HHF-800 Drilling Pump Crankshaft Assembly (NB800M.02.00)

1

NB800M.02.01.00

Cover, main bearing

Alloy steel (AISI 1045), precision-machined for bearing fit, with corrosion-resistant coating

1. Corrosion from lubricant moisture; 2. Deformation from uneven torque; 3. Wear from bearing misalignment.

1. Torque evenly per assembly specs; 2. Inspect for corrosion during lubricant changes; 3. Align with bearing housing to avoid uneven stress.

2

NB800M.02.01A.00

Cover, main bearing

Alloy steel (AISI 1045), optimized for left/right bearing position, with powder-coat finish for extra protection

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

1. Protect from debris during installation; 2. Replace if seal groove shows wear; 3. Clean and touch up coating after maintenance.

3

NB800M.02.08.00

Crankshaft

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

1. Journal wear from inadequate lubrication; 2. Fatigue cracking from cyclic torque; 3. Scoring from contaminated lubricant.

1. Use ISO VG 460 lubricant with anti-wear additives; 2. Inspect journals for scoring every 500 hours; 3. Replace lubrication filters regularly (250-hour intervals).

4

NB800M.02.10.00

Bull gear

Alloy steel (AISI 4140), carburized and hardened for tooth durability, precision-machined for mesh accuracy

1. Tooth wear from misalignment with pinion gear; 2. Pitting from lubricant breakdown; 3. Impact damage from sudden load spikes.

1. Align with pinion gear per API Spec 7K Clause 5.4; 2. Monitor lubricant temperature (max 120°F); 3. Avoid sudden pump start-stop cycles.

5

NB800M.02.10A

Bull gear（hobbing ）

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

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; 3. Inspect tooth profile for wear quarterly.

6

NB800M.02.10B

Bull gear（gear grinding）

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

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. Recheck alignment after 100 hours of operation; 3. Replace if tooth scoring exceeds 0.005 inches.

7

NB800M.02.06

rod

Alloy steel (AISI 1045), heat-treated for tensile strength, precision-machined for assembly compatibility

1. Bending fatigue from uneven load distribution; 2. Corrosion from lubricant additives; 3. Wear at connection points.

1. Inspect for bending during maintenance; 2. Use compatible lubricants (avoid corrosive additives); 3. Tighten connection fasteners to recommended torque.

1

NB800M.02.02

Sleeve, main bearing (right)

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; 3. Replace if sleeve shows ovality or scoring.

2

NB800M.02.16

Sleeve, main bearing（left）

Carbon steel (AISI 1018) with zinc plating, optimized for left main bearing alignment and load distribution

1. Abrasion from bearing movement; 2. Corrosion from lubricant moisture; 3. Damage from improper installation.

1. Align with bearing before press-fitting; 2. Clean surfaces to remove debris; 3. Store in dry environments to prevent plating damage.

3

NB800M.02.22

Eccentric bearing：NUP 464775 Q4/C9YA4

Chrome steel (SAE 52100), precision-machined rollers, cage made of high-strength brass, C9 clearance grade

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

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

4

NB800M.02.23

Main bearing：23148/C3W33

Chrome steel (SAE 52100), spherical roller design, C3 clearance, W33 lubrication groove for enhanced oil flow

1. Roller wear from misalignment; 2. Corrosion from water contamination; 3. Fatigue from cyclic loading.

1. Align crankshaft to within 0.001-inch runout; 2. Use water-resistant lubricants for wet environments; 3. Inspect for bearing noise every 100 hours.

5

NB800M.02.04

Insider retainer

Alloy steel (AISI 1045), heat-treated for rigidity, precision-machined for bearing retention

1. Wear from bearing rotation; 2. Fatigue from cyclic load; 3. Corrosion from lubricant additives.

1. Inspect for wear on retaining surfaces; 2. Replace if retainer shows deformation; 3. Ensure proper fit to prevent bearing movement.

6

NB800M.02.05.00

Outside retainer

Alloy steel (AISI 1045), optimized for external bearing retention, with corrosion-resistant coating

1. Impact damage from debris; 2. Corrosion from drilling fluid exposure; 3. Wear from assembly/disassembly.

1. Protect from job-site debris; 2. Clean and inspect after maintenance; 3. Tighten retaining fasteners to recommended torque.

7

NB800M.02.17

retainer ring

Spring steel (S65Mn), heat-treated for flexibility, designed for axial retention of components

1. Fatigue from repeated compression; 2. Corrosion from moisture; 3. Damage from improper installation.

1. Replace after each removal; 2. Store in dry environments; 3. Use proper tools to avoid bending during installation.

1

NB800M.02.11

bolt：1 1/8-8UN-2A×125

Alloy steel (Grade 9), heat-treated for ultra-high tensile strength (170,000 Psi), zinc-plated for corrosion resistance

1. Thread wear from over-tightening; 2. Fatigue from vibration; 3. Corrosion from harsh drilling environments.

1. Torque to 550-600 ft-lbs (per ANSI/ASME B18.2.1-1996); 2. Use thread-locking adhesive (NB800M.02.24); 3. Inspect for thread damage before reinstallation.

2

NB800M.02.11A

bolt：1 1/8-8UN-2A×100

Alloy steel (Grade 9), heat-treated, zinc-plated, precision-threaded for secure fastening

1. Shear failure from uneven load; 2. Plating wear leading to corrosion; 3. Thread stripping from cross-threading.

1. Hand-thread first to avoid cross-threading; 2. Replace if plating is worn; 3. Ensure even load distribution across fasteners.

3

NB800M.02.12.00

Locking nut：1 1/8-8UN-2B

Alloy steel (Grade 9), heat-treated, with nylon insert for vibration resistance, compatible with Grade 9 bolts

1. Nylon insert wear from repeated use; 2. Thread damage from contaminated threads; 3. Corrosion leading to seizing.

1. Replace nuts with worn inserts; 2. Clean threads before installation; 3. Use anti-seize compound for offshore use.

4

NB800M.02.14

Bolt, main bearing：2 1/4-8UN-3A

Alloy steel (Grade 10), ultra-high tensile strength (180,000 Psi), heat-treated for heavy-load applications

1. Fatigue from cyclic torque; 2. Thread wear from over-torque; 3. Corrosion from lubricant moisture.

1. Torque to 1200-1300 ft-lbs; 2. Inspect for fatigue cracks quarterly; 3. Use corrosion-resistant lubricants.

5

NB800M.02.19

Bolt：5/8-11×1 1/2

Carbon steel (Grade 8), zinc-plated, tensile strength 150,000 Psi, compatible with cover and retainer fastening

1. Vibration-induced loosening; 2. Corrosion from drilling fluid splatter; 3. Shear failure from overloading.

1. Use lock washers or thread-locking adhesive; 2. Inspect for loosening monthly; 3. Do not exceed rated load.

6

ANSI/ASME B18.2.1-1996

Bolt：5/8-11×1 3/4

Carbon steel (Grade 8), zinc-plated, compliant with ANSI/ASME standards for dimensional accuracy

1. Thread wear from repeated installation; 2. Plating damage from tools; 3. Fatigue from vibration.

1. Use calibrated torque wrenches (45-55 ft-lbs); 2. Avoid over-tightening; 3. Store bolts in corrosion-free containers.

7

GB/T97.2-1985

Washer：16

Carbon steel with zinc plating, flat design to distribute torque and prevent surface damage

1. Deformation from over-torque; 2. Corrosion from moisture; 3. Wear from bolt head movement.

1. Use washers matching bolt size; 2. Replace deformed washers; 3. Clean surfaces before installation for proper seating.

8

NB800M.02.20

Bolt：5/8-11×4 3/4

Alloy steel (Grade 8), zinc-plated, long-shank design for deep-component fastening

1. Bending fatigue from vibration; 2. Thread wear from contaminated threads; 3. Corrosion from harsh environments.

1. Secure with thread-locking adhesive; 2. Inspect shank for bending; 3. Clean threads before installation.

9

NB800M.02.21

Bolt：5/8-11×4

Alloy steel (Grade 8), zinc-plated, precision-threaded for secure fastening of heavy components

1. Torque-related thread damage; 2. Corrosion from lubricant moisture; 3. Shear failure from misaligned loads.

1. Torque to 50-60 ft-lbs; 2. Ensure alignment to distribute load; 3. Replace if threads are damaged.

10

GB/T343-1994

Locking wire：SZ-1.50

Stainless steel (304), 1.50mm diameter, high tensile strength for fastener locking

1. Fatigue from vibration; 2. Corrosion from moisture; 3. Breakage from improper installation.

1. Install per ANSI/ASME B18.2.1-1996 guidelines; 2. Replace if wire shows kinks or wear; 3. Use proper tension to avoid breakage.

11

GB/T343-1994

Locking wire：SZ-3.00

Stainless steel (304), 3.00mm diameter, heavy-duty for high-torque fastener locking

1. Breakage from over-tension; 2. Corrosion from aggressive environments; 3. Wear from component movement.

1. Avoid over-tensioning during installation; 2. Inspect for corrosion in offshore environments; 3. Replace during routine maintenance.

1

NB800M.02.03

Seal gasket

Nitrile Butadiene Rubber (NBR), 70-75 durometer, oil-resistant for lubricant system sealing

1. Degradation from high temperatures; 2. Tearing from debris during installation; 3. Compression set from prolonged pressure.

1. Replace after each removal; 2. Clean sealing surfaces to remove debris; 3. Limit operating temperature to 220°F.

2

NB800M.02.07

Locating ring（Ⅰ）

Alloy steel (AISI 1045), heat-treated for rigidity, precision-machined for crankshaft alignment

1. Wear from crankshaft rotation; 2. Corrosion from lubricant moisture; 3. Deformation from misalignment.

1. Inspect for wear on locating surfaces; 2. Replace if ring shows ovality; 3. Ensure proper alignment during installation.

3

NB800M.02.09

Locating ring（Ⅱ）

Alloy steel (AISI 1045), optimized for secondary crankshaft alignment, corrosion-resistant coating

1. Abrasion from component movement; 2. Corrosion from drilling fluid contamination; 3. Damage from improper installation.

1. Clean before installation; 2. Inspect for corrosion regularly; 3. Align with crankshaft to avoid uneven wear.

4

NB800M.02.13

spacer ring

Carbon steel (AISI 1018) with zinc plating, precision-ground for load distribution and component spacing

1. Wear from component movement; 2. Corrosion from moisture; 3. Deformation from excessive load.

1. Inspect for flatness during maintenance; 2. Replace if deformed; 3. Ensure proper spacing to distribute load evenly.

5

NB800M.02.15.00

Shim set

Stainless steel shims, precision-ground (0.001-0.010 inch thicknesses) for bearing clearance adjustment

1. Deformation from excessive pressure; 2. Corrosion from moisture; 3. Damage from improper handling.

1. Select proper thickness for bearing clearance; 2. Store in dry, organized containers; 3. Avoid bending or stacking beyond limits.

6

NB800M.02.18

Baffle plate

Carbon steel (AISI 1018) with powder-coat finish, designed to direct lubricant flow and block debris

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

1. Clean regularly to remove debris; 2. Inspect for corrosion; 3. Ensure proper installation to direct lubricant flow.

7

NB800M.02.24

Anaerobic adhesive for thread locking and sealing

Single-component anaerobic formula, resistant to oil, fuel, and high temperatures (up to 300°F)

1. Degradation from expired shelf life; 2. Ineffectiveness from contaminated threads; 3. Breakdown from extreme temperatures.

1. Use before expiration date; 2. Clean threads with solvent before application; 3. Avoid exposure to temperatures above 300°F.

1

What is the correct bearing clearance for the NB800M.02.23 main bearing?

For 23148/C3W33 main bearings, use NB800M.02.15.00 shims to set clearance to 0.003-0.005 inches (per HHF-800 specs). Incorrect clearance causes premature wear or seizure—follow API Spec 7K Clause 6.2 for adjustment guidelines.

2

How often should I replace the NB800M.02.24 anaerobic adhesive?

Replace unopened adhesive every 12 months (shelf life). Once opened, use within 3 months and store in a cool, dry place (60-80°F). Always clean threads with solvent before application to ensure effective locking/sealing, per manufacturer specs.

3

Can I mix different bull gear types (NB800M.02.10.00/10A/10B) in the same assembly?

No—mixing bull gear types (standard, hobbing, gear grinding) causes mesh misalignment, accelerating tooth wear and component failure. Use matching gear sets and align per ANSI/ASME B18.2.1-1996 to ensure optimal performance and service life.