Jack Cylinder for ZJ40 Truck-mounted Drilling Rig (Z07140000002AA)

Core Application & Target User Demand

The Jack Cylinder (Main Part No.: Z071400000002AA) and its accompanying components are exclusively designed for the ZJ40 Truck-mounted Drilling Rig—a critical piece of mobile oil and gas drilling equipment. As a key hydraulic lifting component, its core function is to stably support the entire drilling rig during setup, operation, and maintenance, ensuring the rig remains level, stable, and safe in mobile drilling scenarios. Targeting oilfield maintenance technicians, ZJ40 rig fleet managers, procurement specialists, and on-site drilling supervisors, these components solve core pain points including cylinder leakage, piston jamming, seal wear, and structural failure—all while complying with API 7K (Clause 7.3 for hydraulic cylinders), GB/T 15242.1-2017 (hydraulic cylinder standards), and original ZJ40 rig specifications. They guarantee reliable performance in mobile drilling environments, minimizing unplanned downtime and ensuring operational safety for on-site personnel and equipment.

Product Introduction

This product lineup consists of the Jack Cylinder (Z071400000002AA, P0000497AA) and all its critical sub-components for the ZJ40 Truck-mounted Drilling Rig, including end covers (P0000109AA), pistons (P0700016AA, P2300101AA), cylinder bodies (P1600016AA, P2300102AA), piston rods (P2300026AA, P1101266AA), small pistons (P0700017AA), liners, nuts, safety pins (P9860033AA), sealing rings (O-rings, Yx-type), retaining rings, fasteners (bolts, washers), base plates (Z07140000009AA, Z07140200001AA), and auxiliary parts. Each component is precision-manufactured to match the original ZJ40 truck-mounted drilling rig’s dimensional, hydraulic, and structural requirements, ensuring seamless compatibility and integration without modifications. Crafted from high-strength, wear-resistant materials with strict quality control (including pressure testing and seal performance verification), these components serve as direct replacements for worn or damaged parts, extending the service life of the jack cylinder and maintaining the ZJ40 rig’s stability and operational efficiency.

Function Description

The jack cylinder and its components work in perfect synergy to fulfill critical lifting and supporting functions for the ZJ40 Truck-mounted Drilling Rig: 1. Stable Lifting & Support: The cylinder (Z071400000002AA, P0000497AA) converts hydraulic pressure into linear force, lifting the rig off the truck chassis and supporting its full weight during drilling operations, ensuring the rig remains level and stable. 2. Sealing & Pressure Retention: Sealing rings (O-rings φ90X5.3, Yx-type D150, O-rings 140X5.3) prevent hydraulic fluid leakage, maintaining consistent internal pressure to avoid cylinder collapse or unexpected lowering. 3. Structural Integrity: Cylinder bodies, piston rods, and end covers provide robust structural support, withstanding the rig’s weight and external loads without deformation or failure. 4. Safety Protection: Safety pins (P9860033AA), circlips, and lock washers prevent accidental disassembly or component detachment, ensuring on-site safety; chains for safety pins add an extra layer of protection against pin loss. 5. Precision Control: Pistons and small pistons regulate hydraulic fluid flow and pressure distribution, enabling smooth, controlled lifting and lowering of the cylinder to adjust the rig’s level. 6. Mounting & Fixation: Base plates, bolts (M10X35), nuts, and retaining rings secure the cylinder to the rig chassis, ensuring stable installation even in mobile or uneven terrain.

Structural Features

The jack cylinder and its components feature a robust, mobile-friendly design optimized for the ZJ40 truck-mounted drilling rig’s unique operational needs, with key structural characteristics including: 1. High-Strength Core Components: Cylinder bodies (P1600016AA, P2300102AA) and piston rods (P2300026AA, P1101266AA) are made of heat-treated 45# carbon steel or 40Cr alloy steel, ensuring exceptional tensile strength, wear resistance, and load-bearing capacity—critical for supporting the rig’s weight. 2. Reliable Sealing System: A multi-layer sealing design (O-rings, Yx-type sealing rings) uses high-quality nitrile rubber (NBR) and fluororubber materials, resisting hydraulic fluid erosion, high temperatures, and wear to prevent leakage in high-pressure environments. 3. Safety-Centric Design: Safety pins with circlips and lock washers ensure secure component fixation; the cylinder’s structural design includes overload protection to avoid damage from excessive pressure or weight. 4. Mobile Adaptability: Compact, rugged construction minimizes space occupation, fitting seamlessly with the ZJ40’s truck-mounted design; base plates provide stable contact with uneven terrain, enhancing stability during mobile drilling setup. 5. Maintenance-Friendly Construction: Components are modular and easy to disassemble—seals, retaining rings, and fasteners can be quickly replaced without removing the entire cylinder, reducing maintenance time and labor costs. 6. Corrosion Resistance: Piston rods and external components feature chrome plating or anti-corrosion coatings, protecting against environmental contaminants (dust, mud, moisture) encountered in mobile drilling scenarios.

Applicable Working Conditions

The jack cylinder and its components are specifically engineered to withstand the demanding, mobile working conditions of the ZJ40 Truck-mounted Drilling Rig, including: 1. Mobile Drilling Environments: Compatible with the rig’s truck-mounted design, operating reliably during transportation and setup on uneven onshore terrain (e.g., oilfields, construction sites). 2. Wide Temperature Ranges: Operates stably from -20℃ (cold onshore climates) to 70℃ (hot, high-humidity environments), resisting thermal expansion and material degradation that could affect performance. 3. High-Pressure Hydraulic Systems: Handles hydraulic pressures up to 25MPa (rated pressure for ZJ40 jack cylinders), ensuring stable lifting and support without leakage or failure. 4. Contaminated Environments: Resists dust, drilling mud, and moisture, with sealed components and anti-corrosion coatings protecting internal parts from abrasive wear and rust. 5. Heavy-Load Operations: Capable of supporting the ZJ40 rig’s full weight (up to design limits) for prolonged periods during drilling, maintenance, and setup, without structural deformation. 6. Frequent Operation Cycles: Designed for repeated lifting and lowering cycles (daily setup and teardown for mobile drilling), with high fatigue resistance to avoid premature component wear.

Maintenance & Care Recommendations

To extend the service life of the jack cylinder and its components, ensure the ZJ40 Truck-mounted Drilling Rig’s stability, and comply with API 7K and GB maintenance guidelines, follow these practical, on-site-friendly recommendations: 1. Regular Inspection: Conduct daily visual checks for hydraulic fluid leakage (around seals, end covers, and screw plugs), piston rod wear (scratches, rust), and loose fasteners; inspect safety pins, circlips, and chains weekly to ensure they are secure and undamaged. 2. Seal Maintenance: Replace sealing rings (O-rings, Yx-type) every 6 months or immediately if leakage is detected; clean the seal grooves thoroughly before installing new seals to remove debris that could cause wear. 3. Hydraulic Fluid Care: Use anti-wear hydraulic oil (ISO VG 46) compatible with the ZJ40’s hydraulic system; replace the oil every 400 working hours and filter it regularly to remove impurities that could damage pistons and cylinder walls. 4. Piston Rod Maintenance: Clean the piston rod surface with a soft cloth after each use to remove mud and dust; apply anti-rust grease if the rig will be idle for more than 2 weeks to prevent corrosion. 5. Fastener Check: Tighten bolts (M10X35) and nuts (M10, M12, M64) to specified torque monthly, as vibration during transportation can loosen them; replace worn lock washers and spring washers to ensure secure fixation. 6. Cylinder Operation: Avoid overloading the cylinder (never exceed the rated load); operate the cylinder smoothly—abrupt lifting or lowering can cause hydraulic shock and damage components. 7. Storage & Handling: When the rig is not in use, lower the cylinder fully and secure it with safety pins; store replacement components in a dry, clean environment to prevent rust and contamination.

On-Site Fault Repair Cases

Case 1: Hydraulic Leakage from Jack Cylinder (Z071400000002AA)

Fault: A ZJ40 truck-mounted drilling rig experienced severe hydraulic leakage from the jack cylinder during setup, causing the cylinder to lower slowly and fail to support the rig stably. Root Cause: Worn Yx-type sealing ring (D150, 5300100303) and O-ring (φ140X5.3, P1000204AA) due to debris buildup in the seal groove—violating GB/T 15242.1-2017 seal maintenance requirements. Solution: Disassembled the cylinder end cover, replaced the worn seals, cleaned the seal groove and piston surface, and refilled with clean hydraulic oil. Outcome: Leakage stopped completely, the cylinder maintained stable pressure, and the rig could be safely set up for drilling operations.

Case 2: Piston Jamming in Jack Cylinder (P0000497AA)

Fault: The jack cylinder (P0000497AA) failed to lift or lower smoothly, with the piston jamming halfway during operation. Root Cause: Contaminated hydraulic fluid caused abrasive wear on the piston (P2300101AA) and cylinder body (P2300102AA), and the copper sleeve (P1200678AA) was worn—violating API 7K Clause 7.3.2 for hydraulic system cleanliness. Solution: Drained and replaced the contaminated hydraulic oil, cleaned the cylinder body and piston, replaced the worn piston and copper sleeve, and installed a new filter element. Outcome: Piston jamming resolved, the cylinder operated smoothly, and component wear was prevented.

Case 3: Safety Pin Failure and Component Loosening

Fault: During rig operation, the safety pin (P9860033AA) for the jack cylinder fell out, causing the cylinder’s liner to loosen and pose a safety hazard. Root Cause: Missing circlip (5300100236) for the safety pin and worn lock washer, allowing vibration during rig operation to dislodge the pin—violating safety design standards for mobile drilling equipment. Solution: Installed a new circlip and lock washer, replaced the safety pin, and tightened all related fasteners to specified torque. Outcome: Safety pin secured, component loosening eliminated, and on-site safety restored.

Case 4: Piston Rod Damage and Pressure Loss

Fault: The jack cylinder (Z071400000002AA) lost pressure quickly after lifting the rig, with visible scratches on the piston rod (P2300026AA). Root Cause: Scratches on the piston rod damaged the O-ring (φ90X5.3, 5300100236), causing hydraulic leakage; the piston rod was scratched by debris during rig transportation. Solution: Polished the piston rod surface to remove scratches, replaced the damaged O-ring, and installed a protective sleeve to prevent future debris damage. Outcome: Pressure loss resolved, piston rod protected, and the cylinder operated reliably.

FAQ

Procurement Guide

All components listed are exclusively engineered for the ZJ40 Truck-mounted Drilling Rig’s jack cylinder (Z071400000002AA, P0000497AA), ensuring perfect compatibility with the original equipment and seamless integration without modifications. Each component complies with API 7K, GB/T 15242.1-2017, and original ZJ40 rig specifications, undergoing strict quality control—from material selection and precision machining to pressure testing, seal performance verification, and non-destructive testing for critical parts (cylinder bodies, piston rods). Whether you need to replace a single seal, safety pin, piston, or the entire jack cylinder, selecting components by matching the original part numbers ensures optimal performance, reduces maintenance costs, and minimizes unplanned downtime for your ZJ40 mobile drilling operations. Our products are designed to solve the core pain points of mobile drilling—leakage, jamming, safety hazards, and component failure—providing long-term value and operational stability. Contact us today to place your order; our professional technical team is available to provide comprehensive support, including on-site fault diagnosis, maintenance guidance, and product selection advice, to help you keep your ZJ40 Truck-mounted Drilling Rig operating safely and efficiently in even the harshest mobile drilling environments. Trust our high-quality, compatible components to maintain the stability and reliability of your critical drilling equipment.

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