Cat 777D Mining Truck

[Papy]

Anyone can spot the difference ?



Great work, Joe !!!!

Ho ! and....about the front grill......it will look more dusty than dirty, so the color lying under makes no difference

[doodlebug]

Valid point papy! I've heard that Union Pacific railroad, are really big sob's when it come to modeling-no permission, and get caught, expect a lawsuit. That's really a dirty rotten low down shame on big business's part!
The truck look's super with the new paint!
Later, Neil#2 aka doodlebug.

[dirtpusher9]

Tom, the truck turned out great.

When I contacted Cat about building more dozers I talked with one of the wheels in Peoria, they said nothing about my decals and they were watching the videos so they seen the decals.

[JensR]

Those rules are just pathetic

I googled and I'm pretty sure the grille is black.
The photo on page 7 is dusty and hence might look like raw stainless steel.
But the black&yellow paint scheme is CAT's trademark, I guess they wouldn't put a silver grille on their machinery.

[modelman]

JensR-I may be" old as dirt" but I think my eyes are better than yours.I don't see what you are seeing.

[Papy]

Originally Posted by JensR

...
I googled and I'm pretty sure the grille is black...

I see (and sometimes even operate) a triple 7 everyday, and I can confirm it is originaly black on the real truck.

It's just that you only see the real color every 250h, when you wash it for a service

[modelman]

I see (and sometimes even operate) a triple 7 everyday, and I can confirm it is originaly black on the real truck.

That's good enough for me papy!

[JensR]

?
Google image source:
http://www.google.co.uk/search?q=cat+777d&tbm=isch

Or did I miss the joke about them being dusty?
Yes, they get dusty and then may look grey, but not like raw metal:
http://www.scpm-international-concas...-occasion.html
(I chose this one, because it shows part of the grille rather black and the other rather grey.)

[modelman]

I made a couple of changes. The original muffler was scaled off the 150th norscot model and I felt it was too short so I made the outlet pipe longer-

I painted the grille black following "papys" comments-

Just a few details while I am waiting on a radio.

[9W Monighan]

Now it looks better with proper identification. What radio are you going to use?

[Lil Giants]

Lookin quite spiffy Tom, well done on your quest to build your dump trk.

Now for the video of your shovel loading the 777 & then the 777 hauling off a full load to the pile.

[modelman]

I agree steve-the decals add to the look of the truck. I am gonna use the Traxxas radio that "tc1cat" suggested. It has the correct switches I need and is affordably priced. Lil Giants joe-I am excited about loading the truck with my shovel and when I get the radio in I will try to do a video. Sandcraft Transport-thanks for your comments-I have worked on this a long time and have enjoyed it but I am glad it is almost finished.

[modelman]

I got my radio today and I must say I am really disappointed. The-2-pos. switch is only an always on rocker switch and the-3-pos. switch is an always on-2-pos. switch. The third pos. does nothing. These are just used to move servos to different positions on the Traxxas cars. This is not going to work on this truck unless someone can tell me how to convert the-3-pos. switch to a real-3-pos. switch with an off position. Anyone know anything about this?

[JensR]

Hi!

First: Traxxas info:
http://traxxas.com/products/parts/tr...k2ch-downloads

Edit:
There are different types of the TQ4 with different behaviours.

It seems the behaviour of the TQ4 HO is known to be rather weird:
"The 3-position switch on the TQ4 is super weird. The switch actually controls two servos. Move the switch down, ch3 moves. Move the switch up, ch3 moves back and ch4 moves."
from
http://www.scale4x4rc.org/forums/showthread.php?t=51718

Also from there:
"However, if you open up your radio and switch the wires that go from the 3 position toggle switch to the 2 position switch, you will have a "TRUE" 3 position and a 2 position."

I suggest you head over and read what our Scale 4x4 friends are up to

Best of luck, the programming tree of that radio drives me nuts just by reading it.
Jens

[modelman]

I may have not been clear on my explanation. With-1- servo hooked to the-2- pos. switch it just moves from one pos. to another. The-3-pos. switch does the same thing. The bottom pos. does nothing. I did not try-2-servos but that will not work for me anyway. I wanted the-2-pos. switch to control lights (on-off) and the-3-pos. switch to raise and lower the dump box(off center pos.). I called the traxxas folks and they said the-3-pos. switch is actually not a-3-pos. switch.

[JensR]

As I quoted above from Scale 4x4:

"However, if you open up your radio and switch the wires that go from the 3 position toggle switch to the 2 position switch, you will have a "TRUE" 3 position and a 2 position."

Worth a try?

Also, if all else fails, you can install end-position switches to the bed. Then you only need two positions, as the dump bed will stop when the end points are reached. You cannot stop the dump bed in between, though, which is a bit of a downer admittedly.

So, you have several options.

One of them is to sell the radio and get a Turnigy 9x, which is a 7-and-a-half channel radio (7 proportional and one on-off) plus it has a large LCD screen for setting it up.

[modelman]

JensR-thanks for the link-I read that and may give it a try. However,that doesn't make sense to me strictly from and electrical point of view and seems like a good way to ruin a radio but it is no good to me as it is. I already have the limit switches installed and the rocker switch will work the dump box but I still have to have an on-off switch for the lights. Live & learn I guess. I was trying to get by with a cheap radio and I suspect it is not going to work.

[JensR]

I cannot really comment on the wiring issue, as I don't know how it looks inside.

However, I do believe that two "half channels" with two servo positions each is all you need:
Channel 3: light on / off
Channel 4: dump bed up / down until limit switch reached.

Anyway, here is someone selling an adapter to get proper three-position control:
http://wantasummit.com/default.aspx
http://www.rccrawler.com/forum/showthread.php?t=307196

[modelman]

JensR-I hooked up-2- servos to channel-3&4. The rocker switch moves the chnl-3-servo full lock one direction. Move the-3-pos. switch up and the-4-chnl-servo moves full lock in one direction. Move the rocker switch down and the servo returns to normal pos... Move the-3- pos. switch back to center and the servo goes back to normal pos.. Move-3-pos. switch down and nothing moves. Tried various combinations and nothing worked differently. I can make the dump box work but for lights I need-1-switch with off-(no power)-on(power). These switches are always on. They just move servos to different pos. and I guess the pots turn the servos off. However, I have never used a radio with switches. Maybe they are all like this. I don't know. I may try the mods to the radio but it involves splicing wires together inside this tiny space and I doubt if I can do that. Oh Well!!!

[Espeefan]

The 777D is looking a world's difference better with the black grille and the decals. It never ceases to amaze me how talented some of you guys are. You take nothing but raw materials and create something that is a true scale work of art. And it's functional too!