HHF-800 Drilling Pump Pinion Shaft Assembly (NB800M.03.00) Parts

1

NB800M.03.01

Key：1 3/4×1 3/4×8

Alloy steel (AISI 1045), heat-treated for tensile strength and wear resistance, precision-machined for tight keyway fit

1. Shear failure from torque overload; 2. Wear at key-keyway interface from vibration; 3. Corrosion from lubricant moisture.

1. Ensure keyway and key are free of debris before installation; 2. Avoid exceeding rated torque limits; 3. Apply anti-corrosion grease to key surfaces.

2

NB800M.03.02

Pinion shaft

Nickel-chromium-molybdenum alloy (AISI 4340), heat-treated (HRC 58-62) for fatigue resistance, precision-ground gear teeth and journals

1. Gear tooth wear from misalignment with bull gear; 2. Journal scoring from contaminated lubricant; 3. Fatigue cracking from cyclic torque.

1. Align with bull gear per API Spec 7K Clause 5.4; 2. Use ISO VG 460 lubricant with anti-wear additives; 3. Inspect gear teeth for pitting every 500 hours.

3

NB800M.03.02A

Pinion shaft（hobbing）

Alloy steel (AISI 4140), hobbing-machined gear teeth for high load capacity, case-hardened (HRC 60-64) for surface durability

1. Tooth fatigue from prolonged high loads; 2. Abrasion from debris in gear mesh; 3. Corrosion from moisture in lubricant.

1. Keep gear housing free of debris; 2. Use moisture-absorbing breathers to protect lubricant; 3. Recheck gear alignment after 100 hours of operation.

4

NB800M.03.02B

Pinion shaft（grinding）

Alloy steel (AISI 4140), precision-ground gear teeth for tight mesh tolerance, case-hardened for extreme wear resistance

1. Tooth scoring from misalignment; 2. Surface fatigue from cyclic loading; 3. Damage from improper meshing clearance.

1. Set mesh clearance to 0.001-0.002 inches per inch of pitch diameter; 2. Inspect journal runout (max 0.001 inch); 3. Replace if tooth scoring exceeds 0.005 inches.

1

NB800M.03.13

Cylindrical roller bearing：NU3036X2M/C4

Chrome steel (SAE 52100), precision-machined rollers, brass cage, C4 clearance grade for high-speed operation

1. Roller wear from contaminated lubricant; 2. Cage damage from axial overload; 3. Seizure from inadequate lubricant flow.

1. Filter lubricant to 10-micron particle size; 2. Avoid axial loads exceeding bearing specs; 3. Ensure continuous lubricant flow to bearing journals.

2

NB800M.03.09

Bearing sleeve

Carbon steel (AISI 1018) with zinc plating, precision-machined for bearing fit and corrosion resistance

1. Wear from bearing rotation; 2. Corrosion from moisture; 3. Deformation from excessive press fit.

1. Use proper press-fit tools during installation; 2. Inspect plating for wear or damage; 3. Replace if sleeve shows ovality or scoring.

3

NB800M.03.12

Oil seal：7.625"×9.125"×0.625"

Fluorocarbon Rubber (Viton), 75-80 durometer, steel-reinforced, high-temperature and oil-resistant

1. Lip wear from shaft misalignment; 2. Degradation from high temperatures; 3. Damage from debris during installation.

1. Align shaft to minimize runout; 2. Limit operating temperature to 250°F; 3. Clean shaft surface before seal installation.

4

NB800M.03.05

Seal gasket

Nitrile Butadiene Rubber (NBR), 70-75 durometer, oil-resistant for end cover sealing

1. Compression set from prolonged pressure; 2. Tearing from debris; 3. Degradation from lubricant additives.

1. Replace after each end cover removal; 2. Clean sealing surfaces to remove debris; 3. Verify compatibility with lubricant additives.

5

NB800M.03.07

Seal gasket

NBR with metal reinforcement, enhanced rigidity for oil collection box sealing under pressure

1. Metal reinforcement corrosion; 2. Rubber degradation from oil breakdown; 3. Misalignment causing uneven pressure.

1. Inspect metal reinforcement for corrosion; 2. Replace lubricant per maintenance schedule; 3. Ensure proper alignment of oil collection box.

6

NB800M.03.10

Seal gasket

Ethylene Propylene Diene Monomer (EPDM), 70-75 durometer, water and oil-resistant for auxiliary sealing

1. Swelling from excessive moisture; 2. UV degradation if exposed; 3. Tearing from improper installation.

1. Store in dry, dark environments; 2. Install without stretching; 3. Replace if swelling or cracking is observed.

1

ANSI/ASME B18.2.1-1996

Bolt：5/8-11×1 3/4

Carbon steel (Grade 8), zinc-plated, tensile strength 150,000 Psi, compliant with ANSI/ASME dimensional specs

1. Thread wear from over-tightening; 2. Corrosion from drilling fluid splatter; 3. Fatigue from vibration.

1. Torque to 45-55 ft-lbs (per ANSI/ASME B18.2.1-1996); 2. Use anti-seize compound for harsh environments; 3. Inspect for thread damage before reinstallation.

2

ANSI/ASME B18.2.1-1996

Bolt：1/2-13×1 3/8

Carbon steel (Grade 8), zinc-plated, precision-threaded for flange and cover fastening

1. Vibration-induced loosening; 2. Plating wear leading to corrosion; 3. Shear failure from overloading.

1. Use lock washers (GB/T93-1987); 2. Inspect for loosening monthly; 3. Do not exceed rated tensile load.

3

ANSI/ASME B18.2.1-1996

Bolt：3/4-10×2

Alloy steel (Grade 8), zinc-plated, higher tensile strength for heavy-component fastening

1. Thread stripping from cross-threading; 2. Fatigue from cyclic torque; 3. Corrosion from lubricant moisture.

1. Hand-thread first to avoid cross-threading; 2. Torque to 90-100 ft-lbs; 3. Replace if threads are damaged.

4

GB/T93-1987

Washer：16

Spring steel (S65Mn), heat-treated for flexibility, zinc-plated for corrosion resistance

1. Fatigue from repeated compression; 2. Corrosion from moisture; 3. Loss of tension from over-compression.

1. Replace after each removal; 2. Store in dry environments; 3. Avoid over-tightening to preserve spring tension.

5

GB/T93-1987

Washer：14

Spring steel (S65Mn), heat-treated, zinc-plated, designed for 1/2-inch bolts

1. Deformation from excessive torque; 2. Corrosion from drilling fluids; 3. Wear from bolt head movement.

1. Use with matching bolt sizes; 2. Replace deformed washers immediately; 3. Clean before installation for proper seating.

6

GB/T93-1987

Washer：20

Spring steel (S65Mn), heat-treated, zinc-plated, compatible with 3/4-inch bolts for heavy loads

1. Fatigue from high torque; 2. Corrosion from offshore environments; 3. Damage from improper handling.

1. Torque bolts to recommended levels; 2. Inspect for corrosion in wet conditions; 3. Handle with care to avoid bending.

1

NB800M.03.03

Scuff Sleeve

Stainless steel (304), thin-walled, precision-machined to protect shaft surfaces from seal wear

1. Wear from oil seal lip contact; 2. Corrosion from moisture; 3. Damage from improper installation.

1. Replace when installing new oil seals; 2. Ensure tight fit on shaft to avoid movement; 3. Clean surface to prevent debris buildup.

2

NB800M.03.04

End cover

Carbon steel (AISI 1018) with powder-coat finish, designed to protect bearings and seals from debris

1. Corrosion from drilling fluid splatter; 2. Impact damage from job-site debris; 3. Seal groove wear from repeated removal.

1. Clean and touch up powder coat annually; 2. Protect from impact during maintenance; 3. Inspect seal groove for wear before reinstallation.

3

NB800M.03.06.00

Oil collection box

Carbon steel (AISI 1018) with corrosion-resistant coating, designed to collect and redirect lubricant

1. Corrosion from stagnant lubricant; 2. Clogging from debris; 3. Leakage from gasket failure.

1. Clean regularly to remove debris; 2. Ensure lubricant flows freely through collection ports; 3. Replace gaskets (NB800M.03.07) during routine maintenance.

4

NB800M.03.08

Baffle plate

Carbon steel (AISI 1018) with powder-coat finish, directs lubricant flow and blocks debris from bearings

1. Corrosion from lubricant moisture; 2. Impact damage from debris; 3. Wear from lubricant flow.

1. Clean during lubricant changes; 2. Inspect for corrosion and damage; 3. Ensure proper installation to direct lubricant flow.

5

NB800M.03.11

Paring disc pump flange

Alloy steel (AISI 4140), precision-machined for flange connection, heat-treated for rigidity

1. Bolt hole wear from repeated installation; 2. Corrosion from drilling fluids; 3. Misalignment causing uneven load.

1. Align flange with mating component before fastening; 2. Torque bolts evenly; 3. Apply anti-corrosion coating to exposed surfaces.

1

Can I mix different pinion shaft types (NB800M.03.02/03.02A/03.02B) in the same HHF-800 pump?

No—mixing pinion shaft types (standard, hobbing, grinding) causes gear mesh misalignment with the bull gear, accelerating tooth wear and bearing failure. Use matching pinion and bull gear sets, aligned per API Spec 7K Clause 5.4 for optimal performance.

2

How often should I replace the NB800M.03.12 oil seal and scuff sleeve?

Replace oil seals (NB800M.03.12) and scuff sleeves (NB800M.03.03) every 800-1000 hours, or immediately if leakage is detected. Replace both together—worn scuff sleeves damage new seals. Clean the shaft surface thoroughly before installation to prevent seal lip wear.

3

What lubricant is recommended for the NU3036X2M/C4 cylindrical roller bearing?

Use ISO VG 460 industrial gear oil with anti-wear, anti-oxidation, and anti-rust additives, compliant with API GL-4. Replace lubricant every 1000 hours (500 hours in dusty/harsh environments) and clean filters every 250 hours to prevent contamination.