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Cat 963 repairs

Spyros33

Spyros33

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My friend at the shop had a 963 brought that needs some serious work done. He asked if i can give him a hand whenever have some time and of course i wouldnt miss that opportunity.

Figured i can post some pictures of the proccess.

Enjoy!
 
Spyros33

Spyros33

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We started yesterday by taking the bucket off. Lower pin assembly was really Hard to remove. Used hydraulic press, hammering and heat.
We ended up torching the tapered cups and the screws on the lift arms. After some serious hydraulic pressure and a lot of heat, they came out with a big bang!
IMG_20210410_153034.jpg IMG_20210410_153101.jpg
 
Spyros33

Spyros33

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Today we had the machine sit on blocks and Took out the tracks. Some rollers have to be replaced and we noticed some play on the track frame pivot so we Took the track frame out as well.
IMG_20210410_163800.jpg IMG_20210410_165211.jpg IMG_20210410_174137.jpg
 
CM1995

CM1995

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Is that a 977 or 988 with ripper in the background behind the orange forklift?
 
Spyros33

Spyros33

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Cat977 said:
Man Spyros you aren't shy when it's time to Tear her Down! Love the pictures.
Click to expand...

My friend said the same thing:)
In the construction comoany i used to work, we used to rebuild all kinds of machinery, 5-6 of them every year. It was a great experience

You can have a look in one of our projects here
 
Nige

Nige

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G..G..G..Granville.........!! Fetch your cloth.
Spyros33 said:
The nuts on the bolts were so worn we couldnt get the socket wrench to fit so it was a one way street
Click to expand...
Suggestion for when you install the new pins. You can fabricate some wedges then drive them into the "split" in the end of the lift arm (see arrow). The wedge needs to be pretty wide, as wide as you can make it. This will open the bore just a hair and help installation of the pins. The wedge should also be quite short because otherwise the bucket will hit the wedge before you can get the pin bores in the lift arm and the bucket lined up.

upload_2021-4-13_19-57-27.png

DON'T under any circumstances put anti-seize anywhere on the outside diameter of the lower bucket pins. Put anti-seize ONLY on the inside diameter of the tapered collets (arrowed) that are installed on each end of the pin.

upload_2021-4-13_20-0-1.png
 
B

Bluox

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WA state
People who have actually done this before just loosen the 2 outside bolts and tighten the middle bolt to open the eye and drive the pins out.
Bob
 
Nige

Nige

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Bluox said:
People who have actually done this before just loosen the 2 outside bolts and tighten the middle bolt to open the eye and drive the pins out.
Bob
Click to expand...
There are no jacking bolts on the end of that lift arm, unlike some of the larger models. The three bolts in the photos above all screw into a threaded plate underneath.
upload_2021-4-13_23-56-13.png
Loosen three bolts (5) at the end of both lift arms.
upload_2021-4-13_23-58-1.png
Use tooling (C) to remove the lower bucket pins if they are tight in their bores.
 
Spyros33

Spyros33

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Mechanical engineer, machine operator
Nige said:
There are no jacking bolts on the end of that lift arm, unlike some of the larger models. The three bolts in the photos above all screw into a threaded plate underneath.
View attachment 237379
Loosen three bolts (5) at the end of both lift arms.
View attachment 237380
Use tooling (C) to remove the lower bucket pins if they are tight in their bores.
Click to expand...

Now i understand why you asked about the gas cutting of the bolts on the split arm.

There was no threaded plate, Just bolts with nuts.
 
Nige

Nige

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Here's the complete pn & seal group for the bucxket linkage. I picked a S/N prefix at random but all the 963 models, from the earliest one right up the C, are the same in this area.
The "bar" as it is called on the Parts List, is Ref #20. I assume that the idea of the bar is to get more clamping force on the split joint and also to minimize the potential of damage underneath the lift arm if nuts were used.
 

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