714-07-17941 7140717941 GASKET,UPPER VALVE, Transmission Control Valve Gasket,WA420-3 WA470-3
1. Quick Details of seal 714-07-17941:
| Part NO. | 714-07-17941 |
| Machine | WA300-3A |
| Size | OEM |
| Material | Oil-resistant fiber composite material |
| Type | GASKET |
2. 714-07-17941 parts on group :
| NO. | PART NO. | PART NAME | QTY |
| 714-12-10011 | TRANSMISSION ASSEMBLY | 1 | |
| 714-12-17003 | VALVE ASSEMBLY,TRANSMISSION | 1 | |
| 714-12-17013 | VALVE ASSEMBLY,UPPER | 1 | |
| 1 | 714-07-17111 | BODY,UPPER VALVE | 1 |
| 2 | 714-07-15211 | VALVE,MAIN | 1 |
| 714-07-17500 | VALVE,ASSEMBLY | 1 | |
| 3 | 714-07-17510 | VALVE,QUICK RETURN | 1 |
| 4 | 714-07-17540 | SCREEN | 1 |
| 5 | 714-07-17521 | PLUG,VALVE | 1 |
| 6 | 714-07-17550 | VALVE,TORQUE CONVERTER OUTLET | 1 |
| 7 | 415-15-15470 | PLUG | 1 |
| 8 | 714-01-15440 | SPRING,CHECK | 1 |
| 9 | 04260-01270 | BALL | 1 |
| 10 | 714-07-17360 | VALVE,PILOT | 1 |
| 11 | 714-07-15550 | VALVE,TORQUE CONVERTER OUTLET | 1 |
| 12 | 714-07-15710 | SPOOL | 1 |
| 13 | 714-07-15560 | VALVE,MANUAL | 1 |
| 14 | 07000-12010 | O-RING | 1 |
| 15 | 104-15-25480 | VALVE | 1 |
| 16 | 104-15-25490 | VALVE | 1 |
| 17 | 113-15-25260 | SHIM,0.5MM | 2 |
| 18 | 714-07-17570 | SPRING | 1 |
| 19 | 714-07-17680 | SPRING | 1 |
| 20 | 714-07-15690 | SPRING | 1 |
| 21 | 125-15-15290 | SPRING | 1 |
| 22 | 714-07-17690 | SPRING | 1 |
| 23 | 415-15-15470 | PLUG | 2 |
| 24 | 714-16-17410 | ORIFICE | 1 |
| 25 | 714-07-17170 | COVER,UPPER VALVE | 1 |
| 26 | 714-07-17181 | COVER,UPPER VALVE | 1 |
| 27 | 714-07-17930 | GASKET | 1 |
| 28 | 714-07-17941 | GASKET | 1 |
| 29 | 01010-30825 | BOLT | 8 |
| 30 | 01010-30825 | BOLT | 8 |
| 31 | 01643-30823 | WASHER | 8 |
| 32 | 07040-11812 | PLUG | 1 |
| 33 | 07002-11823 | O-RING | 1 |
| 34 | 419-15-16670 | PLATE,LOCK | 1 |
| 35 | 01643-31032 | WASHER | 1 |
| 36 | 01010-81020 | BOLT | 1 |
| 37 | 07042-80108 | PLUG | 4 |
| 38 | 714-07-15861 | BRACKET | 1 |
3. 714-07-17941 picture:
4. Service part number :
| PART NO. | PART NO. | Part NO. |
| 707-99-48740 | 707-99-52170 | 707-99-66610 |
| 707-99-50500 | 707-99-53100 | 707-99-66660 |
| 707-99-50520 | 707-99-53160 | 707-99-67010 |
| 707-99-50580 | 707-99-53170 | 707-99-67070 |
| 707-99-50620 | 707-99-53270 | 707-99-67090 |
| 707-99-50650 | 707-99-53500 | 707-99-67110 |
| 707-99-50680 | 707-99-54100 | 707-99-67120 |
| 707-99-50740 | 707-99-54140 | 707-99-67121 |
| 707-99-50780 | 707-99-54150 | 707-99-67280 |
| 707-99-52100 | 707-99-66400 | 707-99-67290 |
| 707-99-52160 | 707-99-66600 | 707-99-67300 |
5. FAQ
Q: Hey, I noticed the gaskets in this lower valve assembly diagram. Do you know what materials they’re usually made of?
A: Sure! These are typical hydraulic/transmission valve body gaskets, so the most common materials are non-asbestos fiber composites, rubber-coated steel, and sometimes cork-rubber blends or paper-based materials depending on the application.
Q: Alright, start with the basics. What’s the go-to material here?
A: First up is compressed non-asbestos fiber gasket material, often called “sheet gasket.” It’s made from aramid fibers, mineral fillers, and a nitrile rubber (NBR) binder. Most of the standard gaskets here, like 26 and 28, use this.
Q: And what about extreme conditions? If this valve runs really hot?
A: Then you’d see fluorocarbon rubber (FKM/Viton) or fluoroelastomer-coated gaskets. These resist degradation from high-temperature ATF and synthetic oils way better than standard NBR. They’re common in heavy-duty or high-performance transmissions, where operating temps can push past 130°C.
Q: How to determine whether the Komatsu transmission gasket set needs a full replacement?
Below are practical judgment standards from professional maintenance technicians, easy to understand, and no full disassembly is required.
External visible symptoms (judge without disassembly)
- Oil seepage or oil leakage at the joints of the transmission housing; oil stains, oil sludge accumulation or oil dripping appearing at housing seams, end covers, transmission pump mounting surfaces, and valve cover edges → full gasket set replacement is required.
- If there are transmission oil drops on the ground after parking, and oil seal leakage is ruled out, it is basically caused by aging and failure of the paper gaskets.
- The transmission oil level keeps dropping regularly with no damaged oil pipes found; this is mostly slight seepage from worn paper gaskets. The leak may not be obvious to the naked eye but causes continuous oil consumption.
6. Exhibition and Wearhous
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