Professional Fuel Filter Diesel Replacement 1R1804 1R-1804 1R0794 1R-0794

What equipment is the 1R-1804 fuel filter compatible with?

• CARMIX CARMIX 25 FXCARMIX 2.5 TTD 6
• CATERPILLAR
315 CLAP 300CB 434 DCD 54CP 11CP 11 GCCS 10 GCCS 11CS 11 GCCS 12CS 433 CCS 533 E-AWDE 110 E2DE 65 E3DE 88 E0GEP 88-1M 313 CM 315 CM 315 CPS 300 CTH 220 BTH 220 BTH 220 BTH 305 BTH 305 BTH 330 BTH 330 BTH 330 BTH 336TH 336TH 337TH 337TH 337TH 340 BTH 340 BTH 350 BTH 560 BTH 560 BTH 580TH 580TH 580 BXQE 60-2
• CEPPARO  CA 4 RM
• CHALLENGER  MT 425 B AUTO POWERMT 425 B POWER SHUTTLEMT 445 B AUTO POWERMT 445 B POWER SHUTTLEMT 455 B AUTO POWERMT 455 B POWER SHUTTLEMT 465 BSPRA COUPE 115 BSPRA COUPE 85 B
• CLAAS  AXOS 310AXOS 320AXOS 330AXOS 340

Professional Fuel Filter Diesel Replacement 1R1804 1R-1804 1R0794 1R-0794

Q: How do I know if my diesel fuel filter is bad?

To check if the diesel filter is damaged, evaluate vehicle symptoms, filter condition, and maintenance records.

When the diesel filter clogs or fails, the engine shows these signs:

• Power drops: Acceleration feels weak, climbing hills becomes harder, combustion efficiency declines due to low fuel supply.
• Starting issues: Takes longer to start or fails to start, impurities and moisture disrupt fuel atomization.
• Fuel use rises: Incomplete combustion lowers fuel economy.
• Exhaust changes: Black smoke from the tailpipe signals a rich fuel mixture.
• Noise increases: Fuel system problems worsen mechanical friction sounds.
• Warning lights: The engine control unit alerts when oil pressure readings are abnormal.

Inspect the filter using these methods:

• Look at the surface: Replace the element if it's dirty, corroded, or damaged.
• Check the color: A very dark filter indicates severe contamination and needs prompt replacement.
• Monitor pressure: Use a gauge to measure inlet-outlet pressure difference; rising values suggest reduced filtration.
• Observe flow: Slow or reduced diesel movement points to clogged filter cartridges.

Maintenance timing: Consider replacement after 10000 to 20000 kilometers. Follow the vehicle manual for specifics, adjust for poor diesel quality, and account for actual driving conditions.

Q: What does the 1R-1804 filter do?

The 1R-1804 filter is a fuel water separator designed specifically for Caterpillar equipment, primarily used in fuel systems. Its core function is to remove moisture and impurities from the fuel. ‌
In terms of specific functions, this filter can effectively separate and remove free water and 90% emulsified water from fuel, while filtering out smaller pollutants, thereby reducing wear on precision components and extending the service life of key components such as fuel filters and injectors. ‌
In terms of applicability, as an original accessory of Caterpillar equipment, it is an integrated component of the fuel system, designed specifically for various types of engines, excavators, loaders and other construction machinery to ensure efficient system operation. ‌

Q: What happens if I don't replace the fuel filter?

Failure to replace the fuel filter regularly can lead to a decline in fuel system performance, affect engine operation, and potentially cause more serious issues.

A clogged fuel filter can directly affect the fuel supply system, leading to reduced fuel pressure and insufficient fuel delivery. This manifests as decreased engine power, idle shaking, weak acceleration, and even difficulty starting (possibly requiring multiple attempts). During driving, it may also cause stalling, particularly on mountain roads or at high speeds, posing safety risks.
Reduced combustion efficiency can lead to carbon buildup. When impurities clog the filter, poor fuel atomization results in an imbalanced air-fuel mixture and incomplete combustion, causing excessive carbon deposits. These deposits can contaminate spark plugs, oxygen sensors, and catalytic converters, increasing the risk of emissions exceeding standards and further compromising engine stability.

Internal engine components may be damaged by impurities. When contaminants and moisture enter the combustion chamber, they can accelerate the wear or corrosion of precision parts such as cylinders and pistons, shortening the engine's lifespan. Additionally, clogged filters increase the load on the fuel pump, which may lead to pump failure over time, resulting in higher repair costs.
Fuel economy and driving experience will deteriorate. Poor fuel supply leads to increased fuel consumption, sluggish power response, weak acceleration when climbing or carrying heavy loads, and reduced convenience in daily use.

The replacement cycle should be adjusted based on the vehicle model and fuel quality, with a general recommendation of every 20,000 to 60,000 kilometers. External filters (common in older models) have a shorter lifespan and require replacement at approximately 20,000 to 30,000 kilometers, while internal filters (often found in newer luxury vehicles) last longer, up to 60,000 kilometers or 6 years. If frequently using lower-quality fuel, the replacement interval should be appropriately shortened.