Mastercool 90375 Standard Oil Injector

Professional standard oil injector for adding refrigerant oil to A/C and refrigeration systems. Allows precise measurement and injection of oil into systems. Essential tool for maintaining proper oil levels during refrigerant service, compressor replacement, or system repairs. Durable construction for reliable performance.

Key Features:

• Standard oil injector design
• Precise oil measurement and injection
• Easy to use and refill
• Graduated markings for accurate dosing
• Connects to service ports
• Durable construction
• Professional-grade quality

Specifications:

• Model: 90375
• Type: Standard oil injector
• Application: Refrigerant oil injection
• Connection: Standard service port fitting
• Weight: 10 kg (shipping weight)
• SKU: 90375
• HS Code: 84189910

Related Injectors:

• 53123-A — Refillable Dye Piston-Type Injector 60ml R134a + 1/4"
• 53123-YF — Refillable Piston-Type Injector 60ml with R1234yf Coupler

Replacement Parts:

• 53223-001D — Hose Assembly for 53123 Aluminium Injector

Applications:

• Adding oil during refrigerant service
• Oil replacement after compressor change
• Maintaining proper oil levels
• System repairs requiring oil addition
• HVAC/R service work
• Compressor lubrication maintenance

Why Proper Oil Levels Matter:

Refrigerant oil serves two critical functions in HVAC/R systems:

• Compressor Lubrication – Prevents wear and extends compressor life
• Refrigerant Miscibility – Oil circulates with refrigerant throughout the system

Insufficient oil leads to compressor failure, whilst too much oil reduces system efficiency and cooling capacity. An oil injector ensures you add exactly the right amount.

When to Add Oil:

• After Refrigerant Recovery – Some oil is removed with refrigerant
• Compressor Replacement – New compressors require specific oil charges
• System Repairs – Oil may be lost during component replacement
• Leak Repairs – Oil escapes with refrigerant through leaks
• System Conversions – Different refrigerants require different oils

How to Use:

1. Determine correct oil type for the refrigerant (POE, PAG, mineral, etc.)
2. Calculate required oil quantity based on service performed
3. Fill injector with appropriate refrigerant oil
4. Connect injector to system service port
5. Inject measured amount of oil into system
6. Record oil quantity added for service records

Benefits:

• Precise Measurement – Graduated markings ensure accurate oil dosing
• Prevents Compressor Damage – Correct oil levels protect compressor
• Professional Service – Demonstrates proper service procedures
• Easy to Use – Simple operation for quick oil addition
• Refillable – Use with any refrigerant oil type
• Durable Construction – Built for daily professional use

Maintenance:

• Clean injector thoroughly between different oil types
• Store in clean, dry location
• Inspect seals and connections regularly
• Replace worn seals to prevent leaks
• Keep graduated markings visible and clean

Professional Quality: Mastercool oil injectors are built to professional standards for accurate, reliable oil injection in demanding HVAC/R service environments. Essential tool for maintaining proper oil levels and protecting compressor longevity.