66661A
R134a 2-WAY BRASS MANIFOLD GAUGE SET WITH 3-60″ CONVERSION HOSES AND ECONOMY COUPLERS

Product Description

The redesigned Mastercool heavy-duty 2-way brass manifold is engineered for everyday automotive and HVAC/R service. Machined from heavy-duty forged brass to the tightest tolerances in its class, this manifold has been upgraded with the features that matter most when you’re in the field. a completely overhauled internal sealing system. By optimizing gland geometry, tightening bore tolerances, and refining the free-floating piston design, we have eliminated valve play to deliver an ultra-reliable, leak-free seal technicians can rely on year after year.

Built for the field, it also features upgraded, ergonomic brass-reinforced 5-lobe control knobs for a solid grip, alongside a reinforced hanger and hose bracket retention nut for long-term assembly stability. This manifold delivers the straightforward precision, durability, and reliability you need to get the job done right.

• Advanced Piston & Sealing Performance: Features optimized gland geometry, improved bore tolerance control, and an updated piston slot design to eliminate valve play and ensure a consistent, leak-free seal—the ultimate long-term reliability upgrade for active technicians.
• Heavy-Duty Forged Brass Body: Machined to tight tolerances for superior strength and reliable performance in demanding field environments.
• Ergonomic 5-Lobe Phenolic Knobs: Contoured shape with brass-reinforced inserts ensures a secure, comfortable grip and smooth valve rotation, even when working with gloves or oily hands.
• Reinforced Hanger & Hose Bracket: Upgraded retention hardware keeps the hanger hook and hose bracket assembly securely locked in place, preventing shifting or loosening over time.
• Anti-Flutter Gauges: Silicone-dampened anti-flutter technology stabilizes needle movement for accurate, confident readings; Housed in a rugged black metal casing with field-recalibration capability.
• Intuitive Color Identification: Standard red (high-side) and blue (low-side) gauge faces for quick system recognition.
• Integrated Hose Storage: Built-in hose holder keeps service hoses organized and accessible on the job

SPECIFICATIONS:

• Manifold Body with Gauges: 80103A
• Refrigerant Compatibility: R134a/R12
• Manifold Body: Heavy-duty forged brass
• Valve Type: Free-floating piston
• Gauge Diameter: 2 1/2”
• Gauge Class: 1.6
• Units: PSI / °F
• Low-Side Range: 30 inHg – 120 PSI (Retard 350 PSI) -1 – 1000 KPa
• High-Side Range: 0 – 500 PSI
• Port Connections: 1/2” ACME (3 ports)
• Control Knobs: 5-lobe phenolic with brass insert
• Gauge Housing: Black metal
• Hose Storage: Integrated hanger with retention nut
• Gauges: 85350 / 85500
• Optional Gauge Guards: Add “-G” suffix
• Replacement O-Rings: 34215A
• Replacement Seal & Seat: 34216A

66661A:
R134a 2-Way Brass Manifold Gauge Set (2 1/2” gauges) includes (3) 60” hoses (yellow hose (1/2” ACME-F with auto-shut-off valve), red and blue conversion
hoses (1/2” ACME-F x 1/4”) and R134a economy couplers