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Home > Products > O Ring Seals > 419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3

419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3

Name: 419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3
Brand: Guangzhou Opal Machinery Parts Operation Department
SKU: WA320-6
Price: 0.10 USD
Availability: InStock

Product Details

Place of Origin: China

Brand Name: OUB

Certification: ISO9001

Model Number: WA320-6

Payment & Shipping Terms

Minimum Order Quantity: 10

Price: Negotiable

Packaging Details: PP Bag Inside.outer is carton with film wrapped.

Delivery Time: Within 5-15 days after getting your desposit

Payment Terms: L/C,D/A,D/P,T/T,Western Union

Supply Ability: 1000Pcs

Get Best Price

Product Details

Product Description

Product Details

Highlight: 
                                                                                                                                                                                                                                                O Ring seal for WA320-6, Machinery spare parts ring seal, WA320-3 replacement O Ring seal
                              

Part No.::	419-33-21420	Part Name::	D-RING
Model:	WA320-5	Machine:	Loaders
Material:	Rubber,VITON	Color:	BLACK

Part No.::	419-33-21420
Part Name::	D-RING
Model:	WA320-5
Machine:	Loaders
Material:	Rubber,VITON
Color:	BLACK

Product Description

1. Quick Details of seal 419-33-21420 :

Part NO.	419-33-21420
Machine	WA320-6
Size	OEM
Material	NBR,VITON
Oil seal type	D-RING

2. 419-33-21420 parts on group :

419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3 0

NO.	PART NO.	PART NAME	QTY
1	419-22-30010	AXLE ASSEMBLY,FRONT	1
2	419-22-30050	AXLE ASSEMBLY,FRONT (LIMITED SLIP DIFF.)	1
3	419-33-21761	PLATE	2
4	418-33-21340	DISC	4
5	419-33-21720	PISTON	2
6	419-33-21420	SEAL	2
7	419-33-31750	PLATE	4
8	419-33-21740	SPRING	8
9	01252-30816	BOLT	4
10	154-61-16570	WASHER	4

3. 419-33-21420 picture:

419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3 1
4. Service part number :

PART NO.	PART NO.	Part NO.
707-99-75600	707-35-52660	56B-50-34650
707-99-44340	707-99-59740	707-35-52690
707-99-44340	707-99-59680	707-99-75600
707-99-44380	707-99-62010	707-35-52740
707-99-45040	707-99-62020	707-35-52750
707-99-45220	707-99-62120	707-35-52760
707-99-45230	707-99-64010	707-99-77050
707-99-45250	707-99-64030	707-99-77090
707-99-45310	707-99-64010	707-99-77120
707-99-45230	707-99-64030	707-99-77130
707-99-45310	707-99-64040	707-99-77160
707-99-46030	707-99-64030	707-99-77160
707-99-64080	707-99-64040	707-99-77190
707-99-64120	707-99-46030	707-99-77220
707-99-64130	707-99-46120	707-99-45310

5. FAQ

Q: There is a D-ring seal in the transmission seal kit ,so Why is it D-shaped instead of O-shaped?
A: Finding a D-ring in a Komatsu transmission kit instead of a standard O-ring is another classic example of engineering around a specific mechanical failure.In a heavy-duty powershift transmission, clutch pistons must stroke back and forth rapidly under high pressure (300PSI to 400 PSI or higher) to engage the gears. If you used a standard round O-ring in this environment, it would quickly fail due to a phenomenon called spiral twisting.Here is exactly why Komatsu relies on the D-shape:

It Stops the Seal from "Rolling" (Spiral Failure)When a transmission clutch piston strokes forward, it exerts massive friction on the seal.The O-ring Problem: Because an O-ring is perfectly round, it wants to roll like a wheel inside its groove when the piston moves. As it rolls, different sections of the ring twist at different rates. This severe twisting cuts and tears the rubber internally, causing it to snap. This is known as spiral failure.The D-ring Solution: A D-ring has a wide, completely flat base on one side and a rounded lip on the other. You install the flat base so it sits tightly against the bottom of the machined groove. This flat footprint anchors the seal, physically blocking it from twisting or rolling when the piston slides past it.
It Resists High-Pressure "Extrusion";When hydraulic oil pressure hits a rubber seal, it forces the rubber toward the tiny clearance gap between the moving metal parts.

Q: What are the most common causes of seal ring failure?
A: Common causes include installation damage like pinching or scratching, contaminated hydraulic fluid causing abrasion, excessive pressure leading to extrusion, and surface defects on mating components that wear the ring over time.

Q: How long do these seal rings typically last?
A: Under normal conditions with clean fluid and proper installation, high-quality PTFE or PU seal rings can last 3,000–6,000 operating hours, depending on the application and cycle rate.

Q: Can I reuse old seal rings?
A: No, it is never recommended to reuse these seal rings. Once installed and exposed to operating conditions, the rings develop permanent wear, deformation, or surface damage. Even if they look fine, they will not form a reliable seal when reinstalled, leading to leaks or pressure loss. Always use new seal rings during every rebuild.

6. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More

WA380-6 S/N

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419-33-21420 4193321420 Machinery Spare Parts Ring Seal FITS FOR WA320-6 WA320-3

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