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'84 K10 The Animal- Now on Forty Two's

Adventure truck
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mrk5 said:
Just realized I didn't add this to my previous post. FWIW, I did -8AN on mine including the cooler from Howe. I also have -12 between the reservoir and pump - they make a pump can with -12 welded on. It's probably overkill.

Have you checked the ram isn't bent?

Any chance it could be too much pre-load on the king pins? I tried the spring eliminators but I thought they made the steering too stiff. I don't know what you're running in that regard and I'm too lazy to look back thru the thread.
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Mine is -10 on the feed and all -6 thereafter. Several trucks I know of have the same setup so I can't imagine this is the issue but I'll mention it to PSC.

I haven't looked to closely at the ram but it's pretty new and I've had similar problems with the other ram in the past (both PSC). I guess the king pins could be a factor however I don't see how that would cause some of the problems I'm having. If you can imagine driving down a narrow trail and you need to make a quick left turn and then an immediate quick right, the second motion (right) would have tons of resistance in the wheel. To the point where I have to stop because I cannot make the turn. In general I feel like there is a lack of "assist" over other trucks I've driven with the same or very similar parts but the inn-ability to turn two different directions back to back is the bigger concern.
 
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Smokinthehippies said:
That definitly seems like a problem in the gear telling which port to have hydro pressure quick enough.
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as if the ram is fighting the steering gear.....I guess I could disconnect the ram and set some cones up :thinking:

Back when I first got the assist installed and tried to bleed the system I had the assist lines backwards so when I tried to steer left the wheel would go right and visa versa (ram was over powering the steering gear). Before I could turn the truck off the hydro fluid blew back through the reservoir (cap was off) and all over my shop. After that I noticed the input seal on the steering box was leaking so I sent it back to WTO for a rebuild service.I had bought the WTO box used so that was probably a good thing anyway.
 
Does revving the motor make any difference? The other thing I would wonder about is the pump but I'm thinking you already replaced that - again I'm too lazy to check.

Might be worth checking how it works with the ram isolated from the system and also maybe with it just unbolted?
 
mrk5 said:
Does revving the motor make any difference? The other thing I would wonder about is the pump but I'm thinking you already replaced that - again I'm too lazy to check.

Might be worth checking how it works with the ram isolated from the system and also maybe with it just unbolted?
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The pump and the reservoir are brand new from PSC, this was the first trip on them. Reving the engine does not make a difference from what I can tell. Removing the ram is a good idea.....
 
skunked said:
The pump and the reservoir are brand new from PSC, this was the first trip on them. Reving the engine does not make a difference from what I can tell.
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That, to me, would be another indication for the steering gear. I've seen people have trouble with a sluggish ram and usually running the RPMs up helps because the pump is pushing a little more fluid.
 
skunked said:
Mine is -10 on the feed and all -6 thereafter. Several trucks I know of have the same setup so I can't imagine this is the issue but I'll mention it to PSC.

I haven't looked to closely at the ram but it's pretty new and I've had similar problems with the other ram in the past (both PSC). I guess the king pins could be a factor however I don't see how that would cause some of the problems I'm having. If you can imagine driving down a narrow trail and you need to make a quick left turn and then an immediate quick right, the second motion (right) would have tons of resistance in the wheel. To the point where I have to stop because I cannot make the turn. In general I feel like there is a lack of "assist" over other trucks I've driven with the same or very similar parts but the inn-ability to turn two different directions back to back is the bigger concern.
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This is exactly what mine was doing and it was a brand new PSC box along with everything else brand new PSC. It also did the same thing pulling out of my driveway or a parking lot on to the road sometimes. It wasn't terribly consistent though.
 
Maybe I am wrong, but to me, the slightly improved reaction with the increase in RPM says that the pump isn't moving enough fluid or the pressure is slightly low, or both.

Mine has a stock pressure line from the pump, and just 3/8" lines from the box return to cooler and back to reservoir. I have no problems with how it acts. @Bent77 set me up!! ( when he built the '72) :waytogo:
 
6872xtc said:
Maybe I am wrong, but to me, the slightly improved reaction with the increase in RPM says that the pump isn't moving enough fluid or the pressure is slightly low, or both.

Mine has a stock pressure line from the pump, and just 3/8" lines from the box return to cooler and back to reservoir. I have no problems with how it acts. @Bent77 set me up!! ( when he built the '72) :waytogo:
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RPM has no effect on the steering capability. I took it out yesterday to double check that before I call PSC again.
 
The PSC rep believes the pump is failing again and they're sending a replacement. I'm not very confident that two pumps have failed but it's possible I suppose.

Probably should pull the ram off and see how the system reacts without it before I swap the pump.
 
skunked said:
no doubt.
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I havent read all the way through here but can you get them to bench test it so you can rule out your end? Two in a row is sketchy from a company that's cornered the market for this stuff. I wonder if others are recently having the same problem?
 
wetoolowdingbangow said:
I havent read all the way through here but can you get them to bench test it so you can rule out your end? Two in a row is sketchy from a company that's cornered the market for this stuff. I wonder if others are recently having the same problem?
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i.e... quality control/out sourcing parts like the way Optima batteries went to shit.
 
wetoolowdingbangow said:
I havent read all the way through here but can you get them to bench test it so you can rule out your end? Two in a row is sketchy from a company that's cornered the market for this stuff. I wonder if others are recently having the same problem?
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I highly doubt they do anything with them, likely just scrap them for the write off. However they'll fix the pump @ $90 per hour......that's why I just bought a new one a couple months ago rather than have it fixed.

Truckman4life said:
i.e... quality control/out sourcing parts like the way Optima batteries went to shit.
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Probably Mexico, they're a Texas company :D
 
skunked said:
I highly doubt they do anything with them, likely just scrap them for the write off. However they'll fix the pump @ $90 per hour......that's why I just bought a new one a couple months ago rather than have it fixed.



Probably Mexico, they're a Texas company :D
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You're probably right. Can you rig your own bench test? Would be interesting to see what numbers it could hit out of the box and then in it's current state.
 
I would think that you would probably need to check flow, WHILE watching pressure. At least that's what I was taught about diagnosing slow hydraulic circuits.
 
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