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Old 04-29-2014, 09:05 AM
raven3 raven3 is offline
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power steering bracket

Have a 1973 F250 , 390/C6/4.11

When bolting on the power steering adjusment bracket that fastens directly to the engine, noticed the pulley is offset about 3/4" from the crankshaft pulley.

Looks like the power steering unit is driven directly from the crankshaft pulley and no contact with fan pulley.

There are two sheeves on the crankshaft pulley, one for the fan and one for the power steering unit

This truck is a barn yard find and probably has been farmitized.

The fan pulley has only one sheeve that runs the alternator.
The alternator belt lines up perfectly.

This there supposed to be some major spacers between the power steering bracket and the two water pump casting mounting holes and one
engine block hole?
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Old 04-29-2014, 09:29 AM
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There were two different pulleys used, the difference is factory A/C vs. non-A/C.
The first two pictures are non-A/C, the third, factory A/C.
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Old 04-29-2014, 03:07 PM
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Quote:
Originally Posted by raven3 View Post
Have a 1973 F250 390/C6.

When bolting on the power steering bracket noticed the pulley is offset about 3/4" from the crankshaft pulley.

Looks like the power steering unit is driven directly from the crankshaft pulley and no contact with fan pulley.

There are two sheaves on the crankshaft pulley, one for the fan and one for the power steering unit.
There are two P/S pump mounting brackets, not one. 1973/76 F100/350 360/390: D3TZ-3C511-A .. P/S Pump Support Bracket & D1AZ-3A732-A .. P/S Pump Adjusting Bracket.

Harmonic balancer contains a single sheave pulley. FoMoCo offered single, double and triple sheave outer accessory pulleys that bolt to the balancer to add P/S, A/C, dual belt alternators.
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Old 04-29-2014, 05:23 PM
raven3 raven3 is offline
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The photos help a bunch.
Based on the photos, have a non A/C configuration.
with original equipment pulley on crankshaft.

With the non A/C configuration, there must be some power steering bracket spacers that are missing.

The exploded parts view does not show this much detail.
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Old 05-01-2014, 12:35 AM
raven3 raven3 is offline
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On the non A/C power steering bracket that bolts to the 390 engine.
The pulley configuration is:
1. fan pulley- one sheeve
2. alternator pulley- one sheeve
3. crankshaft pulley- two sheeves with space between the two sheeves.

Made two aluminum spacers 1" dia X .800" long that fit to the water pump and one aluminum spacer 1" dia X 1.150" long that fits against the engine block. The three spacers have 3/8" diameter through holes. The spacers were machined on a horizontal lathe.

As a result of using these spacers with grade 8 bolts, the power steering pulley has perfect alignment with the outer crankshaft sheeve.

Do not know if this setup is identical to the original factory setup,
since the power steering assembly was missing some OE parts.

The photos posted by mikeoOoOoO was a big help, since it established that the correct crankshaft pulley was installed on the engine.
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Old 05-01-2014, 08:53 AM
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Quote:
Originally Posted by raven3 View Post
The photos posted by mikeoOoOoO was a big help, since it established that the correct crankshaft pulley was installed on the engine.
Glad to see you got it fixed, thanks for the update.
Here's a clearer picture of the stock crankshaft pulley for a non-A/C truck with power steering.
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Old 05-01-2014, 09:10 AM
raven3 raven3 is offline
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Yep,
The photo of the crankshaft pulley with the space between forward and aft sheeves is identical to the one on my 73 F250.

This photo verifies that the original equipment crankshaft pulley is still on the truck and has not been swapped out.
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Old 05-01-2014, 09:10 AM
 
 
 
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