3NB500C Mud Pump Lubrication System Parts

1

107.15.30.00

Lubrication system (main assembly)

1. System-wide leakage from aged seals/gaskets; 2. Oil contamination leading to component wear; 3. Channel clogging from debris affecting oil circulation.

1. Inspect for oil leaks weekly and replace seals/gaskets promptly; 2. Change lubricating oil every 500 working hours; 3. Clean oil channels annually to remove sludge buildup.

Integrated assembly with Q355B steel frames; precision-machined oil channels; compatible with ISO VG 46 industrial gear oil; meets API 7K lubrication system standards.

2

107.15.31.00

Left oil channel

1. Internal clogging from oil sludge and debris; 2. Corrosion from moisture-contaminated oil; 3. Wear at connection points from vibration.

1. Flush with compatible cleaning solvent during oil changes; 2. Use water-resistant lubricating oil to prevent internal corrosion; 3. Inspect connection tightness monthly.

27SiMn alloy steel; internal surface polished for smooth oil flow; zinc-nickel plating for anti-corrosion; precision-machined to fit 3NB500C pump housing.

3

107.15.33.00

Right oil channel

1. Abrasive wear from contaminated oil particles; 2. Fatigue cracking from pump vibration; 3. Leakage at joint connections from improper installation.

1. Install with compatible gaskets to ensure sealing; 2. Filter lubricating oil before refilling to remove particles; 3. Check for cracks during routine maintenance.

Same as left oil channel: 27SiMn alloy steel with anti-corrosion plating; designed for symmetric oil distribution in 3NB500C lubrication system.

4

107.15.34.00

Oil tank for gear (right)

1. Corrosion from long-term oil storage and moisture; 2. Weld fatigue from pump vibration; 3. Oil leakage at tank seams.

1. Drain and clean tank every 1000 working hours; 2. Inspect welds for cracks semi-annually; 3. Keep tank filled to recommended level to reduce internal condensation.

Q235B carbon steel; welded construction with anti-corrosion interior coating; capacity tailored for 3NB500C gear lubrication needs.

5

107.15.36.00

Oil tank for gear (left)

1. Sludge buildup leading to internal wear; 2. External corrosion from drilling fluid exposure; 3. Seal degradation at tank openings.

1. Remove sludge during routine cleaning; 2. Apply external anti-corrosion paint annually; 3. Replace tank seals when refilling oil.

Q235B carbon steel with internal anti-rust coating and external epoxy paint; symmetric design matching right oil tank; compatible with 3NB500C pump layout.

6

107.15.35.00

Oil trap

1. Clogging from oil contaminants and sludge; 2. Wear of filtering elements; 3. Corrosion from moisture in lubricant.

1. Clean filtering elements every 200 working hours; 2. Replace elements if flow resistance exceeds 0.3MPa; 3. Use dehydrating lubricating oil to reduce moisture buildup.

Aluminum alloy housing; stainless steel (304) filtering mesh; precision-designed to separate contaminants from lubricant; meets GB/T 5748 oil trap standards.

1

107.15.30.01

Oil pipe (Ø16x1.5 L=220)

1. Abrasion from contact with other pump components; 2. Fatigue cracking from pump vibration; 3. Corrosion from external drilling fluids.

1. Secure pipes with brackets to avoid contact friction; 2. Inspect for cracks and bulges weekly; 3. Replace if wall thickness decreases by more than 0.2mm.

Cold-drawn seamless steel pipe (20# steel); outer diameter 16mm, wall thickness 1.5mm, length 220mm; galvanized surface for anti-corrosion.

2

107.15.30.02

Oil pipe (Ø16x1.5 L=640)

1. Bending fatigue from improper routing; 2. Leakage at connection points; 3. Internal corrosion from contaminated oil.

1. Route pipes with minimal bending to avoid stress; 2. Use proper gaskets at connections; 3. Flush pipes during oil changes to remove internal debris.

20# seamless steel; same diameter/wall thickness as 107.15.30.01; length 640mm; precision-cut ends for tight connections.

3

F3-42-80

Joint body (16-1/2")

1. Thread wear from repeated assembly/disassembly; 2. Leakage from damaged sealing surfaces; 3. Corrosion from oil and drilling fluid exposure.

1. Use thread sealant compatible with lubricating oil; 2. Avoid over-tightening to prevent thread damage; 3. Inspect sealing surfaces for scratches before installation.

Carbon steel (WCB) with nickel plating; 16-1/2" thread size; precision-machined sealing surfaces; rated for 10MPa operating pressure.

4

F3-41-93

Joint body (16-1/2")

1. Vibration-induced thread loosening; 2. Abrasive wear from contaminated oil; 3. Deformation from uneven torque during installation.

1. Retighten after 100 working hours; 2. Filter oil to reduce abrasive particles; 3. Use a torque wrench to apply uniform torque (45-50 N·m).

WCB carbon steel with anti-corrosion plating; 16-1/2" tapered threads; designed for high-vibration environments; compatible with 3NB500C oil pipes.

5

GB5646-85

Pipe liner (16)

1. Internal wear from high-velocity oil flow; 2. Corrosion from contaminated lubricant; 3. Damage from improper installation (forceful insertion).

1. Insert gently to avoid deformation; 2. Replace if internal surface roughness exceeds 0.8μm; 3. Match with 16mm diameter oil pipes.

304 stainless steel; inner diameter 16mm; polished internal surface to reduce oil flow resistance; complies with GB5646-85 standards.

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107.15.30.03

Socket (φ10x1 L=10)

1. Wear from repeated component insertion/removal; 2. Corrosion from oil and moisture; 3. Deformation from excessive force.

1. Avoid forceful insertion of components; 2. Clean and lubricate socket interior during maintenance; 3. Replace if fit becomes loose.

Brass (H62); inner diameter 10mm, wall thickness 1mm, length 10mm; precision-machined for tight component fit.

7

107.15.30.04

Socket (Ø10x1 L=10)

1. Wear at contact points; 2. Oxidation from outdoor exposure; 3. Damage from mismatched component insertion.

1. Ensure components match socket size before insertion; 2. Store in a dry environment when not in use; 3. Inspect for wear monthly.

H62 brass; same dimensions as 107.15.30.03 (10x1x10mm); polished contact surfaces for reduced wear.

1

GB32.1-88

Head hole bolt (M12x35)

1. Thread wear from repeated assembly; 2. Fatigue fracture from pump vibration; 3. Corrosion from drilling fluids and moisture.

1. Tighten to 35-40 N·m torque; 2. Apply anti-corrosion grease to threads; 3. Replace after 3-5 disassembly cycles.

8.8-grade carbon steel; zinc plating; M12x35 thread size; complies with GB32.1-88; designed for securing oil channels and tanks.

2

GB5733-86

Bolt (M12x35)

1. Over-tightening-induced thread deformation; 2. Vibration loosening; 3. Chemical corrosion from oil additives.

1. Use a torque wrench to avoid overloading; 2. Pair with GB6170-86 (M12) nuts; 3. Inspect threads for damage before reuse.

8.8-grade alloy steel; galvanized; M12x35 precision-rolled threads; meets GB5733-86; ideal for heavy-component fastening.

3

GB6170-86

Nut (M12)

1. Thread wear from bolt friction; 2. Vibration-induced loosening; 3. Corrosion from external contaminants.

1. Replace if thread pitch is damaged; 2. Use lock washers for high-vibration connections; 3. Clean threads before installation.

8-grade carbon steel; zinc plating; M12 internal threads; complies with GB6170-86; compatible with M12 bolts in the system.

4

GB5647-85

Nut (16)

1. Wear from pipe liner movement; 2. Over-tightening deformation; 3. Moisture corrosion.

1. Tighten to 25-30 N·m torque; 2. Pair exclusively with GB5646-85 (16) pipe liners; 3. Replace if internal threads are stripped.

Carbon steel (Q235A); zinc plating; 16mm internal diameter; complies with GB5647-85; designed for pipe liner fastening.

5

GB6170-86

Nut (M6)

1. Cross-threading damage during installation; 2. Vibration loosening; 3. Wear from small-component movement.

1. Align threads manually before tightening; 2. Use a small torque wrench (8-10 N·m); 3. Replace after 5+ uses.

6-grade carbon steel; zinc plating; M6 internal threads; complies with GB6170-86; for securing small auxiliary components.

6

GB91-86

Cotter pin (2x12)

1. Bending fatigue from repeated vibration; 2. Rust from moisture; 3. Wear at contact points.

1. Replace after each disassembly; 2. Avoid over-bending during installation; 3. Apply anti-rust spray for outdoor storage.

65Mn spring steel; diameter 2mm, length 12mm; quenched for elasticity; complies with GB91-86; used for locking fasteners.

7

107.04.30.04

Plug

1. Thread wear from repeated removal; 2. Leakage-induced corrosion; 3. Damage from improper tools.

1. Use socket wrenches to avoid cross-threading; 2. Apply thread sealant during installation; 3. Inspect for leaks after oil refilling.

Brass (H62); precision-tapped threads; polished sealing surface; compatible with 3NB500C oil tank and channel openings.

8

107.04.30.05

Gasket

1. Compression set from long-term use; 2. Damage from debris on mating surfaces; 3. Chemical degradation from oil additives.

1. Replace every time components are disassembled; 2. Clean mating surfaces before installation; 3. Avoid over-compression.

Non-asbestos fiber reinforced with nitrile rubber; heat-resistant up to 120°C; compatible with industrial gear oil; ensures leak-tight sealing.

9

107.04.30.06-1

Magnetic block

1. Loss of magnetism from high temperatures; 2. Clogging from ferrous contaminants; 3. Corrosion from oil and moisture.

1. Keep away from high-temperature components (above 150°C); 2. Clean ferrous debris monthly; 3. Replace if magnetism decreases by 30%.

Neodymium-iron-boron (NdFeB) magnet; stainless steel (304) coating; rated for -40°C to 120°C; captures ferrous particles in lubricant.

10

107.04.30.08

Rod

1. Bending from improper handling; 2. Wear from component friction; 3. Corrosion from drilling fluids.

1. Handle carefully to avoid bending; 2. Lubricate contact surfaces regularly; 3. Inspect for straightness (replace if deviation >0.1mm).

40Cr alloy steel; heat-treated for rigidity; zinc plating for anti-corrosion; precision-machined to fit 3NB500C auxiliary components.

11

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Wire (Ø1.6 L=2000)

1. Fatigue from repeated bending; 2. Abrasion from contact with sharp edges; 3. Rust from outdoor exposure.

1. Avoid sharp bends during installation; 2. Secure to prevent contact with moving components; 3. Replace if fraying is detected.

Galvanized low-carbon steel; diameter 1.6mm, length 2000mm; tensile strength ≥450MPa; used for securing lubrication system components.

12

107.15.32.00

Oil retainer groover

1. Wear from rotating component friction; 2. Corrosion from lubricant and moisture; 3. Damage from improper installation.

1. Ensure proper alignment with rotating components; 2. Lubricate regularly to reduce friction; 3. Inspect for wear grooves (replace if depth >0.5mm).

Cast iron (HT200) with wear-resistant coating; precision-machined groove for oil retention; designed to keep lubricant on rotating parts.

What lubricating oil is compatible with the 3NB500C lubrication system?

Use ISO VG 46 industrial gear oil, compliant with API GL-4 standards. Avoid mixing different oil brands; ensure oil is water-resistant and contains anti-wear additives to protect gears and bearings. Change oil every 500 working hours for optimal performance.

How to troubleshoot lubrication system pressure loss in 3NB500C pumps?

Check for oil leaks at joints/pipes first, then inspect for clogged oil channels or oil trap. Verify fastener tightness and replace worn gaskets/seals. If pressure remains low, check for pump vibration-induced pipe damage or worn joint bodies, and repair/replace as needed per GB standards.

How often should key lubrication system parts be inspected/replaced?

Gaskets/seals: Replace every 12 months or during oil changes; Magnetic block: Inspect monthly, replace if magnetism fades; Oil trap: Clean every 200 hours, replace filter elements annually; Oil channels: Flush annually; Fasteners: Inspect monthly for tightness.