D8Dude wrote:

Hi Bulletpruf,
I love seeing projects like this reviving something that some might give up for scrap.

I may be on the wrong track here, but I would use caution in trying to force the fuel rack. The cause of the rack to not be moving if it's been sitting for some time is more likely a stuck fuel pump plunger than the rack itself being stuck. Forcing the rack can rotate the gear section on the pump plunger as it's only a press fit on the shaft, and alter the fuel pump setting. The pump plungers need to be checked to see that they will rise and fall freely and turn freely, one or more is likely stuck in the raised position after being pushed upwards by the fuel pump cam. They can prevent the rack from moving as it should.
To repeat myself, excess force must not be applied to the fuel rack in order to free up fuel pump plungers.

Hopefully someone will correct me if I am wrong.

Thanks for the info on the rack.  I appreciate it.

Scott

PhilC wrote:

D8Dude is correct about the rack. Forcing it will only end is more issues. Having said that though I have freed racks up by gently levering them back and forth with a screwdriver but you must be careful not to force it too much.
In regards to the serial number location on the engine it should be higher up than where you pointed to in the video and it may or may not be stamped where the tag was. There should be four small holes where the tag was. Serial number on the rear of the machine would most likely be covered by the winch. If the engine block was replaced at some time then it may not have a serial number. I have a D8 15A with no serial number on the engine block.
In regards to the winch controls, the two levers that you were looking at are the brake and clutch with the outer one the brake and the inner one with the broken cable the clutch. If you follow the cable to the winch you may be able to move the other end of the cable to disengage the clutch
The way the throttle works is it increases or decreases tension on a spring in the governor that in turn moves the rack. The only exception to this is when you shut down the machine, then the throttle lever forces the rack to the shut down position overriding the governor as the governor would be doing its best to keep the engine going. The link between the throttle lever and the rack has to be flexible so that the governor can control revs. I had a D6 with a seized counterweight system on the governor and it was surprising how much the revs fluctuated with a non functioning governor.
You could probably get away with the broken track tension spring as it is near the end. if it was in the middle then it would be a bigger issue.
Re chroming the rods in the rams is more expensive and less effective than replacing the chrome shafts. The nose of that machine seems to be way lower than it should be even with the blade raised.
That hole in from of the gear stick should definitely not be open. There should be a plug with a recessed tapered square drive in it.

Thanks for the information on the serial numbers.  I'll look at the engine tag location next time I'm out there.

Appreciate the explanation on the winch, filler hole, rods, track tension spring, throttle, and governor as well; that's all very helpful. 

Scott

trainzkid88 wrote:

thats why i said lots of penertrant time and gentle taps.
by notch i meant you feel a detent you feel it "click" its on the governor ratchet pall mechanism itself there is notching to see its all internal to the governor.

Ok, thanks.

Scott

trainzkid88 wrote:

as phil mentioned rechoming rams is cost prohibitive and can ruin the shaft anyway then you have the expense of a get shafts re-manufactured we had new shafts welded to the original rod ends done for around 900 bucks.
it was quoted at 700 bucks each for the rechroming job plus parts and labour. if your interested in how its done have a look at cutting edge engineering on youtube. it his bread and butter he does rams for 300 tonne capacity mining shovels.
its a good idea to park the blade on a block of timber etc if the machine will sit for a while in the weather so the rams arent exposed.

the cousin worked in the mines doing maintenance and he said he saw some companies had made covers out of canvas to help keep the ram shafts clean and protect from weather somewhat.
 

Sounds good.  Thanks for the info.

Scott

seiscat wrote:

Wait!!! The D7D Used the same basic engine as the D7E. The fuel rack doesn't move despite movement of the throttle control lever until oil pressure is high enough to allow it to move!!
Be Careful,
Craig

Hey Craig - This is what I was hoping to hear.  Someone posted a similar comment on the YouTube video.  FYI - the engine just might be from a D7E based on the block casting.  Either that, or it's a D7D.

Thanks!

Scott

 

seiscat wrote:

Here's the transmission fill plug below. The broken recoil spring is not as serious as you think. I ran a D6D with a similar break for 15 years. The hydraulic ram chrome missing that far down isn't that important.
Craig

 

Hi Craig - 

Thanks for the details.  We'll get it plugged up the next time we're there.

Understood on the recoil spring.

Scott

seiscat wrote:

That D7D is factory equipped with a D339 engine (same basic engine as D7E) rated at 140 HP(if I remember correctly.) All D339 engines had the safety feature of the fuel rack that only advanced when sufficient oil pressure was achieved. The early D7E was 160 HP and later models 180HP. The D7D was originally equipped with a 2 cyl. starting engine.
I'm pressed for time this morning, I will be available for more later.
Craig

Excellent.  I'm glad I didn't really bear down on it.

Next time we're out there, I hope to get the winch disengaged so I'm not turning that with the starter.  I'll also work on the fuel system - cut the fuel at the tank and drain the nasty stuff out of the filter housings.  From there, with fresh batteries, I should be able to build up some oil pressure.

What about the clutch?  Isn't there a chance that the clutch is stuck and I'm turning extra weight as I'm trying to start it?  There's a plate on the top of the clutch area that looks like an inspection cover.

Thanks again,

Scott

I looked at the pic under magnification and thought I could see a rivet hole were the S/N tag should be. The S/N should be stamped into the block under were the tag was in the area that I've outlined in red. Scrape off the paint and look.
Craig

 

 

seiscat wrote:

I looked at the pic under magnification and thought I could see a rivet hole were the S/N tag should be. The S/N should be stamped into the block under were the tag was in the area that I've outlined in red. Scrape off the paint and look.
Craig



 

Thanks, Craig.  I'll check it out next time I'm there.

It looks like a D7E block with D7 17AD manifolds, turbo etc as that is a different configuration to a D7E.

Wombat