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I am in a Marine Corps unit that uses civilian H1 Hummers. We have had a recent problem with our PSD's. We recieved a relocation kit,#9 resistor, and heat sync kit. I had to fabricate a new bracket to mount on top of the AC compressor for the heatsync to...
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From: Corporal Vaughan R.
this PMD kit solved the problem with stalling,missing on hard accelleration,and failure to start on occassion.Walt was very helpful and replied to ALL my questions.All the dealer could say is "must be the pump".I'm going to bring the truck to them and ask...
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6.5TD C/K Trucks  >  Engines, Heads and Components  >  6.5TD HD Secondary Harmonic Balancer Assy (main pulley)

New HD Secondary Harmonic Balancer for all Serpentine belt drive 6.5's, all years.

6.5TD HD Secondary Harmonic Balancer Assy (main pulley)

6.5TD HD Secondary Harmonic Balancer Assy (main pulley)

Model: ssd-5231 $89.99
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Brand New HD Secondary Harmonic Balancer for all 6.5's with serpentine belt drive, all years, all vehicles.

If you have a rattle in the front of your engine, it may be the Secondary Harmonic Balancer. Inspect and if loose or showing signs of separating, replace it immediately. Harmonic balancers fail over time and will cause a crankshaft to break. If you have ever heard of a crank breaking on a 6.5, it can always be traced back to a bad balancer, not a bad crank.

The Secondary Harmonic Balancer includes the pulley as part of the outer ring of the balancer.

Engines require a harmonic balancer to absorb the harmonic vibration created by the reciprocating motion of the pistons and rods and rotation of the crankshaft. It is located on the front end of the crankshaft and the belt drive pulley attaches to it. If defective, the crank vibration will fail the crankshaft causing catastrophic failure of your engine. This outer secondary balancer is usually what fails first from age and wear. Also check the main harmonic balancer behind this balancer and replace also, if it shows signs of wear or separation. Its available in this category as p/n ssd-5328

 

6.5TD HD Secondary Harmonic Balancer Assy (main pulley)

 

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