Dirtymilkman Posted June 3, 2014 Share Posted June 3, 2014 '96 CL713 has Shepard twin steering gear. One day while driving, driver lost power steering. Then a hour later it came back. It kept doing this so I took it in. They replaced bearing on steering shaft, steered fine. Next day, no power steering again. This time they replaced the pump, old one had no flow and low pressure. Now the truck steered very stiff, like your trying to run while in water....they now replaced driver side steering gear...then passenger side steering gear and another new pump! We're out of ideas and I'm running out of $! Lol. If you turn wheel to lock one way and then turn back its real hard to turn. We also replaced all hosed too and filter. And I only run ATF in them. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/ Share on other sites More sharing options...
gearhead204 Posted June 3, 2014 Share Posted June 3, 2014 did they build the hoses from areoquip or strataflex hose? if so its easy to screw up the inner rubber liner, I'd say flow test all new hoses it might be something stupid, or miss ported lines. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247848 Share on other sites More sharing options...
Dirtymilkman Posted June 3, 2014 Author Share Posted June 3, 2014 Hoses are aeroqip, same results with new and old hoses. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247861 Share on other sites More sharing options...
slpwlker Posted June 3, 2014 Share Posted June 3, 2014 Something that happened to me when we put the twin boxes on the Pete. left no problem right it would hit a wall then turn. ended up having air in the system. finally got it all out it doesn't have that hitch when right but still a stiff steering bastard. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247863 Share on other sites More sharing options...
Dirtymilkman Posted June 3, 2014 Author Share Posted June 3, 2014 It shouldn't be stiff, my other cl's are a 1 finger turner and this one was. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247865 Share on other sites More sharing options...
Mackpro Posted June 3, 2014 Share Posted June 3, 2014 Sheppard has their service manuals on line for free. Kinda hard to find them on there though. Im going with air in system or something floating around in resivore clogging supply to pump. I assume its a 92 series gear , the M series sometimes had places to bleed the air out. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247873 Share on other sites More sharing options...
slpwlker Posted June 3, 2014 Share Posted June 3, 2014 This definetly isn't a 1 finger turn and in a hurry the rpms better be up. Think the lines might be a tad small. but compared to what I had with a single box it turns the 425's Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247877 Share on other sites More sharing options...
Dirtymilkman Posted June 3, 2014 Author Share Posted June 3, 2014 We bled the hell outta this thing. Would air in the line make it turn stiff? We even tried with the filter in. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247884 Share on other sites More sharing options...
gearhead204 Posted June 3, 2014 Share Posted June 3, 2014 milk man how did they route the hoses? if they have loops or high arcs you could very well have trapped air in the hoses. its damn near impossible to force air down hill, and no more oil that is used between boxes vs. the length of hose this could be it. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247886 Share on other sites More sharing options...
Dirtymilkman Posted June 3, 2014 Author Share Posted June 3, 2014 Hoses are routed the same as factory. We did get some good slugs of air out but no help Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247904 Share on other sites More sharing options...
wheeler73 Posted June 4, 2014 Share Posted June 4, 2014 Were the gears properly bled and the internal stops set correctly? Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247939 Share on other sites More sharing options...
Dirtymilkman Posted June 4, 2014 Author Share Posted June 4, 2014 Supposedly it was done right. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247947 Share on other sites More sharing options...
KECorbin22 Posted June 4, 2014 Share Posted June 4, 2014 Method I have used several times is to jack up the front axle, get both wheels off the ground, slightly crack both pressure lines, without truck running, turn steering wheel in both directions a number of times, keep the tank full and this forces air out of system without the pump cavitying . close off lines while someone keeps turning the steering wheel. Hillbilly Method 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247949 Share on other sites More sharing options...
Dirtymilkman Posted June 4, 2014 Author Share Posted June 4, 2014 OK. That will be our next step. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247981 Share on other sites More sharing options...
41chevy Posted June 4, 2014 Share Posted June 4, 2014 Method I have used several times is to jack up the front axle, get both wheels off the ground, slightly crack both pressure lines, without truck running, turn steering wheel in both directions a number of times, keep the tank full and this forces air out of system without the pump cavitying . close off lines while someone keeps turning the steering wheel. Hillbilly MethodThis works best, just don't turn the wheel to fast. Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-247983 Share on other sites More sharing options...
mackmech Posted June 4, 2014 Share Posted June 4, 2014 ran into similar issue one time turned out steering shaft u joints were out of phase 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248012 Share on other sites More sharing options...
bobo Posted June 4, 2014 Share Posted June 4, 2014 get rid of the ATF, use 15/40 motor oil. thats what should be in there any way! bobo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248018 Share on other sites More sharing options...
theakerstwo Posted June 4, 2014 Share Posted June 4, 2014 I have seen a few ujoints freeze up and make you think for awhile.Also the king pins can freeze up or break and cause some problems. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248023 Share on other sites More sharing options...
gearhead204 Posted June 5, 2014 Share Posted June 5, 2014 steering shaft u joints need to be out of phase or the wheel will pulsate when turned. or so I was taught. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248051 Share on other sites More sharing options...
wheeler73 Posted June 5, 2014 Share Posted June 5, 2014 Are they sheppard or trw gears? There are different bleeding procedures for them. On the sheppard gears there is a bleed port. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248055 Share on other sites More sharing options...
Dirtymilkman Posted June 5, 2014 Author Share Posted June 5, 2014 They are Shepard gears. Everything is in phase, we've always used atf in them especially when it is -30 degrees. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248073 Share on other sites More sharing options...
wheeler73 Posted June 5, 2014 Share Posted June 5, 2014 Sheppard gears have a bleeder screw inside of a nut on top of the gear. You turn the steering full left and open the bleeder 3-4 turns and turn it to the right and close the bleeder and repeat untill no air comes out. I do this with the engine running. I have seen this cause many issues and have had other dealers miss this step. Also are you getting full turning lock to lock? The steering should stop about 1/4 inch from the steering stops. If not the boxes need to be adjusted if they have manual stops and if they have auto stops they need to be reset and the front wheels off of the ground and the steering turned lock to lock to set them. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248085 Share on other sites More sharing options...
wheeler73 Posted June 5, 2014 Share Posted June 5, 2014 Atf is fine. The only time I see issues with atf is if they had motor oil in them originally. That shouldn'd be as issue as everything is new. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248086 Share on other sites More sharing options...
Dirtymilkman Posted June 6, 2014 Author Share Posted June 6, 2014 So air in it would cause it to be stiff? Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248170 Share on other sites More sharing options...
wheeler73 Posted June 6, 2014 Share Posted June 6, 2014 Yes it can. Also it will turn to the left decent and then to the right hard. That is another symptom. The best way to determine is to install a flow test gauge and test each box. Quote Link to comment https://www.bigmacktrucks.com/topic/35949-power-steering-issuesout-of-ideas/#findComment-248171 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.