Vacuum leak?
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Vacuum leak?
Replaced my other locking hub and don't think it's going into 4x4 when I turn the switch. I here a click when I turn the **** BUT heat immediately goes to defrost. I'm afraid of where I need to look give the recent work I've done. Any thoughts.
Lead Driver
Joined: May 2014
Posts: 6,545
Likes: 13
From: Virginia Beach VA
Pull the line off at the wheel well and vacuum the hose to the hub. At least will tell you if it's a hub or hose/pump issue.
Three things in the wheel, o-ring on the hub or o-ring on the wheel bearing and the axle seal, really all there is. Special tool for axle seals, $70 for the seal and may e rent the tool or o-rings at $10 each. About 30-45 minutes for an axle seal with the right tools. No sweet job.
Three things in the wheel, o-ring on the hub or o-ring on the wheel bearing and the axle seal, really all there is. Special tool for axle seals, $70 for the seal and may e rent the tool or o-rings at $10 each. About 30-45 minutes for an axle seal with the right tools. No sweet job.
Thread Starter
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Pull the line off at the wheel well and vacuum the hose to the hub. At least will tell you if it's a hub or hose/pump issue.
Three things in the wheel, o-ring on the hub or o-ring on the wheel bearing and the axle seal, really all there is. Special tool for axle seals, $70 for the seal and may e rent the tool or o-rings at $10 each. About 30-45 minutes for an axle seal with the right tools. No sweet job.
Three things in the wheel, o-ring on the hub or o-ring on the wheel bearing and the axle seal, really all there is. Special tool for axle seals, $70 for the seal and may e rent the tool or o-rings at $10 each. About 30-45 minutes for an axle seal with the right tools. No sweet job.
Could you hook a vacuum tester to the knuckle port and see if a vacuum be pulled and if it does the seals are good?
Strokin Okie
Joined: Apr 2004
Posts: 1,883
Likes: 21
From: Oklahoma
See if this video will at least help you isolate the leak. If it was good before the work I would bet it's something at the hubs. My brother inadvertently boogered up the yellow o-ring when he replaced all his front end parts...
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Let me know how you make out on this, I can walk you through step by steps pretty easy. I had a vacuum pump issue once, replaced it, had a hose set from pump to the tank to replace, had the seals done, ball joints, the hoses down to each wheel also come off, fail as well. Also had to buy a new 4*4 vacuum control valve, just would hold vacuum the little rubber seals were dry and loosing vacuum to fast, pump was working hard. I currently am locking hubs manually and have the vacuum pump routed to just the HVAC as I am always in 4*4 these days.
Thread Starter
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Vacuum leak?
Let me know how you make out on this, I can walk you through step by steps pretty easy. I had a vacuum pump issue once, replaced it, had a hose set from pump to the tank to replace, had the seals done, ball joints, the hoses down to each wheel also come off, fail as well. Also had to buy a new 4*4 vacuum control valve, just would hold vacuum the little rubber seals were dry and loosing vacuum to fast, pump was working hard. I currently am locking hubs manually and have the vacuum pump routed to just the HVAC as I am always in 4*4 these days.
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Didn't have time to fully trouble shoot but a couple of things this morning.
Pump did turn off after it's normal run with KOEO--now I didn't have the 4x4 turned on (didn't think of that) turned the 4x4 on and pulling out of the yard I turned the wheel almost to the lock and didn't get any bind so figured the hubs weren't locked. On the highway almost to work I turned the 4x4 on and felt the normal clunk and heater did not revert to defrost.
Pump did turn off after it's normal run with KOEO--now I didn't have the 4x4 turned on (didn't think of that) turned the 4x4 on and pulling out of the yard I turned the wheel almost to the lock and didn't get any bind so figured the hubs weren't locked. On the highway almost to work I turned the 4x4 on and felt the normal clunk and heater did not revert to defrost.
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Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Well, maybe just needed to sure set things and it is working. First place I check is the hose on the heater line above the turbo, it does come off if you bump it. S cond place is on the axle below the tank, the hose going to the passenger side knuckle has a break in it where it goes through a bracket and is tied together with a barbed tube. Mine has opened several times, just needs to be put back together. Hopefully that is it for you.
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Well veified this evening......all is well. 4x4 works in auto and no default to defrost. I did change the passenger side locking hub last night but it still defaulted. Didn't do a thing extra today but it all worked fine. I guess things just had to get settled after the new seals and such??? Seems strange but I'll take it.
Strokin Okie
Joined: Apr 2004
Posts: 1,883
Likes: 21
From: Oklahoma
My truck did the same thing after all the work I did. I broke the hoses at the reservoir. After replacing the hoses, It took a couple of times putting it in and taking it out of 4x4 before it started working properly.
Glad it's working tho...
Glad it's working tho...
Thread Starter
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Logistics Pro
Joined: Feb 2013
Posts: 4,073
Likes: 5
From: TX
Whew...makes me feel better about it. I guess it needs a vacuum pulled a fewmtimes to set everything. Thanks I'm glad too. Nothing worse then doing alotmof work and getting something wrong or messing up something because of it.
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