Product Introduction
Our Twin Disc air clutch parts cover all critical wear and functional components for PO 0330 and PO 0336 models: release springs, spring guides, driving plates, center plates, diaphragms, valve assemblies, gaskets, and precision fasteners (studs, nuts, roll pins). Each component is crafted from high-grade heat-treated steel, oil-resistant elastomers, and reinforced friction materials, undergoing pressure cycle testing and hardness verification to match original Twin Disc performance specifications. Every part cross-references directly with OEM part numbers (e.g., A22708X spring, A6608 diaphragm) for drop-in installation, requiring no custom modification or specialized machining for field repairs.
Functional Capabilities
- Reliable Clutch Engagement: Precision driving plates and center plates deliver consistent torque transfer, eliminating slippage during heavy drawworks hoisting and ensuring smooth power transmission.
- Pneumatic Pressure Retention: High-elasticity diaphragms and valve assemblies maintain stable air pressure, enabling quick clutch actuation and preventing air leaks that disrupt operation.
- Stable Spring Performance: Heat-treated release springs and matching guides provide consistent clutch disengagement, reducing wear on friction surfaces and extending component life.
- Secure Fastening & Alignment: Heavy-duty studs, nuts, and roll pins keep clutch components locked in place, resisting vibration-induced loosening during rig operation.
- Leak-Proof Sealing: OEM-spec gaskets and diaphragms create airtight seals, maintaining optimal pneumatic pressure and preventing contamination from drilling dust and debris.
Structural Design Features
- OEM Exact Interchangeability: Perfect dimensional and mounting matches for Twin Disc PO 0330 and PO 0336 clutches, cutting installation labor time by 40% and eliminating fit errors.
- Wear-Resistant Materials: High-tensile steel springs, oil-resistant nitrile diaphragms, and friction-optimized driving plates built to withstand continuous heavy-duty cycling.
- Modular Replacement Design: Individual wear components and pre-matched assembly sets allow targeted repairs, reducing waste and lowering maintenance costs.
- Vibration-Dampened Construction: Precision-machined separators and plate pins minimize clutch chatter and vibration, protecting adjacent drawworks components.
Applicable Operating Conditions
These Twin Disc clutch parts are validated for harsh drilling rig environments, including:
- Gardner Denver drawworks equipped with Twin Disc PO 0330 and PO 0336 pneumatic air clutches
- Onshore land drilling rigs with continuous 24/7 hoisting operations
- High-vibration, dusty drilling site conditions
- Heavy-load drawworks cycling for drill string lifting and casing operations
- Moderate temperature fluctuations typical of onshore drilling locations
Maintenance & Service Best Practices
- Inspect clutch diaphragms (A6608, A6646) every 800 operating hours for cracks, swelling, or hardening; replace immediately to prevent air leaks and clutch failure.
- Check release springs (A22708X, A2708AD) and spring guides for fatigue or deformation every 1000 hours, replacing worn springs to ensure consistent clutch disengagement.
- Tighten release spring studs and nuts to manufacturer-specified torque values every 600 hours to prevent loosening from rig vibration.
- Inspect driving plates and center plates for friction wear every 1200 hours; replace plates if friction surface wear exceeds 1.2mm to eliminate engagement slippage.
- Lubricate plate separator pins and roll pins with API-certified dry lubricant during routine maintenance to reduce friction and seizing.
- Test valve assemblies for proper air flow and pressure regulation every 6 months, cleaning or replacing faulty valves to maintain clutch actuation speed.
- We supply the following spare parts:
| ITEM | DESCRIPTION | Code N0. | |||
| 1 | ea | #121805 – Spring, Release, (Twin Disc#A22708X) | 1221.200.Denver | ||
| 2 | ea | #5991143 – Guide, Release Spring, (Twin Disc#B136A) | 1221.200.Denver | ||
| 3 | ea | #5991150 – Driving Plate (Twin Disc#8461C) | 1221.200.Denver | ||
| 4 | ea | #5991144 – Stud, Release Spring (Twin Disc#A2991D) | 1221.200.Denver | ||
| 5 | ea | #5991154 – Nut (Twin Disc#M2060C) | 1221.200.Denver | ||
| 6 | ea | #5991155 – Plate-Center (Twin Disc#A6612) | 1221.200.Denver | ||
| 7 | ea | #M1927N- Roll Pin (Twin Disc#M1927N) | 1221.200.Denver | ||
| 8 | ea | #179377 – Diaphragm (Twin Disc#A6608) | 1221.200.Denver | ||
| 9 | ea | #170120 – Vavle Assy. (Twin Disc#XA4255) | 1221.200.Denver | ||
| 10 | ea | #5990048 – Gasket (Twin Disc#B1302) | 1221.200.Denver | ||
| 11 | ea | #119289 – Diaphragm (Twin Disc#M1980) | 1221.200.Denver | ||
| ITEM | DESCRIPTION | Code N0. | |||
| 1 | ea | #A6647 – Driving Plate (Twin Disc #PO 0336) | 1221.200.Denver | ||
| 2 | ea | #69802 – Plate, Center (Twin Disc #PO 0336) | 1221.200. Denver | ||
| 3 | ea | #M2060L – Nut, Release Spring (Twin Disc #PO 0336) | 1221.200. Denver | ||
| 4 | ea | #A2991F – Stud, Release Spring (Twin Disc # PO 0336) | 1221.200. Denver | ||
| 5 | ea | #B1836 – Pin, Plate Separator (Twin Disc # PO 0336) | 1221.200. Denver | ||
| 6 | ea | #B1402A – Separator (Twin Disc # PO 0336) | 1221.200. Denver | ||
| 7 | ea | #A2708AD – Spring, Release (Twin Disc # PO 0336) | 1221.200. Denver | ||
| 8 | ea | #M1927N – Roll Pin (Twin Disc # PO 0336) | 1221.200. Denver | ||
| 9 | ea | #A6646 – Diaphragm (Twin Disc # PO 0336) | 1221.200. Denver | ||
Field Failure Repair Case Studies
Case 1: Diaphragm Air Leak (PO 0330 Clutch)
A Gardner Denver drawworks experienced slow clutch engagement due to a cracked A6608 diaphragm causing air pressure loss. Replacing the damaged diaphragm and matching gasket restored full pneumatic pressure, eliminating engagement delays and resuming normal hoisting operations within 2 hours.
Case 2: Release Spring Fatigue (PO 0336 Clutch)
Prematurely worn A2708AD release springs caused clutch drag and inconsistent disengagement, leading to excessive heat buildup. Installing new OEM-spec springs and spring guides resolved the issue, extending clutch service intervals to 1500+ operating hours.
Case 3: Worn Driving Plate Slippage (PO 0330 Clutch)
Heavily worn 8461C driving plates caused severe clutch slippage during heavy drill string lifts, reducing hoisting power. Fitting new driving plates and aligning separator pins restored full torque transfer, eliminating downtime and ensuring safe load handling.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with both PO 0330 and PO 0336 Twin Disc clutches? | Parts are model-specific: PO 0330 components (e.g., A6608 diaphragm) fit only PO 0330 clutches, and PO 0336 parts (e.g., A6647 driving plate) fit only PO 0336 clutches, with clear OEM cross-references for easy selection. |
| What equipment do these clutch parts fit? | These components are exclusively designed for Gardner Denver drawworks equipped with Twin Disc PO 0330 and PO 0336 pneumatic air clutches, the standard OEM configuration for this drawworks model. |
| How often should clutch diaphragms be replaced? | For optimal performance, diaphragms should be replaced every 1200 operating hours, or immediately if cracks, leaks, or hardening are detected during routine inspections. |
Procurement Guidance
For drilling operators focused on maximizing Gardner Denver drawworks reliability, minimizing clutch-related downtime, and upholding API operational standards, our OEM-matched Twin Disc PO 0330 and PO 0336 clutch parts are the definitive sourcing solution. This catalog provides full transparency on part descriptions, OEM cross-references, quantities, and application details, serving as your trusted benchmark for compliant, cost-effective procurement. Whether you need emergency replacement parts for unexpected clutch failures, routine wear components for scheduled maintenance, or bulk fastener and hardware stock for ongoing rig upkeep, each component is engineered to resolve critical clutch issues and deliver long-term durability in harsh drilling conditions. Submit your detailed parts inquiry with specific Twin Disc OEM part numbers, required quantities, and clutch model (PO 0330/PO 0336) details to secure high-quality, precision-matched components tailored to your drawworks needs. Our technical team provides full compatibility verification, performance certification support, and expert
