FAW J6P Locating Pin Holder: Deconstructing 7 Critical Parts for Flawless Door Alignment

This technical analysis deconstructs the FAW J6P Locating Pin Holder system on the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This component, also known as a ‘locating pin seat’, is a small but critical part of the cab. It is the primary alignment and load-bearing point for the heavy-duty door, ensuring flawless closure every time.

The FAW J6P Locating Pin Holder (or pin seat) is the core of a 7-part assembly that also includes the door’s latching striker and multiple weatherstip seals. The function of this entire system is interdependent; without the perfect alignment provided by the FAW J6P Locating Pin Holder, the latch will misalign, and the seals will fail to create a weather-tight environment. This guide analyzes all 7 parts.

Core 1: The “Alignment & Support” Logic (The FAW J6P Locating Pin Holder)

This group represents the core of this assembly: the FAW J6P Locating Pin Holder itself and its dedicated mounting hardware. This system provides the precision alignment and vertical support for the door *before* it latches.

1. Component: ‘Left front door locating pin seat’ (6101547-A01) – Qty 1
2. Component: ‘Right front door locating pin seat’ (6101548-A01) – Qty 1

These two parts are the left and right versions of the FAW J6P Locating Pin Holder. They are the female receptacles, mounted securely on the truck’s B-pillar. The door itself contains a corresponding male locating pin (not listed in this diagram) which slides into this holder.

The Pin Seat Logic is its primary function. The holder has a wide, tapered opening. This design acts as a funnel, capturing the door’s pin and guiding it into a precise, centered position, even if the door is closed from a slight angle. This provides sub-millimeter alignment accuracy *before* the door latch engages the striker.

The Sag Prevention Logic is the most critical function of the FAW J6P Locating Pin Holder. The heavy-duty door of a CA3250P66K2L1T1E truck is extremely heavy. Over time, this weight causes “door sag” as the hinges wear. The FAW J6P Locating Pin Holder system is designed to bear this vertical load. As the door closes, the male pin rests on the bottom of this holder, taking the entire vertical weight of the door off the hinges and the latching mechanism. This prevents sag and ensures the door’s seals and latch remain perfectly aligned for the life of the vehicle.

3. Component: ‘Hex flange bolt’ (Q1840612F6) – Qty 4

This is the specified fastener for mounting the FAW J6P Locating Pin Holder to the B-pillar. This is not a standard bolt; it is a high-tensile flange bolt.

The Fastener Logic here is about load distribution. The bolt’s integrated flange acts as a built-in washer, spreading the clamping force over a wider area. This is essential for resisting the immense shear forces (the downward and outward pull of the door) that the FAW J6P Locating Pin Holder must endure. This bolt prevents the holder from loosening or shifting under constant vibration and impact.

Core 2: The “Latching & Security” Logic (The Striker System)

This group represents the secondary locking system. It works *in partnership* with the FAW J6P Locating Pin Holder. The pin holder provides the alignment; this striker provides the final, secure lock.

1. Component: ‘Striker assy’ (6105125-A01) – Qty 2

This is the case-hardened steel loop, or “striker,” that the door’s rotating latch mechanism (in the door) grabs onto.

The Latching Logic is dependent on Core 1. The striker’s only job is to be “caught” by the latch. If the FAW J6P Locating Pin Holder fails and the door sags, the latch will hit the striker at the wrong height. This causes hard-to-close doors, impact damage, and eventual failure of the latch. The pin holder ensures the latch hits the striker dead-center every time.

2. Component: ‘Cross recessed countersunk head screw’ (Q2540825) – Qty 4
3. Component: ‘Tapered spring lock washer’ (Q41408) – Qty 4

These are the fasteners for the striker assembly. Their logic is different from the pin holder’s bolts.

The Countersunk Logic of the Q2540825 screw is critical. The head of this screw must sit perfectly flush with the striker’s mounting plate. Any protruding head would interfere with the door’s latch mechanism, preventing it from closing or causing it to jam.

The ‘Tapered spring lock washer’ (Q41408) provides constant tension to prevent the striker bolts from backing out under the severe vibration of a dump truck.

Core 3: The “Alignment-Dependent Sealing” Logic (The Weatherstrips)

This final group of components, the weatherstrips, are entirely dependent on the perfect alignment provided by the FAW J6P Locating Pin Holder. If the alignment fails, these seals are rendered useless.

1. Component: ‘Left front door outer weatherstrip assy’ (6107015-A01) – Qty 1
2. Component: ‘Right front door outer weatherstrip assy’ (6107020-A01) – Qty 1

This is the “beltline” or “waist” seal that mounts to the exterior of the door at the base of the window. Its job is to wipe the glass.

The Wiping Logic of this seal relies on the FAW J6P Locating Pin Holder to set the correct vertical height of the door. If the door sags, this seal will either create too much pressure on the glass (making it hard to roll down) or create a gap that lets water pour into the door shell.

3. Component: ‘Front door upper seal’ (6107031-A01-C00) – Qty 2

This is the primary seal mounted on the cab body, which seals against the top and sides of the door.

The Compression Logic of this seal is its function. It needs to be compressed evenly by the door. If the FAW J6P Locating Pin Holder fails and the door sags, a gap will open up at the top of the door frame. This gap will create a massive wind noise (whistling) and allow water to directly enter the cab. Therefore, the FAW J6P Locating Pin Holder is directly responsible for making this seal effective.

FAW J6P Locating Pin Holder: Complete 7-Part Breakdown

The following table provides the complete, detailed breakdown of all 7 component types in the FAW J6P Locating Pin Holder and alignment assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Locating Pin Holder are defined by its primary role as the door’s main alignment and load-bearing component.