Hydraulic Parts for ZJ40 Truck-mounted Drilling Rig

1

Hydraulic pump lines

Z08090000001AA

High-pressure seamless steel pipe + anti-corrosion zinc plating, inner wall polished to meet ISO 4394-1 standard

1. Long-term high-pressure pulse leads to fatigue cracking of the pipe wall; 2. Vibration during drilling causes friction between the pipe and the rig frame, resulting in wear; 3. Corrosion caused by contact with drilling fluid and outdoor dust.

1. Regularly check the pipe surface for scratches and cracks, and replace immediately if found; 2. Install anti-wear sleeves at the friction points between the pipe and the frame; 3. Clean the pipe surface regularly to avoid corrosion by chemical substances.

1

Hose assembly 6

Z08330100080AA

Inner layer: NBR (nitrile rubber), reinforcement layer: 4-layer high-strength steel wire, outer layer: wear-resistant CR (chloroprene rubber), compliant with ISO 6803

1. Excessive bending during installation exceeds the minimum bending radius, damaging the steel wire layer; 2. High-temperature hydraulic oil accelerates rubber aging; 3. Pulse pressure fatigue leads to steel wire breakage.

1. Ensure the installation bending radius is not less than 6 times the hose diameter; 2. Avoid contact with high-temperature components of the rig; 3. Replace after 3-5 years of service even if no obvious damage is found.

2

M14X1.5-Z1/8" fitting

QBJ6051401

Carbon steel AISI 1045, zinc dichromate plating, thread compliant with ISO 261 and DIN 13-1

1. Over-tightening during installation causes thread sliding or seal surface damage; 2. Corrosion of thread by moisture and dust; 3. Vibration leads to loose connection and wear of the seal surface.

1. Use a torque wrench to tighten according to the standard torque (6-12 N·m); 2. Apply anti-corrosion sealant to the thread before installation; 3. Regularly check and re-tighten after long-term operation.

3

Plate

P7100184AA

Low-carbon steel Q235B, surface galvanized, thickness 8mm, load-bearing capacity meets GB/T 700-2006

1. Uneven stress during installation leads to deformation; 2. Corrosion caused by long-term exposure to outdoor rain and dust; 3. Impact damage from falling drilling tools.

1. Ensure the installation surface is flat and the fasteners are evenly stressed; 2. Regularly spray anti-corrosion paint on the surface; 3. Install a protective cover to avoid impact.

4

Bolt

P2200227AA

High-strength alloy steel 10.9 grade, surface black oxide treatment, tensile strength ≥ 1040MPa

1. Fatigue fracture caused by frequent vibration during drilling; 2. Over-tightening leads to thread damage; 3. Corrosion caused by contact with water and chemical substances.

1. Use matching high-strength nuts and spring washers; 2. Avoid over-tightening, follow the recommended torque; 3. Regularly check for rust and replace in time.

5

Spring washer 16

4313000016

65Mn spring steel, surface galvanized, hardness HRC 42-48, compliant with GB/T 93-1987

1. Fatigue loss of elasticity due to long-term compression; 2. Corrosion leads to fracture; 3. Incorrect specification selection causes deformation during installation.

1. Select washers matching the bolt size; 2. Replace together with bolts during maintenance; 3. Avoid reuse of deformed washers.

6

Bolt M6X16

4316806016

Alloy steel 8.8 grade, zinc plating, thread pitch 1.0mm, compliant with ISO 898-1

1. Vibration during drilling causes loose connection and thread wear; 2. Over-tightening leads to bolt breakage; 3. Corrosion of the bolt head causes difficulty in disassembly.

1. Apply thread locking agent after installation; 2. Regularly check and tighten during daily maintenance; 3. Clean the bolt head regularly to avoid rust.

7

Nut M6

4309300006

Carbon steel 45#, zinc plated, thread compliant with ISO 262, hardness HRC 28-32

1. Thread wear caused by frequent disassembly and assembly; 2. Corrosion leads to thread jamming; 3. Vibration causes loose connection and damage to the contact surface.

1. Avoid violent disassembly and assembly, use appropriate tools; 2. Store in a dry environment when not in use; 3. Replace if thread sliding occurs.

8

Spring washer 6

4313000006

65Mn spring steel, surface anti-corrosion treatment, inner diameter 6mm, outer diameter 12mm

1. Elastic failure due to long-term compression under high load; 2. Corrosion causes cracking; 3. Incorrect installation leads to uneven force and deformation.

1. Ensure the washer is installed flat without tilting; 2. Replace regularly during routine maintenance; 3. Do not use washers with obvious rust or deformation.

1

Front drive lines

Z08340000001AA

High-strength seamless steel pipe, heat-treated to improve fatigue resistance, surface anti-corrosion coating, compliant with API Spec 7K

1. High torque during driving causes pipe wall fatigue; 2. Vibration during drilling and driving leads to joint wear; 3. Corrosion caused by outdoor harsh environment and drilling fluid pollution.

1. Regularly check the pipe for deformation and joint tightness; 2. Avoid sudden acceleration and deceleration to reduce torque impact; 3. Clean the pipe surface and reapply anti-corrosion coating regularly.

2

Hose assembly 6

Z08330000001AA

Inner layer: FKM (fluorine rubber) for high temperature resistance, reinforcement layer: 6-layer steel wire winding, outer layer: wear-resistant and oil-resistant rubber, meeting ISO 18752

1. Excessive bending and stretching during movement causes steel wire layer damage; 2. High-temperature and high-pressure hydraulic oil accelerates rubber aging; 3. Friction with other components leads to outer layer wear.

1. Reserve sufficient length during installation to avoid stretching and over-bending; 2. Install protective sleeves at friction points; 3. Regularly check the hose for bulging and cracks, replace immediately if found.

3

M14X1.5-Z1/8" bend fitting

QBJ6051401

Stainless steel 316, passivated surface for enhanced corrosion resistance, thread precision machining, compliant with ISO 965-1

1. Stress concentration at the bend caused by vibration leads to cracking; 2. Thread wear due to improper installation and disassembly; 3. Corrosion in humid and dusty environments.

1. Avoid excessive force during installation, use torque wrench to control tightness; 2. Regularly clean the thread and apply anti-rust oil; 3. Check the bend for cracks regularly, replace if any abnormality is found.

What is the main difference between the two hose assemblies (Z08330100080AA and Z08330000001AA) in this document?

The main difference lies in the inner rubber layer and reinforcement layer: Z08330100080AA uses NBR inner layer (suitable for ordinary hydraulic oil) and 4-layer steel wire reinforcement; Z08330000001AA uses FKM inner layer (high temperature and corrosion resistant) and 6-layer steel wire winding, which is more suitable for the high-temperature and high-pressure environment of the front drive system.

How often should the hydraulic pump lines (Z08090000001AA) and front drive lines (Z08340000001AA) be inspected and replaced?

Daily inspection: Check for leakage, deformation and wear; Weekly inspection: Tighten joints and clean the surface; Monthly inspection: Conduct pressure test. The recommended replacement cycle is 2-3 years under normal drilling conditions; if there are obvious cracks, deformation or frequent leakage, replace immediately regardless of the service life.

Can the M14X1.5-Z1/8" fitting (QBJ6051401) be reused after disassembly?

It is not recommended to reuse it. After disassembly, the thread and seal surface of the fitting will inevitably have wear, which may lead to oil leakage when reused. In addition, the anti-corrosion coating on the surface will be damaged during disassembly, reducing its service life. For the reliability of the hydraulic system, it is recommended to use a new fitting during reassembly.