Bleeding the hydroboost system? - Ford Powerstroke Diesel Forum
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post #1 of 17 Unread 08-22-2019, 01:34 PM Thread Starter
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Bleeding the hydroboost system?

Is this the correct method?

Jack the truck off the ground
While the truck isnt running...
turn lock to lock 5 times
pump brakes 3 times

Repeat 40 times?
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post #2 of 17 Unread 08-22-2019, 03:01 PM
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That is correct. It works, but yes, you literally need to pump it 40+ times. Initially I skimped out and paid for it - loads of air in my lines.

If your pedal is still spongy or almost has a springy feeling, you need to do it more.

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post #3 of 17 Unread 08-22-2019, 03:16 PM
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No that is NOT how it’s accomplished

I’m giving another two bits here.

Pull return hose off the hydro boost and get 6’ of 3/8” line. Connect it to boost and drop it ina 5 gal bucket.

Hope you have suction gun use it to empty p/s pump resivour.

Get 5 quarts of specd hydraulic oil and top off tank.

Need helper to keep pouring in fluid while you are in a RUNNING truck with wheels off ground and at a reasonable speed turning lock to lock. You will absolutely also need to press on brake pedal firmly intermittently to keep oil passing though the system into bucket.

That’s it I would use ALL 5 QUARTS for a flush to be proud of.
Last thing I put a filter on my return line forget name but it’s a magnetic filter that grabs any fine metal. Not restricted by mesh so it’s the one.

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Last edited by mhatlen; 08-22-2019 at 03:24 PM. Reason: Still can’t spell. Or do much of anything else 1/2 time
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post #4 of 17 Unread 08-22-2019, 03:26 PM Thread Starter
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I ran the entire system way to low and the steering seemed to be sticking...So I flushed a gallon of Merc LV tranny fluid through the reservoir and out into a bucket and that seemed to fix the problem for a few days, but now its back to acting up so Im hoping its just air in the line.

Is Merc LV the correct fluid?

My truck has a filter of some kind on the line, I was going to take it off and flush it out to make sure it was flowing.
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post #5 of 17 Unread 08-22-2019, 03:39 PM
Fuel it up again Dummy
 
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Mercon V is what is recommended. But they quit one of their hydraulic oils.
Hang on

2006 F250 LARIAT CCSB 4X4
6.0 Diesel w/80K 6/19

ARP Studs, O-Ringed Heads
Stage I KC Turbo 10V
DC Power 270XP Die Hards
6.4 Starter, BPD Waterpump
FASS 125 Titanium w/Adj. Press Reg
3” CAC Pipes & CSF 7106 I.C.
4” Diamond Eye SS Exh System
W/two 4” SS Diamond Eye mufflers.
IPR Coolant filter w/ Manifold
CAT EC-1 coolant
SCT X4 ECM Rollback & PHP Tunes
100HP Hercules & 65HP Tow Tune
Icon/Deaver Suspension
Toyo M/T 38/15.50/18
1,000lbs or more other crap too
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post #6 of 17 Unread 08-22-2019, 03:45 PM
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It’s out there Valvoline also has it.

I’m not one to ask if the LV is a proper option.
I just don’t see LV listed

2006 F250 LARIAT CCSB 4X4
6.0 Diesel w/80K 6/19

ARP Studs, O-Ringed Heads
Stage I KC Turbo 10V
DC Power 270XP Die Hards
6.4 Starter, BPD Waterpump
FASS 125 Titanium w/Adj. Press Reg
3” CAC Pipes & CSF 7106 I.C.
4” Diamond Eye SS Exh System
W/two 4” SS Diamond Eye mufflers.
IPR Coolant filter w/ Manifold
CAT EC-1 coolant
SCT X4 ECM Rollback & PHP Tunes
100HP Hercules & 65HP Tow Tune
Icon/Deaver Suspension
Toyo M/T 38/15.50/18
1,000lbs or more other crap too
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post #7 of 17 Unread 08-22-2019, 04:11 PM Thread Starter
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Thanks man. I was told it was updated to the LV, but I dont know for sure
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post #8 of 17 Unread 08-22-2019, 04:16 PM
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Wouldn't regular hydraulic oil work? Like Hy-Tran or Torque Guard -- or does it need to be synthetic?

In my defense, I was unsupervised
.
2006 F250 Lariat FX4 cclb
Torque Pro and OBDLink MX bluetooth monitor
General note:
For all those wanting a premium silicone sealer Kubota 70000-73764 is the best your gonna find. This is a hybrid gray silicone that uses solvent rather than acid to start the curing reaction, this makes it safe for aluminum and and any surface that involves coolant.
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post #9 of 17 Unread 08-22-2019, 04:56 PM
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mhatlen is correct, I neglected to mention the flush procedure.

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post #10 of 17 Unread 08-22-2019, 05:37 PM
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Interesting information

This is for Mercon V oil
Do not use in applications where MERCON® ULV, MERCON® SP, MERCON® LV, MERCON® ULV, Continuously Variable Chain Type Transmission Fluid, Motorcraft® Premium Automatic Transmission Fluid or Type F Automatic Transmission Fluid is recommended

This is for Mercon LV
Do not use in applications where MERCON® ULV, MERCON® V, MERCON® SP (exceptTorqShift®), Continuously Variable Chain Type Transmission Fluid, Motorcraft® Premium Automatic Transmission Fluid, FNR5 Automatic Transmission Fluid or Type F Automatic Transmission Fluid is recommended, or in power take-off units

This is for Valvoline
Valvoline ATF for MERCON V Applications
see the pic below
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In my defense, I was unsupervised
.
2006 F250 Lariat FX4 cclb
Torque Pro and OBDLink MX bluetooth monitor
General note:
For all those wanting a premium silicone sealer Kubota 70000-73764 is the best your gonna find. This is a hybrid gray silicone that uses solvent rather than acid to start the curing reaction, this makes it safe for aluminum and and any surface that involves coolant.
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