Product Description:
| OE NO | 10R-1257 |
| OE NO1 | 1786342 |
| Material | Original new CAT INJECTOR |
| ENGINE | CAT engine |
| Car Model | CAT |
Working Principle of CAT 3126 HEUI Injector
The 10R-1257 / 10R1257 injector belongs to the HEUI-style diesel injection category used in CAT 3126 series engines. HEUI stands for Hydraulic Electronic Unit Injector. In this type of system, engine oil pressure is used to intensify fuel pressure inside the injector, while electronic control manages injection timing and fuel delivery. Supplier descriptions for 10R1257-type injectors describe electronically controlled delivery for improved combustion efficiency and stable engine performance.
Bosch's public technical pages describe unit injector technology as a system where the nozzle holder assembly integrates high-pressure generation and fuel injection, and Bosch also explains that diesel injection nozzles strongly influence engine performance, exhaust behavior and combustion noise. This supports the technical explanation of injector performance, but not a Bosch-to-10R1257 cross number.
|
Item |
Description |
|
Product Name |
Caterpillar CAT 3126 Series HEUI Diesel Fuel Injector |
|
Main Part Number |
10R-1257 |
|
Search Format |
10R1257 |
|
Cross Reference Numbers |
178-6342, 1786342, 177-4762, 1774762, 229-5928, 2295928, 177-4752, 1774752 |
|
Product Type |
Diesel Fuel Injector / HEUI Injector / Reman Fuel Injector |
|
Brand Application |
Caterpillar / CAT |
|
Engine Application |
CAT 3126, 3126B, 3126E, supplier-listed 3126A / 3126 series applications |
|
Fuel Type |
Diesel |
|
Condition Options |
Remanufactured, rebuilt, aftermarket replacement, exchange injector |
|
Common Sales Unit |
Single injector or set of 6 injectors |
|
Core Charge |
Often required in reman market, depending on supplier policy |
|
Main Market |
North America, South America, Europe, Middle East, Southeast Asia, Africa, Australia |
|
Buyer Types |
Diesel repair shops, fleet maintenance companies, engine rebuilders, equipment owners, parts distributors |
|
3126 |
||||||||
|
0R-8633 |
1OR-0781 |
1OR-1267 |
1OR-9239 |
2C0273 |
4CR0197 |
10R-0781 |
10R-0782 |
10R-1257 |
|
10R-1262 |
10R-1306 |
10R-9237 |
10R-9239 |
10R-9348 |
20R-0758 |
20R-8758 |
111-7916 |
116-7150 |
|
128-6601 |
131-7150 |
135-5459 |
138-8756 |
153-5938 |
155-1819 |
155-8723 |
156-8895 |
162-0218 |
|
162-9610 |
169-7408 |
169-7410 |
169-7411 |
171-9704 |
171-9710 |
173-4059 |
173-9267 |
173-9268 |
|
173-9272 |
173-9379 |
174-7526 |
174-7527 |
177-4752 |
177-4753 |
177-4754 |
178-0199 |
178-6342 |
|
178-6432 |
179-6020 |
180-7431 |
183-6797 |
188-1320 |
196-4229 |
198-4752 |
198-6605 |
198-6877 |
|
218-4109 |
222-5963 |
222-5965 |
222-5966 |
222-5967 |
222-5968 |
222-5972 |
232-1168 |
232-1170 |
|
232-1171 |
232-1173 |
232-1183 |
495-0327 |
OR-9350 |
||||
caterpillar Fuel Injector Series - Engine - Equipment Appliccccation Table
| Fuel Injector / Engine Series | Common Injection Technology | Corresponding Engine Platform | Common ccccat Models / Equipment Platforms |
| 3116 Series | Mechanical Injection / Early Electronic Platform | 3116, 3116T, 3116TA, 3116DIT | M318, M320 Wheel Excavators; 135H Motor Grader; D6M Dozer |
| 3126 / 3126B Series | HEUI | 3126, 3126B | 120H Motor Grader; 950G Series II Wheel Loader; 950G Platform |
| 3126E Series | HEUI | 3126E | Commonly used in medium-duty construction and industrial platforms similar to the 3126 appliccccation range |
| C6.4 Series | ACERT Injection Platform | C6.4 ACERT | 320D / 320D L; 323D L / LN; 320D LRR; 320D FM |
| C6.6 Series | ACERT Injection Platform | C6.6 ACERT | 320D / 320D L (C6.6 versions); 320E LN; 323E LN |
| C7 Series | HEUI | C7, C7 ACERT | 120K Motor Grader; 950H Wheel Loader |
| C7.1 Series | Common Rail / Later Electronic Injection | C7.1, C7.1 ACERT | 320D2 / D2 L, 326D2, 330D2 Excavators; 950K, 950, 962, 930M Wheel Loaders; Generator Sets |
| C9 Series | HEUI-B | C9, C9 ACERT | 330D / 330D L / 330D MH; construction and industrial platforms |
| C10 Series | Electronic Unit Injection Family | C10 | 140H, 143H, 160H, 163H, 14H, 16H Motor Graders; 814F Wheel Dozer; 815F Compactor; 816F Landfill Compactor; 966G II, 972G II Wheel Loaders; D7R II Dozer; 725 / 730 Articulated Trucks; R1600G, R1700G LHD; W345B II Wheel Excavator; 345B / 365B Excavators |
| C12 Series | Electronic Unit Injection | C12, C12 Marine | Widely used across 140H, 143H, 160H, 163H, 14H, 16H; 966G II, 972G II; D7R II; 725 / 730; W345B II; 345B / 365B; also widely used in marine appliccccations |
| C13 Series | MEUI | C13, C13 ACERT | 345D L Excavator; 730C EJ Articulated Dump Truck; Generator Sets; Industrial Power Platforms |
| C15 Series | MEUI | C15, C15 ACERT | 770 Off-Highway Truck; 374D L / 374F L Excavators; 365C Demolition Excavator; R3000H LHD; Industrial Power and Generator Sets |
| 3406E Series | EUI | 3406E | AD30 Underground Mining Truck; 16H Motor Grader; 824G Series II Wheel Dozer; 826G Series II Landfill Compactor |
| C18 Series15 | EUI / Later Electronic Injection Platform | C18, C18 ACERT | Generator Sets; Marine Appliccccations; Large Industrial and Mining Platforms |

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