Overview
The Trico 30103 #3 closed system oiler is a precision lubricant delivery component manufactured by Trico Corporation. The Closed System Opto-Matic Oiler is designed for all types of equipment where a constant level in an oil housing must be maintained. A 1/8″ NPT port is provided for a vent line back to the housing to allow pressure balancing between the oiler and the housing.
Key Features
- One piece glass reservoir ensures proper constant level function, with no possibility of air leakage that would cause overfilling of the housing.
- The oiler uses a pressure-balancing line to exchange air within the lubricating sump, which closes the oiler from the surrounding environment protecting the oil against contamination.
- Control the oil level externally through the adjustable collar.
- The Red-Collar Oiler is designed without slots, but with seven independent holes, each identified by a letter designation A through G, which allows SOP writers to identify a specific lettered hole to adjust the oiler to, and provides a positive stop when putting the reservoir assembly back on after filling.
Technical Specifications
A 1/8″ NPT port is provided for a vent line back to the housing. The unit features an adjustable collar design for external level control. These oilers are defined by the color of the adjustable collar on the oiler. Connection ports support both side and bottom line routing for flexible installation.
Typical Applications
Closed System Oilers are designed for all types of equipment where a constant level in an oil housing must be maintained. Common applications include centrifugal pumps, gearboxes, bearing housings, and industrial machinery operating in contaminated or high-humidity environments. Improper oil level, low or high, is one of the leading causes of equipment failures, and 70 percent of all premature machine failures can be attributed to contamination.
Compatibility & Replacements
Compatible With
- Trico Opto-Matic closed system lubrication networks
- Equipment requiring API 610 compliance
- Standard bearing housings and oil sumps with 1/8″ NPT vent ports
- Machinery requiring sealed, pressure-balanced oil delivery
Replaces / Drop-In Replacement For
Verify specific model interchangeability with your system integrator, as Trico offers multiple collar options (red-collar, blue-collar, zinc-plated) for different application requirements.
Works With
- Pressure-balancing vent lines (1/8″ NPT)
- Side and bottom oil delivery connections
- Wire guard protection accessories
- Trico constant-level oiler kits and contamination control components














