Parts for Lanzhou LS Mud Pump 3NB500C

1

Drive shaft assy

107.15.10.00

High-strength alloy steel (quenched & tempered)

1. High torque impact during startup; 2. Lack of lubrication leading to bearing wear; 3. Misalignment causing uneven stress.

1. Check coaxiality before installation; 2. Maintain lubrication as per GB/T 3811-2008; 3. Avoid sudden overload startup.

2

Crank shaft assy

107.15.20.00

High-strength alloy steel (carburized)

1. Cyclic load leading to fatigue cracking; 2. Lubricant contamination causing journal wear; 3. Impurities entering bearing positions.

1. Regularly inspect lubricant cleanliness; 2. Conduct non-destructive testing every 1500 working hours; 3. Replace worn bearings promptly.

1

Frame assemble

107.15.600.00

Gray cast iron (HT250)

1. Uneven installation stress leading to deformation; 2. Long-term vibration causing bolt loosening and structural damage; 3. Corrosion from drilling fluid leakage.

1. Level installation per equipment manual; 2. Regularly re-tighten fixed bolts; 3. Clean surface to prevent drilling fluid corrosion.

2

Frame

107.15.91.00-1

Gray cast iron (HT250)

1. Fatigue damage from long-term heavy load; 2. Impact from external collision during transportation/installation; 3. Rust caused by humid environment.

1. Avoid collision during handling; 2. Apply anti-rust paint to exposed surfaces; 3. Inspect for cracks quarterly.

3

Plate

107.11.90.27

Carbon steel (Q235A)

1. Wear from friction with adjacent components; 2. Corrosion from lubricant or drilling fluid; 3. Over-tightening bolts causing deformation.

1. Ensure proper bolt torque during installation; 2. Apply anti-corrosion coating; 3. Check friction surfaces regularly for wear.

1

Forced lubrication system

—

Steel (pipeline) + aluminum alloy (pump body)

1. Oil contamination causing valve blockage; 2. Pipeline leakage leading to insufficient oil supply; 3. Pump core wear from long-term operation.

1. Replace lubricating oil per 500 working hours; 2. Clean oil filter regularly; 3. Inspect pipelines for leakage weekly.

2

Spray lubrication system

107.15.30.00

Steel (pipeline) + plastic (nozzle)

1. Nozzle clogging from oil impurities; 2. Pipeline aging leading to oil leakage; 3. Pressure instability causing uneven lubrication.

1. Clean nozzles monthly; 2. Check system pressure regularly; 3. Replace aging pipelines promptly.

3

Dipstick oil lever

107.15.95.00

Stainless steel (304)

1. Wear from frequent insertion/extraction; 2. Corrosion from oil additives; 3. Bending due to improper operation.

1. Operate gently when checking oil level; 2. Wipe clean after each use; 3. Replace if scale affects reading.

4

Oil box

107.06.38.00

Steel (galvanized)

1. Corrosion from moisture in oil; 2. Welding seam leakage from vibration; 3. Internal scaling affecting oil quality.

1. Keep oil box sealed to prevent moisture; 2. Clean internal scaling annually; 3. Inspect welding seams for cracks.

5

Oil tubing

107.15.90.09 (Ø20*1)

Seamless steel tube (20#)

1. Wear from vibration friction; 2. Blockage from oil impurities; 3. Damage from external pressure.

1. Secure tubing to avoid vibration; 2. Flush tubing when replacing oil; 3. Avoid heavy pressure on tubing.

1

Cover

107.15.93.00

Carbon steel (Q235A)

1. Deformation from uneven bolt torque; 2. Corrosion from external environment; 3. Wear from internal component friction.

1. Tighten bolts evenly per torque standard; 2. Clean and paint surface regularly; 3. Check for internal wear during disassembly.

2

Windows cover

107.04.90.07

Carbon steel + transparent plastic

1. Plastic aging from sunlight/heat; 2. Impact damage from external debris; 3. Sealing ring wear causing leakage.

1. Avoid direct sunlight; 2. Protect from debris impact; 3. Replace sealing ring when installing.

3

Rubber washer

D3-4-67 (62*75)

Nitrile rubber (NBR)

1. Aging from high temperature/oil; 2. Compression deformation from over-tightening; 3. Damage from sharp edges.

1. Replace every 300 working hours; 2. Ensure proper compression during installation; 3. Avoid contact with sharp components.

4

Rubber washer

D3-4-67 (22*32)

Nitrile rubber (NBR)

1. Oil swelling leading to loss of elasticity; 2. Wear from vibration; 3. Improper installation causing misalignment.

1. Store in dry, cool place; 2. Check alignment before installation; 3. Replace if swollen or cracked.

5

Gasket

107.15.90.03 (5(40x320))

Asbestos-free rubber

1. High temperature aging; 2. Pressure damage from over-tightening; 3. Oil corrosion leading to brittleness.

1. Do not over-tighten bolts; 2. Replace after disassembly; 3. Avoid contact with high-temperature components.

6

Gasket

107.15.90.02 (40x320)

Asbestos-free rubber

1. Vibration causing edge wear; 2. Moisture leading to softening; 3. Improper storage causing deformation.

1. Store in sealed packaging; 2. Check for deformation before installation; 3. Ensure mating surfaces are clean.

7

Gasket

107.15.90.01 (40x320)

Asbestos-free rubber

1. Chemical corrosion from drilling fluid; 2. Compression fatigue from long-term use; 3. Installation misalignment causing leakage.

1. Clean mating surfaces before installation; 2. Replace every 600 working hours; 3. Avoid contact with drilling fluid.

8

Gasket

107.04.90.06

Asbestos-free rubber

1. High-pressure oil causing extrusion damage; 2. Aging from long-term use; 3. Sharp edges scratching the surface.

1. Inspect mating surfaces for sharp edges; 2. Replace if oil leakage occurs; 3. Ensure proper installation position.

1

Plug

JB1000-77 (M60x2)

Carbon steel (Q235A)

1. Thread wear from frequent disassembly; 2. Corrosion from external environment; 3. Over-tightening causing thread damage.

1. Use proper tools for disassembly; 2. Apply thread sealant during installation; 3. Inspect threads for damage before use.

2

Nut

GB6170-86 (M16)

Carbon steel (8.8 grade)

1. Thread wear from vibration; 2. Corrosion leading to seizing; 3. Fatigue failure from long-term load.

1. Use lock washers to prevent loosening; 2. Regularly re-tighten; 3. Replace if threads are stripped.

3

Bolt

107.11.99.00 (M16)

Alloy steel (8.8 grade)

1. Fatigue fracture from cyclic load; 2. Thread corrosion; 3. Over-tightening causing shank deformation.

1. Torque to standard values; 2. Inspect for cracks regularly; 3. Replace after one fatigue cycle.

4

Bolt

GB5783-86 (M12*25)

Carbon steel (8.8 grade)

1. Vibration causing loosening and wear; 2. Corrosion from humid environment; 3. Improper torque leading to damage.

1. Apply anti-rust coating; 2. Use torque wrench for installation; 3. Check tightness weekly.

5

Washer

GB93-87 (12)

Carbon steel (spring steel)

1. Elastic fatigue leading to loss of locking function; 2. Corrosion causing breakage; 3. Deformation from over-tightening.

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

6

Pipe

107.15.90.13 (Ø25*2.5 L=30)

Seamless steel tube (20#)

1. Wear from vibration friction; 2. Corrosion from fluid; 3. Bending from improper installation.

1. Install with proper support; 2. Flush regularly if conveying corrosive fluid; 3. Avoid bending during installation.

1

Can I replace GB6170-86 (M16) nuts with non-standard nuts?

No. Non-standard nuts do not comply with GB6170-86, leading to poor fit and easy loosening under vibration, which may damage pump components. Use only standard nuts matching the bolt specification.

2

How often should the nitrile rubber washers (D3-4-67) be replaced?

It is recommended to replace them every 300 working hours. In high-temperature or high-oil-pollution environments, shorten the replacement cycle to 200 working hours to avoid leakage caused by aging or wear.

3

What causes crankshaft assembly (107.15.20.00) fatigue cracking, and how to prevent it?

Main cause is long-term cyclic load and lubricant contamination. Prevent by replacing lubricant regularly, conducting non-destructive testing every 1500 working hours, and avoiding sudden overload startup.