M1078A1 "Pandora" Build | 2024-??? | ***Picture Heavy***

[Lostchain]

You could buy a STE/ICE kit so you can perform the hydraulic tests required by the TM…..?

US ARMY INTERCONNECTING BOX, ICE, DEARBORN PROTOCOL III PLUS , DATA BUS KIT | eBay

DEARBOARN PROTOCOL III PLUS. INTECONNECTING BOX, ICE. REALLY NICE CONDITION, LOOKS LIKE MOST OF IT HAS NEVER BEEN USED.

www.ebay.com

 

[flyfishtrailer]

Your pump and the hand pump need to be rebuilt. There are several write ups in here on both. 20 + year old seals have gone bad. I know Colt did a video on rebuilding the pump, and I am sure there are also probably videos of rebuilding (or replacing) the hand pump. Have you checked the fluid levels in the pump reservoir?

 

[Ronmar]

F=MA… Oops wrong formula

PSI X piston surface area = force… You have to build enough pressure to lift the cab, ~ 1500PSI to be exact for a typical cab. Your pumps are obviously having issues doing that, or fluid is leaking from supply to return preventing full pressure Buildup. so as mentioned rebuild them. When y0u checked fluid level, did you check the hand pump/ it has a filler in the left front corner when facing the pump. The valving is supposed to keep it full, but that may not be functioning properly. Oil around the pump shaft is not a good sign though… The fact it opens the latch and lifts a little and that you were able to help it lift says it is making some pressure, just insufficient to do it unassisted.

 

[aw113sgte]

You could buy a STE/ICE kit so you can perform the hydraulic tests required by the TM…..?

US ARMY INTERCONNECTING BOX, ICE, DEARBORN PROTOCOL III PLUS , DATA BUS KIT | eBay

DEARBOARN PROTOCOL III PLUS. INTECONNECTING BOX, ICE. REALLY NICE CONDITION, LOOKS LIKE MOST OF IT HAS NEVER BEEN USED.

www.ebay.com

Pretty much useless without the software to interface with it, which so far seems to be unobtainable for this generation of kit

 

[InvictusDecretum]

You could buy a STE/ICE kit so you can perform the hydraulic tests required by the TM…..?

US ARMY INTERCONNECTING BOX, ICE, DEARBORN PROTOCOL III PLUS , DATA BUS KIT | eBay

DEARBOARN PROTOCOL III PLUS. INTECONNECTING BOX, ICE. REALLY NICE CONDITION, LOOKS LIKE MOST OF IT HAS NEVER BEEN USED.

www.ebay.com

I have looked at buying one since I imagine I'll be doing many diagnostics on the truck but based on these forums, the software is the hard piece to find (along with the $600+ pricetag).

 

[InvictusDecretum]

Your pump and the hand pump need to be rebuilt. There are several write ups in here on both. 20 + year old seals have gone bad. I know Colt did a video on rebuilding the pump, and I am sure there are also probably videos of rebuilding (or replacing) the hand pump. Have you checked the fluid levels in the pump reservoir?

Thanks, makes sense the seals are toast. Sudden seal failure at these pressures is definitely possible, just wasn't sure that was the cause. I'll go the 2x pump rebuild route. Just finished reading this thread, found Colt and Fastidioud rebuild videos, and while the individual seals, u cup, and poly washer are "obsolete" from MRO, the full kit that Colt used was available so I ordered that.

FMTV Air Hydraulic Unit Repair

Crud. Looks like I need to rebuild mine. Lowering the cab trying to get the cab lock pin to retract and all I'm seeing are clouds of mist coming out of the unit. It's not too hard to do. Gotta have a clean work area and don't put the new gasket in backwards

www.steelsoldiers.com

F=MA… Oops wrong formula

PSI X piston surface area = force… You have to build enough pressure to lift the cab, ~ 1500PSI to be exact for a typical cab. Your pumps are obviously having issues doing that, or fluid is leaking from supply to return preventing full pressure Buildup. so as mentioned rebuild them. When y0u checked fluid level, did you check the hand pump/ it has a filler in the left front corner when facing the pump. The valving is supposed to keep it full, but that may not be functioning properly. Oil around the pump shaft is not a good sign though… The fact it opens the latch and lifts a little and that you were able to help it lift says it is making some pressure, just insufficient to do it unassisted.

Thanks for the explanation and confirmation RonMar. Your knowledge of the trucks and their systems is impressive. I've ordered an A/HPU rebuild kit (SPX P/N 300140) and 2x "exact fit replacement" washers for the now obsolete SPX P/N 17429 (SPX P/N HDT 17429)

I did consider an electric pump that met gpm and pressure specs you listed or that neat double action hand pump youre using in the rebuild thread, but Im not prepared to commit to that right now. Only so much money/time for research, learning, and doing and in this instance would rather rebuild the existing system in the interest of expedience.

 

[GeneralDisorder]

I have looked at buying one since I imagine I'll be doing many diagnostics on the truck but based on these forums, the software is the hard piece to find (along with the $600+ pricetag).

The software is no problem. Send me a thumb drive.

 

[Lostchain]

I have looked at buying one since I imagine I'll be doing many diagnostics on the truck but based on these forums, the software is the hard piece to find (along with the $600+ pricetag).

You absolutely need one of these for an A1, the DPA3 lets you interface with all the computerized systems on the truck. Software is available if you ask on the forum nicely. As far as the price goes, sometimes sellers will offer a lower price if you have it on your watch list. Also there is another seller on eBay selling a nice one for “make an offer” so you could go that route.

If this saves you one trip to CAT to read codes you’ve likely paid for it.

 

[Lostchain]

Pretty much useless without the software to interface with it, which so far seems to be unobtainable for this generation of kit

Fake News, software is available see @GeneralDisorder statement above. In my personal opinion this is the better kit because all the implements are wired. I have this one and a newer Spiral Two and this is the one I go to.

 

[InvictusDecretum]

You absolutely need one of these for an A1, the DPA3 lets you interface with all the computerized systems on the truck. Software is available if you ask on the forum nicely. As far as the price goes, sometimes sellers will offer a lower price if you have it on your watch list. Also there is another seller on eBay selling a nice one for “make an offer” so you could go that route.

If this saves you one trip to CAT to read codes you’ve likely paid for it.

Well, you and general disorder convinced me... time to eat Ramen for a month !

 

[Lostchain]

Yeah that hurts, but not much on these trucks is cheap unfortunately. First time you program your CTIS or CAT ECM on your own you'll feel pretty good about yourself. I think @GeneralDisorder can even make you up a nice diag laptop with all the software preloaded if you aren't a techie.

 

[Lostchain]

Also to power the interconnection box, which is what all the analog test pieces hook to, you will need this cable to get 24 volts from the slave port on the truck. You’ll need this to power up the hydraulic pressure sensor needed for the test #51 mentioned in the TM above. Normally that box is powered up by the diag laptop that originally came with this ICE kit.

MILITARY MILTOPE MSD V2 LAPTOP 24V NATO SLAVE PORT POWER CABLE BATTERY CHARGER | eBay

24v nato port power cable for the msd v2. Approx 30 feet long. Power your msd off the trucks single pin slave port. Hard to find part. In most situations you can buy a Square Trade warranty on the item for a small fee.

www.ebay.com