ZJ40 Truck-mounted Drilling Rig Mast Parts (Part No.: Z04000000491AA)

1

Mast lower section

Z04010000009AA

High-strength alloy steel (Q355B), welded per API 4F, shot-blasted for anti-corrosion

1. Structural fatigue from repeated load cycles; 2. Weld wear from vibration during truck transport; 3. Corrosion from environmental exposure.

1. Inspect welds quarterly for cracks per API 4F standards; 2. Secure properly during transport to reduce vibration; 3. Apply anti-corrosion coating annually.

2

Mast upper section

Z04020000018AA

High-strength alloy steel (Q355B), API 4F compliant, heat-treated for rigidity

1. Same as mast lower section; 2. Stress concentration at joint connections; 3. Impact damage during mast raising/lowering.

1. Check joint fasteners before each use; 2. Ensure smooth mast deployment to avoid impact; 3. Limit overload to rated capacity (per OE specs).

3

Crown block assembly

Z04120000011AA

Alloy steel sheaves, stainless steel (304) axles, sealed bearings, API 7K compliant

1. Sheave groove wear from drilling line friction; 2. Bearing damage from contamination; 3. Axle corrosion from moisture.

1. Lubricate bearings every 100 operating hours; 2. Inspect sheave grooves for wear monthly; 3. Clean and seal to prevent debris ingress.

4

Crown platform

Z04130000011AA

Alloy steel (Q235B) plate, reinforced with structural ribs, anti-slip surface

1. Wear from personnel/tool movement; 2. Corrosion from rain or drilling fluid; 3. Impact damage from falling tools.

1. Inspect anti-slip surface for wear; 2. Keep platform free of fluid/debris; 3. Use tool lanyards to prevent falls onto the platform.

5

Mast base

Z04150000017AA

Heavy-duty alloy steel (Q355B), forged base plates, API 4F load-bearing certified

1. Wear from contact with rig foundation; 2. Stress fatigue from uneven load distribution; 3. Corrosion from ground moisture.

1. Level mast foundation before deployment; 2. Inspect base for deformation quarterly; 3. Use corrosion-resistant pads between base and ground.

6

Racking board assembly

Z04160000156AA

Alloy steel (Q355B), modular racking arms, anti-wear contact surfaces

1. Wear from drilling pipe contact; 2. Bending from overloading pipe storage; 3. Corrosion from environmental exposure.

1. Do not exceed rated pipe storage capacity; 2. Inspect racking arms for bending; 3. Apply anti-wear coating to contact surfaces annually.

1

Standpipe assembly

Z04020000154AA

Carbon steel (20#) pipe, FKM seals, API 5L compliant

1. Seal wear from high-pressure drilling fluid; 2. Pipe corrosion from fluid contact; 3. Vibration-induced joint loosening.

1. Replace seals every 300 operating hours; 2. Flush pipe after use to remove debris; 3. Tighten joints before each drilling cycle.

2

Guyline assembly

P6300117AA

High-strength steel cable (6x19 IWRC), galvanized for corrosion resistance

1. Cable fatigue from repeated tension cycles; 2. Corrosion from moisture/salt; 3. Wear at connection points.

1. Inspect for fraying before each use; 2. Adjust tension evenly per OE specs; 3. Replace galvanized coating if damaged.

3

Mast foundation

P6300116AA

Reinforced concrete composite base, steel reinforcement bars, anti-settling design

1. Settling from uneven ground; 2. Crack formation from dynamic loads; 3. Erosion from water or drilling fluid.

1. Prepare level, compact ground before placement; 2. Inspect for cracks quarterly; 3. Seal cracks promptly to prevent water ingress.

4

Front support assembly (with load guyline regulator)

4315203015

Alloy steel (Q355B) support arms, precision regulator mechanism, anti-corrosion coating

1. Regulator wear from repeated adjustments; 2. Bending from uneven load; 3. Corrosion of moving parts.

1. Calibrate regulator monthly; 2. Apply lubricant to moving parts; 3. Inspect support arms for deformation before use.

5

Cathead cylinder unit

Z04210000054AA

Steel cylinder, FKM hydraulic seals, chrome-plated piston rod

1. Seal wear from hydraulic fluid contamination; 2. Piston rod scoring from debris; 3. Cylinder corrosion from moisture.

1. Use clean hydraulic fluid (match OE specs); 2. Clean piston rod before retraction; 3. Replace seals annually or if leaks occur.

6

API nameplate, mast

Z04230000010AA

Stainless steel (304) plate, etched markings, weather-resistant coating

1. Fading of markings from UV exposure; 2. Corrosion from harsh environments; 3. Physical damage from impact.

1. Clean nameplate regularly; 2. Protect from direct impact; 3. Replace if markings are unreadable (API compliance requirement).

7

Centralizer, telescoping cylinder

Z04240000073AA

Alloy steel centralizer sleeve, chrome-plated cylinder rod, FKM seals

1. Sleeve wear from telescoping movement; 2. Seal damage from debris; 3. Rod corrosion from environmental exposure.

1. Lubricate telescoping parts before deployment; 2. Clean sleeve and rod after use; 3. Inspect for alignment before operation.

8

Mast inspection board

Z15010000154AA

Aluminum alloy plate, anti-slip surface, weather-resistant

1. Wear from personnel access; 2. Corrosion from moisture; 3. Damage from tool drops.

1. Inspect before each maintenance session; 2. Keep clean and dry; 3. Secure properly to prevent accidental dislodgement.

9

Mast support

Z04170000038AA

Alloy steel (Q355B) support brackets, welded reinforcement, anti-corrosion coating

1. Weld fatigue from vibration; 2. Bending from overload; 3. Corrosion from environmental exposure.

1. Inspect welds quarterly; 2. Do not exceed rated load; 3. Touch up anti-corrosion coating as needed.

1

Rivet 3X15

Z04180000007AA

High-tensile steel (10B21), heat-treated, zinc-plated for corrosion resistance

1. Shear failure from vibration; 2. Corrosion-induced weakening; 3. Improper installation leading to uneven stress.

1. Install per OE torque specifications; 2. Inspect for loosening monthly; 3. Replace corroded or damaged rivets immediately.

Are these parts exclusive to the ZJ40 truck-mounted drilling rig?

Yes, all parts are engineered for the ZJ40 truck-mounted drilling rig and match the mast assembly Part No.: Z04000000491AA. They comply with OE specifications to ensure perfect fit and compatibility, meeting API 4F safety standards.

How often should crown block assembly bearings be lubricated?

Lubricate crown block assembly (Z04120000011AA) bearings every 100 operating hours. For harsh or dusty environments, shorten the interval to 75 hours to prevent debris-induced damage and extend bearing life.

What is the API standard requirement for mast weld inspections?

Per API 4F, mast welds (on lower/upper sections, supports) must be inspected quarterly for cracks or fatigue. Any damaged welds must be repaired by certified technicians and re-inspected before the rig returns to service to ensure structural integrity.