Case 310, 350, 350B Dozer Final Drive Parts

Final drive bearing and seal kits, pinions, shafts, sprocket shafts, seal carriers, spacers, and related components for Case 310, 350, and 350B crawler dozers.

Fits Models At A Glance

• 310 Series: 310, 310D, 310E, 310F, 310G
• 350 / 350B Series: 350, 350B

Key Notes

• Application: Final drive components for Case 310, 350, and 350B crawler dozer final drive systems
• Coverage: Includes final drive bearing and seal kits, pinions in 6-spline and 10-spline configurations, final drive to transmission shafts, sprocket shafts, sprocket nuts, final drive axle washers, seal carriers, spacers, final drive pinion couplers, and output shaft seals
• Function: Maintains final drive pinion, sprocket shaft, and seal integrity on Case 310, 350, and 350B crawler dozer platforms
• Fitment Note: Early and late serial number configurations apply on 310G final drive kits — verify serial number when ordering; 6-spline and 10-spline pinion configurations available

Why Choose Broken Tractor

• ✅ Final drive bearing and seal kits available for 310 and 350 series
• ✅ 6-spline and 10-spline pinion configurations covered
• ✅ Sprocket shafts, seal carriers, and spacers all available

Frequently Asked Questions

Which final drive bearing and seal kit fits a Case 310G dozer?

It depends on your 310G serial number, because Case built early and late versions. The CS-310-FDK kit fits the 310G Early along with the 310, 310C, 310D, 310E and 310F, while the CS-350-FDK kit fits the 310G Late Serial plus the 350 and 350B. Check your serial number before ordering, or call (800) 909-7060 and the parts team can help confirm the right kit.

Does the Case 310 dozer use a 6-spline or 10-spline final drive pinion?

The Case 310 can use either a 6-spline or a 10-spline final drive pinion, so check the part you are replacing. We carry the 6-spline pinion shaft (SKU 11832) and 6-spline pinion coupler (SKU 11831) for the 310. We also carry the 10-spline pinion shaft (SKU D31514) and 10-spline pinion coupler (SKU D32730), which fit the 310, 350 and 350B. Counting the splines on your old shaft or coupler is the simplest way to match the right part.

Which final drive seal fits a Case 350 or 350B dozer?

The final drive seal for the Case 350 and 350B is SKU R39274. Broken Tractor also carries final drive seal carriers (SKU D43356 and D43359) for the 310G, 350 and 350B, plus a final drive seal spacer (SKU D43360) that fits the 310, 350 and 350B. For the Case 310 crawler, we offer a final drive axle shaft oil seal that replaces D29517.

What sprocket shaft parts are available for the Case 310, 350 and 350B dozer final drive?

We carry the final drive sprocket shaft (SKU 11853), sprocket nut (SKU D29126) and final drive axle washer (SKU D29125), all fitting the Case 310, 350 and 350B. For machines with the new style sprocket, we also offer a sprocket spacer (SKU PV410) that fits the same models.

What final drive parts does Broken Tractor carry for the Case 310, 350 and 350B dozers?

We carry final drive bearing and seal kits, 6-spline and 10-spline pinion shafts and couplers, final drive to transmission shafts, sprocket shafts, sprocket nuts, axle washers, seal carriers, spacers and final drive seals. Some parts fit all three models while others are specific to the 310, the 310G or the 350 and 350B. Match the part number or model listed on each part to your machine before ordering.