D7 3T Sheave Block

Not sure exactly what you are looking for but I probably have what you need.

I'm after one of the pulleys that fit into the sheave block. The internal bearing surface measurement should be around 3.8750 inch in new condition. A bit of wear would be OK as this is not critical for the rope lifting the blade in its operation.

OK. Just so I know what to look for , what is the dia of the pulley . also the width.
I take it you are in WA some where..

These sheave blocks are on the front of the early dozers for raising and lowering the blade with a friction winch of the front of the crank. They are genuine Caterpillar parts. The pulley size is 9 5/8'' outside diameter, 1 1/4'' wide and a 3.870'' hole in the centre in which the bearing runs against which will be hardened. The original Cat part number is 1J1150. I am in Western Australia.

Ok. Sounds like you have a Steelweld front mounted power control unit.
I will try to have a look tomorrow.
A. K.

I think I might have two complete spares. I'm located in Texas.
Cell 713-806-8511

Plenty of those sheaves around, just maybe not in Aus.

Couple of options here!!
Haven't done any measuring yet. Probably best to give me a ring first to see if it is worth spending more time on.
0428717065
A. K.

I have a few options here.
I have checked out the link Old Magnet posted on the heavy equipment forum with Machinery trader who list several suppliers of pulleys (Cat 1J1150). I am awaiting a reply from them if I can get a new pulley.
The third photo you listed Andrew looks similar to the sheave block I have.
Wholland, I am having trouble sourcing a second inner cone (part No. 3F3874) for the bearing in the pulley. You have two pulleys complete, is this with the bearing? Are they new or used as I would not mind having a spare wheel on hand.