XTR-8058 Hub Cap (Replaces 4195)
THE XTRACTOR - OIL BATH HUB CAPS
Designed for TP trailer axle applications, The Xtractor features an integrated multistage filter that continuously captures metallic and particulate debris inside hub oil to reduce friction and better protect bearings. The result is better fuel efficiency and longer-lasting parts.
Tech Specs
- Axle Position: Trailer - TP (Parallel Spindle)
- Number of Bolt Holes: 6
- Bolt Circle Diameter: 6.750 in
- Flange Outer Diameter: 7.500 in
- Cross Reference: Stemco 4195, SKF 1696, 1796, 1799, 1869, National 340-195
In The Box
- One (1) XTR-8058 Hub Cap Assembly
- One (1) Premium Flange Gasket
- Six (6) 5/16" x ¾" Flange Bolts
Multistage Oil Filtration
The Xtractor is the only heavy-duty hub cap that actively filters hub oil to remove wear-inducing hard particulates. Cleaner oil = less friction, less heat, and better fuel economy.
HexThread Cartridge
The HexThread® Cartridge provides easy
front access so you can perform better inspections, drain and refill oil, or replace damaged components without having to
remove or replace the entire hub cap.
A BETTER BUILT HUB CAP
Military Grade Materials
The only hub cap tested to MIL-STD-810F, delivering unmatched strength, heat resistance, durability, and sealing performance.
NO BREAK Sight Glass
The UV-stabilized sight glass has a "No Break" CHARPY impact rating, as well as exceptionally clear color and high-temperature tolerance.
Pressure Venting Plug
The rubber plug vents internal pressure and is rated to withstand the rigors of heavy-duty operation without cracking or leaking.
INSTAllATION GUIDE
Bolt Body to Hub Flange
Lube Cartridge Threads
Hand-Tighten Cartridge
Torque to 90 Ft-LBS
Add lubricant to full line
Install rubber plug
WHAT USERS ARE SAYING
I saw that my oil was really black so I drained and refilled it with new oil before I even finished filling my tank. You can't do that with any other cap.
Anthony P.
Owner Operator based in Michigan
I've never seen another hub cap built this well. It is easy to install and the filter is a really smart way to remove contamination.
Vlad K.
Mobile Diesel Mechanic based in North Carolina
I was skeptical at first, but once I opened the cartridge and saw how full of gunk the filter was, I was sold.
Mark H.
Owner Operator based in South Carolina
Faqs
Why does hub oil need to be filtered?
Over time bearings and seals wear, which increases friction and elevates operating temperature inside the wheel-end system. These conditions accelerate parts wear and decrease fuel efficiency. Filtering hub oil breaks this deterioration cycle and improves system performance.
Isn't a magnetic plug enough?
Magnets capture ferrous particles, but much of the contaminant load in a hub is not magnetic. The multistage filter in The Xtractor captures both magnetic and non-magnetic particles.
How often should I check my oil?
Installed on an existing hub, you should perform your first visual check of your hub oil and filter after 25K miles. Thereafter every 75K-100K miles is sufficient. Your own operating conditions will ultimately dictate inspection frequency.
How do I know if the filter needs changing?
When a visual inspection of the filter reveals wear metals stuck to the magnets and/or a sludgy slurry accumulating inside the mesh, oil should be drained and the filter should be cleaned or replaced.
How do I change the filter?
If the filter is clogged simply replace the entire HexThread Cartridge. It comes fully assembled with a brand new sight glass, plug, and filter.
