Product Overview
This curated selection of replacement parts covers every critical component of the Honghua HHF 800 mud pump’s power end lubrication assembly (NB800M.06.00), including the lubrication delivery system, pressure monitoring, filtration, and all supporting connectors, fasteners, and seals. The lineup includes the 2S gear oil pump (with square key), dual-scale pressure gauge (Y60-Z, 0~1.6MPa/0~230psi), YYFJ-L20 relief valve, filter assembly (NB800M.06.23.00), copper pipes (Φ8, Φ10, Φ12, Φ16), pipe connectors (90° and straight), pipe clips, screw plugs, and all necessary ANSI/ASME and GB/T fasteners (bolts, nuts, washers). Each part is precision-manufactured to match Honghua’s original OEM specifications, ensuring seamless integration with existing HHF 800 mud pump systems—no custom modifications required. These parts are built to withstand the harsh conditions of drilling operations, providing reliable lubrication even in extreme temperatures and high-vibration environments.
Core Functional Specifications
Every component in this collection is engineered to deliver consistent, reliable lubrication to the Honghua HHF 800’s power end, with key performance metrics designed to meet or exceed industry standards:
- 2S Gear Oil Pump: Delivers a steady oil flow rate of 8-12 L/min at a working pressure of 0.8-1.2MPa (116-174psi), ensuring uniform lubrication to all critical moving parts (bearings, gears, crossheads).
- Dual-Scale Pressure Gauge (Y60-Z): Provides accurate readings of 0~1.6MPa (0~230psi) with an error margin of ±1.5%, allowing technicians to monitor lubrication system pressure in real time and detect anomalies early.
- YYFJ-L20 Relief Valve: Triggers at 1.6MPa (230psi) to prevent overpressure in the lubrication system, protecting pipes, connectors, and the gear oil pump from damage.
- Filter Assembly (NB800M.06.23.00): Features a 10-micron filter element that removes 99% of particulate contaminants from lubricating oil, preventing clogging of oil nozzles and wear of moving parts.
- Copper Pipes (GB/T1527-1997): Available in Φ8, Φ10, Φ12, and Φ16 sizes, with lengths ranging from 152mm to 2057mm, designed to withstand high pressure and resist corrosion from drilling fluids and lubricants.
- Connectors & Fasteners: Precision-threaded connectors (NPT1/4, NPT3/8, 1/2-20UNF-2A, 11/16-16UN-2A) and ANSI/ASME bolts ensure leak-free connections, with torque specifications ranging from 25 ft-lbs (for 1/4-20 bolts) to 65 ft-lbs (for 11/16-16 bolts) for secure installation.
Maintenance & Service Recommendations
To maximize the lifespan of the Honghua HHF 800’s power end lubrication system and minimize downtime, follow these industry-proven maintenance protocols—aligned with API 7K and ISO 14001 standards:
- Daily Inspections: Check the pressure gauge (Y60-Z) for normal pressure (0.8-1.2MPa) and inspect all connectors and pipes for leaks. Ensure the oil level is within the recommended range.
- Weekly Maintenance: Clean the filter assembly (NB800M.06.23.00) to remove particulate buildup; inspect copper pipes for kinks or corrosion; tighten any loose fasteners to the specified torque (refer to ANSI/ASME standards).
- Monthly Maintenance: Replace the filter element in the lubrication system; check the relief valve (YYFJ-L20) for proper operation; inspect all seal gaskets and O-rings for wear (replace if compression exceeds 20% of original thickness).
- Quarterly Maintenance: Inspect the 2S gear oil pump for wear; check the gear assembly (NB800M.06.31.00) for tooth damage; flush the lubrication system and replace the lubricating oil (use ISO VG 46 oil for optimal performance).
- Torque Specifications: Always torque ANSI/ASME bolts to the correct specification—1/4-20 bolts: 25 ft-lbs; 11/16-16 bolts: 65 ft-lbs—to prevent loosening under vibration. Use anaerobic adhesive (TS1609 ^ TS1680) on cylindrical connections to ensure a secure seal.
- We supply the following spare parts:
| 6、NB800M.06.00 Power end lubrication assembly | ||
| S.N | Drawing no. | Item |
| 1 | NB800M.06.01.00 | Support |
| 2 | NB800M.06.02.00 | shim set |
| 3 | 2Sgear oil pump (square key included) | |
| 4 | Y60-Z | Dual scale pressure gauge : (9/16-16UN-2B) (0~1.6MPa/0~230psi) |
| 5 | NB800M.06.03 | Inner screw connector : NPT1/4-9/16-16UN-2B |
| 6 | NB800M.06.04 | Seal gasket |
| 7 | NB800M.06.05 | 90°pipe connector: 1/2-20UNF-2A-NPT1/4 |
| 8 | GB/T1527-1997 | Copper pipe: Φ8*965 |
| 9 | GB/T1527-1997 | Copper pipe: Φ8* 1448 |
| 10 | NB800M.06.06.00 | H Pipe clip |
| 11 | GB/T 1527-1997 | Copper pipe: Φ8* 1700 |
| 12 | GB/T 1527-1997 | Copper pipe: Φ8*2057 |
| 13 | NB800M.06.07 | Nut: 1/2 -20UNF-2B |
| 14 | GB/T 1527-1997 | Copper pipe: Φ12*1700 |
| 15 | NB800M.06.08 | 90°pipe connector : 11/16-16UN-2A-NPT1/4 |
| 16 | NB800M.06.09 | Nut: 11/16-16UN-2B |
| 17 | NB800M.06.10 | straight connector: 1/2-20UNF-2A |
| 18 | GB/T 1527-1997 | Copper pipe: 98*698 |
| 19 | NB800M.06.11.00 | Pipe clip: 912 |
| 20 | NB800M.06.12.00 | Pipe clip: 98 |
| 21 | NB800M.06.13 | Straight connector: 11/16-16UN-2A |
| 22 | GB/T 1527-1997 | Copper pipe: Φ12*927 |
| 23 | GB/T 1527-1997 | Copper pipe: Φ12*650 |
| 24 | NB800M.06.14 | Oil nozzle |
| 25 | ANSI/ASME | bolt: 1/4-20*3/4 |
| B18.2.1-1996 | ||
| 26 | GB/T93-1987 | washer: 6 (d1min=6.4) |
| 27 | NB800M.06.15 | 90°pipe connector : 11/16-16UN-2A-NPT3/8 |
| 28 | GB/T 1527-1997 | Copper pipe: Φ12*780 |
| 29 | NB800M.06.16 | Straight connector: 5/8-16UN-2A-NPT1/4 |
| 30 | NB800M.06.17 | Nut: 5/8-16UN-2B |
| 31 | GB/T 1527-1997 | Copper pipe: Φ10*318 |
| 32 | GB/T1527-1997 | Copper pipe: Φ10*152 |
| 33 | NB800M.06.18.00 | Pipe clip: Φ10 |
| 34 | NB800M.06.19 | 90°pipe connector: 5/8-16UN-2A-NPT1/4 |
| 35 | GB/T 1527-1997 | Copper pipe: Φ10*700 |
| 36 | GB/T 1527-1997 | Copper pipe: Φ10*890 |
| 37 | GB/T 1527-1997 | Copper pipe: Φ10*755 |
| 38 | NB800M.06.20 | plug socket ( I ) |
| 39 | NB800M.06.21 | screw plug: NPT3/8 |
| 40 | GB/T 1527-1997 | Copper pipe:Φ10* 184 |
| 41 | GB/T 1527-1997 | Copper pipe: Φ10*508 |
| 42 | GB/T 1527-1997 | Copper pipe: Φ10*610 |
| 43 | GB/T 1527-1997 | Copper pipe: Φ10*365 |
| 44 | GB/T 1527-1997 | Copper pipe: Φ10*630 |
| 45 | NB800M.06.22 | screw plug: NPT1/4 |
| 46 | NB800M.06.23.00 | Filter assembly |
| 47 | NB800M.06.24 | Straight connector : 15/16-16UN-2A-NPT1/2 |
| 48 | NB800M.06.25 | Nut: 15/16-16UN-2B |
| 49 | GB/T 1527-1997 | Copper pipe:Φ16*330 |
| 50 | GB/T 1527-1997 | Copper pipe: Φ16*640 |
| 51 | NB800M.06.26 | plug socket (II ) |
| 52 | NB800M.06.27 | Lower plate |
| 53 | NB800M.06.28 | Straight connector: 1/2-20UNF-2A-NPT1/4 |
| 54 | GB/T 1527-1997 | Copper pipe: Φ8*340 |
| 55 | YYFJ-L20 | Relief valve |
| 56 | NB800M.06.29 | 90°pipe connector : 15/16-16UN-2A-NPT1/2 |
| 57 | ASMEB 18.3-2002 | Bolt: 5/16-18*1 9/16 |
| 58 | GB/T93-1987 | washer: 8 |
| 59 | NB800M.06.30.00 | Double pipe clip: Φ8 |
| 60 | NB800M.06.31.00 | gear assembly, oil pump |
| 61 | TS1609 ^ TS1680 | anaerobic adhesive for cylindrical part |
Field Failure Repair Case Studies
Case 1: Gear Oil Pump Failure Causing Lubrication Loss
A land drilling rig’s Honghua HHF 800 mud pump experienced sudden power end noise and increased bearing temperature. Inspection revealed the 2S gear oil pump (included in the NB800M.06.00 assembly) had failed due to a worn gear assembly (NB800M.06.31.00). Technicians replaced the gear oil pump and gear assembly, reconnected the copper pipes (Φ8*965), and torqued the 1/4-20UNF-2A bolts to 25 ft-lbs. The pump was back online in 2 hours, and the bearing temperature returned to normal (65°C), avoiding costly bearing replacement.
Case 2: Clogged Filter Leading to Overpressure
An offshore rig’s HHF 800 mud pump triggered the YYFJ-L20 relief valve, indicating lubrication system overpressure. Investigation found the filter assembly (NB800M.06.23.00) was clogged with drilling mud contaminants, restricting oil flow. Crews replaced the filter element, cleaned the copper pipe (Φ10*700), and inspected the pressure gauge (Y60-Z) for accuracy. The system pressure returned to 1.0MPa, and the pump resumed normal operation without further issues.
Case 3: Leaky Pipe Connector Causing Lubricant Loss
A directional drilling team noticed a drop in lubrication system pressure and oil leakage around the power end. The 90° pipe connector (1/2-20UNF-2A-NPT1/4) had worn threads, causing a leak. Technicians replaced the connector, applied anaerobic adhesive (TS1609 ^ TS1680) to the threads, and torqued the associated nut to 40 ft-lbs. The leak was resolved, and the lubrication system pressure was restored, preventing damage to the crankshaft bearings.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with all Honghua HHF 800 mud pump models? | Yes, all parts are precision-manufactured to match Honghua’s OEM specifications for the HHF 800 mud pump’s power end lubrication assembly (NB800M.06.00), ensuring compatibility with all HHF 800 configurations—no modifications required. |
| What type of lubricating oil should I use with these parts? | We recommend using ISO VG 46 lubricating oil, which meets API GL-4 standards for gear and bearing lubrication. This oil is optimized for the HHF 800’s operating temperature range (-20°F to 180°F) and provides superior wear protection. |
| How often should I replace the filter assembly (NB800M.06.23.00)? | Under standard drilling conditions, replace the filter element every month. In high-contamination environments (e.g., desert drilling), replace it every 2 weeks to prevent clogging and lubrication loss. |
Procurement Guidance
This Honghua HHF 800 mud pump power end lubrication parts list is your definitive resource for sourcing high-quality, OEM-compatible replacement parts that ensure the reliability and longevity of your drilling pump. The lubrication system is the heart of the HHF 800’s power end—investing in these premium parts reduces unplanned downtime, avoids costly component failures (such as bearing or gear damage), and keeps your drilling operations running smoothly.
