SJ ZJ40 Truck-mounted Drilling Rig Cathead Cylinder Accessories-2

1

Cathead cylinder

Z07150000016AA

High-strength carbon steel alloy (45# steel), precision forged

1. Long-term high-pressure operation leads to cylinder wall fatigue; 2. Hydraulic oil contamination causes internal wear; 3. Improper installation leads to uneven stress

1. Regularly filter hydraulic oil to keep it clean (particle size ≤ 10μm); 2. Check installation alignment quarterly to avoid eccentric load; 3. Avoid sudden pressure changes during operation

2

Cylinder body

P2300218AA

High-strength seamless steel pipe, quenched and tempered

1. Hydraulic oil contains hard impurities causing inner wall scratches; 2. Long-term reciprocation of piston leads to wear; 3. Corrosion by moisture in hydraulic oil

1. Replace hydraulic oil and filter element every 6 months; 2. Check inner wall for scratches regularly, repair if found; 3. Keep hydraulic system dry to prevent moisture intrusion

3

Piston

P0700067AA

Aluminum alloy (6061-T6), with wear-resistant coating

1. Uneven pressure distribution leads to local wear; 2. Wear of sealing rings causes oil leakage and abnormal friction; 3. Excessive cylinder temperature accelerates material aging

1. Check piston surface wear and coating integrity monthly; 2. Replace sealing rings regularly to ensure sealing performance; 3. Control cylinder operating temperature below 80℃

4

Piston rod

P0900147AA

Chromium-plated carbon steel (40Cr), high-precision grinding

1. External collision causes surface chrome layer damage; 2. Dust and impurities enter the cylinder causing wear; 3. Long-term high load leads to bending deformation

1. Install protective sleeve to avoid collision during transportation and operation; 2. Clean piston rod surface before retracting to prevent dust entry; 3. Check straightness regularly, correct if bent

1

End cover

Z07150200003AA

Carbon steel (Q235B), precision machined

1. Uneven bolt tightening leads to deformation; 2. Hydraulic pressure impact causes fatigue damage; 3. Corrosion by external environmental factors

1. Tighten bolts in diagonal order to ensure uniform force; 2. Install buffer device to reduce pressure impact; 3. Apply anti-corrosion paint regularly to the surface

2

Cylinder head

P6013900AA

High-strength cast iron, surface anti-corrosion treatment

1. Sealing surface wear causes oil leakage; 2. Internal pressure overload leads to cracking; 3. Improper disassembly causes damage

1. Check sealing surface for scratches and wear regularly; 2. Do not exceed the maximum rated pressure of the cylinder; 3. Use special tools for disassembly and assembly

3

O ring φ101x5.3

P1101688AA

Nitrile rubber (NBR), high oil resistance

1. Hydraulic oil aging causes rubber hardening and cracking; 2. High temperature accelerates aging; 3. Sharp edges of parts scratch the O ring

1. Replace O rings every 3-6 months or when oil leakage is found; 2. Keep the installation position clean and free of sharp edges; 3. Store spare O rings in a cool and dry place

4

O ring φ106x5.3

5300100121

Nitrile rubber (NBR), shore hardness 70±5

1. Long-term compression leads to permanent deformation; 2. Contamination of hydraulic oil causes corrosion; 3. Installation deviation leads to uneven stress

1. Ensure correct installation position to avoid deviation; 2. Do not over-compress the O ring during assembly; 3. Use hydraulic oil that meets the specified grade

5

O ring φ41.2 x3.55

4313800060

Nitrile rubber (NBR), oil-resistant and high-pressure resistant

1. Small installation space causes extrusion damage; 2. Temperature changes lead to rubber contraction and expansion; 3. Impurities between the O ring and sealing surface cause wear

1. Clean the installation surface before assembly; 2. Choose the correct size of O ring, do not use oversized or undersized ones; 3. Avoid sudden temperature changes of the cylinder

6

Y type ring Yx-2-d60

5300100256

Fluororubber (FKM), high temperature and corrosion resistance

1. Reciprocating friction leads to lip wear; 2. Hydraulic oil contains impurities causing lip damage; 3. High temperature leads to rubber aging and brittleness

1. Check the lip for wear and damage monthly; 2. Ensure hydraulic oil cleanliness to avoid impurities; 3. Suitable for operating temperature -20℃ to 120℃

7

Dust ring

4309300024

Polyurethane (PU), wear-resistant and dust-proof

1. External dust and gravel wear the dust ring; 2. Piston rod surface scratches cause damage; 3. Long-term exposure to sunlight and rain accelerates aging

1. Clean the dust ring surface regularly to remove accumulated dust; 2. Check the piston rod surface for scratches; 3. Avoid direct sunlight and rain erosion

1

Guiding ring

P1101579AA

Polyoxymethylene (POM), self-lubricating

1. Eccentric load leads to uneven wear; 2. Lack of lubrication causes increased friction; 3. Hydraulic oil impurities cause scratching

1. Ensure the piston and piston rod are concentric; 2. Add appropriate lubricating oil to the guiding surface regularly; 3. Keep hydraulic oil clean to avoid impurities

2

Anti-wear ring

P9860284AA

Copper alloy (H62), wear-resistant and corrosion-resistant

1. Long-term reciprocating friction leads to wear; 2. High pressure causes material fatigue; 3. Hydraulic oil corrosion

1. Check the anti-wear ring thickness regularly, replace when worn to the limit; 2. Control the cylinder operating pressure within the rated range; 3. Use anti-corrosion hydraulic oil

3

Cushion ring

P1100159AA

Rubber and metal composite material, shock-absorbing

1. Hydraulic impact causes rubber layer detachment; 2. Long-term compression leads to permanent deformation; 3. High temperature accelerates aging

1. Check the rubber layer for detachment and cracks regularly; 2. Avoid sudden start and stop of the cylinder to reduce impact; 3. Control the operating temperature

4

Cushion sleeve

P1600201AA

Aluminum alloy, surface anodizing treatment

1. Impact load leads to deformation; 2. Wear caused by contact with other parts; 3. Corrosion by external environment

1. Avoid impact load during operation; 2. Check the fit between the cushion sleeve and other parts regularly; 3. Apply anti-corrosion coating to the surface

1

Pinshaft

P2400869AA

Carbon steel (45# steel), quenched and tempered

1. Frequent rotation leads to surface wear; 2. Lack of lubrication causes rust; 3. Impact load leads to bending or fracture

1. Add lubricating grease to the pinshaft regularly; 2. Check the surface for wear and rust monthly; 3. Avoid impact load during operation

2

Press plate

P2300219AA

Carbon steel (Q235B), surface galvanized

1. Bolt loosening leads to uneven stress and deformation; 2. Corrosion caused by external environment; 3. Wear caused by friction with other parts

1. Check and tighten bolts regularly; 2. Keep the press plate surface clean to avoid corrosion; 3. Check the fit with other parts to avoid friction

3

Tie rod

P1300105AA

High-strength steel rod, precision threaded

1. High tension leads to thread wear; 2. Corrosion causes thread rust and jamming; 3. Uneven force leads to bending

1. Check thread integrity and rust regularly; 2. Apply anti-rust grease to the thread; 3. Ensure uniform force when tightening

4

Coupling head

4317008020

Steel casting, surface machining

1. Torque overload leads to cracking; 2. Wear caused by connection with other components; 3. Corrosion by external environment

1. Do not exceed the maximum rated torque; 2. Check the connection surface for wear regularly; 3. Apply anti-corrosion paint to the surface

5

Nut M24

4313100024

Carbon steel (45# steel), heat-treated

1. Thread wear caused by frequent disassembly and assembly; 2. Loosening due to vibration during drilling; 3. Corrosion causes rust and jamming

1. Use a torque wrench to tighten to the specified torque; 2. Install a spring washer to prevent loosening; 3. Clean the thread and apply anti-rust grease

6

Spring washer 24

5300300062

65Mn spring steel, quenched and tempered

1. Fatigue deformation caused by long-term compression; 2. Rust caused by moisture and corrosion; 3. Fracture due to excessive pressure

1. Replace the spring washer when deformation or rust is found; 2. Do not over-compress during assembly; 3. Store in a dry and ventilated place

7

Spring washer 12

5300300062

65Mn spring steel, surface anti-rust treatment

1. Fatigue fracture caused by frequent vibration; 2. Corrosion leads to rust and loss of elasticity; 3. Improper installation causes deformation

1. Check the elasticity regularly, replace if lost; 2. Ensure correct installation direction; 3. Avoid contact with moisture and corrosive substances

8

Bolt M12x35

4313100012

High-strength bolt steel (10.9 grade), heat-treated

1. Thread wear caused by frequent disassembly and assembly; 2. Fracture due to overload; 3. Corrosion causes rust and jamming

1. Tighten to the specified torque, do not overload; 2. Check the bolt for cracks regularly; 3. Apply anti-rust grease to the thread

9

Set screw M8x20

5300300081

Carbon steel (45# steel), thread galvanized

1. Loosening due to vibration leads to thread wear; 2. Over-tightening causes thread damage; 3. Corrosion leads to rust

1. Tighten appropriately, do not over-tighten; 2. Check and re-tighten regularly during drilling operations; 3. Clean the thread and apply anti-rust grease

10

Elastic retaining ring 60

4313800040

65Mn spring steel, surface anti-rust treatment

1. Elastic loss caused by long-term expansion; 2. Wear caused by contact with other parts; 3. Fracture due to improper installation

1. Check elasticity regularly, replace if lost; 2. Use special tools for installation and disassembly; 3. Avoid scratching the retaining ring during assembly

11

Elastic retaining ring 40

4301312035

65Mn spring steel, quenched and tempered

1. Fatigue fracture caused by frequent disassembly and assembly; 2. Corrosion leads to rust and brittleness; 3. Improper installation causes deformation

1. Replace the retaining ring when rust or deformation is found; 2. Ensure the installation groove is clean and free of burrs; 3. Store in a dry place

1

Screw plug NPT1/4

P1200114AA

Carbon steel (Q235B), thread anti-rust treatment

1. Thread wear caused by frequent disassembly and assembly; 2. Loosening due to vibration leads to oil leakage; 3. Corrosion causes rust and jamming

1. Tighten appropriately after installation, do not over-tighten; 2. Check for oil leakage regularly; 3. Apply thread sealant to enhance sealing performance

2

Plug NPT1

QBJ120108

Carbon steel (45# steel), quenched and tempered

1. Thread damage caused by improper installation; 2. High pressure leads to seal failure; 3. Corrosion by hydraulic oil and external environment

1. Use a torque wrench for installation to avoid thread damage; 2. Check the sealing performance regularly; 3. Replace the plug if thread damage is found

1

Are all these accessories fully compatible with the SJ ZJ40 truck-mounted drilling rig cathead cylinder?

Yes, all accessories are specially designed and produced for the SJ ZJ40 truck-mounted drilling rig cathead cylinder (model: Z07150000016AA), with accurate models and sizes, fully compatible with the original equipment. They also comply with EN 16228-7:2014+A1:2021 interface safety standards, ensuring stable connection and safe operation.

2

How often should the key wearing parts (such as O rings, guiding rings) be replaced?

The replacement cycle depends on the frequency of equipment use and working environment: under normal drilling conditions (8 hours a day, 5 days a week), O rings should be replaced every 3-6 months, and guiding rings and anti-wear rings should be replaced every 12 months. If working in harsh environments (more dust, high humidity), the replacement cycle should be shortened by 30%.

3

What should I do if the cathead cylinder is jammed during operation?

First, stop the equipment immediately and cut off the hydraulic supply to avoid further damage. Then check the following: 1. Whether the guiding ring is worn or deformed (leading to eccentric movement); 2. Whether the piston rod is bent; 3. Whether there are impurities in the cylinder causing jamming. Replace worn parts, correct the piston rod, or clean the cylinder according to the inspection results. Do not force the cylinder to move, otherwise, it will cause more serious damage to the cylinder body and piston.