9822199548 (=1616725781+1616761280): SHORT BLOCK

The Atlas Coco 9822199548 (=1616725781+1616761280)  SHORT BLOCK L8(30)MKI  is a genuine and original core air end assembly designed specifically for Atlas Copco mobile air compressors, with primary applications in the ROC L8 series drill rigs and other L8-platform mobile compressor systems. We source this unit directly from Atlas Copco (Shanghai) Trading Co., Ltd. , ensuring every assembly arrives as a brand-new, original factory component with full traceability.

Product Introduction

A short block represents the structural heart of any compressor or engine system. This unit combines the cylinder block, crankshaft, connecting rods, pistons, and cylinder liners into a single, pre-assembled core. Unlike a long block, which includes cylinder heads and valve train components, the short block focuses on the lower-end rotating assembly—the foundation upon which you rebuild a fully operational compressor power section.

Atlas Copco manufacture this short block to match your original equipment specifications exactly, following the serial number configuration of your existing system. This approach eliminates guesswork and delivers a drop-in replacement that restores your Atlas Copco mobile compressor to factory performance standards.

Product Specifications

Parameter	Specification
Part Name	SHORT BLOCK L8(30)MKI
Part Number	9822199548
Composition	9822199548 = 1616725781 + 1616761280
Weight	685.93 kg
Dimensions	50 cm × 50 cm × 50 cm
Origin	CN
HS Code	84148075
Price	$20,000 (excl. VAT)
Compatibility	Atlas Copco mobile air compressors, ROC L8 series drill rigs (D65 LF, D65-10LF, and related models)

The compact 50cm × 50cm × 50cm footprint facilitates straightforward handling and installation in field service environments. At 685.93 kg, this assembly delivers substantial durability while remaining manageable for professional installation teams equipped with appropriate lifting gear.

How the Short Block Works

The short block serves as the power generation core of your Atlas Copco mobile air compressor. Here is how it functions within the complete system:

1. Air Compression Cycle: The compressor draws atmospheric air through the intake system. Within the short block assembly, the pistons move linearly inside the cylinder liners, driven by the crankshaft’s rotational motion.

2. Reciprocating Motion: The crankshaft converts rotational energy from the prime mover (typically a diesel engine) into reciprocating motion via the connecting rods. This mechanical translation drives the pistons upward and downward within their cylinders.

3. Compression Stroke: As the piston rises, it compresses the air trapped above it. The cylinder liners provide the precision-machined surface necessary for effective sealing between the piston rings and the cylinder wall.

4. Discharge: At peak compression, the compressed air exits through the discharge valves and proceeds to the downstream cooling and storage systems.

5. Continuous Operation: The crankshaft’s counterweights balance the rotating assembly, minimizing vibration while the main bearings support the crankshaft’s continuous rotation under full load conditions.

The short block’s pre-assembled nature means all critical clearances—piston-to-cylinder, bearing clearances, and ring gaps—come factory-set. You simply install the cylinder head, external components, and ancillary systems onto this foundation to complete the rebuild.

When to Replace the Short Block

Recognizing the signs of short block degradation helps you avoid catastrophic failure and unplanned downtime. Replace your short block when you observe any of the following conditions:

• Loss of Compression: The compressor struggles to maintain rated output pressure. This typically indicates worn piston rings, scored cylinder liners, or valve seating issues within the core assembly.
• Excessive Oil Consumption: The system consumes lubricating oil at an accelerated rate. Worn piston rings or cylinder liner scoring allow oil to bypass the rings and enter the compression chamber.
• Knocking or Unusual Noises: Metallic knocking sounds from the compressor section often signal worn main bearings, connecting rod bearings, or a failing crankshaft.
• Metal Contamination: Oil analysis reveals elevated levels of wear metals (iron, copper, lead, or tin) in the lubricant. This indicates progressive internal wear within the short block assembly.
• High Operating Hours: While Atlas Copco mobile compressors are built to last, even the most durable systems require core replacement after extended service. Monitor your compressor’s operating hours and consult your maintenance schedule for recommended overhaul intervals.
• Overheating: The system runs hotter than normal operating temperatures, suggesting increased internal friction from worn components.

Proactive replacement before complete failure saves you from secondary damage to the cylinder head, turbocharger, and other downstream components. It also minimizes costly downtime on critical job sites.

Installation Steps

Proper installation ensures your new short block delivers full service life and performance. Follow these steps:

Step 1 – Preparation

• Secure the compressor in a stable, level position with adequate workspace around it.
• Drain all lubricants and coolants from the system.
• Disconnect battery power and tag out the system to prevent accidental startup.

Step 2 – Remove External Components

• Remove the cylinder head assembly and set it aside for inspection.
• Remove the oil pan, oil pump, and any ancillary brackets or lines attached to the existing block.
• Label all removed components and hardware for organized reassembly.

Step 3 – Extract the Old Short Block

• Attach appropriate lifting equipment (hoist or overhead crane) rated for the 685.93 kg assembly weight.
• Remove the engine or compressor mounting bolts securing the block to the frame.
• Carefully lift the old short block from the chassis. Maintain level alignment during extraction to avoid binding.

Step 4 – Prepare the New Short Block

• Unpack the new short block and inspect for any shipping damage.
• Verify that all rotating components move freely by rotating the crankshaft manually.
• Clean all mating surfaces on the chassis and frame where the new block will seat.

Step 5 – Install the New Short Block

• Position the new short block onto the mounting points using the lifting equipment.
• Align the mounting bolt holes and install all fasteners to factory torque specifications.
• Torque fasteners in the correct sequence to ensure even clamping and prevent distortion.

Step 6 – Reinstall External Components

• Install the oil pump, oil pan, and all previously removed lines and brackets.
• Reinstall the cylinder head with a new head gasket. Torque head bolts to factory specifications using the correct sequence.
• Reconnect all coolant and lubricant lines.

Step 7 – Final Assembly and Testing

• Fill the system with the correct grade and quantity of lubricating oil.
• Refill coolant if applicable to the system configuration.
• Reconnect battery power and perform a dry crank to establish oil pressure before starting.
• Start the compressor and monitor for unusual noises, leaks, or vibrations.
• Verify that the system achieves and maintains rated output pressure.
• Check all fluid levels after initial run-in and top off as necessary.

Important: Always refer to your specific Atlas Copco service manual for model-specific torque values, fluid specifications, and procedural variations. We recommend professional installation by qualified Atlas Copco service technicians.

Why Choose This Genuine Short Block

Unexpected air-end failure can halt drilling rigs, mining operations, or municipal production lines, costing thousands of dollars in lost hourly productivity. Maintaining a critical standby block or planning your scheduled overhauls around verified components protects your bottom line.

• Factory-Grade Quality: This assembly comes directly from Atlas Copco (Shanghai) Trading Co., Ltd., ensuring 100% original specifications and materials. You receive the same quality that Atlas Copco builds into every new compressor.
• Cost-Effective Rebuild: Rather than replacing the entire compressor, you rebuild the core section while reusing your existing external components—cylinder head, turbocharger, fuel system, and ancillaries. This significantly reduces total overhaul costs.
• Reduced Downtime: The pre-assembled short block eliminates the time-consuming process of measuring, selecting, and fitting individual bearings, pistons, and rings. Your installation team simply performs the swap and reassembles the external components.
• Exact Specification Match: We manufacture this short block to match your original engine or compressor serial number configuration. Every dimension, clearance, and component specification mirrors the factory original.
• Proven Reliability: Atlas Copco’s mobile compressors have earned their reputation through decades of service in the world’s harshest environments—construction sites, mining operations, and oil and gas fields. This short block carries that same engineering heritage.

Order Now!

Looking for original and genuine Atlas Copco 9822199548 (=1616725781+1616761280) SHORT BLOCK L8(30)MKI?  Reach out to our engineering service desk today to receive an official, line-item commercial quote, verify current real-time shipping schedules to your destination, or request comprehensive dimensional drawings for your specific equipment model.

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