Some random work pictures.

[OldandWorn]

We changed the tires, changed the pressures, put turf style tires on from a roller, removed front, then rear drive shaft, swapped rear diff and now swapped trans.

After all this, still the same problem. ??????

Our shop is just big enough to put a 775 with the bed pinned up. A bigger shop would be better but we can get by with what we have.

Has this problem been there since new? If you get the machine up to speed and then coast it does the vibration continue? I wonder if the front diff is doing something squirrely.

 

[quackattak]

Lee, what do you think of the auto lube, good points and bad?

 

[Lee-online]

Has this problem been there since new? If you get the machine up to speed and then coast it does the vibration continue? I wonder if the front diff is doing something squirrely.

Machine is new, less than 200 hours and has been doing it since it was purchased. The vibe "feels" like it is coming from the rear. We took some more video of it and sent it to the engineer. They are now calling the shots of what we need to do.

 

[Lee-online]

Lee, what do you think of the auto lube, good points and bad?

Since we rent the hammers, now they should get greases. I know for a fact the hammers were not grease every hour of opperation because they would come back dry and the bushing would be worn. It was hard to prove it was not greased and so we took the hit on repairing them.

When we rent them we sent a few tubes of hammer paste along so hopefully they get changed out when they are empty.

 

[RonG]

What powers the autolube system?All you have is hydraulics on the hammer it appears.Does it have a timer or how do you regulate the frequency of the lube dispenser?Thanks,Ron G

 

[alan627b]

Lee, thanks for posting the very interesting pics of your work. Some may come in handy if/when I ever get around to building my minature Cat shop diorama. Any pics of fixtures, tools etc that would be easy to model cheerfully accepted!
I have a question about the military 621B's...the outfit I work for buys these when they can find them, and I was wondering....do you know why the military spec'd these things without a cushion hitch?
My employer buys these (typically low hour) and retro fits them with the cushion hitches. Just wondered why no cushion hitches if you knew. Maybe they didn't want to deal with the pressurized nitrogen system?
Thanks,
Alan627b

 

[JimBruce42]

What powers the autolube system?All you have is hydraulics on the hammer it appears.Does it have a timer or how do you regulate the frequency of the lube dispenser?Thanks,Ron G

not sure if it's the same on the cat hammers, but the hammers we use that have auto lube systems on them I think have hydraulic line running to it, so every time the hammer fires and metered amount is released. I'm just an operator though, Lee probably knows better.

 

[cps]

not sure if it's the same on the cat hammers, but the hammers we use that have auto lube systems on them I think have hydraulic line running to it, so every time the hammer fires and metered amount is released. I'm just an operator though, Lee probably knows better.

Thats how the Rammer hammers work as far as i know! Also cat hammers used to be made by rammer as far as i know! not sure about now though!

My the way great photos Lee, keep up the good work

Aiden

 

[Lee-online]

yeah, thats how the hammers lube themselves.

As for the 621 not having cushion hitches, who knows, they were made in the early to mid 80's. It was probably a bean counter saving money.

 

[Lee-online]

963D, 6.6 common rail engine. The Fuel pump started to fail and shows signs of metal contamination so it needs the pump, rail, injectors and lines replaced.


It is a tight fit working through the access door. Removed the filters to see the pump I need to remove.


High pressure rail with the high pressure lines. These lines can only be used once.


Some of the stuff is off, in the process of removing the front cover to remove the pump. Still need to remove the injectors. If all the parts show up, should get it done tomorrow, depending on how late i stay.

 

[Richardjw~]

Out of interest what procedure do you use to determine/confirm the common rail pump & injectors need replacing?
Can you do it with a lap-top or do you need to put gauges in there and measure to see if you have excessive returns

 

[cb75]

Did that 963 come from a landfill?

 

[Per Eriksson]

Ever swapped pump on a C6.4 engine, like in a 320/323D? That made me wanna go on a engine designer killing spree.......

You can test the system with the computer and/or do a leakoff test from the injectors

 

[collins_br]

Per, I've done my 323D with lots of helpfull info from Lee, but i agree, not a nice job!!!

 

[rhudson1]

yep, deserve every penny of the hourly rate...

 

[Lee-online]

Out of interest what procedure do you use to determine/confirm the common rail pump & injectors need replacing?
Can you do it with a lap-top or do you need to put gauges in there and measure to see if you have excessive returns

With this one, it was running rough, ET showed low fuel pressure, the relief was ok. The two check valves on the side of the pump were pulled and there was metal pieces in there. cleaned them and it ran better but through experience, when you find metal its just amatter of time before it fails. Any debris will erode the injectors due to the high pressure.

Checked the leak off and it was 60ml where spec is 30ml.

On the bottom of the pump you can see the return line where I checked the leak off.( black nipple) Remove the regular banjo bolt and add one from the leak off kit. Now all the leak off fuel comes out and can be measured.

 

[Lee-online]

Did that 963 come from a landfill?

Yes, it does have the waste handle package and fire suppression. Oh it really stinks even though it was washed.

 

[Lee-online]

Ever swapped pump on a C6.4 engine, like in a 320/323D? That made me wanna go on a engine designer killing spree.......

You can test the system with the computer and/or do a leakoff test from the injectors

Yeah, did a 320 with a 6.4. not fun.

4.4 and 6.4 have the pump on the right side and the 4.6 and 6.6 on the left. there is all kind of room next to the counterweight, but no, put the pump between the engine and the main valve.

 

[Lee-online]

couple more pics
New injectors, lines and rail all installed and snugged up before torquing.


Rocker shaft reinstalled and lash adjusted.


The smelly pig


Standing on the wood box working through the access door is doing my back in.

 

[Lee-online]

Two more pics. I was the first one at work this morning so not much going on.

773D just converted to a water tanker.


Brand new D6T just assembled. Has sweeps and a winch.