1 pwr steering 2 vac leak (1 Viewer)

[jblueridge]

I finally got my BJ74 put back together. It had sat so long waiting for the rebuilt power steering pump and box to be finished that the parking brake cable was rusted/locked on.
When I install the rebuilt pump, I turned the wheel back and forth from lock to lock until the foaming stopped. I did not have the steering arm on at that point. Now with the steering arm reconnected, the pump seems to work properly as long as the rpm is above maybe 1,000 rpm. Below 1,000 I have no power assist.
Would air in the system adversely affect steering at low rpm only? I fear the folks who needed many weeks to rebuild my steering pump and box may have bungled things.


Totally unrelated ( think) I have a vacuum leak: brake dash warning light stays on and when I turn off the engine there is a delay of about 10 seconds before it actually stops.
Best method to trace leak?

 

[roscoFJ73]

When I have ever had a power steering pump repaired or refilled, it has self bled and built pressure almost immediately. Maybe it needs some resistance to function properly. Failing that ,I would get it bench tested.
The PS pump off my 3F had done 270000klm and the shop told me it was barely making enough pressure ,but it worked fine on my 73 series.

 

[jblueridge]

Roscoe, the sorry state of the U.S. economy 'round here has killed off the sort of mechanics shop that could do a bench test.
I'll have to make a bunch of calls I guess.
I'm hoping it will magically work properly when I drive it next.

 

[roscoFJ73]

A hydraulic specialist would have the gear.

 

[jblueridge]

We have 2 Walmarts, about a dozen discount mattress stores and a high-dollar movie theater were you can drink booze while you watch.
No hydraulic shop.

 

[jblueridge]

I won't have time to do anything until Friday or Saturday.

Still hoping to get some clues from y'all here on MUD.

 

[jblueridge]

So....
West Texas Off Road got my steering box sorted. Including the transit time, the whole deal required about 12 days.

Vacuum leak is almost certainly in the hard line that runs from near the vac pump, around the back of the motor to the VSV. I can't get at it wthout taking a lot of stuff out of the engine bay.
I'll run a re-routed line that may or may not become a permanent fix.

For now, the faulty vac line is working like a turbo timer set for 10 seconds run time.