Help identifying 955L

[PhilDirt]

Here's the parts list from doing cylinders on my 955L 2 years ago. I had aftermarket seal kits on hand, the seals were too small to fit my cylinders so the mechanic matched them up at a local hydraulic shop. I hope these PNs can be crossed to something available to you. This was for 2 tilt cylinders and one lift cylinder. The machine is SN 85J4799, it was delivered in January 1972 so I assume it was built in 1971.
The cylinders have no numbers stamped on them. I looked hard, and the mechanic who is very Cat knowledgeable could not find any either.
Hope this helps.

 

[Nige]

For Tilt Cylinders the piston Part Number changed during the production run of the 7J-9637/7J-9638 cylinders.

Early (CHG00-CHG04) cylinders had two 5J5020 Seals (Ref #12) on the piston. Later (CHG05-Up) had only one. The fibre wear ring (Ref #14) on the piston became longer on the later piston with only one seal. The wear ring Part Number changed from 4J4630 (early) to 4J3420 (later)

Apart from that all the other Tilt Cylinder seals are the same.

The one thing I am unable to do is to accurately date the change from the Early to the Late piston design.

EARLY 7J-9638 TILT CYLINDER GROUP - CHANGE 4 - 5.00" BORE X 23.30" STROKE



LATE 7J-9638 TILT CYLINDER GROUP - CHANGE 5 - 5.00" BORE X 23.30" STROKE

 

[Nige]

Here is the list of seals for early/late Tilt Cylinders. I have updated Part Numbers to the latest P/Ns that are currently available.

Common
1 x 2K4096 Ring, Backup
1 x 5F3144 Seal, O-ring
1 x 1672312 Seal, U-Cup
1 x 1672201 Seal, Buffer
1 x 1672463 Seal, Wiper

Early piston
2 x 5J5020 Seal As
1 x 4J4630 Ring, Wear

Later Piston
1 x 5J5020 Seal As
1 x 4J3420 Ring, Wear

 

[Delinquent26]

Thanks PhilDirt. That will probably come in handy.

Nige the number was 6J2635. When I looked it up, it came back as a cylinder Lug. I have that parts manual, but my maintenance manual is GEG0983-02

I Finally got out to look again. Here’s a look a what I found. Something stamped on bottom flanges

 

[Delinquent26]

Thanks PhilDirt. That will probably come in handy.

Nige I Finally got out to look again. Here’s a look a what I found. Something stamped on bottom flanges

 

[Delinquent26]

Are these bands what you refer to as a tag? Not legible

 

[OzDozer]

The bottom flange numbers are casting numbers, not stamped letter markings. You need to look for indented letter stamp, numbers/letters.

The bands in photo 2 and photo 3 above are the bands Nige was referring to, showing the part number of the hose and the pipe respectively.
If the pipe is welded to the cylinder, it may be the cylinder part number band.

 

[Nige]

Nige the number was 6J2635.

That confirms your Tilt Cylinder Part Numbers as 7J-9637 & 7J-9638.

 

[Nige]

Are these bands what you refer to as a tag

Because that tube bolts on to the cylinder the tag will have the P/N of the Tube on it, not the cylinder.

 

[Nige]

OK, so as far as I can determine your Lift Cylinders are 7K-9380. The seals are: -

Head
1 x 1757905 Seal, O-Ring
1 x 2K2961 Ring, Backup
1 x 1672201 Seal, Buffer
1 x 7J4824 Seal, U-Cup
1 x 1672463 Seal, Wiper

Piston
1 x 5J4988 Seal As
1 x 7J1731 Ring, Wear