Fuel Line System Parts Specification

Z08330000019AA

Connection hose of main oil tank and auxiliary oil tank

1. Aging from long-term fuel contact; 2. Abrasion from machine vibration; 3. Damage from extreme temperature fluctuations.

1. Inspect for cracks/bulges monthly; 2. Avoid bending beyond minimum radius; 3. Replace every 12 months in high-temperature environments.

Inner tube: Nitrile rubber (NBR) resistant to diesel; Reinforcement: Polyester fiber; Outer layer: Chloroprene rubber for abrasion resistance.

Z01090100002AA

Fuel filling pipe

1. Corrosion from fuel impurities; 2. Impact damage during refueling; 3. Wear at connection points from repeated disassembly.

1. Filter fuel before refueling to reduce impurities; 2. Avoid rough handling of refueling nozzles; 3. Inspect connection seals quarterly.

Body: Carbon steel (Q235A) with galvanized anti-corrosion coating; Inner surface: Polished to prevent fuel residue buildup.

Z01090300001AA

Fuel returning pipe

1. Clogging from fuel sediment; 2. Fatigue from pressure cycles; 3. Corrosion from condensed moisture in fuel.

1. Clean fuel filter regularly to reduce sediment; 2. Monitor fuel return pressure to avoid overload; 3. Drain moisture from fuel system monthly.

Body: Stainless steel (304) for corrosion resistance; Wall thickness: 1.5mm for pressure resistance; Ends: Precision-threaded.

QBJ11010850

Double tapered thread sub

1. Thread damage from cross-threading during installation; 2. Seal wear from high fuel pressure; 3. Corrosion from fuel additives.

1. Align threads manually before tightening; 2. Use thread sealant compatible with diesel; 3. Torque to ASME B1.20.1 recommended values.

Body: Brass (H62) for good sealing performance; Threads: Tapered precision machining; Surface: Polished to prevent corrosion.

QBJ806080808

Z1'' internal tapered thread tee

1. Uneven pressure distribution leading to cracking; 2. Thread wear from repeated disassembly; 3. Leakage from improper sealing.

1. Ensure uniform torque when connecting all ports; 2. Replace thread sealant after each disassembly; 3. Avoid over-tightening to prevent thread deformation.

Body: Carbon steel (Q235B) with anti-corrosion coating; Threads: Internal tapered for tight seal; Ports: Precision-machined for alignment.

QBJ10010804

Z1''-Z1/2'' bushing

1. Wear from vibration-induced friction; 2. Thread stripping from over-tightening; 3. Corrosion from moisture in fuel lines.

1. Use lock washers to reduce vibration impact; 2. Tighten with torque wrench to avoid overloading; 3. Inspect for rust during routine maintenance.

Body: Stainless steel (304); Threads: Dual-size precision rolled; Surface: Passivated to enhance corrosion resistance.

QBJ6013908

M39X2-Z1" elbow

1. Fatigue from repeated bending stress; 2. Thread damage from misaligned installation; 3. Leakage from seal degradation.

1. Install with proper alignment to reduce bending stress; 2. Replace aging seals annually; 3. Avoid using as a load-bearing component.

Body: Alloy steel (40Cr) with heat treatment; Threads: M39X2 and Z1" tapered; Bend angle: 90° precision forming.

QBJ5012004

M20X2-Z1/2" fitting

1. Seal damage from incompatible fuel types; 2. Thread wear from frequent connection/disconnection; 3. Deformation from impact.

1. Use only with diesel fuel; 2. Inspect thread integrity before reuse; 3. Store in a padded container to avoid impact damage.

Body: Brass (H59) for excellent machinability; Sealing surface: Polished; Threads: M20X2 and Z1/2" tapered.

Z07200000008AA

Hose seat

1. Wear from hose movement; 2. Corrosion from fuel and moisture; 3. Damage from improper hose installation.

1. Ensure hose is fully seated before clamping; 2. Clean seat surface regularly to remove fuel residue; 3. Replace if corrosion or wear is visible.

Body: Carbon steel (Q235A) with zinc plating; Seat surface: Hardened to 55-60 HRC for wear resistance.

4600300002

1" ball valve

1. Seat wear from fuel impurities; 2. Ball corrosion leading to leakage; 3. Handle damage from rough operation.

1. Keep fuel clean to reduce seat wear; 2. Operate handle smoothly (avoid forceful turning); 3. Lubricate valve internals every 6 months.

Body: Cast iron (HT200); Ball: Stainless steel (304); Seat: PTFE for high-temperature resistance; Handle: Carbon steel with painting.

Z01090200001AA

Diesel fuel modification

1. Compatibility issues with existing system parts; 2. Damage from improper installation; 3. Wear from long-term fuel flow erosion.

1. Verify compatibility with equipment model before installation; 2. Follow manufacturer’s installation guidelines; 3. Inspect for leaks after modification.

Main body: Alloy steel (40Cr) with heat treatment; Internal components: Stainless steel (316); Seals: Fluororubber (FKM) for fuel resistance.

P2200320AA

Screw plug, filter

1. Thread wear from repeated filter replacement; 2. Seal damage from improper tightening; 3. Corrosion from fuel moisture.

1. Tighten to recommended torque after filter replacement; 2. Replace seal washer each time; 3. Clean threads before installation.

Body: Carbon steel (Q235A) with zinc plating; Seal: Nitrile rubber (NBR); Threads: Precision tapped.

P2300031AA

Bushing, filter

1. Wear from filter vibration; 2. Corrosion from fuel impurities; 3. Damage from improper filter installation.

1. Ensure filter is properly aligned during installation; 2. Replace when filter is changed (every 5,000 working hours); 3. Inspect for wear during routine maintenance.

Body: Brass (H62) for good sealing; Outer surface: Polished; Inner diameter: Precision-machined for filter fit.

P6002051AA

Support, filter

1. Fatigue from filter weight and vibration; 2. Corrosion from environmental moisture; 3. Damage from impact during machinery operation.

1. Check mounting tightness quarterly; 2. Apply anti-corrosion coating for outdoor use; 3. Avoid placing heavy objects on the support.

Body: Carbon steel (Q345B) with anti-rust painting; Mounting points: Reinforced for load-bearing; Surface: Powder-coated for durability.

P5200054AA

Dual pipe clip

1. Wear from pipe vibration; 2. Deformation from over-tightening; 3. Corrosion from environmental factors.

1. Tighten to secure pipe without compressing it; 2. Install additional clips for long pipe runs; 3. Replace if rust or deformation is detected.

Body: Stainless steel (304); Clip surface: Rubber-lined to prevent pipe damage; Fastening points: Reinforced for durability.

4300506025

Bolt M6X25

1. Thread wear from improper tightening; 2. Fatigue fracture from machinery vibration; 3. Corrosion from fuel and moisture.

1. Tighten with torque wrench (8-10 N·m); 2. Use spring washers to prevent loosening; 3. Apply anti-corrosion grease for outdoor use.

High-strength carbon steel (8.8 grade); Surface: Zinc plating; Threads: Precision rolled for wear resistance.

4309300006

Nut M6

1. Thread wear from repeated use; 2. Loosening from vibration; 3. Deformation from over-tightening.

1. Replace after 3-5 disassembly cycles; 2. Pair with matching M6 bolts; 3. Avoid using pliers (use socket wrench) to prevent damage.

Carbon steel (8 grade); Surface: Zinc plating; Threads: Precision tapped for tight fit.

4313100006

Washer 6

1. Wear from friction with bolt/nut; 2. Deformation from high pressure; 3. Rust from moisture.

1. Use only with M6 bolts/nuts; 2. Replace if flattened or cracked; 3. Clean surface before installation to ensure even pressure.

Carbon steel (Q235A); Surface: Zinc plating; Thickness: 1.0mm for load distribution.

P2200321AA

Hollow bolt

1. Clogging from fuel impurities; 2. Thread damage from cross-threading; 3. Leakage from internal seal wear.

1. Clean internal channel before installation; 2. Align threads manually to avoid damage; 3. Inspect internal seal annually.

Alloy steel (10.9 grade); Internal channel: Precision-drilled; Threads: Tapered for sealing; Surface: Phosphating treatment.

P1000218AA

Seal washer

1. Aging from fuel and high temperature; 2. Damage from improper installation; 3. Deformation from over-tightening.

1. Replace every time the connected part is disassembled; 2. Install without twisting; 3. Avoid over-tightening to prevent material degradation.

Material: Nitrile rubber (NBR) compatible with diesel; Thickness: 1.5mm; Inner diameter: Precision-cut for tight seal.

P1200097AA

Nut, fitting

1. Thread wear from fitting connection/disconnection; 2. Leakage from improper torque; 3. Corrosion from fuel additives.

1. Torque to fitting manufacturer’s recommendations; 2. Inspect threads for damage before reuse; 3. Use thread sealant for fuel system compatibility.

Brass (H62) for good sealing; Threads: Precision tapped; Surface: Polished to resist corrosion.

Z01090000002AA

Connection diagram of fuel lines

1. Physical damage from handling; 2. Fading from environmental exposure; 3. Wear from repeated reference.

1. Store in a protective folder when not in use; 2. Keep away from fuel, oil, and direct sunlight; 3. Make copies for on-site use to preserve the original.

Base material: Heavy-duty coated paper (waterproof); Printing: UV-resistant ink for fade resistance; Size: A3 for clear readability.

How to confirm compatibility of these parts with my fuel line system?

All parts match the Z01090000002AA fuel line connection diagram and 630HP diesel systems. Verify your equipment’s part number (P/N) with the tables above. For further clarity, provide your machinery model for personalized compatibility checks.

What is the recommended maintenance cycle for fuel line parts?

Seals and hoses: Replace every 12 months; Fasteners: Inspect/tighten every 3 months; Filters & related parts: Replace every 5,000 working hours; Valves: Lubricate every 6 months. Adjust based on operating environment (dust, temperature).

How to resolve common fuel line leakage issues?

First, identify the leak source (threads, hoses, seals). Replace aging seals/hoses, re-tighten fasteners to recommended torque, and use diesel-compatible thread sealant. For thread damage, replace the fitting/bolt and ensure proper alignment during installation.