Honghuda Drawworks Supplementary Parts List

1

Pipeline, Baffle plate-work clamp (8-1 NPT1/4M900)

Seamless carbon steel or stainless steel 304; surface galvanized or anti-corrosion painted

1. Pipe wall wear and thinning due to long-term vibration and fluid erosion; 2. Thread damage at connections caused by improper assembly.

1. Secure pipelines with vibration-damping brackets to reduce fatigue; 2. Use thread seal tape or pipe dope during installation; avoid over-tightening to prevent thread stripping; 3. Inspect for corrosion and fluid leakage quarterly; replace if wall thickness is below the specified limit.

2

Pipeline, safety clamp (8 I NPT1/4"-600; 8 I NPT1/4"-1150)

Seamless carbon steel; surface phosphated

1. Bending deformation due to improper routing or rig transportation impact; 2. Corrosion in high-humidity oilfield environments.

1. Route pipelines to avoid sharp bends and contact with moving parts; 2. Apply anti-corrosion grease to exposed surfaces annually; 3. Check for deformation and cracks monthly; straighten minor deformations or replace severely damaged pipes.

3

Quick coupler (H3-62.63.65.66m; H2-62.63.65m.66m)

Coupler body: Aluminum alloy or carbon steel; Internal valve: Alloy steel; Seal: Nitrile rubber

1. Seal wear and leakage caused by frequent connection/disconnection; 2. Internal valve clogging due to contaminated hydraulic oil.

1. Clean the coupler interface before connection to prevent debris ingress; 2. Replace seals annually or when leakage is detected; 3. Use a dust cap to protect unused couplers from contamination; 4. Avoid pulling the pipeline by the coupler to prevent connection damage.

4

Tee joint, clamps (ZY002.08)

Carbon steel or stainless steel; threaded connection

1. Thread wear and leakage due to repeated assembly; 2. Stress cracking at the tee branch caused by uneven pipeline tension.

1. Tighten all connections evenly using a torque wrench; 2. Ensure the tee is installed in a stress-free position; use pipe hangers to distribute tension; 3. Inspect for cracks using magnetic particle inspection (MPI) annually for critical applications.

5

Pipeline, work clamp-work clamp (8 I NPT1AT-650)

Seamless carbon steel; surface galvanized

1. Fluid erosion at pipe bends leading to wall thinning; 2. Thread leakage at connections due to seal degradation.

1. Avoid abrupt changes in fluid flow rate to reduce erosion; 2. Replace thread seals every 12 months; 3. Inspect pipe bends for wear quarterly; replace if thinning is detected.

6

Elbow, right angle (ZY002.03)

Carbon steel or brass; precision machined

1. Internal wear caused by high-velocity fluid impact; 2. Thread damage due to mismatched tools during installation.

1. Use socket wrenches matching the elbow size to avoid rounding edges; 2. Install the elbow with sufficient support to prevent stress on the connection; 3. Inspect for internal wear by measuring pressure drop; replace if flow resistance increases significantly.

7

Pipeline, baffle plate-safety clamp (8 I NPT1/4"-2500; 8 I NPT1/4”)

Seamless carbon steel or stainless steel 304; surface anti-corrosion painted

1. Fatigue cracking due to long-term vibration; 2. Corrosion in offshore or salt-laden environments.

1. Install vibration absorbers for long pipelines (over 2m); 2. For offshore applications, use stainless steel pipes and conduct weekly saltwater rinse; 3. Conduct semi-annual non-destructive testing (NDT) to detect fatigue cracks.

1

Safety clamp (PS80-1B)

Clamp body: Alloy steel 42CrMo; Friction surface: High-temperature resistant composite material

1. Friction surface wear due to frequent braking; 2. Clamp body deformation caused by thermal expansion and contraction from high braking temperatures.

1. Inspect friction surface thickness monthly; replace when wear exceeds 3mm; 2. Ensure adequate cooling of the brake system to prevent overheating (max temperature ≤ 250°C); 3. Check clamp body alignment annually; adjust or replace if deformation is detected.

2

Frame, half, disk brake (JC055.09.00)

Q345B high-strength alloy steel; welded structure with stress relief treatment

1. Weld cracking due to cyclic thermal stress and vibration; 2. Corrosion of the frame surface in humid environments.

1. Conduct semi-annual NDT of welds to detect cracks; repair immediately if found; 2. Apply anti-corrosion paint to the frame surface annually; touch up paint on scratched areas; 3. Ensure the frame is mounted on a level surface to avoid uneven stress distribution.

3

Working clamp (PS80-1K)

Clamp body: Cast alloy steel; Pressure plate: 45# steel with quenching treatment

1. Pressure plate wear due to repeated contact with the brake disc; 2. Spring fatigue in the clamp leading to insufficient clamping force.

1. Lubricate the clamp's moving parts with high-temperature grease every 500 operating hours; 2. Inspect the pressure plate for wear and uneven contact; grind or replace if necessary; 3. Check the clamp spring's elastic force quarterly; replace fatigued springs.

4

Brake pad

Base plate: Carbon steel; Friction material: Ceramic or organic composite (high-temperature resistant, low noise)

1. Friction material wear and ablation under high-temperature braking; 2. Delamination of friction material from the base plate due to thermal shock.

1. Replace brake pads when friction material thickness is less than 2mm; 2. Avoid frequent emergency braking to reduce thermal shock; 3. Ensure the brake pad is correctly installed with all fasteners tightened to specified torque.

5

Bottom plate (JC055.09.02)

Q235 carbon steel; surface painted

1. Wear of the mounting surface due to long-term contact with the brake frame; 2. Corrosion leading to reduced structural strength.

1. Inspect the mounting surface for flatness annually; grind if deformation exceeds 0.05mm; 2. Clean the bottom plate regularly to remove dust and oil; 3. Touch up anti-corrosion paint as needed to prevent rust.

6

Adjusting back block (JC055.09.03)

Alloy steel 40Cr; quenched and tempered

1. Wear of the adjusting thread due to frequent brake gap adjustment; 2. Surface wear caused by contact with the clamp.

1. Apply anti-seize compound to the adjusting thread before installation; 2. Adjust the brake gap strictly according to the manual to avoid excessive wear; 3. Inspect the back block for wear quarterly; replace if the wear gap exceeds 0.1mm.

1

Washer, 30 (GB/T93-87)

Spring steel; surface phosphated

1. Loss of elastic tension due to long-term compression; 2. Corrosion leading to brittle fracture.

1. Do not reuse washers that fail to spring back after compression; 2. Install washers with the curved side facing the nut to ensure effective anti-loosening; 3. Store spare washers in a dry environment to prevent corrosion.

2

Bolt, M30x65 (GB/T5783-1986); Bolt, M30x110 (GB/T5782-1986)

8.8 grade alloy steel; surface zinc-nickel plated

1. Thread wear due to repeated assembly/disassembly; 2. Fatigue failure caused by cyclic vibration and load stress.

1. Use a torque wrench to tighten to the specified torque (refer to Honghuda manual); 2. Apply anti-loosening thread lock compound (e.g., Loctite 243) for high-vibration positions; 3. Replace bolts that have been disassembled more than 3 times for critical applications.

3

Screw, M12x30 (BG75B-5); Screw, M12x25 (BG75B-19)

8.8 grade carbon steel; surface black oxide treated

1. Head wear from improper tool use; 2. Thread corrosion due to contact with hydraulic oil.

1. Use socket wrenches matching the screw head size to avoid rounding; 2. Clean threads with a wire brush before installation; remove oil residue; 3. Inspect screw tightness monthly during routine maintenance.

4

Spring washer, 12 (BG75B-6)

Spring steel; surface galvanized

1. Deformation and loss of elasticity due to over-tightening; 2. Corrosion in humid environments.

1. Strictly follow the recommended tightening torque; avoid over-compressing the washer; 2. Replace spring washers if signs of deformation or corrosion are present; 3. Do not stack multiple spring washers to increase preload.

5

Pin B8x40 (BG75B-21)

45# carbon steel; surface quenched

1. Shear failure due to lateral load stress; 2. Wear of the pin surface caused by sliding contact.

1. Ensure the pin is fully seated and secured with cotter pins or retaining rings; 2. Lubricate the pin with lithium-based grease if it is in sliding contact; 3. Replace pins immediately if signs of shear (e.g., cracks) are detected.

1

Piston rod (BG75B-1)

Alloy steel 40Cr; surface hard chrome plated

1. Chrome plating peeling due to impact or friction with foreign objects; 2. Rod bending deformation due to uneven load.

1. Protect the rod surface from scratches and impacts during maintenance; 2. Inspect the rod for straightness monthly using a dial gauge; straighten or replace if bending exceeds 0.05mm/m; 3. Clean the rod surface before retraction to prevent debris from damaging the seal.

2

Wiper seal d70 (BG75B-2)

Nitrile rubber (NBR) or fluororubber (Viton)

1. Wear of the wiper lip due to friction with the piston rod; 2. Aging and cracking caused by high temperature and oil exposure.

1. Replace wiper seals every 12 months or when oil leakage is detected; 2. Ensure the rod surface is smooth and free of burrs before installing the seal; 3. Use a seal installer tool to avoid damaging the seal lip.

3

End cover, front (BG75B-3)

Aluminum alloy or cast iron; seal groove machined

1. Seal groove wear due to repeated seal replacement; 2. Deformation caused by improper installation torque.

1. Tighten the end cover bolts evenly in a crisscross pattern; 2. Inspect the seal groove for wear when replacing seals; rework or replace the end cover if wear is excessive; 3. Clean the end cover and mating surface before installation.

4

Wear ring 10x2.5x226.5 (BG75B-4); Wear ring 10X2.5X462 (BG75B-11)

Polyoxymethylene (POM) or bronze

1. Wear due to sliding friction with the piston or cylinder wall; 2. Deformation caused by high temperature.

1. Inspect the wear ring for clearance monthly; replace if the gap exceeds 0.1mm; 2. Ensure adequate lubrication of the hydraulic system to reduce friction; 3. Avoid operating the cylinder at temperatures above 120°C (POM limit) or 200°C (bronze limit).

5

O ring 71x3.55 (BG75B-8); O ring 160X5.3 (BG75B-7); O ring 140X3.55 (BG75B-12)

Nitrile rubber (NBR) or fluororubber (Viton)

1. Compression set and aging due to long-term compression; 2. Damage caused by sharp edges in the seal groove.

1. Replace O rings every 12 months or when signs of hardening, cracking, or compression set are observed; 2. Ensure the seal groove is free of burrs and sharp edges; 3. Store O rings in a cool, dry environment away from direct sunlight and ozone sources.

6

Seal ring CKS0700 (BG75B-9)

Fluororubber (Viton) with fabric reinforcement

1. Fabric wear due to high-pressure fluid flow; 2. Rubber degradation in corrosive hydraulic oil.

1. Use hydraulic oil compatible with fluororubber (refer to material specifications); 2. Inspect the seal ring for fabric fraying and rubber damage quarterly; replace if necessary; 3. Ensure proper installation to avoid twisting the seal ring.

7

Retainer CKW1500 (BG75B-10); Retainer (BG75B-18)

Carbon steel or stainless steel; surface plated

1. Wear of the retaining surface due to contact with seals; 2. Corrosion leading to reduced retaining force.

1. Inspect the retainer for wear and corrosion quarterly; 2. Replace the retainer if the retaining surface is damaged or corrosion is severe; 3. Ensure the retainer is correctly installed to prevent seal displacement.

8

Locking nut (BG75B-13); Setting Nut (BG75B-16)

Alloy steel; surface zinc plated

1. Thread wear due to frequent adjustment; 2. Loosening due to vibration.

1. Apply anti-loosening thread lock compound after final adjustment; 2. Mark the nut position after tightening to monitor for loosening; 3. Replace nuts if threads are damaged or worn.

9

Dish spring (BG75B-14); Spring

Spring steel 50CrVA; surface phosphated

1. Fatigue failure due to cyclic compression; 2. Elastic degradation caused by high temperature.

1. Check the spring's elastic performance quarterly; replace if it fails to return to the original shape after compression; 2. Avoid operating in temperatures above 200°C (critical temperature for 50CrVA); 3. Store spare springs in a dry environment to prevent corrosion.

10

Cylinder liner (BG75B-15)

Alloy steel 27SiMn; surface honed and nitrided

1. Inner surface wear due to friction with the piston; 2. Nitride layer peeling due to impact.

1. Ensure the hydraulic oil is clean; replace filters regularly to prevent debris from causing wear; 2. Inspect the inner surface for wear and nitride layer peeling annually; honing or replace if necessary; 3. Avoid impact loads on the cylinder liner during assembly.

11

Key (BG75B-17)

45# carbon steel; surface quenched

1. Shear failure due to torque transmission; 2. Wear of the key and keyway due to vibration.

1. Ensure the key fits tightly in the keyway; no excessive play; 2. Inspect the key and keyway for wear quarterly; replace if wear is excessive; 3. Apply anti-loosening compound to the key before installation to prevent movement.

1

Grease fitting 45℃ M10x1 (BG75B-20); Grease fitting, M10x1 (BG75B-26)

Carbon steel or stainless steel; surface zinc plated

1. Clogging of the grease channel due to dust and debris; 2. Thread wear due to repeated grease gun connection.

1. Clean the fitting before connecting the grease gun; 2. Install a dust cap on unused fittings to prevent contamination; 3. Replace fittings if the grease channel is clogged or threads are damaged.

2

Filter disk (BG75B-22)

Stainless steel mesh or filter paper; plastic or metal frame

1. Clogging due to contamination in hydraulic oil; 2. Damage to the filter medium caused by high-pressure fluid.

1. Replace filter disks every 500 operating hours or when differential pressure exceeds the limit; 2. Use filter disks of the correct specification (do not use non-original parts); 3. Inspect the filter housing for leaks after replacement.

3

Breather valve (BG75B-23)

Valve body: Aluminum alloy; Filter element: Polyurethane foam; Seal: Nitrile rubber

1. Filter element clogging due to dust ingress; 2. Seal failure leading to moisture ingress.

1. Clean or replace the filter element every 3 months; 2. Inspect the seal for wear and replace annually; 3. Ensure the breather valve is installed vertically to prevent water accumulation.

1

Kit for spring replacement

Dish springs, coil springs, retaining pins, installation tools (as per Honghuda specification)

Used for replacing fatigued or damaged springs in the brake and clamp systems. Ensure all springs in the kit match the original specifications for load capacity.

Store in a dry, sealed container to prevent corrosion; avoid compressing springs during storage; check component integrity before use.

2

Seal Kit for BG75B Brake Caliper; Seal Kit for KG80 Brake Caliper

O rings, wiper seals, seal rings, wear rings, retaining rings (customized for specific caliper models)

Used for comprehensive sealing system replacement in brake calipers. Follow the maintenance manual for proper installation sequence to ensure sealing performance.

Store in a cool, dry environment away from sunlight and oil; avoid bending or stretching seals; use within the kit's shelf life (typically 2 years).

1

Crown bar (BG75B-24)

Alloy steel 42CrMo; surface quenched and tempered

1. Wear of the contact surface due to load transmission; 2. Fatigue cracking under cyclic load.

1. Inspect the crown bar for wear and cracks quarterly; 2. Lubricate the contact surface regularly to reduce friction; 3. Conduct annual NDT to detect fatigue damage; replace if cracks are found.

2

Oscillating bearing (BG75B-25)

Inner/outer ring: Alloy steel; Rolling elements: Bearing steel; Cage: Nylon or steel

1. Bearing wear due to insufficient lubrication; 2. Damage caused by dust and debris ingress.

1. Lubricate the bearing with lithium-based grease every 800 operating hours; 2. Install effective dust seals to prevent contamination; 3. Inspect for smooth rotation and abnormal noise monthly; replace if worn or damaged.