FAW J6P Oil Filler Cap & Dipstick: 18 Critical Parts for a Clean & Sealed Engine

Welcome to this expert deconstruction of the FAW J6P Oil Filler Cap and Dipstick system (Chapter 16). This is the complete “Oil Service Port” assembly for the engine on the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

This 18-component group is not just a cap; it is a complex “Logic Assembly” that also includes the ‘Oil dipstick assy’ (Comp 6).

The “logic” of this system is twofold: First, the FAW J6P Oil Filler Cap (Comp 1) provides a large, secure, and contaminant-free port for adding oil. Second, the ‘Oil dipstick’ (Comp 6) provides the means for accurate level measurement.

The “Durability Logic” is the most critical feature of this entire assembly. In a heavy-duty dump truck, the engine vibrates violently. A simple, unsupported filler neck or dipstick tube would fracture from metal fatigue in weeks. This FAW J6P Oil Filler Cap and dipstick system is a complex, multi-bracket assembly designed to *flex* and *move*. It uses a ‘Front support’ (Comp 4), ‘Rear support’ (Comp 10), and a ‘Soft hose’ (Comp 17) to create a system that is both rigid *and* isolated from the engine’s worst vibrations. This protects the FAW J6P Oil Filler Cap assembly from premature failure.

This technical guide is an essential resource for fleet technicians, engine specialists, and parts managers. We will deconstruct the entire 18-component-type group. We will analyze the “Oil Filling Logic” (the FAW J6P Oil Filler Cap, tube, and hose), the “Measurement Logic” (the dipstick and its guide tube), the critical “Structural Support Logic” (the multiple brackets that prevent fatigue), and the “Fastener & Securing Logic” that holds the entire FAW J6P Oil Filler Cap assembly together.

Core 1: The “Oil Filling” Logic (The FAW J6P Oil Filler Cap System)

This group’s “logic” is to provide a large, secure, and flexible port for adding new oil to the engine. This is the primary function of the FAW J6P Oil Filler Cap assembly.

1. Component: ‘Oil filler cap assy’ (1009085-50A)
This (Comp 1) is the “Primary Sealing Logic.” It is a complete assembly that includes the ‘Oil filler cap’ (1009086-50A) and its ‘Gasket’ (1009087-50A). Its “logic” is to be a “positive-lock” seal. It must be easy to open but must also provide a 100% airtight seal when closed. This is essential for the engine’s “Positive Crankcase Ventilation” (PCV) system, which relies on a sealed crankcase to work correctly. A leaking FAW J6P Oil Filler Cap is an “unmetered” air leak that can cause poor performance and oil leaks elsewhere.

2. Components: ‘Oil filler tube’ (1009089-50A) & ‘Oil filler soft hose’ (1009082-50A)
This is the “Flex Logic” and the core of the filler system’s durability. The ‘Oil filler tube’ (Comp 2) is the rigid, metal “neck” that the FAW J6P Oil Filler Cap (Comp 1) attaches to. This tube, however, does not connect directly to the engine. It connects to the ‘Oil filler soft hose’ (Comp 17). This “logic” is intentional: the rigid tube is secured to the stable ‘Front support’ (Comp 4), while the “soft hose” flexes and moves with the vibrating engine. This isolates the rigid components from vibration, preventing cracks.

3. Components: ‘Clamp – B type’ (CQ67645B)
The list calls for two (2) of these clamps (Comp 16 & 18). Their “logic” is to provide a 360-degree, high-pressure seal at both ends of the ‘Soft hose’ (Comp 17), ensuring no oil can leak from these joints. This is a critical part of the FAW J6P Oil Filler Cap‘s plumbing.

Core 2: The “Measurement” Logic (The Dipstick Partner)

This group’s “logic” is to provide an accurate oil level check, acting as the “service partner” to the FAW J6P Oil Filler Cap.

1. Component: ‘Oil dipstick assy’ (1009095-50A)
This (Comp 6) is the core ‘FAW J6P Oil Dipstick’. Its “Measurement Logic” is its precise calibration, with “MIN” and “MAX” marks that correspond to the exact oil level in the ‘Oil pan assy’. Its “Sealing Logic” is its handle, which features one or more O-rings. This is critical: it doesn’t just rest in the tube; it “plugs” it, preventing crankcase pressure from escaping and stopping dirt and water from entering the engine.

2. Component: ‘Oil dipstick tube assy’ (1009090-50A)
This (Comp 8) is the “Guide Logic.” This rigid metal tube provides a clean, safe path for the ‘Oil dipstick’ to travel from the top of the engine all the way down into the oil pan. Its “logic” is to bypass all moving parts like the crankshaft counterweights. It must be perfectly sealed at the engine block to prevent a massive oil leak. This tube is a key part of the same service assembly as the FAW J6P Oil Filler Cap.

Core 3: The “Structural Support” Logic (The Brackets)

This is the “Anti-Fatigue Logic.” A long, unsupported tube (like the dipstick or filler tube) will be destroyed by engine vibration. This FAW J6P Oil Filler Cap and dipstick assembly uses a “tripod” of brackets to create a robust, stable structure.

1. Components: ‘Front support’ (1009083-50A) & ‘Rear support’ (1009084-50A)
These two brackets (Comp 4 & 10) form the primary support for the rigid ‘Oil filler tube’ (Comp 2). The ‘Front support’ holds the “neck” of the tube (where the FAW J6P Oil Filler Cap sits), while the ‘Rear support’ anchors the bottom. This “two-point” mounting logic holds the filler tube rigid and stable, so all the vibration is absorbed by the ‘Soft hose’ (Comp 17).

2. Component: ‘Oil dipstick tube main support’ (1009081-50A)
This (Comp 5) is the central “hub” of the support system. Its “logic” is to act as the primary mounting point for the ‘Oil dipstick tube assy’ (Comp 8). It is a heavy-duty bracket designed to bolt securely to the engine block, providing a stable anchor point that also supports the ‘Oil dipstick clip’ (Comp 7). This ensures the entire FAW J6P Oil Filler Cap and dipstick system is securely mounted.

Core 4: The “Fastener & Securing” Logic (All Others)

This final group’s “logic” is to provide a secure, vibration-proof, and complete installation for the FAW J6P Oil Filler Cap and dipstick systems.

1. The “Clamping” Logic (Bolts, Nuts, Washers)
The assembly uses multiple ‘Hexagon head bolts’ (Comp 3, 9, 11, 12, 14) with their associated ‘Washers’ and ‘Hexagon nuts’. The “logic” of using a full bolt/nut/washer system (vs. a simple flange bolt) is to provide a “through-bolt” clamp on the brackets, which is extremely resistant to vibration. This ensures all supports for the FAW J6P Oil Filler Cap system remain secure.

2. The “Securing” Logic (Clips & Straps)
This is the “Secondary NVH Logic” for the flexible components.

• ‘Oil filler tube clip’ (1009079-50A) & ‘Oil dipstick clip’ (1009094-50A): These clips (Comp 15 & 7) are the “Anti-Vibration Logic” for the tubes, preventing them from “whipping” and developing fatigue cracks.
• ‘Plastic strap assy’ (3724015-240): These three (3) “zip-ties” (Comp 13) are a deliberate “chafing-prevention” logic. They are used to secure the flexible ‘Soft hose’ (Comp 17) safely away from hot exhaust manifolds or sharp-edged brackets. This simple logic prevents a hole from being rubbed into the hose, which would cause a massive oil leak from the FAW J6P Oil Filler Cap‘s plumbing.

FAW J6P Oil Filler Cap & Dipstick Parts List

The following table provides the complete, detailed breakdown of all 18 component types in the FAW J6P Oil Filler Cap and Oil Dipstick assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Oil Filler Cap and Dipstick assembly are defined by its function as the primary service interface for the engine’s lubrication system.