SJ Petro ZJ40 Dolly (Z05010800001AA)-2

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P9920168AA

Channel steel L=1064

High-strength structural steel (Q355B); hot-rolled forming; surface shot blasting + anti-corrosion paint coating; length 1064mm; designed to form the dolly’s main frame, bearing vertical and horizontal loads.

1. Local wear and deformation from long-term heavy load and drill site vibration; 2. Corrosion from drilling fluid splashes and outdoor moisture; 3. Weld seam cracking (if connected by welding) due to uneven load distribution.

1. Inspect weekly for deformation and weld seam cracks; repair or replace immediately if found; 2. Clean surface regularly to remove drilling fluid residues and dust, touching up anti-corrosion paint if peeling; 3. Avoid overloading the dolly beyond its rated capacity to prevent structural damage.

2

P1100288AA

Channel steel L=950

High-strength structural steel (Q355B); hot-rolled forming; surface shot blasting + anti-corrosion paint coating; length 950mm; auxiliary frame component, supporting and connecting main frame parts.

1. Wear at connection points from long-term vibration and friction; 2. Corrosion from dust and moisture accumulation; 3. Bending deformation from accidental impact with drill site equipment.

1. Check connection fasteners weekly for tightness to reduce friction wear; 2. Wipe surface with a dry cloth monthly to prevent dust and moisture buildup; 3. Use padding to protect the channel steel during equipment movement to avoid impact.

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P9920170AA

Channel steel

High-strength structural steel (Q355B); hot-rolled forming; surface shot blasting + anti-corrosion paint coating; custom length matching the ZJ40 dolly; used to reinforce the frame and distribute load evenly.

1. Fatigue wear from long-term repeated load stress; 2. Corrosion from saltwater (for coastal drill sites) or humid environments; 3. Deformation from improper storage or stacking of heavy objects.

1. Inspect quarterly for fatigue cracks using visual inspection; replace if cracks appear; 2. For coastal drill sites, clean and re-coat anti-corrosion paint every 6 months; 3. Store in a flat, dry area, avoiding heavy object stacking on the channel steel.

1

P6001694AA

Lifting eye

High-strength alloy steel (40CrNiMoA); heat-treated for high toughness and tensile strength; surface anti-corrosion plating; precision machined to match hoisting ropes, designed for dolly and equipment hoisting.

1. Wear at the rope contact surface from long-term hoisting friction; 2. Fatigue cracking from repeated hoisting load stress; 3. Corrosion from drilling fluid and outdoor exposure.

1. Inspect the lifting eye before each hoisting operation for cracks or wear; replace if damaged; 2. Use hoisting ropes of matching specifications to avoid uneven friction; 3. Lubricate the contact surface with anti-rust grease after each use to reduce wear and corrosion.

2

P1100288AA

Location sleeve

High-carbon steel (45#); heat-treated for hardness and wear resistance; surface polished; precision machined to match the dolly’s positioning pins, ensuring accurate dolly positioning on the drill site.

1. Wear at the inner hole surface from long-term insertion and extraction of positioning pins; 2. Deformation from improper positioning force; 3. Corrosion from dust and moisture entering the inner hole.

1. Apply a small amount of anti-rust grease to the inner hole before installation to reduce friction; 2. Ensure gentle operation during positioning to avoid excessive force; 3. Clean the inner hole monthly to remove dust and debris.

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4500100034

Bearing 180206

High-carbon chromium bearing steel (GCr15); quenched and tempered for high hardness and wear resistance; sealed design; model 180206 (single-row deep groove ball bearing); reduces friction between the dolly’s rotating parts (e.g., sheave and shaft).

1. Wear of inner/outer rings and rollers from long-term high-speed rotation; 2. Seizure due to insufficient lubrication or lubricant contamination; 3. Corrosion from moisture entry (seal failure).

1. Lubricate monthly with high-temperature anti-wear lithium-based grease; 2. Inspect seals regularly to prevent dust and moisture entry; 3. Replace immediately if abnormal noise or overheating occurs during operation.

2

P0300028AA

Sheave

High-carbon alloy steel (GCr15); quenched and tempered for high hardness; groove surface polished; designed to guide hoisting ropes, reducing rope wear and ensuring smooth rope movement during dolly hoisting.

1. Groove wear from long-term friction with hoisting ropes; 2. Surface corrosion from drilling fluid splashes; 3. Internal damage from bearing failure (leading to uneven rotation).

1. Inspect the groove weekly for wear; replace if groove depth exceeds 10% of the rope diameter; 2. Clean the sheave surface after each use to remove drilling fluid residues; 3. Ensure the matching bearing is well-lubricated to avoid uneven rotation.

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P2400136AA

Shaft

High-strength alloy steel (40Cr); heat-treated for toughness and wear resistance; precision ground; serves as the rotating shaft for the sheave and bearing, transmitting torque and bearing radial loads.

1. Wear at the bearing installation surface from continuous rotation; 2. Fatigue bending from uneven load distribution; 3. Corrosion from internal moisture (if seal fails).

1. Inspect quarterly for wear and corrosion; replace if wear exceeds 0.5mm; 2. Ensure proper lubrication of the matching bearing to reduce friction; 3. Check seals regularly to prevent moisture entry.

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P6001691AA

Stopper

High-strength structural steel (Q355B); heat-treated for toughness; precision machined; limits the movement range of the dolly’s rotating parts (e.g., sheave), preventing over-rotation and collision.

1. Wear at the contact surface from repeated collision; 2. Deformation from heavy impact; 3. Corrosion from outdoor moisture and dust.

1. Inspect monthly for wear and deformation; replace if wear exceeds 1mm; 2. Adjust the stopper position regularly to ensure effective limiting; 3. Clean the surface and apply anti-rust grease to prevent corrosion.

2

4313700040

Retaining ring

High-carbon steel (65Mn); heat-treated for elasticity and toughness; surface galvanized; used to fix the bearing and shaft, preventing axial movement of rotating components.

1. Fatigue failure (loss of elasticity) from long-term vibration; 2. Corrosion from moisture and dust; 3. Deformation from improper installation or disassembly.

1. Inspect monthly for elasticity; replace if flattened or deformed; 2. Use special tools for installation/disassembly to avoid damage; 3. Clean and apply anti-rust oil before installation.

3

4309300027

Nut M24

High-strength alloy steel (35CrMoA); heat-treated for high hardness; internal thread precision machined; surface anti-rust plating; size M24; fastens the shaft, sheave, and other components tightly.

1. Thread wear from repeated tightening/loosening; 2. Corrosion from drilling fluid splashes; 3. Cracking from over-tightening or impact.

1. Use a torque wrench to tighten to the specified torque (avoid over-tightening); 2. Clean threads regularly and apply anti-rust grease; 3. Replace immediately if threads are damaged or the nut is cracked.

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4313100027

Spring washer 27

High-carbon steel (65Mn); heat-treated for elasticity; surface galvanized; size 27mm; absorbs vibration, preventing nut loosening under drill site vibration.

1. Fatigue failure (loss of elasticity) from long-term vibration; 2. Corrosion from outdoor moisture; 3. Deformation from over-tightening.

1. Replace spring washers every 3 months or when they lose elasticity; 2. Do not reuse flattened or deformed washers; 3. Clean before installation to remove rust and debris.

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P6001692AA

Reinforced plate 220X130

High-strength structural steel (Q355B); thickness matching dolly frame; size 220mm×130mm; welded to frame connection points to reinforce structural strength, preventing frame deformation.

1. Weld seam cracking from long-term vibration; 2. Corrosion from drilling fluid splashes; 3. Wear at the connection surface from load stress.

1. Inspect weld seams monthly for cracks; repair immediately if found; 2. Clean the surface weekly to remove drilling fluid residues; 3. Avoid heavy impact on the reinforced plate during operation.

2

P6001693AA

Plate

High-strength structural steel (Q235B); precision machined; surface anti-corrosion paint; used to cover and protect internal components (e.g., bearing, shaft) from dust and drilling fluid.

1. Corrosion from outdoor moisture and dust; 2. Deformation from accidental impact; 3. Wear at the edge from long-term contact with other components.

1. Clean the surface monthly to remove dust and debris; 2. Touch up anti-corrosion paint if peeling occurs; 3. Protect the plate with padding during maintenance to avoid impact.

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P6100534AA

Cover plate

High-strength structural steel (Q235B); precision machined; surface anti-corrosion plating; covers the dolly’s opening parts, preventing dust, drilling fluid, and debris from entering internal components.

1. Corrosion from drilling fluid and outdoor exposure; 2. Loosening of fixing screws leading to edge wear; 3. Deformation from improper installation.

1. Check fixing screws weekly for tightness; 2. Clean the cover plate surface after each use; 3. Ensure proper alignment during installation to avoid deformation.

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Are these parts compatible only with the SJ Petro ZJ40 Dolly (Z05010800001AA)? Can they be used for other ZJ40 dolly models?

All parts listed are exclusively designed and manufactured for the SJ Petro ZJ40 Dolly with part number Z05010800001AA, ensuring 100% compatibility with the original equipment. They cannot be directly used for other ZJ40 dolly models, as different dolly models may have differences in structural dimensions, load-bearing capacity, and part specifications. Using these parts for other models will cause compatibility issues, leading to component loosening, structural damage, or operational failure. For other ZJ40 dolly models, please provide the specific dolly part number, and we will provide matching genuine accessories.

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What is the service life of key components (e.g., bearing 4500100034, sheave P0300028AA), and how to extend their service life?

Under normal drill site operation conditions, the service life of the bearing (4500100034) is 12 months, and the sheave (P0300028AA) is 18 months. To extend their service life: 1. Adhere to the monthly lubrication requirement for bearings, using qualified high-temperature anti-wear grease; 2. Inspect the sheave groove weekly for wear and replace worn hoisting ropes in time; 3. Clean all components regularly to remove drilling fluid residues and dust, maintaining anti-corrosion performance; 4. Avoid overloading the dolly and improper operation (e.g., violent impact) to reduce component fatigue.

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How to confirm the correct part when procuring, especially if the part name or model is unclear?

To ensure you procure the correct part, we recommend the following steps: 1. Prioritize using the original part number (e.g., P9920168AA for channel steel L=1064) – all parts in this guide have clear original model numbers, which are the most accurate identification basis; 2. If the part number is unclear (e.g., worn or missing), provide the part name, installation position on the dolly, and measurable dimensions (e.g., channel steel length); 3. Attach a clear photo of the old part if possible. Our technical team will confirm the correct part model for you based on the information provided, avoiding procurement errors. Do not guess the part model, as incorrect parts will affect dolly operation and pose safety hazards.