Description
Product Details
| Seal Kit | 3701940 |
| Brand | CAT |
| Cylinder Type / Application | Hydraulic Cylinder Seal Kit. CAT does not identify a unique cylinder position on the public kit page; exact cylinder-group application must be confirmed. |
| Rod Diameter | 140 mm (existing listing; CAT's listed 140 mm-ID backup ring is a component dimension, not independent confirmation of nominal rod diameter) |
| Bore Diameter | 200 mm (existing listing; CAT lists a 200 mm-bore two-piece seal, but confirm nominal bore by cylinder group) |
| Product Type | Hydraulic Cylinder Seal Kit |
| CAT-Compatible Models | Excavators: 390D, 390D L, 365C L, 390F, 390F L, 374F, 365B L, 385C L, 365B II, 365C, 385B, 374F L, 385C, 345B, 374D L, 365B; Shovel Logger: 345C; Hex-Based Special Solution: 374F OEM, 6020B; Mobile Hydraulic Power Unit: 390D L, 365C L |
| Kit Components Listed by CAT | 6I-6790 seal ring (116.08 mm ID); 8C-9179 two-piece seal for 200 mm bore; 147-5771 hydraulic cylinder backup ring (140 mm ID) |
| CAT Part Availability | CAT currently marks kit 370-1940 as discontinued and advises contacting a dealer for replacement options. |
| Fitment Verification | Use the serial-specific cylinder group to confirm position, nominal rod/bore and replacement kit. |
Source: CAT Parts Store — 370-1940.