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Old 02-05-2018, 11:12 AM   #1
Mini-Skoolie
 
Join Date: Dec 2017
Location: Portsmouth, England
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Year: 1983
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Am I being blind?! Bump stops?

Hey,

Back again, still on the issue of my steering box , decided to get one shipped over from the states, as the output shaft is too damaged to hold a good enough seal!

However before installing my new steering box. I’m struggling to see any form of bump stop/steering stop?

Ie- a threaded bolt that can be adjusted or preset to stop the wheels going full lock and eventually damaging the steering box (which is what happened to us!)

Allowing the gearbox to burst an end cap!


I’ve uploaded some pictures of the steering on our bus (yes it’s a right hand drive U.K version before you ask!)

Would anyone be able to clarify if there bus has stops? Or any reason the bus wouldn’t?


Thanks again chaps!

[IMG]http://www.skoolie.net/forums/members/21148-albums1383-picture18126.html[IMG]

[IMG]http://www.skoolie.net/forums/members/21148-albums1383-picture18125.html[IMG]

[IMG]http://www.skoolie.net/forums/members/21148-albums1383-picture18124.html[IMG]
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Old 02-05-2018, 11:14 AM   #2
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Old 02-05-2018, 11:14 AM   #3
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111.jpeg

112.jpeg

113.jpeg
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Old 02-05-2018, 11:17 AM   #4
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Thanks rusty! Struggle to use my phone whilst uploading!
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Old 02-05-2018, 11:33 AM   #5
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Wish I could help more, but someone should be along shortly.
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Old 02-05-2018, 04:56 PM   #6
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Yes, you should have bump stops. I see the pad in the first picture but you have the actual stop off the edge of the picture. It should be above the king pin bearing. You'll have a stop on one side and the other stop on the other side.
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Old 02-05-2018, 05:03 PM   #7
Mini-Skoolie
 
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Great thanks for the reply, is it that black circle on the right hand side of the first photo at the edge? I’ll have to have a better look this week
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Old 02-05-2018, 05:03 PM   #8
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Old 02-05-2018, 05:05 PM   #9
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It will be a square nub on the axle. The adjuster, which is nothing more then a bolt and a jam nut will be on the steering knuckle.
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Old 02-05-2018, 05:51 PM   #10
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Thank you so much! Have a great day
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Old 02-12-2018, 04:07 AM   #11
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Booyah I had a quick look yesterday and all I could really see was this knuckle type lump which appears it may be the bump stop? Annoyingly couldn’t see any form of adjustable bolt or screw.

I need to find a decent way of limiting the turning circle so I don’t damage another steering box, I’m thinking about welding a nut or piece of 10mm block to the pad and going from there? Any other ideas?



Thanks!!
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Old 02-12-2018, 04:11 AM   #12
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Old 02-12-2018, 08:36 AM   #13
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I would check that your tie rods are properly adjusted, I mean if the steering is capable of going far enough to damage the steering box then I would think the box was not centered properly as it should have enough travel to hit the stop before damaging the steering box, if the steering box was a full revolution off center, and someone adjusted the tie rods to compensate then it would be able to go too far one way and the steering box could overtravel before hitting the stop.
note: I don't know the steering setup on your bus this is just a thought.

if you look at the tie rods and one seems longer than the other this may be the issue.

a pic of the entire steering gear may help.
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Old 02-12-2018, 10:14 AM   #14
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I can't see how the steering stop could possibly have caused your gearbox problem. I've never found a reason to change one, some axles don't have an adjustable one. The stop is used mostly to keep the tires from rubbing at full turn. I would think the problem is more likely in the pump pressure relief.

From my Meritor repair manual

Quote:
Caution
In power steering systems, the hydraulic
pressure should relieve or "drop off" at the
end of the steering stroke (with 1/8 inch or 3
mm minimum clearance at the stop bolt). If
the pressure does not relieve, the
components of the front axle will be
damaged.
Not sure this will work this should be a link to the manual, stop info starts on page 37. This is for a Meritor axle but, most heavy duty axles are similar.
https://drive.google.com/file/d/1kRg...ew?usp=sharing
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Old 02-12-2018, 10:27 AM   #15
Mini-Skoolie
 
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Thanks for the replies, yeah it happened when I was turning full lock right and I could hear it whining in the power steering then suddenly burst the end cap,

http://www.skoolie.net/forums/f37/cr...box-20470.html

however in a Saginaw manual it says to not hold it for longer than 5 seconds to avoid damage and a few Skoolie people said I shouldn’t of either. but I was unaware of this and I was thinking of just installing a mechanical means of stopping it ever getting that close now :/

Amazed it would of left the factory like that though
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Old 02-12-2018, 11:12 AM   #16
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That's the stop. Check in the same area on the back side of the axle to see if the adjuster is there. I, however, feel that the adjustment isn't the issue.

I'm thinking either the old box was fatigued and cracked, or your pressure relief in the pump is stuck closed. Most gear boxes will have additional travel and are able to go pass the bump stops, and the bump stops are only there to prevent tire rub.

I wouldn't weld anything on the steering knuckle, thats a thick piece and you won't get a good weld if you do try. If I had to do anything, I'd drill and tap that pad in the knuckle for a bolt. However, the adjuster should be on the backside of the axle(mine is). Where as your pictures are all taken from the front.
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Old 02-12-2018, 11:14 AM   #17
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Quote:
Originally Posted by pbeggs View Post
I would check that your tie rods are properly adjusted, I mean if the steering is capable of going far enough to damage the steering box then I would think the box was not centered properly as it should have enough travel to hit the stop before damaging the steering box, if the steering box was a full revolution off center, and someone adjusted the tie rods to compensate then it would be able to go too far one way and the steering box could overtravel before hitting the stop.
note: I don't know the steering setup on your bus this is just a thought.

if you look at the tie rods and one seems longer than the other this may be the issue.

a pic of the entire steering gear may help.
You're thinking of a rack and pinion setup. With this type of setup, the tie rod only connects the left and right side together. The drag link is what would have to be out of adjustment for what you describe to happen. Unless the total toe is way out but you could see that at the tires if that was the case.
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Old 02-12-2018, 01:46 PM   #18
Mini-Skoolie
 
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Thanks for all the prompt replies! Im embarrassed to say that i have in fact found them! i was being stupid more so than blind. The adjustable stops were the other side of the knuckle/joint!

[IMG][/IMG]


Was covered under a ton of muck, will give them a good clean and have a look this weekend.
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Old 02-12-2018, 04:41 PM   #19
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I will say again that stop IS NOT your problem. Moving it will only make your turning radius bigger or smaller.
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Old 02-12-2018, 04:55 PM   #20
Mini-Skoolie
 
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Quote:
Originally Posted by somewhereinusa View Post
I will say again that stop IS NOT your problem. Moving it will only make your turning radius bigger or smaller.
I think you will still be right, initially I was thinking of a valve of some sort, I will see if I can locate the valve in the back of the pump, and see what’s up with it, I also read they stick and need cleaning up and inspecting, similar issues on corvettes I’ve read too..

I tried the google link above but didn’t appear to work.

I’ve reeuested access to see it, not sure if it has come through!

Thanks again
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