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124-3240
CAT
Part Number 1243240 (124-3240) is a chrome-plated articulating hitch pin (also known as a linkage pin) designed for Caterpillar heavy-duty construction machinery.
Primary Function
Facilitates rotational movement between machine frames: Acting as a pivot pin, it connects the front and rear frames, enabling the motor grader to execute articulated steering—thereby enhancing the machine's maneuverability and reducing its turning radius.
-Key Application Locations:
- Articulating Hitch Group Assembly: Its primary application; typically installed at the Upper Hitch Point to facilitate the connection and rotational movement between the front and rear frames.
- Motor Grader Steering System: Used at hydraulic cylinder connection points.
- Other Linkage or Chassis Pivot Points: Applicable wherever rotational pivoting is required within the linkage or chassis structure.
Product Features and Advantages:
- Chrome-Plated Surface: Enhances wear resistance and corrosion resistance, thereby extending the product's service life.
- High-Strength Steel: Heat-treated to withstand heavy impact loads and repetitive rotational stress.
- Precision-Engineered: Matches original equipment (OEM) dimensions precisely, ensuring direct installation without the need for modifications.
This component is a chrome-plated straight pin; its chrome surface treatment significantly boosts its resistance to wear and corrosion, making it ideal for long-term use in harsh operating environments.
Compatible Equipment
Primarily used on Caterpillar Motor Graders:
- Common Models: 12H, 120H, 120, 140H, 140, 160, 163, 143, etc. (Also applicable to specific configurations within the K-Series, such as the 12K, 140K, and 160K).
Typical Applications
- Road Construction and Grading: Motor graders require frequent articulated steering to precisely control blade angles and travel paths; this pin ensures smooth and stable steering performance.
- Earthmoving, Mining, and Maintenance: Maintains the machine's structural integrity and grading precision in harsh environments characterized by heavy loads, vibration, mud, and debris. - Repair and Replacement: Classified as high-wear consumable parts (Wear Items), regular inspection and replacement help prevent loosening, abnormal noises, or a decline in precision, thereby avoiding extensive rework caused by minor components.

| Caterpillar pin and bushing | |||||||||
| OEM | OEM | OEM | OEM | OEM | OEM | OEM | OEM | OEM | OEM |
| 4385850 | 4I4811 | 7K9343 | 5346337 | 2G8622 | 2417381 | 7K9591 | 1372817 | 9V3852 | 3V2337 |
| 2299247 | 2641702 | 7K9347 | 5356287 | 2G8614 | 2285615 | 7P3454 | 2081959 | 2K4502 | 9C0093 |
| 3735700 | 4I4809 | 9R4677 | 5356344 | 2G8735 | 2417380 | 7Y2396 | 2096181 | 7K9640 | 4E3196 |
| 3792693 | 4I4621 | 1883064 | 4I4618 | 8D4673 | 2417379 | 1372819 | 2285619 | 1V9148 | 7K9513 |
| 3792813 | 1762278 | 2375330 | 2343803 | 2G8609 | 2357772 | 7Y3427 | 2291091 | 1V7001 | 9C3581 |
| 4368990 | 4I4812 | 3607295 | 1865662 | 2G8617 | 2285654 | 1372919 | 2370944 | 1V8241 | 1188267 |
| 4385844 | 3150800 | 3735760 | 0875805 | 2K6413 | 2402914 | 7Y3428 | 2402916 | 2V4876 | 1188269 |
| 4385846 | 2602390 | 3792545 | 2543053 | 5K0990 | 2V0707 | 1433841 | 2417280 | 3J6484 | 6K7165 |
| 4385847 | 1807752 | 3792546 | 2543052 | 6K8308 | 3T0996 | 8E6752 | 2627043 | 4K6780 | 6K8307 |
| 5356345 | 2512537 | 3792689 | 2285614 | 2909181 | 1024560 | 8K0533 | 2627044 | 5K0987 | 5V1510 |
| 5228212 | 4I4620 | 3792690 | 2285617 | 2357770 | 8X0742 | 9J5875 | 2785454 | 7J1338 | 5V1508 |
| 5228227 | 1893922 | 3792769 | 2343811 | 1V7038 | 2370945 | 9R0413 | 2787695 | 8K5757 | 9K9731 |
| 5228230 | 1865730 | 4177570 | 4I6718 | 1857220 | 2343749 | 9R4110 | 4I6897 | 9T8676 | 5V1514 |
| 5228232 | 2343931 | 2402913 | 4T1422 | 2285621 | 7Y9915 | 9R7891 | 1461843 | 990718 | 5K8265 |
| 5228329 | 1865663 | 2357769 | 4V8519 | 875533 | 1985529 | 9R9475 | 9R0162 | 9R0147 | 4K8561 |
| 5230026 | 2602385 | 2402912 | 4V8675 | 875548 | 2487835 | 9R9505 | 9R3092 | 9R0614 | 3J3953 |
| 5230028 | 1865637 | 2444360 | 5K0984 | 875847 | 2487857 | 9T2883 | 9R5828 | 9R0321 | 3W8398 |
| 5230037 | 2343930 | 2417382 | 5K3490 | 990721 | 2291092 | 4893010 | 9R1107 | 9R0170 | 4I4665 |
| 5233719 | 8W5293 | 2291096 | 7J1335 | 1066872 | 2291095 | 2G8633 | 9R1104 | 9R0111 | 4K4709 |
| 5J1193 | 5V1874 | 4181948 | 9R0153 | 5846308 | 9R0411 | 4T0208 | 9J7099 | 7V8633 | 6G5537 |
| 4V1901 | 7K9593 | 1J2303 | 1483381 | 4K6558 | 9C1484 | 6K8316 | 4V8534 | 121460 | 7D3807 |
| 5233721 | 2G8630 | 2444277 | 7J9682 | 1164825 | 4V8673 | 1353161 | 6K8314 | 9J7100 | 6K2703 |
| 9R0320 | 4832755 | 6K4076 | 9R5246 | 2G8624 | 7K0421 | 1680480 | 2582305 | 9J7078 | 3575717 |
| 3399833 | 4V7105 | 7Y2395 | 9R7960 | 7K0085 | 7K0086 | 6K4148 | 1U2182 | 7Y4939 | 3575711 |
| 6K6185 | 4V7101 | 2136683 | 9T3165 | 4J6374 | 7K9603 | 3G7570 | 6J2225 | 875379 | 3575712 |
| 8W6476 | 4V7099 | 2366271 | 2136682 | 8D7083 | 7J9365 | 9R1917 | 3K2132 | 4K6781 | 7V6716 |
| 5V1511 | 8V7659 | 4V8520 | 2136687 | 1461842 | 5J1192 | 9R1495 | 1633749 | 4K8659 | 4V6421 |
| 9R6690 | 1V8957 | 2003926 | 2368158 | 2G8608 | 7J9346 | 9R0140 | 2366270 | 4V2873 | 1386674 |
| 9R5922 | 1386685 | 2580769 | 2785455 | 6S3463 | 7K9604 | 2332613 | 3J9511 | 5V1386 | 3P8845 |
| 2136703 | 1361711 | 3G7624 | 2867166 | 7K0084 | 4V0381 | 2744274 | 0967912 | 1V8242 | 1369371 |
| 3419483 | 1V8439 | 3G8779 | 2G8737 | 2K4505 | 3G5999 | 9R0204 | 1195200 | 3G4704 | 1369380 |
| 3S7987 | 3V6648 | 4T9751 | 7K9592 | 7K0087 | 3P2429 | 2368183 | 0967911 | 3V2333 | 2582308 |
| 5S7944 | 2V4700 | 7K9601 | 1261956 | 7K9549 | 4K8734 | 7K9644 | 1297770 | 7J9842 | 3T9658 |
| 4V8674 | 2A7089 | 7K9639 | 7H4710 | 9D0733 | 7J9366 | 1832358 | 967913 | 4V2872 | 7T7190 |
| 1V8240 | 2G8631 | 8J6384 | 7K6365 | 7K9642 | 7K9643 | 9R1493 | 2366268 | 7Y5102 | 8D8829 |
| 2V0706 | 6T4481 | 7Y2397 | 4K5174 | 8D7426 | 4V0380 | 9R2700 | 4I0453 | 7Y3552 | 8J0001 |
| 1V9143 | 4443882 | 7Y3551 | 3G2581 | 6J7175 | 7K9638 | 9R1494 | 4I4666 | 0969512 | 8J9926 |
| 1355553 | 1185982 | 9R0139 | 8D7282 | 7J9699 | 8K6276 | 2517320 | 2366269 | 1195228 | 9C4007 |
| 6A7099 | 2372252 | 9R0430 | 8D9296 | 9D0178 | 8K2896 | 4T7351 | 1195325 | 1289882 | 9C7727 |
| 8D7084 | 9T0766 | 9R1496 | 8D7284 | 9D3311 | 9K8425 | 7Y6389 | 2402915 | 7Y3553 | 9K9156 |
| 3311520 | 2201013 | 9R3747 | 6K2899 | 8D7996 | 7T3746 | 6E3535 | 7Y4666 | 7Y6608 | 2131366 |
| 3311522 | 2787066 | 9R4062 | 7J9688 | 9D1511 | 9J4543 | 2096855 | 3G0707 | 1523735 | 3478175 |
| 3625027 | 2136702 | 9R0431 | 7K0088 | 7J9344 | 7J2604 | 8G8311 | 3G5281 | 1523739 | 1428791 |
| 9R3700 | 9R3756 | 9R3812 | 7K9589 | 7K9590 | 9K9158 | 1372818 | 3J6412 | 1857221 | 7K9493 |
| 4832757 | 7Y5128 | 9R4108 | 8D7086 | 8D8168 | 9T4007 | 7V6715 | 6K4185 | 2142255 | 3V8439 |
| 7P3194 | 6K7164 | 2K8530 | 1048655 | 7T4865 | 9V3853 | 9U8482 | 2366273 | 2099887 | 1183064 |
| 2534635 | 2G8621 | 2417342 | 7Y0661 | 7T6427 | 5M6211 | 3003930 | 3611702 | 1350013 | 3419484 |
| 5M3947 | 8D4766 | 4T7534 | 2512547 | 2827781 | 5177538 | 2908226 | 1090367 | 2602492 | 1386679 |
| 2572291 | 1487871 | 1245741 | 2417231 | 2827785 | 7D3009 | 5V1882 | 2284093 | 6Y8248 | 9W7006 |
| 5M6210 | 2487820 | 1036293 | 8X5106 | 2120136 | 4T0202 | 4T0203 | 3209164 | 1745696 | 2169724 |
| 3166952 | 4950675 | 1U0872 | 4T1389 | 1590960 | 4251825 | 3166945 | 1327994 | 9J9055 | 2477631 |
| 3166951 | 1305451 | 9J9598 | 1044817 | 3166946 | 2136710 | 1301918 | 1245233 | 2085026 | 1732769 |
| 3209241 | 1251037 | 1564078 | 3407503 | 3615903 | 1841413 | 2096850 | 6Y3545 | 2399940 | 6E1166 |
| 3285234 | 3863778 | 1090958 | 1U0612 | 3260089 | 3311521 | 4380593 | 9W9243 | 1U0873 | 3T4020 |
| 2357771 | 4I9751 | 7J1337 | 5J7876 | 1545280 | 7Y3550 | 4T0204 | 2641180 | 8K5334 | 3005440 |
| 3G8051 | 2847313 | 4I9751 | 7V8632 | 3100851 | 1243240 | 9P6912 | 2218640 | 2195735 | 5649028 |
| 2037326 | 4V6875 | 2572289 | 2213200 | 5T5947 | 1545277 | 2195743 | 6J9480 | 2950775 | 3439295 |
| 2588502 | 7J1336 | 3204597 | 1G8169 | 1703093 | 1545278 | 1412150 | 3G7016 | 3G8932 | 2357642 |
| 2V5715 | 3478176 | 1129629 | 3J7189 | 6J9482 | 1545279 | 2558239 | 4T9762 | 1U2472 | 4V2588 |
| 3875919 | 2213198 | 2G7387 | 2G7388 | 7P6893 | 2G8661 | 1944175 | |||
>> Partial Applicable Vehicle Model Display


Excavator bushing
Excavator pin
Loader bushing
Loader pin
Construction machinery pins and bushings
Part Number 1243240 (124-3240) is a high-strength, chrome-plated hitch pin designed for Caterpillar equipment. It is specifically engineered for the articulation systems of heavy-duty motor graders, where it must withstand high loads, repetitive rotational stress, and harsh operating conditions.
Key Material Specifications
- Base Material: Steel—specifically including Carbon Steel and Boron Steel.
- Processing: Manufactured from high-strength alloy steel and subjected to heat treatment to enhance tensile strength, toughness, and fatigue resistance. The surface hardness is engineered to resist premature wear.
- Surface Treatment: Chrome Plating.
Most aftermarket parts and common market versions feature a chrome-plated finish (Chromed Pin), which significantly improves wear resistance, corrosion resistance, and surface hardness.
- Additional Features: Includes an internal lubrication channel (Greased-through pin) to facilitate maintenance, and a puller hole to simplify installation and removal.
Material Advantages
- High Strength & Durability: Heat-treated Boron Steel or low-alloy steel provides exceptional impact resistance, fatigue resistance, and load-bearing capacity, making it ideal for high-stress areas such as the articulation steering joints of motor graders.
- Chrome-Plated Surface: Enhances wear resistance and rust prevention, extends the service life of the pin-and-bushing interface, and minimizes corrosion in demanding jobsite environments involving mud, sand, or moisture.
- Overall Performance: Precision-machined to ensure exact dimensional matching with OEM specifications, allowing for direct replacement and maintaining the smooth operation and precision of the equipment's articulation steering system.


Production Flow Chart


Q1:What are the main products that the company manufactures and sells?
A1:。We mainly produce pins and bushings for construction machinery, including pins and bushings for various types of construction vehicles such as loaders, excavators, and graders. We also supply parts for various brands of vehicles, including Caterpillar, Komatsu, Sany, Hyundai, XCMG, Lingong, and Liugong.
Q2:Can you provide customized services?
A2:We are a professional manufacturer with our own team of engineers and production equipment, and we can provide you with high-quality customized services.
Q3:What are the main materials used for pins and bushings?
A3:The main materials include:45C、41Cr4、42CrMo4、35CrMo4、20CrMo44、View more→
Q4:How can I get a quote?
A4:You can provide OEM specifications, drawings, or other detailed requirements, and we can provide you with a quote based on this information. Please feel free to inquire at any time.
Q5:Do you provide after-sales service for excavator pins and bushings?
A5:We provide high-quality after-sales service, including product guidance, warranty service, and troubleshooting assistance, to ensure continuous operation.
Q6:Can you ship to international locations?
A6:Yes, we can deliver high-quality excavator pins globally, providing efficient transportation and timely delivery.
Q7:Are your pins, bushings, and other parts compatible with various brands of excavators, loaders, and other construction machinery?
A7:Our pins and bushings are designed specifically for various construction machinery, including Caterpillar, Komatsu, Sany, Hyundai, XCMG, Lingong, and Liugong, and we can also provide customized services according to your needs.





