Cylinder Block for HOWO 7 6X4 Dump Truck

Steering pump seal

The Steering pump seal is a precision lip seal that prevents hydraulic fluid leakage from the steering pump shaft. It is made from oil-resistant nitrile rubber and features a garter spring to maintain constant lip pressure against the rotating shaft, ensuring reliable sealing even under high-pressure steering assist conditions.

Camshaft gear cover

The Camshaft gear cover is a die-cast aluminum housing that encloses the camshaft timing gears, protecting them from debris and retaining lubricating oil. It incorporates a gasket surface and mounting bosses for secure attachment to the cylinder block, ensuring precise gear alignment and quiet operation.

Front oil seal

The Front oil seal is a critical component that seals the crankshaft front end, preventing engine oil from leaking out of the timing cover. It is constructed from fluorocarbon rubber with a metal casing and a dual-lip design that provides superior sealing against both oil and dirt ingress, even at high rotational speeds.

Front oil seal seat

The Front oil seal seat is a machined housing that holds the front oil seal in its correct position relative to the crankshaft. It is precision-bored to ensure concentricity and features an O-ring groove for additional sealing between the seat and the cylinder block, preventing oil bypass.

Composite sealing washer

The Composite sealing washer is a multi-layer sealing element combining a metal core with a rubber outer coating. It provides a reliable seal for threaded connections and bolt heads, preventing oil and coolant leaks while maintaining consistent clamp load under thermal cycling and vibration.

Front oil seal seat gasket

The Front oil seal seat gasket is a precision-cut paper or rubber-coated gasket that seals the interface between the oil seal seat and the cylinder block. It compensates for surface irregularities and ensures a leak-proof joint, preventing oil from seeping out along the mounting flange.

Light-duty hexagon-head cylindrical screw plug

This screw plug is a small, hexagon-headed cylindrical plug used to seal threaded holes in the cylinder block, such as oil gallery access points. It is made from zinc-plated steel and features a tapered thread for a tight, leak-proof seal, and it can be easily installed or removed with a standard wrench.

Hexagon bolt with flange

The Hexagon bolt with flange is a high-strength fastener featuring an integrated wide flange that acts as a washer, distributing clamping pressure over a larger area. It is used extensively in the cylinder block assembly to secure covers, brackets, and accessories, providing a reliable and vibration-resistant joint.

Timing gear chamber of double-cylinder air compressor

This component is the housing that encloses the timing gears for the double-cylinder air compressor mounted on the engine. It is cast from aluminum alloy and provides precise gear alignment, oil passages for lubrication, and mounting points for the compressor itself, ensuring reliable air supply for the braking system.

Type 2 all-metal hexagonal lock nut

This lock nut is a prevailing-torque type nut made entirely of metal, with a distorted thread at the top that creates a locking action when tightened. It is used on critical fasteners in the cylinder block to prevent loosening due to vibration, providing a secure and reusable fastening solution.

Elastic cylindrical pin

The Elastic cylindrical pin is a spring-type dowel pin used for precise alignment and positioning of components on the cylinder block. It is made of spring steel with a split along its length, allowing it to compress and exert radial force against the hole walls for a secure, vibration-resistant fit.

Sealing ring

The Sealing ring is an O-ring or shaped elastomeric seal used to prevent fluid leakage at static and dynamic interfaces within the cylinder block. It is made from nitrile or fluorocarbon rubber, selected for compatibility with engine oil and coolant, and provides reliable sealing under wide temperature and pressure ranges.

Oil cooler cover

The Oil cooler cover is a cast aluminum housing that encloses the engine oil cooler core, directing oil and coolant flow through the cooler. It features integral gasket surfaces and mounting flanges, and it seals the oil cooler to the cylinder block, ensuring efficient heat exchange for maintaining optimal oil temperature.

Hexagon flange bolt

The Hexagon flange bolt is similar to the hexagon bolt with flange but may have specific length or thread variations. It is used for various attachments on the cylinder block, providing a wide bearing surface that reduces the risk of crushing soft materials and ensures consistent torque retention.

Oil return pipe component

The Oil return pipe component is a pre-formed steel tube assembly that directs oil from the cylinder head or turbocharger back to the oil pan. It includes integrated fittings and mounting brackets, ensuring a leak-free path for oil return and maintaining proper oil circulation within the engine.

Rubber hose

The Rubber hose is a flexible reinforced hose used to connect various fluid lines on the cylinder block, such as coolant or oil hoses. It is made from synthetic rubber with a textile or wire braid reinforcement, providing resistance to heat, oil, and pressure while allowing for thermal expansion and vibration absorption.

Fixing plate

The Fixing plate is a stamped steel bracket used to secure hoses, wires, or small components to the cylinder block. It features slotted holes or tabs for easy installation and provides a stable mounting point, preventing chafing and ensuring that lines remain properly routed.

Upper oil level gauge pipe component assembly

This assembly includes the upper section of the oil dipstick tube, which guides the dipstick into the oil pan. It is made from steel tubing with a flanged end and includes a sealing cap, ensuring accurate oil level readings and preventing oil mist from escaping through the dipstick opening.

Lower oil level gauge pipe component

The Lower oil level gauge pipe component is the lower segment of the dipstick tube, which extends into the oil pan. It is precisely positioned to ensure that the dipstick reaches the correct depth, providing reliable oil level readings. It is typically made of steel with a welded or brazed mounting flange.

Access plate

The Access plate is a removable cover on the cylinder block that provides access to internal components such as the timing chain or balance shaft. It is sealed with a gasket and secured with bolts, allowing for easy inspection and maintenance without disassembling the entire engine.

Hexagon head bolt

The Hexagon head bolt is a standard metric bolt with a hexagonal head, used for general fastening applications on the cylinder block. It is available in various grades and is often used in non-critical locations where a flange or washer is not required.

Anti-scald safety sign

This safety sign is a durable adhesive label or plate that warns operators of hot surfaces on the cylinder block. It features universally recognized symbols and text to prevent burn injuries, and it is resistant to heat, oil, and weathering for long-lasting visibility.

Rear screw plug of main oil duct

This screw plug seals the rear end of the main oil gallery in the cylinder block. It is a tapered pipe plug made of steel, with a hexagonal socket for installation. It provides a leak-proof closure that can be removed for cleaning or inspection of the oil passage.

Anti-entanglement safety sign

This safety sign warns against entanglement hazards near rotating parts of the cylinder block, such as the fan or pulleys. It is made of reflective or high-contrast material to ensure visibility, helping to prevent serious injuries during maintenance or operation.

Cylinder liner

The Cylinder liner is a replaceable cast iron sleeve that fits inside the cylinder bore, providing a hard, wear-resistant surface for the piston rings to run against. It is precision-honed to a mirror finish and features a flange at the top for accurate positioning, ensuring long engine life and consistent compression.

O-shaped rubber sealing ring

The O-shaped rubber sealing ring is a circular elastomeric seal with a round cross-section, used to seal static or dynamic interfaces on the cylinder block. It is made from oil-resistant rubber and provides reliable sealing against fluids and gases, with the ability to accommodate slight misalignments.

Oil cooler cover gasket

This gasket seals the oil cooler cover to the cylinder block, preventing oil and coolant leakage at the interface. It is made from a composite material with a metal carrier and a rubber sealing bead, ensuring a durable and reliable seal even under thermal cycling.

Oil-gas separator assembly

The Oil-gas separator assembly is a device that separates oil mist from the crankcase ventilation gases, returning oil to the sump and sending clean air to the intake. It consists of a housing, a coalescing filter element, and a drain valve, reducing oil consumption and emissions.

Hose clamp

The Hose clamp is a fastening device used to secure rubber hoses onto fittings on the cylinder block. It typically features a worm-gear drive or spring-loaded design, providing consistent clamping force that prevents leaks and hose detachment under pressure and vibration.

Rubber hose with fiber sandwich

This reinforced rubber hose incorporates a fiber sandwich layer between the inner and outer rubber layers, providing enhanced burst strength and resistance to collapse under vacuum. It is used for coolant and oil lines where higher pressure or flexing is expected.

Oil filler pipe assembly

The Oil filler pipe assembly is a metal tube that extends from the cylinder block to a convenient location for adding engine oil. It includes a filler cap with a sealing gasket and may have a baffle to prevent oil splashing, making oil filling clean and easy.

Blanking cap

The Blanking cap is a protective cover used to seal unused ports or openings on the cylinder block during storage or shipping. It is made of plastic or metal and prevents debris ingress, keeping the internal passages clean until they are connected to their intended hoses or fittings.

Short oil filler pipe gasket

This gasket seals the oil filler pipe to the cylinder block, preventing oil leaks at the connection. It is made of oil-resistant rubber or cork composite and is designed to withstand repeated thermal cycles and contact with hot engine oil.

Double-end stud-pre-coated locking

This stud bolt has threads on both ends and is pre-coated with a micro-encapsulated locking compound. It provides a consistent friction coefficient during installation and resists loosening due to vibration, making it ideal for critical bolted joints on the cylinder block.

Cushion block

The Cushion block is a rubber or urethane dampening element used to absorb shock and vibration between the cylinder block and mounted accessories. It reduces noise transmission and protects components from impact loads.

Main bearing bush pair

The Main bearing bush pair consists of two precision half-shell bearings that fit into the main bearing journals of the cylinder block and the bearing caps. They are made of steel-backed with a bearing alloy lining, providing a low-friction, wear-resistant surface for the crankshaft journals.

Thrust plate pair

The Thrust plate pair is a set of two semi-circular plates that control the axial movement of the crankshaft within the cylinder block. They are made of bearing-grade bronze or steel with a wear-resistant coating, ensuring precise crankshaft positioning and preventing excessive end play.

Nozzle assembly

The Nozzle assembly is a precision metering device that sprays oil onto the cylinder walls or piston pins for cooling and lubrication. It consists of a nozzle body, a check valve, and a metering orifice, delivering a controlled oil jet that improves engine performance and reduces piston temperatures.

Hollow bolt

The Hollow bolt is a fastening element with a longitudinal bore that allows fluid to pass through it. It is used to connect fluid lines to the cylinder block while simultaneously providing a clamping force, commonly found in oil feed lines to the turbocharger or other accessories.

Rear oil seal assembly (Labyrinth type)

The Rear oil seal assembly is a labyrinth-type seal that prevents oil leakage from the rear of the crankshaft. It consists of multiple concentric rings that create a tortuous path for oil, along with a drain channel that returns leaked oil to the sump, providing a durable, non-contact sealing solution.

Composite washer

The Composite washer is a sealing element that combines a metal core with a rubber sealing layer, used under bolt heads or nuts to prevent fluid leakage. It provides a reliable seal and consistent torque retention, even after repeated tightening cycles.

Air compressor gear cover

The Air compressor gear cover is a housing that encloses the drive gears for the air compressor, mounted on the cylinder block. It protects the gears from contamination and retains lubricating oil, ensuring reliable air compressor operation for the truck’s braking system.

OEM-grade precision and material quality. Every cylinder block casting is made from high-strength alloy iron with controlled metallurgy, ensuring superior rigidity and thermal conductivity. All sealing components and fasteners are sourced from certified suppliers to meet strict original equipment standards.

Comprehensive component integration. Our cylinder block includes all necessary seals, gaskets, bolts, and auxiliary parts in one assembly, eliminating the need for multiple sourcing. This ensures perfect compatibility and reduces assembly time, making maintenance and rebuilds more efficient.

Durable sealing and corrosion protection. All sealing rings, washers, and gaskets are made from oil-resistant, high-temperature materials, and all steel fasteners receive anti-corrosion coatings. This extends the service life of the cylinder block and minimizes oil leaks, even under extreme operating conditions.

Proven in heavy-duty applications. Our cylinder block assemblies have been tested in thousands of HOWO 7 6X4 trucks operating in mining, construction, and long-haul applications worldwide. They are trusted for their reliability, ease of maintenance, and ability to keep your fleet running with minimal downtime.