fbekholden.com

The Rare Spares harmonic balancers are a PowerBond unit. There are three distinct units available:

1. HB17BN - this is the "narrow belt" (11A metric automotive belt) balancer to suit the majority of grey motors (FE through EJ). It was redesigned by PowerBond to eliminate the central 1 1/8”-12 UNF thread cut in the centre bore to accept a puller tool, replacing it with three 3/8"-24 UNF holes on a 2 13/16” (71.44mm) PCD similar to the red/blue/black motor harmonic balancer.
2. HB1049N – identical to the balancer above, but designed for the "wide belt" (15A metric automotive belt) FX/FJ pulleys.
3. HB17AN – red motor balancer.

The two grey balancers are different centre bore to the red. No home-riveting needed on any of them - pull them off and tap them on in one piece, being wary not to butcher (or lose) the woodruff key.

Can you tell I've ben playing with supercharger pulleys lately ?

Cheers,
Harv

Correct. PowerBond Balancer. Part number is HB17B-N and box says FJ to EJ. The 11A fan belt fits nicely. I just needed confirmation that it was correct harmonic balancer as it was different and reading this thread I still wasn't sure.

Thanks for info that I don't need the special tool anymore so wont have to find one to borrow again.

fatboy66 wrote:the whole pulley is loose on the shaft. the only thing holding the assembly on the shaft is the fan belt it would appear. I reckon I can take it off with my hands once the belt is removed

've had the rivets wear and loosen the harmoninc. It may just need a few whacks with the hammer to tighten the pulley up on the the harmoninc balancer.