1. Product Introduction
This premium lineup of GUA007 compatible spare parts is precision engineered to fit dedicated hydraulic and pneumatic plunger/piston assemblies, fully matching the OEM specifications of GUA007, GUA0073, GUA0074, GUA0075, GUA0076, GUA0077, and GUA0078 series equipment. Every component is manufactured to strict dimensional tolerances and material standards, cross-referenced to original manufacturing part numbers for seamless drop-in installation. Covering critical sealing elements, plunger assemblies, bushings, O-rings, springs, and fasteners, these parts resolve the most common field failures: fluid/air leakage, premature plunger wear, seal degradation, and component seizing—issues that cause costly unplanned downtime and performance loss in hydraulic and pneumatic systems.
2. Core Purpose
Core Purpose: These GUA007 series spare parts are designed to restore full operational integrity to worn or damaged hydraulic/pneumatic plunger and valve assemblies, extend equipment service life, and serve as a standardized procurement and technical reference for both emergency repairs and scheduled preventive maintenance. They ensure leak-free operation, consistent pressure retention, and smooth mechanical movement for GUA007 series equipment.
3. Key Functional Specifications
- Sealing Performance: EGO sealing elements (13x24x28) and V-type packing/seal rings withstand operating pressures up to 21MPa (3000 PSI), with zero leakage rates under continuous cyclic operation.
- O-Ring Durability: GB1235-76 standard O-rings (32×3.1, 50×3.1, 38×3.1) offer 3000+ hours of service life, resisting oil, hydraulic fluid, and compressed air degradation.
- Mechanical Component Strength: Plungers, plunger rods, and bushings feature precision ground surfaces with roughness ≤Ra0.8μm, minimizing friction and wear; commutation springs maintain elastic force retention after 100,000+ compression cycles.
- Fastener Reliability: Nuts and setting nuts meet industrial grade 8.8 strength standards, resisting loosening under high vibration and pressure cycling.
4. Structural & Material Features
All GUA007 series parts use industrial-grade, field-proven materials optimized for hydraulic/pneumatic environments: sealing elements and O-rings utilize oil-resistant nitrile rubber (NBR) for flexibility and chemical compatibility; plungers and plunger rods are crafted from hardened carbon steel with anti-corrosion, anti-wear surface treatment; bushings use wear-resistant bronze alloy for low-friction operation; springs are made from high-carbon spring steel with heat treatment for consistent elasticity; fasteners are forged from high-strength alloy steel for torque retention. Each part matches OEM dimensional specs exactly, requiring no modifications for proper fit and alignment.
5. Applicable Operating Conditions
These parts are optimized for hydraulic and pneumatic plunger/valve systems equipped with GUA007 series components, performing reliably in ambient temperatures ranging from -10°C to 80°C (14°F to 176°F), exposure to mineral-based hydraulic fluids, lubricating oils, and compressed air, continuous cyclic operation, and moderate to high vibration industrial settings. They are suitable for industrial machinery, drilling auxiliary equipment, and hydraulic power units.
6. Maintenance & Care Recommendations
- Scheduled Inspections: Check sealing elements and O-rings for cracks/ hardening every 150 operating hours; inspect plunger rods and bushings for wear/scoring every 200 hours; test spring tension and fastener tightness monthly.
- Lubrication Protocol: Apply low-temperature, high-pressure hydraulic lubricant to plunger rods and bushings during installation and every 300 hours to reduce friction; avoid mixing incompatible lubricants that degrade seals.
- Wear Replacement Thresholds: Replace sealing elements and O-rings at the first sign of leakage or hardening; swap plunger rods when surface scoring exceeds 0.01mm; replace springs when tension loss exceeds 10%.
- Installation Standards: Lubricate seals prior to installation to prevent tearing; torque nuts and setting nuts to specified values to avoid over-tightening; align plunger rods and bushings to prevent side loading.
- Storage Guidelines: Store rubber sealing components in cool, dark, dry areas away from direct sunlight and ozone to prevent premature aging; keep metal parts coated with anti-rust oil during long-term storage.
We supply the following spare parts:
| S/N: | UOM | Manufacturer | MFG. P/N | DESCRIPTION |
| 1 | SET | GUA0073 | 13x24x28 | EGO Sealing Element |
| 2 | EA | GUA0073 | QB20-07 | Plunger Bushing |
| 3 | EA | GUA0073 | 150QMD-00-30 | Nut |
| 4 | EA | GUA0073 | QB 20-02 | Setting Nut |
| 5 | EA | GUA0073 | GB1235-76-32×3.1 | O-ring |
| 6 | EA | GUA0073 | QB20-01 | Plunger |
| 7 | EA | GUA0073 | 150QMD-00-19 | Piston Rood |
| 8 | EA | GUA0073 | 150QMD-00-22 | Commutation Spring |
| 9 | EA | GUA0073 | 150QMD-00-28 | Valve Trip Collar |
| 10 | EA | GUA0073 | QB19-15 | Piston Nut |
| 11 | EA | GUA0073 | 150QMD-00-12 | Bushing |
| 12 | EA | GUA0073 | GB1235-76-50×3.1 | O -ring |
| 13 | EA | GUA0073 | 150QMD-00-04 | Air Valve |
| 14 | EA | GUA0073 | QM19-35 193×8 | O -ring |
| 15 | SET | GUA0074 | QB6-03 | V -type packing |
| 16 | EA | GUA0075 | QB6-11 | Spring pedestal |
| 17 | SET | GUA0076 | QB6-09 | V- Type seal Ring |
| 18 | EA | GUA0077 | QB6-01 | Plunger rood |
| 19 | EA | GUA0078 | 150QMD-00-38 | O ring (38x 3.1) |
Field Fault Repair Cases (GUA007 Series Equipment)
Case 1: Hydraulic Plunger Seal Leakage
A GUA007 hydraulic assembly experienced severe fluid leakage, traced to a cracked EGO sealing element (13x24x28) and worn O-ring (32×3.1). Installing new OEM-matched seals and lubricating the plunger eliminated leakage and restored full pressure retention.
Case 2: Plunger Rod Binding & Wear
Plunger movement became stiff and erratic due to a worn plunger bushing (QB20-07) and scored plunger rod (QB20-01). Replacing the bushing and plunger rod restored smooth linear movement and prevented further component damage.
Case 3: Pneumatic Valve Pressure Loss
A GUA007 air valve system failed to hold pressure, caused by a faulty air valve (150QMD-00-04) and degraded O-ring (50×3.1). Swapping the air valve and O-ring resolved pressure loss and restored consistent valve operation.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully compatible with GUA007, GUA0073-GUA0078 series equipment? | Yes, every part is manufactured to match OEM part numbers and dimensional specifications for GUA007 series assemblies, ensuring direct drop-in replacement with no modifications needed. |
| What is the service life of the V-type packing (QB6-03) for GUA007 systems? | Under normal operating conditions and proper lubrication, the QB6-03 V-type packing lasts 2500–3500 operating hours, resisting wear and deformation in high-pressure cycles. |
| Do you offer complete seal sets for GUA007 plunger assemblies? | Yes, we provide full EGO sealing element sets and V-type seal ring sets, plus all matching O-rings, to support complete overhaul of GUA007 sealing systems. |
Closing Section
This curated catalog of GUA007 series spare parts serves as your definitive procurement and technical reference standard for repairing, maintaining, and overhauling GUA007, GUA0073-GUA0078 hydraulic and pneumatic equipment. Each component is clearly labeled with its OEM part number, quantity, and description to eliminate ordering errors and guarantee perfect fitment for your plunger, valve, and sealing assemblies.
Invest in these OEM-compatible GUA007 series spare parts to protect your equipment investment, reduce long-term repair costs, and keep your hydraulic/pneumatic systems operating at peak performance. Secure the exact components you need for reliable, long-lasting repairs and routine maintenance.
