Case IH 9380 Axle Seal Replacement | 90-5988T1 | Greater Ag Parts
Case IH 9380 Axle Seal Replacement

Replacing an axle seal on a Case IH 9100 Series 4WD tractor is a relatively straightforward repair, but proper safety precautions and the right tools are essential.
In this repair, Melchert Equipment is performing the work on a Case IH 9380 4WD tractor. Greater Ag Parts is supplying the replacement parts and specialty tool needed for the repair.
This article highlights the major components involved in the repair, including the axle seal and inner bearing hub, as well as the special spanner wrench required for the job.
Case IH 9380 Axle Seal Part Number
The Case IH 9380 featured in this repair uses the following components:
- Axle Seal: 90-5988T1
- Inner Bearing Hub: 90-8098T1
- Specialty Tool: Axle Spanner Wrench
Part numbers can vary depending on the tractor’s serial number and axle configuration. Always verify the application before ordering.
Removing the Dual Wheel and Main Tire
Accessing the axle seal requires removal of the dual wheel and main tire.
These wheel and tire assemblies are extremely heavy, so proper shop equipment and safe handling procedures are critical. Once the tire is removed, the tractor must be securely supported using appropriate equipment before work continues.
Never rely solely on a hydraulic jack to support the tractor while working on the axle or planetary assembly.
This is one of the most important safety considerations when servicing a large Case IH 4WD tractor.
Draining the Planetary
After the wheel and tire have been removed and the tractor is safely supported, the oil needs to be drained from the planetary.
With the planetary drained, the components can be accessed and inspected. This is also a good opportunity to check the oil and surrounding components for contamination, wear, or metal debris.
Case IH 9380 Axle Seal and Bearing Hub

The axle seal being replaced on this Case IH 9380 is 90-5988T1.
The inner bearing hub is 90-8098T1.
Once the planetary and axle components are accessible, the repair is relatively self-explanatory for an experienced agricultural equipment technician. Rather than attempting to cover every step of the mechanical procedure, the purpose of this article is to identify the key components and specialty tool involved.
Melchert Equipment is performing the mechanical work shown in this repair, while Greater Ag Parts is supplying the parts and tool.
The Special Tool – Axle Spanner Wrench
One of the most important tools for this repair is the axle spanner wrench.
The spanner wrench is used to remove and reinstall the retaining components of the axle assembly. Having the correct tool can make the repair considerably easier and helps avoid damaging components during disassembly and reassembly.
Greater Ag Parts offers the spanner wrench for purchase, along with the replacement parts needed for this Case IH axle repair.
Having the proper tool on hand before starting the repair can save valuable shop time.
Case IH 9100 Series 4WD Tractor Parts
The Case IH 9100 Series tractors are large, heavy-duty 4WD machines that continue to see plenty of field use. As these tractors age, components such as axle seals, bearing hubs, planetary components, and other drivetrain parts may eventually require service.
When you need replacement parts for your Case IH 9100 Series tractor, Greater Ag Parts can help you locate the components and specialty tools needed to keep your equipment working.
For the Case IH 9380 featured in this repair, the primary components are:
- 90-5988T1 Case IH axle seal
- 90-8098T1 inner bearing hub
- Case IH 9100 Series axle spanner wrench
Parts Supplied by Greater Ag Parts
Greater Ag Parts supplies agricultural equipment replacement parts and specialty tools for repairs like this one.
For this Case IH 9380 axle seal repair, Greater Ag Parts supplied the replacement components and spanner wrench used by Melchert Equipment.
If you’re working on a Case IH 9380 or another Case IH 9100 Series 4WD tractor, contact Greater Ag Parts to find the parts and tools you need.
Repair Performed by Melchert Equipment
The repair shown in this article was performed by Melchert Equipment.
Greater Ag Parts is not performing the mechanical installation. Our role is to provide the replacement parts and specialty tools needed by equipment owners, technicians, and repair shops.
We appreciate Melchert Equipment for allowing us to highlight this repair and show the parts and tools involved in servicing the Case IH 9380.
Need Case IH 9380 Axle Parts?
If your Case IH 9380 is showing signs of an axle seal leak, or you’re servicing the planetary and axle assembly while the components are accessible, having the correct replacement parts and specialty tools can make the repair much easier.
Greater Ag Parts supplies Case IH replacement parts and specialty tools to help agricultural equipment owners and repair professionals keep their machines in the field.
For the Case IH 9380 shown here, start by verifying the application for 90-5988T1 axle seal, 90-8098T1 inner bearing hub, and the appropriate axle spanner wrench before ordering.
Always verify part numbers and fitment for your specific tractor and serial number before purchasing.
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