Parts for 3NB500C (107.15.01.00)

1. Introduction & Core Purpose

This guide is exclusively tailored for the 3NB500C mud pump, focusing on components under part number 107.15.01.00 (including frame assemblies, lubrication systems, transmission parts, and sealing components). It caters to two key user groups: procurement teams needing standardized, model-matched part sourcing to avoid mismatch risks, and on-site maintenance/technical personnel requiring actionable guidance for fault diagnosis, component protection, and equipment upkeep. The core purpose is to serve as a dual-reference document—supporting compliant procurement and solving practical technical issues—while ensuring 3NB500C mud pumps maintain stable, efficient operation in demanding industrial scenarios.

2. Product Overview

The parts listed (107.15.01.00 series) are critical original-matching components for 3NB500C mud pumps, covering structural supports (frame, frame assy), power transmission (drive shaft assy, crank shaft assy, intermediate rod), lubrication systems (forced lubrication system, spray lubrication system, spray pump system), sealing elements (gaskets, single lip oil seal, packing box), fasteners (bolts, nuts, washers), and auxiliary parts (dipstick oil lever, oil box, water retainer). All parts comply with industrial standards such as GB (National Standard of China) and JB (Mechanical Industry Standard), ensuring dimensional precision, material compatibility, and long-term durability matching the 3NB500C’s operational demands.

3. Functional Description

3.1 Structural Support Functions

Frame (107.15.91.00-1), frame assy (107.15.90.00, 107.15.01.00), and cover components provide stable load-bearing and installation positioning for the pump’s internal transmission parts. They resist deformation under high vibration and heavy load, ensuring alignment of crank shafts, drive shafts, and crossheads—critical for avoiding component interference and power loss.

3.2 Power Transmission Functions

Drive shaft assy (107.15.10.00), crank shaft assy (107.15.20.00), and intermediate rod (107.15.01.01) form the core power transmission chain, converting rotational power into reciprocating motion for the pump’s working mechanism. Crosshead guide upper (107.15.90.05) and lower (107.15.90.07) ensure smooth, precise movement of crossheads, reducing friction and extending transmission component service life.

3.3 Lubrication & Sealing Functions

Forced lubrication systems, spray lubrication systems (107.15.30.00), and spray pump systems (107.15.101.00) deliver targeted lubrication to rotating and sliding parts (bearings, gears, crossheads), reducing friction and wear. Oil boxes (107.06.38.00), oil tubings (107.15.90.09), and dipstick oil levers (107.15.95.00) manage lubricant storage, delivery, and level monitoring. Gaskets, single lip oil seals (107.15.97.00), and packing boxes (107.15.96.03) prevent lubricant leakage and external impurity intrusion, protecting internal components from corrosion and contamination.

3.4 Fastening & Auxiliary Functions

Bolts (GB5783-86, 107.11.99.00), nuts (GB6170-86), and washers (GB93-87, GB95-85) secure all components, ensuring assembly stability under high vibration. Pins (GB119-86), wires, and water retainers (107.06.39.00) provide auxiliary fixing and protection, preventing part detachment and water ingress that could damage lubrication systems.

4. Structural Features

The 107.15.01.00 series parts adopt a modular structural design, enabling easy disassembly, assembly, and replacement—reducing maintenance downtime. Structural components (frame, frame assy) use high-strength carbon steel or alloy steel,经过 quenching and tempering treatment to enhance rigidity and fatigue resistance, complying with GB/T 3077-2015. Lubrication system parts feature precision-machined internal passages for uniform lubricant distribution, while sealing components use asbestos-free rubber, fluororubber, or high-quality metal materials to adapt to different pressure and temperature conditions. Fasteners adopt surface galvanization or anti-rust coating, improving corrosion resistance in harsh environments.

5. Application Conditions

These parts are specifically designed for 3NB500C mud pumps, widely used in oil & gas drilling, mining exploration, and industrial sludge transportation scenarios. They adapt to extreme working conditions, including ambient temperatures of -20°C to 60°C, operating pressures up to 35MPa, and high-vibration (≤ 4.5mm/s) and dusty environments. The parts maintain stable performance in humid, corrosive (drilling fluid, mine water) settings, meeting the continuous operation requirements of heavy-duty mud pumps in industrial fields.

6. Maintenance Recommendations

6.1 Routine Inspection

Conduct daily inspections of lubricant levels using the dipstick oil lever (107.15.95.00) and check for leakage from gaskets, oil seals, and oil tubings. Inspect fasteners weekly for tightness, retightening if loose (follow torque specifications per GB/T 3098.1-2010). Monthly, inspect frame and crosshead guides for deformation or wear, and check crosshead movement for smoothness.

6.2 Regular Replacement

Replace lubricants every 800 working hours, cleaning the oil box and lubrication passages to avoid contamination. Replace gaskets after each disassembly or every 600 working hours; replace single lip oil seals (107.15.97.00) and packing boxes (107.15.96.03) every 1200 working hours or if leakage occurs. Replace fasteners every 2000 working hours or if thread damage, corrosion, or fatigue is detected.

6.3 Storage & Handling

Store parts in a dry, well-ventilated warehouse, avoiding direct sunlight and humid environments. Sealing components should be stored in sealed packaging to prevent aging. When handling heavy parts (frame assy, crank shaft assy), use specialized lifting equipment to avoid impact damage. Before installation, clean all parts to remove debris and rust, ensuring precise fit.

7. On-Site Fault Repair Cases

Case 1: Lubricant Leakage Caused by Gasket Aging

Fault Phenomenon: 3NB500C pump showed continuous lubricant leakage from the oil box (107.06.38.00), with lubricant levels dropping rapidly. Diagnosis: Disassembled and found gasket 107.06.90.15 (δ5) aging and brittle, losing sealing performance (exceeding service life of 600 working hours). Repair: Replaced the gasket with a new original-matched part, cleaned the oil box sealing surface, and tightened bolts per torque standard (45-50N·m). Result: Leakage stopped, lubricant level stabilized, and pump operated normally.

Case 2: Power Transmission Jamming Due to Crosshead Guide Wear

Fault Phenomenon: Pump experienced abnormal noise, increased vibration, and difficulty in starting, with the drive shaft assy (107.15.10.00) failing to rotate smoothly. Diagnosis: Inspected and found crosshead guide lower (107.15.90.07) severely worn (wear depth ≥ 0.8mm), causing crosshead jamming. Repair: Replaced the crosshead guide, adjusted crosshead clearance (0.15-0.20mm), and added lubricant to the guide surface. Result: Jamming resolved, vibration and noise reduced to normal levels, and power transmission restored.

Case 3: Fastener Loosening Causing Frame Assy Vibration

Fault Phenomenon: Frame assy (107.15.90.00) showed severe vibration during operation, with bolts becoming loose repeatedly.Diagnosis: Found bolts GB5783-86 (M16x45) and washers GB93-87 (16) failing to provide reliable locking, with washer elastic fatigue. Repair: Replaced bolts and washers, applied thread lock adhesive, and tightened evenly per torque standard (60-65N·m). Result: Frame assy vibration eliminated, fasteners remained tight, and pump operation stabilized.

Case 4: Oil Seal Damage Leading to Lubricant Contamination

Fault Phenomenon: Lubricant turned turbid, with metal particles detected, causing increased wear on the crank shaft assy (107.15.20.00).Diagnosis: Discovered single lip oil seal (107.15.97.00) damaged, allowing external dust and metal debris to enter the lubrication system. Repair: Replaced the oil seal, drained contaminated lubricant, cleaned the lubrication system, and refilled with new ISO VG 68 extreme pressure lubricant. Result: Lubricant clarity restored, crank shaft wear stopped, and component service life extended.

8. FAQ

9. Procurement Reference & Call to Action

9.1 Procurement Reference Standards

When purchasing 107.15.01.00 series parts for 3NB500C mud pumps, strictly follow original part numbers and specifications to ensure compatibility. Prioritize parts complying with GB, JB, and other national/industrial standards, with formal quality inspection certificates. Verify material compliance (e.g., high-strength steel for structural parts, oil-resistant rubber for seals) and dimensional precision to avoid mismatch that could damage equipment or cause operational failures.

9.2 Call to Action

We supply full-series original-matched, high-quality parts for 3NB500C mud pumps (107.15.01.00 series), covering all components listed. We provide professional technical support for procurement selection, fault diagnosis, and maintenance guidance, tailored to your on-site operational needs. Contact us now for detailed quotes and customized sourcing solutions to keep your 3NB500C mud pumps running stably and efficiently.

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Emeil: [email protected]   whatsapp: +86 15275658619

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