Lanzhou LS Drawworks JC50D Cylinder Shifter Installation 106.60.70.00

1

106.60.70.00

Cylinder shifter installation

High-strength alloy steel (40Cr) + engineering plastic (shift components)

1. High vibration during drilling causing component loosening; 2. Insufficient lubrication leading to internal wear; 3. Mud contamination corroding metal parts.

1. Lubricate key shifting points weekly with API-compliant lubricant; 2. Clean surface mud after each shift to prevent contamination; 3. Inspect for loosening daily and retighten to standard torque.

2

106.60.70.01

otic placode

Stainless steel (304) for corrosion resistance

1. Impact during shifting operations; 2. Long-term exposure to drilling mud causing rust; 3. Improper installation leading to uneven stress.

1. Ensure accurate alignment during installation to avoid stress concentration; 2. Apply anti-rust grease monthly in coastal/humid environments; 3. Avoid violent shifting to reduce impact.

1

GB882-86

Pin roll

Carbon steel (45#) with quenching treatment

1. High vibration causing metal fatigue; 2. Lack of lubrication leading to friction wear; 3. Overloading beyond GB882-86 rated load.

1. Replace every 2 months or if bending is found; 2. Apply lubricating oil weekly to reduce friction; 3. Ensure load does not exceed GB882-86 standard (Φ10-Φ16: 5-12kN).

2

GB91-86

Cotter pin

Carbon steel (Q235) with galvanized anti-rust coating

1. Metal fatigue from repeated shifting vibration; 2. Galvanized layer damage causing rust; 3. Improper bending during installation leading to fracture.

1. Bend at 45° during installation (not over-bend); 2. Inspect galvanized layer weekly and replace if damaged; 3. Replace immediately if cracks or rust appear.

3

GB882-86

Pin roll

Carbon steel (45#) with quenching treatment

1. High vibration causing metal fatigue; 2. Lack of lubrication leading to friction wear; 3. Overloading beyond GB882-86 rated load.

1. Replace every 2 months or if bending is found; 2. Apply lubricating oil weekly to reduce friction; 3. Ensure load does not exceed GB882-86 standard (Φ10-Φ16: 5-12kN).

4

GB91-86

Cotter pin

Carbon steel (Q235) with galvanized anti-rust coating

1. Metal fatigue from repeated shifting vibration; 2. Galvanized layer damage causing rust; 3. Improper bending during installation leading to fracture.

1. Bend at 45° during installation (not over-bend); 2. Inspect galvanized layer weekly and replace if damaged; 3. Replace immediately if cracks or rust appear.

1

GB97.1-85

Washer

Carbon steel (Q235) with zinc plating

1. High pressure causing deformation; 2. Vibration leading to friction wear on surfaces; 3. Mud contamination causing rust and reduced load-bearing capacity.

1. Select matching size (consistent with bolt diameter); 2. Clean surface before installation to avoid debris affecting pressure distribution; 3. Replace if deformation or rust exceeds 10% of surface area.

2

106.41.70.02

Washer

High-strength alloy steel (40Cr) for heavy load

1. Overload beyond design load; 2. Repeated impact during shifting causing fatigue; 3. Improper installation leading to edge damage.

1. Do not use for non-matching components; 2. Inspect edge for cracks weekly; 3. Ensure flat installation to avoid uneven stress.

1

106.60.71.00

Intallation Rod Assy

Alloy steel (40CrNiMoA) with precision grinding

1. Bending from improper force during shifting; 2. Lack of lubrication causing surface wear; 3. Metal fatigue from long-term continuous operation.

1. Lubricate with high-temperature grease every 3 days; 2. Avoid violent shifting to prevent bending; 3. Conduct magnetic particle testing quarterly to detect hidden cracks.

2

106.60.75.00

Shaft Yoke Assy

Alloy steel (40Cr) with heat treatment

1. Uneven force during gear shifting; 2. Vibration causing wear at the connection; 3. Mud contamination corroding the yoke joint.

1. Inspect connection tightness daily; 2. Clean yoke joint weekly to remove mud; 3. Replace if the joint clearance exceeds 0.5mm (API Spec 7K requirement).

3

106.41.70.03

Connecting Rod Assy

Alloy steel (35CrMo) for high toughness

1. Fatigue from repeated force transmission; 2. Improper alignment causing bending; 3. Lack of lubrication leading to friction wear.

1. Ensure alignment with the cylinder during installation; 2. Apply lubricant to the rod end weekly; 3. Replace if bending exceeds 0.3mm/m.

1

106.60.73.00

Shaft Box

Cast steel (ZG35) with anti-corrosion coating

1. Impact from external objects at the drilling site; 2. Mud erosion causing coating damage and rust; 3. Loose fasteners leading to vibration damage.

1. Install protective covers to avoid impact; 2. Clean surface mud daily and touch up anti-corrosion coating monthly; 3. Tighten fasteners weekly to standard torque.

2

106.60.74.00

Shaft Box

Cast steel (ZG35) with anti-corrosion coating

1. Impact from external objects at the drilling site; 2. Mud erosion causing coating damage and rust; 3. Loose fasteners leading to vibration damage.

1. Install protective covers to avoid impact; 2. Clean surface mud daily and touch up anti-corrosion coating monthly; 3. Tighten fasteners weekly to standard torque.

3

106.60.79.00

Housing Assy

Cast aluminum alloy (ZL104) for light weight and high strength

1. Collision during maintenance or equipment moving; 2. Thermal expansion and contraction causing cracks; 3. Mud contamination corroding the surface.

1. Handle with care during maintenance to avoid collision; 2. Ensure ventilation to reduce thermal stress; 3. Clean surface with neutral detergent weekly to remove mud.

1

QF526

dual position cylinder

Steel cylinder body + aluminum alloy piston + nitrile rubber seal

1. Hydraulic oil contamination causing seal wear; 2. High pressure exceeding rated value (16MPa); 3. Long-term use leading to piston wear.

1. Replace hydraulic oil every 6 months (API 46 viscosity grade); 2. Ensure system pressure does not exceed 16MPa; 3. Inspect seal for leakage weekly and replace if needed.

2

QF518-0

Support Valve

Stainless steel (304) valve body + copper alloy spool

1. Hydraulic oil impurities blocking the valve core; 2. Vibration causing valve core wear; 3. Improper operation leading to valve core jamming.

1. Install an oil filter (10μm precision) to prevent impurities; 2. Operate the valve smoothly to avoid jamming; 3. Clean the valve core monthly to remove deposits.

1

106.60.77.00

Support

Alloy steel (40Cr) with welding reinforcement

1. Uneven load causing welding seam cracking; 2. Vibration leading to base wear; 3. Mud corrosion causing rust and reduced strength.

1. Inspect welding seams weekly for cracks; 2. Ensure the base is flat and fixed tightly; 3. Apply anti-rust paint quarterly to the surface.

2

106.49.70.03

Plate

Steel plate (Q355B) with thickness 12mm

1. High pressure causing deformation; 2. Friction with other components leading to surface wear; 3. Impact from external objects causing bending.

1. Ensure the plate is aligned with mounting holes during installation; 2. Check for deformation weekly and straighten if needed; 3. Avoid placing heavy objects on the plate.

3

106.60.78.00

Support

Alloy steel (40Cr) with welding reinforcement

1. Uneven load causing welding seam cracking; 2. Vibration leading to base wear; 3. Mud corrosion causing rust and reduced strength.

1. Inspect welding seams weekly for cracks; 2. Ensure the base is flat and fixed tightly; 3. Apply anti-rust paint quarterly to the surface.

1

GB6173-86

Nirt

Carbon steel (Q235) with galvanized coating

1. Vibration causing loosening and thread wear; 2. Galvanized layer damage causing rust; 3. Over-tightening leading to thread stripping.

1. Tighten to standard torque (M12: 45-55N·m); 2. Use anti-loosening washers with installation; 3. Replace if threads are worn or rusted.

2

GB5781-86

Bolt

Carbon steel (8.8 grade) with quenching treatment

1. Vibration causing metal fatigue and fracture; 2. Overloading beyond 8.8 grade rated load; 3. Mud corrosion causing thread rust.

1. Inspect for loosening daily and retighten; 2. Do not exceed rated load (M16: 80-90N·m); 3. Clean threads weekly and apply anti-rust grease.

3

GB3289.31-82

Plug

Brass (H62) for good sealing performance

1. Improper installation leading to thread damage; 2. Mud contamination causing sealing failure; 3. Thermal expansion leading to loosening.

1. Wrap PTFE tape around threads during installation for better sealing; 2. Tighten evenly to avoid thread damage; 3. Inspect for leakage weekly.

4

106.16.70.03

Oil Reanter

Stainless steel (304) + filter screen (nylon 66)

1. Oil impurities blocking the filter screen; 2. Mud contamination causing rust; 3. Improper cleaning leading to screen damage.

1. Clean the filter screen weekly to remove impurities; 2. Replace the screen if damaged (mesh size: 80目); 3. Avoid using sharp tools during cleaning to protect the screen.

Can I use non-genuine parts to replace the Cylinder Shifter Installation 106.60.70.00 or its matching components for JC50D?

No, we strongly advise against it. All genuine parts (including 106.60.70.00) comply with API Spec 7K and GB standards, designed to fit JC50D’s 3150kN hook load and high-vibration working conditions. Non-genuine parts use inferior materials, causing shifting jams, cylinder leaks, or even component detachment—posing serious safety risks and increasing downtime. Always use genuine parts with CoC to ensure safety and compatibility.

How to judge if the dual position cylinder QF526 and Support Valve QF518-0 need to be replaced?

Check for 3 signs: 1. Shifting delay exceeds 0.5 seconds (API Spec 7K requirement); 2. Hydraulic oil leakage from the cylinder or valve; 3. Valve core jamming (unable to shift smoothly). Also, replace the cylinder every 2 years and the valve every 1.5 years under normal use; shorten to 1-1.2 years in high-mud environments.

What key points should I pay attention to when purchasing parts for the JC50D cylinder shifter installation?

Focus on 3 key points: 1. Part Number Matching: Verify each part number (e.g., 106.60.70.00, QF526) matches JC50D’s official list. 2. Compliance: Ensure parts meet API Spec 7K and corresponding GB standards (e.g., GB882-86 for pin rolls) with CoC. 3. Material: Confirm core parts (shafts, cylinders) use alloy steel, and seals use oil-resistant rubber—avoid parts with unknown materials.