Parts for Lanzhou LS 3NB500C (107.15.20.00)

1

Left-hand gear

107.15.20.01

Alloy steel (20CrMnTi, carburized, tooth surface hardness HRC 60-64)

1. Tooth wear from continuous meshing; 2. Impact loading during startup; 3. Lubricant deficiency causing tooth scuffing.

1. Maintain gear meshing clearance (0.15-0.20mm); 2. Use extreme pressure lubricant; 3. Inspect for tooth pitting monthly.

2

Right-hand gear

107.15.20.02

Alloy steel (20CrMnTi, carburized, tooth surface hardness HRC 60-64)

1. Abrasive wear from debris intrusion; 2. Fatigue failure from cyclic torque; 3. Misalignment causing uneven tooth load.

1. Clean gear box regularly; 2. Verify coaxiality with crankshaft; 3. Replace if tooth wear exceeds 10% of thickness.

3

Crank shaft

107.15.21.00

High-strength alloy steel (40CrNiMoV, quenched & tempered, tensile strength ≥ 1080MPa)

1. Fatigue cracking from cyclic bending torque; 2. Journal wear due to lubricant contamination; 3. Corrosion from humid environments.

1. Conduct non-destructive testing quarterly; 2. Replace lubricant every 800 working hours; 3. Monitor journal runout (≤ 0.02mm).

4

Connecting rod

107.15.20.12

Alloy steel (40Cr, forged, hardness HRC 28-32)

1. Shear stress from reciprocating load; 2. Bushing friction wear; 3. Fatigue damage at rod end bearings.

1. Inspect rod bend/twist annually; 2. Ensure proper lubrication of rod bearings; 3. Avoid sudden overload during operation.

1

Main bearing

4053156H (230x420x140)

High-carbon chromium bearing steel (GCr15, hardness HRC 61-65, with cage)

1. Lubricant contamination causing abrasive wear; 2. Overheating from insufficient lubrication; 3. Misalignment leading to uneven load.

1. Monitor operating temperature (≤ 80°C); 2. Use clean ISO VG 68 lubricant; 3. Ensure press-fit interference (0.01-0.03mm).

2

Eccentric bearing

Lan 228/600Q (600x730x90)

High-carbon chromium bearing steel (GCr15SiMn, hardness HRC 61-65)

1. Fatigue damage from heavy eccentric load; 2. Debris intrusion causing raceway wear; 3. Corrosion from lubricant additives.

1. Install a high-precision filter; 2. Conduct vibration analysis monthly (≤ 4.5mm/s); 3. Replace if raceway pitting occurs.

3

Left-bearing cage

107.15.20.13

Engineering plastic (PA66+GF30) + steel reinforcement

1. Wear from bearing roller contact; 2. High temperature causing material aging; 3. Impact damage during disassembly.

1. Avoid overheating (≤ 100°C); 2. Disassemble with specialized tools; 3. Replace if cracks or deformation occur.

4

Right-bearing cage

107.15.20.04

Engineering plastic (PA66+GF30) + steel reinforcement

1. Fatigue from cyclic roller impact; 2. Lubricant chemical degradation; 3. Debris scratching.

1. Use compatible lubricant; 2. Clean bearing cavity before installation; 3. Inspect for wear during maintenance.

5

Inner race retainer

107.15.20.07

Carbon steel (Q235B, surface galvanized)

1. Wear from bearing inner race rotation; 2. Corrosion from humid environment; 3. Deformation from uneven pressure.

1. Ensure uniform pressure during installation; 2. Apply anti-rust coating; 3. Replace if deformed.

6

Outer race retainer

107.15.20.06

Carbon steel (Q235B, surface galvanized)

1. Wear from bearing outer race movement; 2. Corrosion from lubricant contamination; 3. Impact damage.

1. Clean before installation; 2. Tighten to specified torque; 3. Inspect for cracks monthly.

7

Retainer

107.15.24.00

Carbon steel (Q235B, surface galvanized)

1. Wear from component contact; 2. Corrosion from on-site environment; 3. Fatigue from vibration.

1. Secure to reduce vibration; 2. Inspect monthly for wear; 3. Apply anti-rust paint annually.

8

Retainex

107.15.20.07

Carbon steel (Q235B, surface galvanized)

1. Wear from bearing race contact; 2. Corrosion; 3. Deformation from over-tightening.

1. Torque to standard values; 2. Check for deformation before use; 3. Replace if wear exceeds 0.3mm.

9

Retainer

107.06.20.04

Carbon steel (Q235B, surface galvanized)

1. Wear from fastener friction; 2. Corrosion; 3. Bending damage during installation.

1. Install gently to avoid bending; 2. Clean surface regularly; 3. Replace if damaged.

10

Spacer

107.15.20.08

Carbon steel (Q235B, precision machined)

1. Wear from bearing end pressure; 2. Deformation from uneven load; 3. Corrosion from lubricant.

1. Ensure precise fit (tolerance ±0.01mm); 2. Replace if deformation occurs; 3. Clean before assembly.

11

Snap ring

107.06.20.42

Spring steel (65Mn, heat-treated, hardness HRC 42-48)

1. Elastic fatigue losing locking function; 2. Corrosion; 3. Bending damage during installation.

1. Avoid over-bending; 2. Check elasticity before use; 3. Replace after 3 disassembly cycles.

1

Gasket

107.15.20.09 (δ0.25)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Compression fatigue from long-term use; 2. High-temperature aging; 3. Oil corrosion leading to brittleness.

1. Do not reuse after disassembly; 2. Ensure uniform compression; 3. Avoid contact with high-temperature components (≥120°C).

2

Gasket

107.15.20.10 (δ0.2)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Vibration-induced edge wear; 2. Moisture softening; 3. Improper storage causing deformation.

1. Store in sealed packaging; 2. Check for deformation before installation; 3. Tighten fasteners evenly.

3

Gasket

107.15.20.11 (δ0.1)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Abrasive wear from debris; 2. Over-tightening causing tearing; 3. Chemical corrosion from lubricant.

1. Clean mating surfaces; 2. Use torque wrench to avoid over-tightening; 3. Replace if damaged.

4

Gasket

107.15.20.17 (δ0.25)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Fatigue from cyclic pressure; 2. High-temperature aging; 3. Corrosion from drilling fluid leakage.

1. Replace every 600 working hours; 2. Inspect for leakage after installation; 3. Avoid contact with corrosive fluids.

5

Gasket

107.15.20.18 (δ0.10)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Wear from component vibration; 2. Deformation from uneven pressure; 3. Aging from long-term storage.

1. Use fresh gaskets for installation; 2. Ensure uniform pressure; 3. Store in a dry environment.

6

Gasket

107.15.20.19 (δ0.05)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Tearing from improper installation; 2. Compression fatigue; 3. Chemical corrosion.

1. Handle gently to avoid tearing; 2. Replace after each disassembly; 3. Use compatible lubricant/fluid.

7

Gasket of end cap

107.15.20.03

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Wear from end cap movement; 2. Corrosion from humid environment; 3. Leakage-induced erosion.

1. Clean end cap surface before installation; 2. Tighten bolts evenly; 3. Replace if leakage occurs.

8

Gasket

—

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Aging from high temperature; 2. Compression deformation; 3. Corrosion from lubricant.

1. Replace every 600 working hours; 2. Avoid over-tightening; 3. Store in sealed packaging.

9

Gasket

107.15.20.14 (δ0.25)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Wear from vibration; 2. Corrosion from drilling fluid; 3. Over-tightening causing damage.

1. Tighten to specified torque; 2. Clean mating surfaces; 3. Replace if wear or damage is found.

10

Gasket

107.15.20.15 (δ0.10)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Compression fatigue; 2. Moisture-induced softening; 3. Debris contamination.

1. Keep assembly area clean; 2. Replace after disassembly; 3. Avoid exposure to moisture.

11

Gasket

107.15.20.16 (δ0.05)

Asbestos-free rubber (NBR + aramid fiber, shore hardness 70±5)

1. Tearing during installation; 2. Chemical corrosion; 3. Aging from long-term use.

1. Handle with care; 2. Use compatible fluids; 3. Replace every 500 working hours.

1

Bolt

107.15.20.05 (M20x55)

Alloy steel (8.8 grade, surface zinc-plated)

1. Thread wear from frequent disassembly; 2. Fatigue fracture from cyclic vibration; 3. Corrosion from humid environment.

1. Torque to 60-65N·m; 2. Apply thread lock adhesive; 3. Inspect threads for damage monthly.

2

Head hole bolt

107.06.60 (M24x65)

Alloy steel (8.8 grade, surface zinc-plated)

1. High-load thread wear; 2. Corrosion from drilling fluid leakage; 3. Over-tightening causing shank deformation.

1. Use torque wrench (85-90N·m); 2. Clean threads after use; 3. Replace if deformation occurs.

3

Head hole bolt

107.06.20.45 (M16x130)

Alloy steel (8.8 grade, surface zinc-plated)

1. Fatigue from long-term vibration; 2. Thread corrosion; 3. Shear stress from part misalignment.

1. Ensure part alignment before tightening; 2. Retighten weekly; 3. Replace if shear cracks appear.

4

Bolt

107.06.20.48 (M20x130)

Alloy steel (8.8 grade, surface zinc-plated)

1. Vibration-induced loosening; 2. Thread wear from nut rotation; 3. Corrosion from lubricant contamination.

1. Use lock nuts; 2. Apply anti-rust lubricant; 3. Check tightness monthly.

5

Bolt

GB5783-86 (M16x60)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear; 2. Corrosion from on-site environment; 3. Fatigue from cyclic load.

1. Torque to 40-45N·m; 2. Pair with compatible washers; 3. Replace if thread damage occurs.

6

Screw

107.06.20.46 (M16x40)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear from frequent use; 2. Corrosion; 3. Over-tightening causing head damage.

1. Use a torque screwdriver (35-40N·m); 2. Clean threads before installation; 3. Replace if head is stripped.

7

Screw

107.06.20.43 (M16x90)

Carbon steel (8.8 grade, surface zinc-plated)

1. Fatigue from vibration; 2. Thread corrosion; 3. Wear from washer friction.

1. Apply thread lock adhesive; 2. Replace washers regularly; 3. Inspect for rust monthly.

8

Nut

GB6178-86 (M20)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear from bolt rotation; 2. Corrosion; 3. Loosening from vibration.

1. Pair with lock washers; 2. Retighten weekly; 3. Replace if thread stripping occurs.

9

Washer

GB97.1-85 (16)

Carbon steel (surface zinc-plated, hardness HRC 20-25)

1. Wear from bolt/nut friction; 2. Corrosion; 3. Deformation from over-tightening.

1. Replace with bolts; 2. Ensure compatibility with bolt size; 3. Do not reuse deformed washers.

10

Washer

GB93-87 (16)

Carbon steel (spring steel, surface zinc-plated, hardness HRC 42-48)

1. Elastic fatigue losing locking function; 2. Corrosion; 3. Wear from nut friction.

1. Check elasticity before use; 2. Replace after 3 disassembly cycles; 3. Apply anti-rust coating.

11

Split pin

GB91-86 (4x40)

Carbon steel (Q235B, surface galvanized)

1. Bending fatigue; 2. Corrosion; 3. Damage during disassembly.

1. Bend properly after installation; 2. Replace after each disassembly; 3. Store in a dry environment.

1

Cap.main bearing end

107.15.23.00

Carbon steel (Q235B, surface anti-rust coating)

1. Impact damage from external debris; 2. Corrosion from humid environment; 3. Deformation from uneven bolt torque.

1. Tighten bolts evenly; 2. Inspect for cracks monthly; 3. Apply anti-rust paint annually.

2

wire

—

Stainless steel (304, diameter ≥ 1.2mm, tensile strength ≥ 520MPa)

1. Fatigue breakage from repeated bending; 2. Corrosion from humid environment; 3. Wear from friction with other components.

1. Avoid excessive bending; 2. Secure to reduce friction; 3. Replace if signs of fatigue appear.

1

What lubricant is suitable for Lanzhou LS 3NB500C main bearings and gears?

Use ISO VG 68 extreme pressure industrial gear oil, compliant with GB/T 3141-2019. It resists high temperature (≤120°C) and heavy load, reduces friction between bearings/gears, and extends component service life by 30%.

2

How often should main bearings and gaskets be replaced for this pump?

Replace main bearings every 2000 working hours or if raceway damage occurs; replace gaskets after each disassembly or every 600 working hours. Harsh drilling environments may require shorter replacement cycles.

3

How to prevent fastener loosening in Lanzhou LS 3NB500C’s power transmission assembly?

Torque fasteners per standard specifications, use lock washers/thread lock adhesive, retighten weekly, and apply anti-rust lubricant. Regularly inspect high-vibration areas to avoid part detachment.