Power Steering Hammering New Pump (1 Viewer)

[landtoy80]

My rebuilt pump was making a hammering or ticking noise. Assuming it was the old pump, I order a brand new power steering pump. Its making the same noise.

I took the pump off and the noise goes away. The gear for the pump looks good, there is just a tiny bit of play nothing more than gear lash.

Any idea what would make the noise?
Could it be the new pump???

If there is air in the system would it make a hammering noise?

I filled the reservoir turned the wheel back and forth till I could not add any more oil.
Started it and turn it off, filled and turned the wheel with motor off. Did this till there were no more bubbles and could add no more oil.

 

[Pin_Head]

Air in the pump makes strange noises, but I'm not sure I would call it hammering. Check the fluid level with the engine running and 5 minutes after you shut it off. If the fluid level rises after you shut it off, there is still air somewhere in the system.

 

[landtoy80]

It could be a ticking noise.
From one post they said the pump gear was making the noise.

I found this.
"I might have experienced this exact issue, too. I had my freind who is a certified master mechanic for Toyota (day job) do a radiator replacement on my 94 80 and in the process, the power steering pump was removed because it was leaking. After rebuild and upon reinstallation, we had a very pronounced ticking/knocking at idle that we could not hear with engine revs because (we think) the engine noise drowned it out. So, we installed a brand new pump after three gear/piump remove/reinstall gyrations. And it was still there (with the original gear being used), which left only the gear. After installing the new $100 gear, it went away. Before you buy another pump, remove the unit, use a mirror and look at the condition of the drive gear in the housing on the front of the motor, and of course check the pump gear for any imperfections. We could not find any but the new gear solved the issue. Hope that is worth something to you. Regards, Kirk

And this,
"If this is a series FZJ80 we are talking about, on the front of the block is where the drive gear is. It is either a gear on the crank or driven within the group of gears that turn the camshaft, etc all being driven by the crank gear - I have't had that cover off so I don't know the exact configuration of what is under that cover. With the drive gear inside that front cover, you can look into the mounting hole for the pump via a mirror as long as you have someone to turn over the engine by hand to rotate the gear for observation. Make sure there is no damage to the drive gear before mating it to a new driven gear (on the pump itself) if that is the path you choose like we did. For whatever reason, we found no damage to either the drive gear or the driven gear, but once we replaced the driven gear (installed it just lilke we had the original gear three times prior) the noise was gone. Go figure."


I looked at the gear and didn't see anything wrong with it.

I see several posts saying there is a ticking noise after replacing the pump.

 

[landtoy80]

When I have the motor running with the reservoir cap off and fluid at cold level, the fluid rises up into the neck of the reservoir.
The FSM says "Check that fluid oil reservoir is not foamy (mine is not) or cloudy (mine is not) and does not rise over the maximum when the engine is stopped (mine does).
Measure the fluid level with the engine running. Stop the engine and measure the fluid level.
SR-24 #4 says fill oil reservoir tank with fresh fluid, #5 With return hose off, run motor 1 to 2 sec and turn off engine. Fill and run till no air in oil. Did that.
I then bleed the system.

 

[Pin_Head]

Did that.
I then bleed the system.

???

Sounds like there is still air in the system. Turn the wheels back and forth with the wheels off the ground and check again. You could just run it. The air will eventually find its way out. Keep the reservoir topped up.

 

[landtoy80]

Air in the pump makes strange noises, but I'm not sure I would call it hammering. Check the fluid level with the engine running and 5 minutes after you shut it off. If the fluid level rises after you shut it off, there is still air somewhere in the system.

How do I measure the level when running, the fluid is rising up in the reservoir.
Does this mean there is still air in the system?
Should the oil in the reservoir rise up like a fountain when the motor is running? Should it rise at all when the motor is running?

 

[Pin_Head]

Yes, if the fluid level rises when you shut it off, there is air in the system.

There is a little dip stick in the cap to check the level. Fill it with it running until you get the level on the mark of the dip stick.

 

[landtoy80]

Thats the problem, when the motor is running the oil rises up and almost out of the reservoir.
I assume it should not do that when the motor is running???

 

[Pin_Head]

There may be some turbulence, but it shouldn't shoot out of the reservoir.

 

[landtoy80]

If I over steer, I can get the reservoir not to rise up, its calm with its over steered.
When the oil level is at the mid cold level and i run the motor it rises up like there is too much return pressure. It rises up past the lip in the reservoir.
The pump does all the pressure regulating doesn't it? Does the steering box do anything?

I bleed the crap out of the system. I removed the return line and ran at least 2 or 3 gal of atf through it. Took it for a ride and its louder than the rebuilt pump.
The noise sound almost like when the blades of a fan run on the housing, guard or shroud. Ad a ticking noise to that. It quiets when I over steer but doesn't go away.
Its loud enough to hear it echo off the houses when I drove down the block.

My next test will be to install the old pump with the inside parts removed. It will be just the gear, bearing and shaft.
That will rule out the gear if it doesn't make a noise when I start it.

 

[Pin_Head]

Did you switch the inlet and outlet hoses on the box? I don't know that this is possible on an 80, but it can cause problems. Fluid normally recycles as it is always pumping even when you are not turning.

 

[landtoy80]

I thought that to but if the FSM pic is correct I have it the same way.
The pressure side is on fender side and return is toward the motor.

 

[landtoy80]

It must be the gear on the pump. I put the gear on the old pump. I took out the guts of the pump so there was only the gear, shaft and bearing. Ran the motor and the noise was still there. Took the pump off and there were marks on the gear from the vice. I Dremeled off the marks and ran again. Less noise. Its amazing how such small marks can cause so much noise. It must of been the noise of the scratching of the burs on the pupm gear rubbing on the drive gear.

I will get a new gear. I guess thats what happened to the other guys when they replaced the gear and the noise goes away.

I will wrap the gear with a rubber strap when I torque the nut on the new one.
Don't just stick it in the vice, use a rubber, its safer!

 

[Pin_Head]

Congrats. The noise you described just didn't sound like air in the pump. When the pump is cavitating, it makes more like a moaning noise.

 

[RedTacoma]

Hey Landtoy80 I have the same problem with ticking knock noise, so did a new gear solve your ticking problem ... ???

 

[landtoy80]

The new gear is nice and quiet as is the new pump.

 

[winstonclein]

Does someone knows P/N for the PS Pump Gear?
Thanks.

 

[jfz80]

Im sure if you called one of the vendors they could tell you. Cdan, any of the supporting dealerships, etc.

but before you buy a new one Id suggest removing and reinstalling it. Sometimes the key doesnt seat well and therefore the gear is not seated all the way down on the shaft and causes the ticking. From this thread you can use the measurements to compare.

Hmmm ok so measurements seem to be gone or Im recalling wrong thread from concretejungles experience. He had a measurement of the face of the gear off the pump surface. If you press it too far in or not far enough it will tick. If you press it too far on , it expands the gear and necessitiates a new one.

https://forum.ih8mud.com/showpost.php?p=6373679&postcount=44

 

[winstonclein]

I have uninstalled it three times already, and the knocking don't disappear. I have installed it as FSM, as it was previously; and then as concretejungle suggested. So, my last shot is to change pump gear I think. But I need the p/n to order it. And also, I changed key for a new one since I screwed old one though at that moment I didn't think about the gear yet.
Thanks for the suggestion though.

 

[Sc0-]

I rebuilt two power steering pumps, and both made the ticking noise after reinstalling them in the trucks. Both noises eventually went away, one took a day and the other took a week. Even with the tick noise the power steering was working fine... (replaced the sealed shaft bearings in both as well)