HHF-800 Drilling Pump Crosshead Assembly (NB800M.04.00) Parts

1

NB800M.04.01

Crosshead

Alloy steel (AISI 4140), heat-treated for tensile strength (HRC 45-50), precision-machined for sliding and bearing fit

1. Sliding wear from inadequate lubrication; 2. Fatigue cracking from cyclic load; 3. Misalignment-induced stress concentrations.

1. Use high-pressure lubricant (ISO VG 680) with anti-wear additives; 2. Align with guides per API Spec 7K Clause 6.3; 3. Inspect for cracks every 500 hours.

2

NB800M.04.18

Crosshead pin

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

1. Journal wear from bearing friction; 2. Corrosion from lubricant moisture; 3. Bending stress from uneven load.

1. Maintain lubricant cleanliness (10-micron filtration); 2. Check pin runout (max 0.001 inch); 3. Replace bearings (NB800M.04.17) at first sign of wear.

3

NB800M.04.09

Rod

Alloy steel (AISI 1045), heat-treated for rigidity, precision-machined for connection to crosshead and pump plunger

1. Bending fatigue from misalignment; 2. Thread wear from repeated assembly; 3. Corrosion from drilling fluid exposure.

1. Align with crosshead to avoid bending; 2. Apply anti-corrosion coating to exposed threads; 3. Tighten connections to recommended torque.

4

NB800M.04.15

Crosshead pin baffler

Carbon steel (AISI 1018) with corrosion-resistant coating, designed to protect crosshead pin and bearing from debris

1. Impact damage from job-site debris; 2. Corrosion from drilling fluid splatter; 3. Wear from component movement.

1. Clean during lubricant changes; 2. Inspect for cracks or deformation; 3. Replace if debris shielding is compromised.

1

NB800M.04.17

Bearing, crosshead：NNAL 6/177.8-1 Q4/W33XYA2

Chrome steel (SAE 52100), cylindrical roller design, brass cage, W33 lubrication groove, Q4 precision grade

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

1. Ensure continuous lubricant flow to bearing; 2. Replace lubricant every 800 hours; 3. Use shims (NB800M.04.19.00) to set proper clearance.

2

NB800M.04.02

Slide, upper

Alloy steel (AISI 4140), heat-treated for wear resistance, precision-machined sliding surfaces with anti-friction coating

1. Sliding wear from inadequate lubrication; 2. Scoring from debris; 3. Misalignment causing uneven contact.

1. Keep sliding surfaces clean; 2. Apply high-pressure lubricant before operation; 3. Align with lower slide (NB800M.04.13) to ensure even contact.

3

NB800M.04.13

Slide, lower

Alloy steel (AISI 4140), heat-treated, precision-machined, matching upper slide for seamless sliding motion

1. Wear from cyclic sliding motion; 2. Corrosion from lubricant moisture; 3. Damage from debris buildup.

1. Inspect sliding surfaces for scoring; 2. Clean debris during maintenance; 3. Reapply anti-friction coating every 1000 hours.

4

NB800M.04.19.00

Shim set

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

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

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

5

NB800M.04.21

Adjusting shim

Stainless steel, thicker gauge for coarse clearance adjustment, precision-machined for flatness

1. Wear from component movement; 2. Corrosion from lubricant exposure; 3. Deformation from uneven load.

1. Use with shim set (NB800M.04.19.00) for precise adjustment; 2. Inspect for flatness during maintenance; 3. Replace if deformed.

1

NB800M.04.04

Double lip oil seal：4"×5"×0.5"

Fluorocarbon Rubber (Viton), 75-80 durometer, steel-reinforced, double-lip design for enhanced sealing

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.

2

NB800M.04.05

Oil seal ring

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

1. Compression set from prolonged pressure; 2. Swelling from incompatible lubricants; 3. Tearing from improper installation.

1. Replace after each disassembly; 2. Verify lubricant compatibility; 3. Install without stretching to preserve seal integrity.

3

NB800M.04.07

Seal gasket

NBR with metal reinforcement, enhanced rigidity for stuffing box and end cover sealing under pressure

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

1. Inspect metal layer for corrosion; 2. Replace lubricant per schedule; 3. Ensure proper alignment of mating components.

4

NB800M.04.16

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. Damage from debris during installation.

1. Store in dry, dark environments; 2. Clean sealing surfaces before installation; 3. Replace if swelling or cracking is observed.

5

GB/T3452.1-2005

O ring：160×3.55-G-S

Viton, 75 durometer, precision-molded for high-pressure sealing, compliant with GB/T3452.1-2005

1. Extrusion from high pressure; 2. Degradation from chemical exposure; 3. Damage from sharp mating surfaces.

1. Ensure mating surfaces are smooth; 2. Verify pressure rating matches operating conditions; 3. Replace if O-ring shows signs of extrusion.

6

GB/T3452.1-2005

O ring：128×7-G-S

Viton, 75 durometer, thick-walled for enhanced durability in high-pressure applications

1. Compression set from prolonged use; 2. Damage from improper groove fit; 3. Degradation from high temperatures.

1. Use proper groove dimensions per GB/T3452.1-2005; 2. Replace every 800 hours; 3. Avoid over-compression during installation.

7

GB/T3452.1-2005

O ring：103×5.3-G-S

Viton, 75 durometer, precision-molded for tight-fit sealing, compatible with stuffing box components

1. Tearing from stretching during installation; 2. Chemical degradation from drilling fluids; 3. Wear from component movement.

1. Install without stretching; 2. Protect from chemical exposure; 3. Inspect for wear during routine maintenance.

1

NB800M.04.03

Bolt：3/4-10UNC-2A×1 1/2

Alloy steel (Grade 8), heat-treated, zinc-plated, tensile strength 150,000 Psi, precision-threaded

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

1. Torque to 90-100 ft-lbs; 2. Use anaerobic adhesive (242) for thread locking; 3. Inspect for thread damage before reinstallation.

2

NB800M.04.14

Bolt：3/4-10UNC-2A×2

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

1. Bending fatigue from vibration; 2. Thread stripping from cross-threading; 3. Corrosion from lubricant moisture.

1. Hand-thread first to avoid cross-threading; 2. Secure with anaerobic adhesive; 3. Inspect shank for bending during maintenance.

3

ANSI/ASME B18.2.1-1996

Bolt：3/8-16×1 3/8

Carbon steel (Grade 8), zinc-plated, compliant with ANSI/ASME specs for light-duty 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.

4

ASME B18.3-2002

Bolt：5/8-11×2

Alloy steel (Grade 8), zinc-plated, compliant with ASME B18.3-2002 for dimensional accuracy

1. Thread wear from repeated installation; 2. Fatigue from cyclic torque; 3. Corrosion from drilling fluid splatter.

1. Torque to 55-65 ft-lbs; 2. Use anti-seize compound for harsh environments; 3. Replace if threads are damaged.

5

GB/T93-1987

Washer：10

Spring steel (S65Mn), heat-treated for flexibility, zinc-plated for corrosion resistance, compatible with 3/8-inch bolts

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.

6

GB/T4240-1993

Stainless steel wire：φ1.60（L＝300）

Stainless steel (304), 1.60mm diameter, 300mm length, compliant with GB/T4240-1993 for locking applications

1. Fatigue from vibration; 2. Corrosion from moisture; 3. Breakage from over-tensioning.

1. Install per ANSI/ASME B18.2.1-1996 locking guidelines; 2. Avoid over-tensioning during installation; 3. Replace during routine maintenance.

7

GB/T4240-1993

Stainless steel wire：φ1.60（L＝500）

Stainless steel (304), 1.60mm diameter, 500mm length, heavy-duty for larger component locking

1. Wear from component movement; 2. Corrosion from offshore environments; 3. Kinking during installation.

1. Handle with care to avoid kinking; 2. Inspect for corrosion in wet conditions; 3. Replace if wire shows signs of fatigue.

8

GB/T4240-1993

Stainless steel wire：φ1.60（L＝400）

Stainless steel (304), 1.60mm diameter, 400mm length, versatile for mid-size component locking

1. Breakage from improper bending; 2. Corrosion from chemical exposure; 3. Fatigue from cyclic vibration.

1. Bend gently during installation; 2. Protect from drilling fluids; 3. Replace if wire is kinked or cracked.

9

NB800M.04.11

Lock spring

Spring steel (S65Mn), heat-treated for flexibility and fatigue resistance, precision-formed for locking retention

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

1. Replace after each disassembly; 2. Store in dry environments; 3. Install without over-compressing to preserve spring life.

10

NB800M.04.12

Lockup plate

Carbon steel (AISI 1018) with zinc plating, precision-machined for fastener locking and component retention

1. Wear from fastener contact; 2. Corrosion from moisture; 3. Bending from improper installation.

1. Align with fasteners before tightening; 2. Inspect for bending during maintenance; 3. Replace if locking tabs are worn.

11

242

Anaerobic adhesive for thread locking and sealing

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

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. Allow 24 hours for full curing.

1

NB800M.04.06

Stuffing box

Carbon steel (AISI 1018) with corrosion-resistant coating, designed to house seals and prevent lubricant leakage

1. Corrosion from drilling fluid intrusion; 2. Wear from seal movement; 3. Leakage from gasket failure.

1. Inspect seals and gaskets regularly; 2. Clean internal surfaces during maintenance; 3. Replace gaskets (NB800M.04.07) when leaking.

2

NB800M.04.08

End cover

Carbon steel (AISI 1018) with powder-coat finish, protects internal components from debris and moisture

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

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

3

NB800M.04.10

Mud guard plate

Carbon steel (AISI 1018) with anti-corrosion coating, designed to block drilling mud from internal components

1. Impact damage from mud and debris; 2. Corrosion from drilling fluids; 3. Bending from heavy debris impact.

1. Clean mud buildup regularly; 2. Inspect for cracks or bending; 3. Replace if shielding capability is compromised.

4

NB800M.04.20

Pipe connector：NPT3/8×50.8

Brass, corrosion-resistant, NPT 3/8-inch thread, 50.8mm length, for lubricant line connectivity

1. Thread wear from repeated connection; 2. Corrosion from chemical exposure; 3. Leakage from improper threading.

1. Use thread sealant during installation; 2. Tighten to 25-30 ft-lbs; 3. Inspect for leaks after installation.

1

What is the correct lubricant for the NB800M.04.17 crosshead bearing?

Use ISO VG 680 high-pressure industrial gear oil with anti-wear, anti-oxidation, and anti-rust additives, compliant with API GL-4. Replace lubricant every 800 hours (400 hours in harsh/dusty environments) and maintain 10-micron filtration to prevent contamination.

2

How often should I replace the double lip oil seals (NB800M.04.04) and O-rings?

Replace double lip oil seals and O-rings every 800-1000 hours, or immediately if leakage is detected. Replace all seals together when servicing the stuffing box or end cover—worn mating surfaces can damage new seals. Clean shaft/sealing surfaces thoroughly before installation.

3

How do I adjust crosshead bearing clearance with NB800M.04.19.00 shims?

Use NB800M.04.19.00 shims to set clearance to 0.003-0.005 inches (per HHF-800 specs). Disassemble the crosshead, add/remove shims between the bearing and crosshead housing, then reassemble and verify clearance with a feeler gauge. Follow API Spec 7K Clause 6.3 for alignment and clearance guidelines.