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Description
Heavy-Duty Gear Case Cover 3958112 for Cummins 6C8.3, B3.3, B4.5, B6.7, Hyundai ExcavatorReplacement part number: 3958112 Fit For Cummins Engine: 6C8. 3, B3. 3, B4. 5, B6. 7 CM2350 B121B, C GAS PLUS CM556, ISB6. 7 CM2250, ISBE4 CM850, ISC CM2150, ISC CM850, ISC8. 3 CM225, ISC8. 3 G CM2180 C101, ISF2. 8 CM2220 F122, ISF3. 8 CM2220, ISL CM2150, ISL CM850, ISL G CM2180, ISL8. 9 CM2150 L110, ISL8. 9 CM2880 L112, ISL8. 9 CM2880 L140, ISL9 CM2150 SN, ISL9 CM2250, ISL9 CM2350 L101, ISL9 CM2350 L111, ISL9. 5 CM2150 SN, ISL9. 5 CM2880 L138, ISLE4
Replacement part number:
3958112Fit For Cummins Engine:
6C8.3, B3.3, B4.5, B6.7 CM2350 B121B, C GAS PLUS CM556, ISB6.7 CM2250, ISBE4 CM850, ISC CM2150, ISC CM850, ISC8.3 CM225, ISC8.3 G CM2180 C101, ISF2.8 CM2220 F122, ISF3.8 CM2220, ISL CM2150, ISL CM850, ISL G CM2180, ISL8.9 CM2150 L110, ISL8.9 CM2880 L112, ISL8.9 CM2880 L140, ISL9 CM2150 SN, ISL9 CM2250, ISL9 CM2350 L101, ISL9 CM2350 L111, ISL9.5 CM2150 SN, ISL9.5 CM2880 L138, ISLE4 CM850, L GAS PLUS CM556, L8.9 CM2880 L146G, L8.9G CMOH2.0 L125B, L9 CM2350 L116B, L9 CM2350 L119B, L9 CM2350 L120C, L9 CM2350 L123B, L9 CM2350 L129C, L9 CM2350 L133C, L9 CM2450 L126B, L9 CM2670 L128B, L9 CM2670 L132B, L9 CM2670 L134C, L9 CM2670 L135C, L9 CM2670 L136C, L9 CM2670 L137C, L9N CM2380 L124B, L9N CM2380 L130B, L9N CM2380 L142B, NH 855, NT 855, QSB3.3 CM2150, QSB6.7 CM850, QSB6.7 CM2850, QSC8.3 CM2880 C102, QSC8.3 CM850, QSC8.3 CM2850, QSC9 CM2250, QSL9 CM2250, QSL8.9 CM2150 L141, QSL9 CM2250 L115, QSL9 CM2350 L102, QSL9 CM2350 L118, QSL9 CM850, QSL9 CM2850, QSL9 QSL9.3 CM2880 L113
Application:
Fit For Hyundai Excavator: R320LC-7A, R320LC-9
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.2 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Great toys for aggressive chewers
Size: Medium/Large, Color: Turkey Day Drumstick - Large
These are great toys they last a while they are destroyed after a while but both dogs are aggressive chewers but they last about a year and a half. And they are go to toys they have one that is a shark mouth and they love it I have bought 4. (two of them the pups lost ).
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Reviewed in the United States on December 20, 2025
★★★★★ 4
Durable and Fun, Just Gets a Bit Rough
Size: Medium/Large, Color: Chopper - Large
This is a really good toy overall, especially if you have dogs that love to chew. My dogs were immediately into it—they play with it nonstop, toss it around, and stay entertained for a while, which I love. It definitely holds up better than most toys we’ve tried.
The only reason I’m giving it 4 stars instead of 5 is because over time it does start to fray a bit and gets a little rough, especially with heavy chewing. It’s not completely indestructible, but it still lasts longer than a lot of other toys.
Overall, still a great buy and I would recommend it if your dogs need something tough but fun!
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Reviewed in the United States on April 4, 2026
★★★★★ 5
Worthwhile!
Size: Medium/Large, Color: Turkey Day Drumstick - Large
I have a small dog with a really strong bite! Usually have to buy toys that are meant for bigger dogs. This has lasted us for what feels like forever. It does sound very heavy when dropped! My dog loves it though! Would definitely recommend!
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Ohhh Mr. Iguana
Size: Medium/Large, Color: Illana the Iguana - Large
Mr. Iguana is a house favorite! I got my first one of these in a barkbox and my dog loved it so much, i went on the hunt for another one. Amazon saved the day! I own about 7 of these now. They are prefect for dogs just love to chew, they hold up great! And they are heavy duty, super easy to clean! My dogs are very happy, great value for the money! Doesn't have a smell, vibrant colors! Noise level is quiet, minus my dogs chewing !
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Reviewed in the United States on August 13, 2025
★★★★★ 3
Not for strong chewers
Size: Medium/Large, Color: Dog Ness Monster - Large
Initially, I really liked this for my dog. She is about 8 months old and still loves to chew and destroys most toys in a few minutes. When we got this, it seemed like it would hold up for a while despite being clearly gnawed on. Unfortunately, once she focused on the softer "water" portion of the toy, that is where things went downhill with this toy. After a few short chew sessions, she was tearing chunks out of it. We had purchased a replacement since she liked the original so much, and after about 5 minutes with the replacement, she had taken enough out of the blue section that we immediately threw that one out as well. Overall while the green portion held up, the blue didn't. I can't recommend this for strong chewers.
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Reviewed in the United States on December 8, 2025
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