also couldn't find the rattle-can of "school bus yellow" whot shoulda been there as well... Trip to th' local "home improvement center". No Joy. "Close enuff! I'm OVER it." Monday AM I'm cross-drillin' the four bolt heads and BY ALL THAT'S HOLY that thing is goin' back together TODAY!--- Talk about overkill... but I never have to worry about locktabs for THAT thing again /ubbthreads/images/graemlins/wink.gif
 
safety wired? i think thats what ya said. i did lots of that when in the USAF. I even have a set of pliers.



mark
 
hahah... I know I've done more than my share of safety wiring in the Marines too! /ubbthreads/images/graemlins/laugh.gif
 
Yup-yup... safety wire and pliers in-hand, I *fixed* it!

Bloody PERMANENTLY.
 
Mine has had plain old lockwashers on it for 50 years. Used the same when I replaced the fan. See pic. Haven't loosened yet. Do you think I should add safety wire?
D
 

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The B engines have a li'l rubber bush like a grommet and a steel sleeve inside that... "shock absorbers". When the rubber gets old/trashed the vibration tends to loosen the bolts BEFORE you get much warning. Then it sounds like a rod knock, and damage can be exponential: Things start to come apart rapidly. I just would rather take the "chance" factor outta th' equation. Hunting for the lock tabs every third time the pump gets R & R'd finally got my goat, so safety wire it is. If it were bolted directly to the hub, I might use just split washers an' a dab of Loctite.
 
[ QUOTE ]
The B engines have a li'l rubber bush like a grommet and a steel sleeve inside that... "shock absorbers".

[/ QUOTE ]
Why? - Is the fan unbalanced? If so, why not balance the fan & bolt it solid? If the fan has harmonics the blade spacing could be changed & still be balanced. Just trying to learn something new. Thanks,
D
 
Naw Dave, you don't need no safety wire I been doing the same thing for eons, cuz them fold over things ain't no good--- /ubbthreads/images/graemlins/nonod.gif---Keoke
 
Not sure "why" BMC used rubber bushes, mebbe they thought it would prolong the life of the w/pump... they disappeared at some point later. Keoke is right: don't *need* no steenkin' safety wire, the tabs ARE junk. A later (plastic, multi-blade) fan would negate the whole 'mess.' My reasoning was: If BMC put the tabs there, it would be ~prudent~ to use something less aggrivating, more renewable. Hence the "overkill" of safety wire. <shrug> "Why not?"
 
DR-E, WE ditched those Mickey Mouse things a long time ago.Initially it was thought the fan's location relative to the radiator might be a concern. Conseguently, we turned an ALuminum spacer with a thicknes the same as the tubes length and bolted the fan up solid,don't even do that anymore.---Keoke
 
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