Front Suspension Assembly & Related Parts for ZJ40 Drilling Rig

1

Z02040000016AA

Front suspension assembly

High-strength alloy steel (40CrNiMoA), quenched and tempered to enhance toughness and load-bearing capacity; surface treated with epoxy anti-rust coating to resist corrosion from rain, mud, and drilling fluids

1. Fatigue deformation from long-term exposure to loads exceeding the rated capacity; 2. Welding seam cracking caused by frequent severe vibration during rig operation; 3. Corrosion due to long-term outdoor exposure and chemical contact.

1. Strictly follow the rated load (not exceeding 110% of the rated value) during operation; 2. Inspect welding seams monthly for cracks, repairing immediately if found; 3. Clean the surface with neutral detergent after use and reapply anti-rust coating annually.

1

Z02040100001AA

Fixed rod, front axle

High-strength seamless steel pipe (20Mn2) with alloy steel connectors; surface galvanized for anti-rust protection; precision-machined for dimensional accuracy

1. Bending deformation caused by uneven lateral force during rig turning or uneven ground operation; 2. Wear of connecting ends due to lack of lubrication; 3. Corrosion and rust from long-term outdoor exposure.

1. Avoid sharp turns or rapid direction changes when the rig is fully loaded; 2. Lubricate connecting ends with lithium-based grease every 40 working hours; 3. Store in a dry, covered area when not in use to prevent galvanized layer damage.

1

5001200002

Front steel plate spring assembly

High-carbon spring steel (60Si2MnA), heat-treated for elasticity and fatigue resistance; surface shot blasting + anti-rust coating; multi-layer plate structure for enhanced load-bearing

1. Fatigue fracture of spring plates due to long-term repeated vibration; 2. Wear between plates caused by lack of lubrication; 3. Corrosion and rust from rain, mud, or chemical drilling fluids.

1. Apply graphite lubricant between spring plates every 30 working hours to reduce friction; 2. Inspect for cracks or deformation monthly, replacing damaged plates promptly; 3. Clean the assembly after use and reapply anti-rust coating if peeling occurs.

2

P7100319AA

Tray, steel plate spring

Cast alloy steel (ZG35CrMo), annealing treatment to eliminate internal stress; surface anti-rust paint coating; precision-machined to fit the steel plate spring

1. Crack formation due to local stress concentration during heavy-load operation; 2. Wear of the contact surface caused by long-term friction with the steel plate spring; 3. Paint peeling and corrosion from outdoor exposure.

1. Ensure the tray is properly aligned with the steel plate spring to distribute load evenly; 2. Inspect the contact surface for wear quarterly, replacing if wear exceeds 0.8mm; 3. Touch up anti-rust paint on peeling areas promptly.

3

P9860075AA

U type bolt, steel plate

Alloy steel (35CrMoA), heat-treated for high tensile strength (grade 10.9); surface black oxide treatment; U-shaped design for secure clamping

1. Thread wear or fracture due to over-tightening during assembly; 2. Fatigue failure caused by frequent vibration; 3. Corrosion of threads from moisture or chemical contact.

1. Tighten with a torque wrench to the specified torque (55-60N·m) during assembly; 2. Inspect threads for wear or deformation monthly, replacing if damaged; 3. Apply thread lock compound during installation to prevent loosening from vibration.

4

P6000844AA

Upper block, front steel plate spring

High-density nitrile rubber (NBR) with steel core; shore hardness 65-70° for excellent buffer performance; oil-resistant and weather-resistant

1. Aging and cracking caused by high temperature, vibration, or oil contamination; 2. Compression deformation due to long-term heavy loads; 3. Damage from sharp debris during operation.

1. Replace the upper block every 6 months or if cracks are found; 2. Ensure the block is properly seated to avoid uneven compression; 3. Protect the block from sharp objects during operation and storage.

1

Z02040300001AA

Buffer block

High-density chloroprene rubber (CR); wear-resistant, shock-absorbent, and resistant to aging; reinforced with a steel insert for structural stability

1. Hardening and cracking due to long-term exposure to sunlight, high temperature, or chemical agents; 2. Tearing caused by excessive impact during rough terrain operation; 3. Compression fatigue from repeated load-bearing.

1. Replace the buffer block every 8 months or if cracks/hardening are found; 2. Avoid operating the rig at high speed on extremely rough terrain to reduce impact; 3. Store in a cool, dry place away from direct sunlight when not in use.

2

4310000022

Nut M22X1.5

Carbon steel (Q355B), heat-treated for hardness; surface zinc-plated to resist corrosion; internal thread precision-machined (M22X1.5)

1. Thread stripping due to over-tightening or mismatch with bolts; 2. Rust and seizing caused by moisture, leading to difficulty in disassembly; 3. Deformation of the nut body due to uneven torque during tightening.

1. Use only with matching M22X1.5 bolts (grade 10.9); 2. Tighten with a torque wrench to the specified torque (50-55N·m); 3. Apply anti-seize compound to threads before installation to prevent rust and seizing.

3

P1200102AA

Nut M22X1.5

Carbon steel (Q355B), heat-treated for hardness; surface zinc-plated to resist corrosion; internal thread precision-machined (M22X1.5); thickened design for enhanced load-bearing

1. Thread wear from repeated disassembly and assembly; 2. Corrosion between the nut and bolt due to humid environments; 3. Flange deformation caused by uneven torque during tightening.

1. Minimize repeated disassembly; replace nuts after 5 disassembly cycles; 2. Clean threads with a wire brush before installation to remove rust or debris; 3. Tighten evenly to avoid flange deformation.

4

4313200022

Flat washer 22

Carbon steel (Q235), precision-machined for flatness; surface zinc-plated anti-rust treatment; smooth surface to reduce friction between the nut and component

1. Wear and thinning caused by long-term friction between the nut and component; 2. Deformation due to uneven pressure; 3. Rust and corrosion from moisture.

1. Inspect the washer for deformation or wear monthly, replacing if needed; 2. Ensure the washer is properly aligned to distribute pressure evenly; 3. Store in a dry environment to prevent rust.

1

P2200137AA

Pin shaft, locating tie rod

Alloy steel (35CrMoA), carburized and quenched for surface hardness (HRC 58-62); precision-machined for dimensional accuracy; surface black oxide treatment

1. Wear of the pin surface due to long-term rotation and friction; 2. Shear failure caused by uneven lateral force during steering; 3. Corrosion from moisture or chemical drilling fluids.

1. Lubricate the pin with lithium-based grease every 30 working hours; 2. Check the pin for bending or deformation monthly, replacing if found; 3. Apply anti-rust grease to the pin before installation and after maintenance.

2

4316500024

Locking nut M24X1.5

Alloy steel (40Cr), heat-treated for high strength; surface zinc-plated anti-rust treatment; internal thread precision-machined (M24X1.5); self-locking design to prevent loosening

1. Thread wear due to over-tightening or repeated disassembly; 2. Self-locking function failure caused by corrosion; 3. Deformation due to uneven torque during tightening.

1. Tighten with a torque wrench to the specified torque (65-70N·m); 2. Replace the locking nut if the self-locking function fails (e.g., loose after tightening); 3. Apply anti-seize compound to threads before installation.

3

P1000095AA

Flat washer, locating tie rod

High-carbon steel (SK5), heat-treated for flatness and hardness; surface anti-rust plating; designed to fit the locating tie rod’s connection point

1. Wear caused by frequent vibration and friction; 2. Deformation due to uneven pressure; 3. Corrosion in humid or chemical environments.

1. Replace the washer every time the locking nut is disassembled; 2. Ensure the washer is properly seated to avoid uneven pressure; 3. Clean the washer and connection surface before installation.

4

Z02040400002AA

Rubber liner assembly, locating tie rod

Nitrile rubber (NBR), oil-resistant and wear-resistant; flexible design to absorb vibration; steel core for structural support

1. Aging and cracking caused by vibration, high temperature, or oil contamination; 2. Tearing due to excessive stretching during installation or operation; 3. Damage from sharp debris.

1. Replace the rubber liner every 7 months or if cracks are found; 2. Install the liner gently, avoiding excessive stretching; 3. Protect the liner from sharp objects during operation.

1

4302414120

Bolt M14X1.25X120

Alloy steel (35CrMoA), heat-treated for high tensile strength (grade 10.9); surface black oxide treatment; precision-machined thread (M14X1.25)

1. Thread wear or fracture due to over-tightening during assembly; 2. Fatigue failure caused by frequent vibration; 3. Corrosion of the bolt body from moisture or chemical contact.

1. Tighten with a torque wrench to the specified torque (35-40N·m); 2. Inspect the bolt for bending or thread damage monthly, replacing if needed; 3. Apply anti-rust grease to the bolt body before installation.

2

4310000014

Nut M14X1.25

Carbon steel (Q355B), heat-treated for hardness; surface zinc-plated anti-rust treatment; internal thread precision-machined (M14X1.25)

1. Thread stripping due to over-tightening or mismatch with bolts; 2. Rust and seizing caused by moisture; 3. Deformation due to uneven torque during tightening.

1. Use only with matching M14X1.25 bolts (grade 10.9); 2. Clean threads with a wire brush before installation; 3. Do not reuse nuts that have been over-tightened or deformed.

3

4313000014

Spring washer 14

Spring steel (65Mn), heat-treated for elasticity and toughness; surface zinc-plated anti-rust treatment; designed to prevent nut loosening from vibration

1. Elastic fatigue and deformation caused by long-term compression and vibration; 2. Rust and corrosion leading to breakage; 3. Damage from over-tightening during assembly.

1. Replace the spring washer every time the nut is disassembled; 2. Store in a dry environment to prevent rust; 3. Do not over-tighten the nut, as this will damage the washer’s elasticity.

1

P9870054AA

Clamping sleeve

Alloy steel (20CrMnTi), carburized and quenched for wear resistance; precision-machined inner and outer diameters; surface anti-rust treatment

1. Wear of the inner surface due to friction with the shaft pin; 2. Scratches caused by debris entering the sleeve; 3. Deformation due to excessive clamping force during assembly.

1. Clean the sleeve and shaft pin before assembly to remove debris; 2. Apply a thin layer of lubricant to the inner surface before installation; 3. Tighten the clamping mechanism to the specified torque to avoid deformation.

2

Z02040400001AA

Rubber sleeve assembly

Chloroprene rubber (CR), oil-resistant and weather-resistant; steel core for structural stability; flexible design to absorb vibration

1. Aging, cracking, and hardening caused by long-term exposure to sunlight, high temperature, or oil; 2. Tearing due to excessive stretching during installation; 3. Damage from sharp debris.

1. Replace the rubber sleeve every 8 months or if cracks are found; 2. Install the sleeve gently, avoiding excessive stretching; 3. Protect the sleeve from sharp objects during operation and storage.

3

P1400101AA

Internal shaft pin, balance beam

Alloy steel (40CrNiMoA), heat-treated for high tensile strength and toughness; surface grinding for precision; carburized for wear resistance

1. Fatigue wear caused by frequent rotation and heavy loads; 2. Corrosion from internal lubricating oil contamination; 3. Shear failure due to uneven force distribution.

1. Replace the lubricating oil regularly to avoid contamination; 2. Inspect the pin for wear or cracks every 40 working hours; 3. Ensure the pin is properly aligned to distribute force evenly.

4

P9870116AA

Sleeve, pin shaft

Alloy steel (20CrMnTi), carburized and quenched for surface hardness; precision-machined inner and outer diameters; self-lubricating design

1. Wear of the inner surface due to friction with the pin shaft; 2. Scratches caused by debris entering the sleeve; 3. Corrosion from moisture or chemical contact.

1. Lubricate the sleeve’s inner surface before installing the pin shaft; 2. Clean the sleeve thoroughly to remove debris before assembly; 3. Replace the sleeve if inner surface wear exceeds 0.8mm.

5

P2000094AA

External shaft pin, balance beam

Alloy steel (40Cr), heat-treated for high strength and toughness; surface black oxide treatment; precision-machined for dimensional accuracy

1. Wear of the pin surface due to long-term rotation and friction; 2. Shear failure caused by uneven force; 3. Corrosion in humid environments.

1. Lubricate the pin with lithium-based grease every 30 working hours; 2. Check the pin for bending or deformation monthly, replacing if found; 3. Apply anti-rust grease to the pin before installation.

6

P2200291AA

Set screw, shaft pin, balance beam

Alloy steel (40Cr), heat-treated for high hardness; surface black oxide treatment; precision-machined thread for secure locking

1. Thread damage due to cross-threading during installation; 2. Shear failure caused by excessive force; 3. Corrosion from moisture or oil.

1. Align the screw with the thread hole correctly before tightening, avoiding cross-threading; 2. Do not use the set screw to bear excessive force; 3. Apply thread lock compound and anti-rust grease during installation.

7

4317400018

Thick nut M18X1.5

Carbon steel (Q355B), thickened flange for enhanced load-bearing; surface zinc-plated anti-rust treatment; internal thread precision-machined (M18X1.5)

1. Thread stripping due to over-tightening or mismatch with bolts; 2. Rust and seizing caused by moisture; 3. Flange deformation from uneven torque.

1. Use only with matching M18X1.5 bolts; 2. Tighten with a torque wrench to the specified torque (35-40N·m); 3. Apply anti-seize compound to threads before installation.

8

4313000018

Spring washer 18

Spring steel (65Mn), heat-treated for elasticity; surface zinc-plated anti-rust treatment; designed to prevent nut loosening from vibration

1. Elastic fatigue and deformation caused by long-term vibration; 2. Rust and breakage from moisture; 3. Damage from over-tightening.

1. Replace the washer every time the nut is disassembled; 2. Store in a dry environment to prevent rust; 3. Avoid over-tightening the nut to preserve the washer’s elasticity.

9

4313200018

Flat washer 18

Carbon steel (Q235), precision-machined for flatness; surface zinc-plated anti-rust treatment; smooth surface to reduce friction

1. Wear and thinning caused by long-term friction between the nut and component; 2. Deformation due to uneven pressure; 3. Rust and corrosion from moisture.

1. Inspect the washer for deformation or wear monthly, replacing if needed; 2. Ensure the washer is properly aligned to distribute pressure evenly; 3. Clean the washer surface before installation.

10

P1000097AA

Locating ring, shaft pin, balance beam

Carbon steel (Q235), precision-machined for dimensional accuracy; surface zinc-plated anti-rust treatment; designed to position the shaft pin securely

1. Wear caused by friction between the locating ring and shaft pin; 2. Deformation due to uneven pressure; 3. Rust and seizing caused by moisture.

1. Inspect the locating ring’s inner diameter regularly, replacing if wear exceeds 0.6mm; 2. Ensure the ring is properly seated to avoid uneven pressure; 3. Clean the ring and shaft pin before assembly.

11

P1100334AA

Shaft sleeve

Phosphor bronze (QSn6-6-3), high wear resistance and self-lubricating performance; precision-machined inner and outer diameters; corrosion-resistant

1. Wear of the inner surface due to lack of lubrication and frequent rotation; 2. Scratches caused by debris entering the sleeve; 3. Deformation due to excessive pressure.

1. Inject lubricating oil into the sleeve every 25 working hours to ensure self-lubrication; 2. Clean the sleeve and shaft before assembly to remove debris; 3. Replace the sleeve if the inner diameter wear exceeds 1mm.

1

Can the two M22X1.5 nut models (4310000022 and P1200102AA) be used interchangeably?

While both nuts have the same thread specification (M22X1.5), P1200102AA has a thickened flange for enhanced load-bearing and stability, designed for high-vibration positions. 4310000022 is a standard thin nut for low-vibration areas. They are not fully interchangeable—using the wrong nut may lead to loosening or component damage.

2

How often should I inspect and maintain the front steel plate spring assembly (5001200002) to avoid failure?

Conduct weekly inspections: check for loose U-type bolts and apply lubricant between spring plates. Conduct monthly in-depth inspections: inspect each spring plate for cracks or deformation, clean the assembly, and reapply anti-rust coating if needed. Replace damaged spring plates immediately to prevent further failure.

3

What is the key difference between the internal shaft pin (P1400101AA) and external shaft pin (P2000094AA) of the balance beam?

The internal shaft pin (P1400101AA) is installed inside the balance beam, transmitting torque and bearing internal loads, so it has higher tensile strength and wear resistance. The external shaft pin (P2000094AA) connects the balance beam to the suspension frame, bearing external loads and vibration. They have different dimensions and load-bearing capacities and cannot be mixed.