PIN AS 1080980 - Caterpillar

Agricultural Tractor:
All Articulated Truck:
All Asphalt Paver:
All Backhoe Loader:
All Cold Planer:
All Compact Wheel Loader:
ALL Excavator:
All Forest Products:
All Integrated Toolcarrier:
All Landfill Compactor:
All Load Haul Dump:
All Mini Hydraulic Excavator:
All Motor Grader:
All Off-Highway Truck/Tractor:
All Paving Compactor:
All Pipelayer:
All Road Reclaimer/Soil Stabilizer:
All Skid Steer Loader:
All Soil Compactor:
All Telehandler:
All Track-Type Loader:
All Track-Type Skidder:
All Track-Type Tractor:
All Underground Articulated Truck:
All Wheel Loader:
All Wheel Skidder:
All Wheel Tractor:
All Wheel Tractor-Scraper:
AllService Magazine SEPD0594, 4 September 2001, "New Assembly Instructions for Rod Seals on Hydraulic Cylinders are Available". Disregard this article. See the replacement article that follows.During the period between April 2000 and October 2000, some seal kits for hydraulic cylinders were packaged with incorrect assembly instructions.The seal kits contained the new yellow colored Caterpillar rod seals. The instructions that were included with the kit contained information for the old seals. The older instructions will lead to incorrect installation of the new seals. The new seals can be recognized by the yellow color. The new seals also have a wiper seal with a flat face.Pay close attention to the correct position of the backup ring for the buffer seal. This backup ring should face toward the rod end of the cylinder. The following instructions are the correct instructions.
Illustration 1 g00881399
(1) Buffer seal (2) Backup ring (3) U-cup seal (4) Wiper seal (5) Cylinder Head (B) Surface with "THIS SIDE OUT" mark
Refer to Illustration 1 in order to install the polyurethane buffer seal (1) in the inner groove of the cylinder head (5) .
Refer to Illustration 1 in order to install the backup ring (2) for the buffer seal in the inner groove on top of polyurethane buffer seal (1). The backup ring for the buffer seal should face toward the rod end of the cylinder.
Install the U-Cup seal (3) in the head. Refer to Illustration 1 in order to install the seal with the open end of the "U" facing toward the piston end of the cylinder.Note: In some cases, the axial width of the Caterpillar U-cup seal may be different from the U-cup seal that is being replaced. The Caterpillar U-cup seal is correctly sized, based on the rod diameter and the seal groove diameter. The difference in size of the Caterpillar U-cup seal will not cause a sealing problem, even though there may be unused space in the seal groove. The U-cup seal will not move from the downstream groove wall when the rod is retracting. Pressure will hold the U-cup seal against the back of the seal groove. Also, the friction on the outside diameter of the seal is much greater than the friction on the inside diameter, which will also keep the seal firmly seated in the back of the seal groove. Because of these factors, the U-cup seal will not touch the upstream side of the seal groove. Therefore, the difference in the axial width between the U-cup seal and the seal groove is not a factor in providing good sealing.
Use sandpaper or emery cloth to scuff the surfaces of the counterbore in the cylinder head