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  #11  
Old 04-11-2015, 12:59 PM
Tomstadler88 Tomstadler88 is offline
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Originally Posted by R Bedell View Post
Your situation will most likely be, the Spirol Pin failure or a plugged Hydro Filter. Either will cause a lack of fluid to travel throughout the Sundstrand Hydraulic Unit.
ok so here's an update; changed the fluid and the filter.... nothing. spirol pin(s) are intact and the pump has power. pulled the plate off the differential, looks good. pulled the valves (at least i think they are valves) off the top of the pump as i hear these can get gunked up but they are spotless.

still no power to rear diff.

what's next?
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  #12  
Old 04-11-2015, 01:02 PM
R Bedell R Bedell is offline
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Go to this link. Down load the Service Manual. Look at page 2-93 and perform the Charge Pump Pressure test. Tell us what you find..... Service Manual
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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

[SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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  #13  
Old 04-11-2015, 03:16 PM
Tomstadler88 Tomstadler88 is offline
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Originally Posted by R Bedell View Post
Go to this link. Down load the Service Manual. Look at page 2-93 and perform the Charge Pump Pressure test. Tell us what you find..... Service Manual


- pressure test yielded about 95 psi @ idle
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  #14  
Old 04-12-2015, 12:27 AM
J-Mech J-Mech is offline
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Even at 95 PSI it should work. More than likely the charge relief valves (the big ones that you are holding in the pics) are stuck. Could be a charge pump issue, but more likely the valves.

Did you try moving the lever with the gauge installed? If so, what did it read then?
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  #15  
Old 04-12-2015, 01:42 PM
Tomstadler88 Tomstadler88 is offline
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Originally Posted by J-Mech View Post
Even at 95 PSI it should work. More than likely the charge relief valves (the big ones that you are holding in the pics) are stuck. Could be a charge pump issue, but more likely the valves.

Did you try moving the lever with the gauge installed? If so, what did it read then?
The pressure would drop to about 70 psi or so with the lever engaged and would be 'jumping'

I'm starting to think this is a charge relief valve problem... Are the ball bearings in the valve supposed to be freed up? They were rock solid. How can I diagnose a bad valve problem?
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  #16  
Old 04-12-2015, 02:18 PM
R Bedell R Bedell is offline
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Are the ball bearings in the valve supposed to be freed up?
YES, there is to be "free travel" of that steel ball inside the valve.

Quote:
They were rock solid.
There is your problem. You have three choices:

(A) Soak the valve(s) in a solution (ie: PB Blaster) and get the steel ball to travel freely.
(B) Send the valves into someone for rebuild.
(C) Buy new valves.
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  #17  
Old 04-13-2015, 12:10 AM
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johns cubs johns cubs is offline
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Try soaking in kerosene, or some brake fluid should do it.
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  #18  
Old 04-13-2015, 12:42 AM
J-Mech J-Mech is offline
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Try soaking in kerosene, or some brake fluid should do it.
Brake fluid? Explain that one....
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  #19  
Old 04-13-2015, 12:27 PM
Tomstadler88 Tomstadler88 is offline
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Yup I think we're on to something... I will play around with it this afternoon and update after. Fingers crossed! I don't want to buy new ones that's for sure
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  #20  
Old 04-13-2015, 08:41 PM
Tomstadler88 Tomstadler88 is offline
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Good news everyone!!

Soaked those suckers in some PB blaster and gave them a few taps in the floor- good as new. Installed them and the thing runs great. Thanks to everyone who helped me out on this one. Glad to give this buggy a second chance. Great first experience on the forum!

Ill post some pics tomorrow
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