Ford 4500 TLB Transmission Pump?

[loopman]

Hi everyone,

Just after opinions on a transmission issue I am having with an old Ford 4500 industrial (loader/backhoe). It has the "Power Reversing Transmission" where you selct a gear and then operate via a foward/reverse lever on the dash - no clutch. From my understanding, the engine drives a flexplate which is attached to a torque converter, the Fwd/Rev selector then engage a set of clutches that then drive the standard 4-speed box. Machine was operating well, then stood for about 4 months, when I moved it out of the shed it backed up very sluggishly for about 30' and then stopped completely - no coaxing will get it to move in either direction now.

I have changed transmission oil, changed transmission filter, made sure disconnect lever on final drive is engaged but nothing. Looking through an inspection port underneath I can see the torque converter spinning so it doesn't appear to be a broken flex plate/connection issue.

What seems to be the issue as far as I can see is that when I remove the bolt from the oil pressure test port in that same panel underneath, I only see small spurts/dribbles of fluid coming out - so I am assuming the transmission hydraulic pump has failed? Is it normal for this to just fail, i.e. no prior warnings via slow operation when it was last used? Could it be anything else do you think? If it were the pump it looks like the tractor has to be split to get to this, a huge undertaking for both my experience level and workshop equipment available (no gantry etc.)

Interested to hear any thoughts about this problem,

Thank you.

 

[MEMEMEME]

Dang, loopman, you just don't seem to get very much response to your posts here sometimes. Not sure if it is because nobody knows much about Ford 4500's or what?

I am VERY interested to know more about this as I recently bought one of these beasts. So far she's been doing what I ask of her after a good set of filters/new fluids/brake rod seals etc. but I'd like to have knowledge about stuff like this should I have a problem down the road.

From your post here I learn that there is a separate transmission hydraulic pump in these shuttle trannys? Is there also a pickup filter screen which can get clogged and hinder machine movement forward/aft? If so, I'd like to find out where it is located and how to service it BEFORE I have an issue like yours-

Anyone??



Maybe someone will see this bump and offer some insight.