Description
Product Details
| Seal Kit | 3500973 |
| Cylinder Part Number | 4185481, 4188812 |
| Brand | CAT |
| Cylinder Type | Boom Cylinder |
| Rod Diameter | 100 mm |
| Bore Diameter | 140 mm |
| Product Type | Hydraulic Cylinder Seal Kit |
| Application / Fitment Status | CAT confirms 350-0973 is a hydraulic cylinder seal kit and lists the equipment and components below. The current Boom Cylinder label and cylinder references 4185481/4188812 are not confirmed by the public kit page; the existing 100/140 mm values are retained as listing values pending exact cylinder-group verification. |
| CAT-Compatible Models | Excavators: 328D LCR, 329D, 329D L, 329D2 L, 325D L, 329D2, 325D. Mobile hydraulic power units: 329D L, 325D L. |
| Kit Components / CAT Specifications | 4I-3631 backup ring (130 mm OD, qty 2); 096-1571 plastic ring (132 mm ID, qty 2); 096-1570 seal (140 mm OD, qty 1); 350-0955 buffer seal (99 mm ID, qty 1); 121-1372 backup ring (100 mm ID, qty 1); 095-1721 O-ring (3.1 × 134.4 mm, qty 1); 4I-3627 backup ring (135 mm ID, qty 1); 133-6904 seal (qty 1); 126-1876 seal ring (qty 1); 247-8874 ring (135.04 mm ID, qty 2); 350-0960 U-cup seal (100 mm ID, qty 1). |
Source: CAT Parts Store — 3500973. CAT notes seal kit fitment is specific to the cylinder-group part number.