New 1866319 Washer Replacement suitable for Caterpillar Equipment
- New Washer Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 1866319 Washer
â–¶Specification for 1866319 Washer
â–¶Exact Fit Guarantee for 1866319 Washer
â–¶| Dimensions | 7.48x7.48x0.39 |
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Above and Beyond
Staff took care of issue that was nit created by them. Package was lost by UPS. Propel sent me another part Next Day Air to correct it. -
When I had questions, they were answered quickly and kindly.
Thank you!! -
Good service, quick response.
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Rapid response! Excellent service!
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Online order.
I had a good experience this morning I placed an online order and everything went smoothly. The staff at propel parts has always been helpful in the past when I have been looking for harder to find parts or something that wasn’t listed online.
Frequently Asked Questions
What is the 1866319 washer used for?
The 1866319 is a washer that distributes load under a bolt or nut, guarding the mating surface and supporting consistent clamp force.
How do I install the 1866319 washer?
Fitting the 1866319 correctly comes down to clean surfaces and following the manual sequence. Work through these steps:
- Power down the machine and isolate the assembly before service
- Clean the seating surface and check it for damage or burrs
- Place the 1866319 in the correct orientation under the fastener
- Torque the fastener to specification so the washer seats evenly
Which Caterpillar machines is the 1866319 compatible with?
Fitment for the 1866319 depends on your specific Caterpillar model and the assembly it serves, so confirm the application before you order. Check your manual or reach out to Propel Parts for help verifying fitment.
Does the 1866319 washer meet performance standards?
Yes. The 1866319 is manufactured to meet OEM specifications for tolerance and material quality. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications for dependable, long-term performance.
How often should the 1866319 be replaced?
Plan to replace the 1866319 during a rebuild of the surrounding components, or sooner if inspection shows it is past its serviceable limit.
What are the signs of a worn or failing 1866319 washer?
When the 1866319 reaches the end of its service life, the symptoms tend to show up first as performance or wear issues. Look for:
- A joint that won't hold torque
- Cupping, cracking, or flattening of the washer
- Marking or embedding into the mating surface
- Corrosion that weakens the contact area
Why is the 1866319 important, and what related parts work with it?
Replacing the 1866319 when needed keeps the system within its designed clearances and loads, which extends the life of the surrounding parts and supports dependable performance. Related hardware on our site includes 1118606 Bolt Oil Jet and 1D4610 Cap Screw High He.

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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