<div dir="ltr"><div>Speaking of TR4A fans...</div><div><br></div><div>I did a bit of digging in the parts catalog and found the TR4A was fitted with potentially 3 different fans, 2 different hub extensions and 2 different hub bolts.</div><div><br></div><div>It appears that a 6 blade fan was initially installed and then superceded by 4 blade metal fan. Both use the same hub extension, part number 128318. The extension bolt appears to have a 12 point head, part no. 142185. The same extension is used on the TR4 with the hand crank center bolt.</div><div><br></div><div>A 'plastic' fan also appears to be a standard fitment on some cars. The parts book shows it as a 4 blade fan with perhaps an aluminum center with plastic blades riveted to it. This fan uses a different hub extension, pt no. 142121 and rounded hex head center bolt, pt no. HB1349.</div><div><br></div><div>My TR4A is an early one that came to me with the 8 blade yellow TR250 fan when I bought it in 1982. The hub extension and hex bolt I have appears to be correct for the above plastic fan application compared to the illustrations in the parts book.</div><div><br></div><div>All three bolts are NLS now. I have several of the TR4 bolts and 2 of the hex head bolts. I have never seen the 12 sided bolt.</div><div><br></div><div>A hex head is on Ebay right now fairly cheap! Someone is asking big money for a TR4 bolt as well...</div><div><br></div><div>Never a cooling issue with that fan...well, except when the water pump shaft broke and tossed the pulley into the radiator core!</div><div><br></div><div>Cheers,</div><div><br></div><div><br>Brad</div>
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