FAW J6P Oil Pump: 11 Critical Parts for Flawless Engine Lubrication

Welcome to this expert deconstruction of the FAW J6P Oil Pump (Main Assy P/N 1011010-36D). This component is the absolute “heart” of the engine for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

While small, this “Logic Assembly” of 11 core component types is the single most critical component for engine survival.

The “logic” of the FAW J6P Oil Pump is to “collect” oil from the ‘Oil Sump’ and “pressurize” it, forcing it at 40-60 PSI through the engine’s tiny internal galleries. This high-pressure oil is the only thing separating all moving metal parts, like the crankshaft and bearings.

The “Positive Displacement Logic” is the key to the FAW J6P Oil Pump. It is a “Gerotor” or “gear-within-a-gear” pump (Comp 5). This design is critical because its output is directly proportional to engine RPM.

This “logic” means it creates high *volume* at low-RPM (like at idle, to protect the turbo) and high *pressure* at high-RPM. However, this also means it must have a “Safety Valve Logic” (Comp 3, 4) to bleed off *excess* pressure at high speeds, which would otherwise blow out engine seals.

A failure in the FAW J6P Oil Pump is not gradual; it is instant and catastrophic, leading to a complete engine seizure in minutes.

This technical guide is an essential resource for engine rebuilders, machine shop technicians, and fleet parts managers. We will deconstruct the entire 11-component-type group. We will analyze the “Positive Displacement Logic” (the pump gears and housing), the “Pressure Regulation Logic” (the safety valve), and the “Drive & Interface Logic” (the drive gears and fasteners) that define this FAW J6P Oil Pump.

Core 1: The “Positive Displacement” Logic (Component 5 & 7)

This group forms the core of the FAW J6P Oil Pump. It is the “Gerotor” assembly that physically moves the oil.

1. Component: ‘Oil pump assy’ (1011010-36D)
This (Comp 5) is the main “Pump Logic.” It is the complete assembly, containing the sub-parts that do the work. This assembly is the core of the auto_33 FAW J6P Oil Pump.

2. The “Gerotor” Logic (Sub-Components):
Inside the main assembly, we find the key parts:

• ‘Oil pump drive gear shaft assy’ (1011020-36D) & ‘Drive gears’ (1011022-36D): This is the “inner” gear (Comp 5). It is driven by the ‘Driven gear – oil pump’ (Comp 7). The list calls for two (2) ‘Drive gears’, which form the “Gerotor” set.
• ‘Oil pump driven gear assy’ (1011030-36D): This is the “outer” gear (Comp 5) that spins *around* the inner gear.
• ‘Oil pump cover plate’ (1011017-29D): This (Comp 5) is the “Sealing Logic” that bolts to the pump body (Comp 10), enclosing the gears and creating the high-pressure chamber.

The “Pumping Logic” is simple: as these two gears spin, the “crescent-shaped” gap between their lobes *increases* in size on the “suction” side, pulling oil in from the FAW J6P Oil Sump. As they continue to rotate, the gap *decreases*, squeezing the oil and forcing it out under high pressure. This is the positive displacement action of the FAW J6P Oil Pump.

Core 2: The “Drive Interface” Logic (Components 7, 8, 10)

This group’s “logic” is to transfer power from the crankshaft to the FAW J6P Oil Pump‘s internal Gerotor set.

1. Component: ‘Driven gear – oil pump’ (1011014-36D)
This (Comp 7) is the “Input Drive Logic.” This is the large gear that is visible on the *outside* of the FAW J6P Oil Pump housing. Its “logic” is to mesh directly with the ‘Oil pump drive gear’ (P/N 1005039-36D) that is located on the crankshaft. This “gear-on-gear” drive is a “no-slip,” non-stretch, life-of-the-engine solution, far more durable than a chain.

2. Component: ‘Bushing – oil pump’ (1011013-29D)
This (Comp 10) is the “Sacrificial Bearing Logic.” The oil pump gears spin at high speed on steel shafts. This “bushing” is a soft, bronze-alloy sleeve that is pressed into the pump housing (part of Comp 5). The ‘Driven gear shaft’ (1011031-29D) spins inside this bush. Its “logic” is to be the “wear item.” It saves the expensive aluminum pump housing and steel shaft from damage. This is a key serviceable part of the FAW J6P Oil Pump.

3. Component: ‘Gasket – oil pump drive shaft’ (1011045-29D)
This (Comp 8) is the “Thrust Logic.” It is a shim or gasket that sets the “end-play”—the front-to-back movement—of the ‘Drive gear shaft’ (1011021A29D). This precise spacing is critical to prevent the gears from “binding” or “walking” inside the housing of the FAW J6P Oil Pump.

Core 3: The “Pressure Regulation” Logic (Components 1, 2, 3, 4)

This group is the “Safety Valve Logic.” A positive displacement FAW J6P Oil Pump would create infinite pressure (1000+ PSI) at high RPM, which would blow out every seal in the engine. This system prevents that.

1. Components: ‘Spring-oil pump safety valve’ (1011033-29D) & ‘Valve core…’ (1011032-29D)
This is the “Relief Valve Logic.” The ‘Valve core’ (Comp 4) is a small piston that blocks a “bypass” channel in the FAW J6P Oil Pump housing. The ‘Spring’ (Comp 3) is calibrated to hold this valve shut at normal pressures.

The “Spring Logic” is this: when oil pressure exceeds the spring’s rating (e.g., 60-70 PSI), the pressure forces the ‘Valve core’ (Comp 4) *back*, compressing the ‘Spring’ (Comp 3). This “logic” opens the bypass channel, allowing excess oil to bleed off, usually back to the “suction” side of the pump. This is how the Warning FAW J6P Oil Pump maintains a safe, stable pressure at all engine speeds.

2. Components: ‘Hexagon head plug’ (Q617B22) & ‘Copper gasket’ (Q/WC3403-1994)
This (Comp 1 & 2) is the “Sealing Cap Logic.” This ‘plug’ and ‘gasket’ simply seal the “bore” that the safety valve and spring sit in. The ‘Copper gasket’ (Comp 2) is a “crush washer” that creates a perfect, high-pressure, single-use seal.

Core 4: The “Fastener & Alignment” Logic (Components 6, 9, 11)

This final group’s “logic” is to ensure the FAW J6P Oil Pump is mounted to the engine block with perfect alignment and vibration-proof clamping.

1. Component: ‘Dowel pin’ (Q5220814)
This (Comp 9) is the “Alignment Logic.” Bolts are *not* for alignment. This solid steel pin is pressed into the engine block, and the FAW J6P Oil Pump housing slides onto it *before* the bolts are inserted. This “logic” guarantees perfect alignment, which is essential to ensure the ‘Driven gear’ (Comp 7) meshes perfectly with the crankshaft’s drive gear.

2. Components: ‘Hexagon flange bolt’ (Q1840825) & ‘Hexagon flange nut’ (Q32010)
This is the “Clamping Force Logic.” The four (4) ‘Bolts’ (Comp 6) are the primary fasteners that hold the FAW J6P Oil Pump assembly to the engine block. The ‘Nut’ (Comp 11) likely secures the main drive gear shaft. The “Flange Logic” of these fasteners means they have a built-in washer, which distributes the clamping load and resists vibration, preventing the FAW J6P Oil Pump from shaking loose.

FAW J6P Oil Pump Parts List & Specifications

The following table provides the complete, detailed breakdown of all 11 component types identified in this FAW J6P Oil Pump assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Oil Pump are defined by its function as the high-pressure “heart” of the engine’s lubrication system.