Latch Pin Cylinder for ZJ40 Truck-mounted Drilling Rig (Z07320000005AA)

1

Latch pin cylinder

Z07320000005AA

High-strength carbon steel (45#) cylinder body, heat-treated alloy steel piston, anti-corrosion coating

1. Internal leakage from worn seals; 2. Piston jamming due to contaminated hydraulic fluid; 3. Cylinder block wear from long-term high-pressure operation.

1. Use clean, compatible hydraulic oil (ISO VG 46); 2. Inspect for leakage monthly and replace seals promptly; 3. Avoid overloading the cylinder beyond its rated force.

1

Cylinder block

Z07330201002AA

Seamless carbon steel (20#) with honed inner wall and zinc plating for anti-corrosion

1. Inner wall wear from contaminated hydraulic fluid; 2. Corrosion from moisture and drilling mud; 3. Deformation from external impact during rig transportation.

1. Filter hydraulic oil regularly to remove impurities; 2. Clean the cylinder block surface and touch up anti-corrosion coating; 3. Secure the cylinder during transportation to avoid impact.

2

Piston

Z07140300005AA

Heat-treated alloy steel (40Cr) with hard chrome plating on the surface

1. Surface wear from friction with the cylinder block; 2. Seal groove damage from improper seal replacement; 3. Corrosion from acidic hydraulic fluid.

1. Replace seals gently to avoid damaging the piston’s seal groove; 2. Use hydraulic oil with proper pH levels; 3. Inspect piston surface for scratches and polish if needed.

3

End cover

P0000248AA

Carbon steel (Q235) with anti-corrosion paint and rubber sealing surface

1. Seal surface damage from debris during installation; 2. Corrosion from drilling mud and moisture; 3. Loosening from rig vibration causing leakage.

1. Clean the seal surface before installation; 2. Tighten end cover bolts to specified torque monthly; 3. Touch up anti-corrosion paint if peeling occurs.

1

Pad eye

Z07290100002AA

Carbon steel (Q355B) with hot-dip galvanizing for anti-corrosion

1. Fatigue damage from repeated load-bearing; 2. Corrosion from salt spray (coastal oilfields); 3. Loosening of mounting bolts causing misalignment.

1. Inspect for cracks quarterly (non-destructive testing if needed); 2. Apply anti-corrosion grease in coastal environments; 3. Tighten mounting bolts regularly.

2

Pad

P6202019AA

High-wear rubber (NBR) with steel core reinforcement

1. Abrasion from contact with rig components during movement; 2. Aging and hardening from extreme temperatures; 3. Tear damage from excessive pressure.

1. Replace pads if wear exceeds 3mm; 2. Avoid exposing to temperatures beyond -20℃ to 70℃; 3. Ensure proper alignment to distribute pressure evenly.

3

Copper sleeve

P1100761AA

Red copper (T2) with precision machining for wear resistance

1. Wear from friction with moving components; 2. Seizure due to lack of lubrication; 3. Damage from improper installation (forced fitting).

1. Apply molybdenum disulfide lubricant during installation; 2. Inspect for wear every 6 months; 3. Use proper tools to avoid forced fitting.

4

Supporting ring

P1100660AA

Carbon steel (45#) with heat treatment for enhanced rigidity

1. Deformation from excessive load; 2. Corrosion from drilling mud; 3. Fatigue damage from long-term vibration.

1. Ensure load does not exceed the ring’s rated capacity; 2. Clean regularly to remove mud and debris; 3. Replace if deformation is detected.

1

Z1/4" plug

QBJ120102

Brass (H62) with NPT thread and rubber seal

1. Thread damage from over-tightening; 2. Seal wear from debris on the thread; 3. Corrosion from moisture.

1. Tighten to specified torque (do not over-tighten); 2. Clean threads before installation; 3. Apply thread sealant for enhanced leakage prevention.

2

O ring φ43.7X3.55

5300100128

Nitrile rubber (NBR) with shore hardness 70±5

1. Aging from long-term exposure to hydraulic oil and high temperatures; 2. Damage from sharp edges in the seal groove; 3. Extrusion damage from excessive pressure.

1. Replace O-rings every 6 months as a preventive measure; 2. Smooth any sharp edges in the seal groove; 3. Ensure system pressure does not exceed the O-ring’s rating.

3

O ring φ48.7X3.55

5300100142

Nitrile rubber (NBR) with shore hardness 70±5

1. Abrasion from contaminated hydraulic fluid; 2. Hardening from extreme cold temperatures; 3. Misalignment causing uneven wear.

1. Keep hydraulic oil clean to avoid debris; 2. Avoid exposing to temperatures below -20℃; 3. Ensure proper O-ring alignment during installation.

4

O ring φ25X2.65

5300100075

Nitrile rubber (NBR) with shore hardness 70±5

1. Tear damage from improper installation tools; 2. Chemical erosion from incompatible hydraulic oil; 3. Fatigue from repeated cylinder movement.

1. Use plastic tools to install O-rings; 2. Ensure hydraulic oil is compatible with NBR; 3. Inspect for tears before installing.

1

Nut M20

4309300020

High-strength carbon steel (8.8 grade) with zinc plating

1. Thread wear from repeated tightening/loosening; 2. Corrosion from drilling mud and moisture; 3. Fatigue failure from over-tightening.

1. Replace nuts after 3-4 disassembly cycles; 2. Clean threads and apply anti-corrosion grease; 3. Use a torque wrench to ensure proper tightening.

2

Spring washer 8

4313000008

Carbon steel (65Mn) with heat treatment for elasticity

1. Loss of elasticity from long-term compression; 2. Corrosion leading to rust and breakage; 3. Deformation from over-tightening.

1. Replace spring washers every 6 months; 2. Discard any rusted or deformed washers; 3. Do not over-tighten nuts to avoid washer deformation.

3

Allen bolt

4101800008

High-strength alloy steel (10.9 grade) with black oxide coating

1. Head damage from improper Allen wrench size; 2. Thread wear from contaminated mounting surfaces; 3. Corrosion from moisture.

1. Use the correct size Allen wrench; 2. Clean mounting surfaces before installation; 3. Apply anti-corrosion coating to exposed bolt heads.

Are these components only compatible with the ZJ40 Truck-mounted Drilling Rig?

Yes, all components—including the main latch pin cylinder (Z07320000005AA)—are exclusively designed for the ZJ40 Truck-mounted Drilling Rig. They are not interchangeable with other ZJ series rigs or non-ZJ rigs, as dimensions, hydraulic ratings, and mounting specifications are tailored to the ZJ40’s mobile design. Using non-compatible parts will cause leaks, jamming, or system failure.

How often should I replace the O-rings in the latch pin cylinder?

We recommend replacing all O-rings every 6 months as a preventive measure to avoid leakage. In harsh environments (dusty, muddy, or coastal oilfields), replace them every 4 months. If you notice hydraulic leakage or O-ring hardening/aging, replace the affected O-rings immediately.

What should I do if the latch pin cylinder piston jams?

If the piston jams: 1. Stop the hydraulic system to avoid further damage. 2. Check for hydraulic fluid contamination—flush the system if needed. 3. Inspect the copper sleeve (P1100761AA) and piston (Z07140300005AA) for wear; replace or polish worn parts. 4. Ensure the cylinder block (Z07330201002AA) inner wall is clean and smooth. 5. Refill with clean hydraulic oil and test the cylinder before resuming use.