Front Mechanical Jack Assembly & Related Parts for ZJ40 Drilling Rig

1

Z02070000003AA

Front mechanical jack assembly

High-strength alloy steel (40CrNiMoA), quenched and tempered to enhance toughness and load-bearing capacity; surface treated with epoxy anti-rust coating for corrosion resistance

1. Fatigue deformation from long-term exposure to loads exceeding the rated capacity; 2. Corrosion caused by rain, mud, or chemical drilling fluids in outdoor drilling sites; 3. Internal mechanical wear due to insufficient lubrication of transmission components.

1. Strictly follow the rated load (not exceeding 120% of the rated value) during operation; 2. Clean the surface with neutral detergent after use and reapply anti-rust coating annually; 3. Inspect internal gears and lubrication status weekly, adding lithium-based grease as needed.

1

Z02070100002AA

Cylinder body

High-precision seamless steel pipe (20Mn2), heat-treated for hardness; inner surface honed for smoothness, outer surface galvanized for anti-rust protection

1. Inner surface wear and scratching caused by debris entering the cylinder; 2. Deformation due to uneven lateral force during jack operation; 3. Corrosion and rust from long-term outdoor exposure or chemical contact.

1. Clean the cylinder opening thoroughly before installing internal components to prevent debris entry; 2. Ensure the jack is placed on a flat surface to avoid uneven lateral force; 3. Cover the cylinder opening with a dust cap when not in use to prevent dust and moisture.

1

Z02070300001AA

Screw stem

Alloy steel (35CrMoA), carburized and quenched for surface hardness (HRC 58-62); thread precision-machined (Grade 7) for smooth transmission; surface anti-rust treated

1. Thread wear and deformation caused by overloading or uneven force during lifting; 2. Dry friction between threads due to insufficient lubrication; 3. Thread damage from debris or foreign objects getting stuck between threads.

1. Apply high-temperature resistant thread lubricant before use and reapply every 40 working hours; 2. Avoid sudden lifting or lowering, operating the jack at a uniform speed; 3. Clean threads with a soft brush regularly to remove debris, avoiding hard tools that scratch threads.

1

P9100060AA

Chain（d=φ5.6,20 knots）

High-strength carbon steel (20Mn2), surface quenched for wear resistance; galvanized anti-rust treatment to prevent corrosion; each link precision-forged for uniform strength

1. Wear between chain links due to lack of lubrication; 2. Stretching or fracture caused by loads exceeding the chain’s tensile strength; 3. Corrosion and rust from rain, mud, or saltwater (for offshore drilling sites).

1. Apply chain-specific lubricant every 30 working hours to reduce friction between links; 2. Never use the chain to lift loads exceeding its rated tensile capacity (≥750kg); 3. Rinse with fresh water and dry thoroughly after use in rainy or offshore environments, then apply anti-rust oil.

1

Z02080100002AA

Pad

High-density nitrile rubber (NBR) with a steel plate core; shore hardness 65-70° for excellent buffer performance; oil-resistant and weather-resistant

1. Abrasion caused by long-term contact with rough ground or sharp objects; 2. Aging and cracking due to exposure to high temperature, ultraviolet rays, or chemical drilling fluids; 3. Permanent deformation from excessive pressure.

1. Place a flat steel plate under the pad when using on soft or rough ground to reduce wear; 2. Store in a cool, dry place away from direct sunlight and chemicals when not in use; 3. Inspect for cracks or deformation before each use, replacing immediately if damaged.

1

P2000192AA

Pin

Alloy steel (35CrMoA), carburized and quenched for surface hardness; precision-machined for dimensional accuracy; surface black oxide treatment for anti-rust

1. Shear damage caused by uneven force or excessive torque during assembly; 2. Wear of the pin surface due to long-term vibration and rotation; 3. Corrosion from moisture or chemical contact in harsh drilling environments.

1. Use a torque wrench to tighten the pin according to the specified torque (28-32N·m) during assembly; 2. Check the pin’s surface for wear or scratches monthly, replacing if wear depth exceeds 0.5mm; 3. Apply anti-rust grease before installation and after maintenance.

2

P9860033AA

Circlip, safety pin

Circlip: Spring steel (65Mn) for elasticity; Safety pin: Carbon steel (Q235) with zinc plating; both treated for anti-rust and fatigue resistance

1. Elastic fatigue of the circlip due to frequent disassembly and assembly; 2. Rust and corrosion of the safety pin caused by humid or chemical environments; 3. Deformation or breakage from improper use (bending with brute force).

1. Replace the circlip every 10 disassembly cycles to avoid elastic failure; 2. Inspect the safety pin for rust regularly, replacing if rust is severe; 3. Use proper tools to insert/remove, avoiding brute force that bends or breaks parts.

3

Z02070200001AA

Nut

Carbon steel (Q355B), heat-treated for hardness; surface zinc-plated for anti-rust; internal thread precision-machined to match the jack’s screw stem

1. Thread stripping due to over-tightening or mismatch with connecting parts; 2. Rust and seizing caused by moisture, leading to difficulty in disassembly; 3. Deformation of the nut body due to uneven torque during tightening.

1. Use only with matching components (e.g., the jack’s screw stem) to avoid thread mismatch; 2. Tighten with a torque wrench to the specified torque (35-40N·m); 3. Apply anti-seize compound to threads before installation to prevent rust and seizing.

4

P2000107AA

Pin

Alloy steel (35CrMoA), carburized and quenched for surface hardness; precision-machined for dimensional accuracy; surface black oxide treatment for anti-rust

1. Fatigue fracture caused by frequent vibration during rig operation; 2. Damage from improper disassembly (pulling with brute force); 3. Pitting corrosion on the surface due to contact with acidic drilling fluids.

1. Install a shock-absorbing gasket near the pin to reduce vibration impact; 2. Use a pin puller for disassembly, avoiding brute force; 3. Clean with alkaline detergent after contact with acidic fluids, then dry and apply anti-rust oil.

1

4101800008

Grease nipple M10X1

Carbon steel (Q235), surface zinc-plated for anti-rust; internal thread precision-machined (M10X1) to match standard grease guns; ball check valve for leak-proof performance

1. Clogging caused by dust, mud, or old grease buildup; 2. Thread damage during grease gun connection; 3. Rust and corrosion leading to grease leakage or valve failure.

1. Clean the nipple’s top with a clean cloth before connecting the grease gun to prevent debris entry; 2. Connect the grease gun gently to avoid thread damage; 3. Inject grease until it overflows slightly, then wipe excess to prevent dust buildup.

1

Can the front mechanical jack assembly (Z02070000003AA) be used interchangeably with the ZJ40’s rear jack assembly?

No. The front and rear jack assemblies for ZJ40 rigs have different load-bearing capacities, dimensions, and connection interfaces—designed specifically for their respective positions. Interchanging them will cause unstable operation, component damage, and potential safety hazards.

2

What is the difference between the two pin models (P2000192AA and P2000107AA), and can they be mixed?

While both pins are made of the same material, they differ in length and diameter—P2000192AA is used for connecting the cylinder body and screw stem, while P2000107AA connects the chain and jack frame. Mixing them will cause loose connections and component detachment, so they must be used in their designated positions.

3

How often should I inspect and maintain the front mechanical jack’s components to avoid failure?

For daily use, inspect the pad, pins, and grease nipple before each operation. Conduct weekly maintenance: check lubrication status, clean threads and components, and inspect for wear/corrosion. Conduct monthly in-depth inspections: disassemble key parts (e.g., screw stem, chain) to check for internal wear, and replace worn components promptly.