Use the Titan AirCoat 423 Automatic Filter, Lubricator, Regulator Assembly exploded diagram to identify the regulator body, cap, spring, filter element, regulator stem, O-rings, filter bowl, seals, body connector, lubricator control body, lubricator bowl, and repair kits.

14 Diagram Callouts

Identify regulator, filter, connector, lubricator, bowl, seal, cap, and spring components.

Two Verified Repair Kits

Titan 0533928 and 0533930 cover regulator-relief and connector O-ring service.

Air-Preparation Diagnosis

Separate filtration, moisture-removal, pressure-regulation, leakage, and lubrication faults.

Complete Service Planning

Inspect bowls, seals, connector O-rings, filter media, regulator parts, and lubricator controls together.

Assembly Overview

How the AirCoat 423 Air-Preparation Assembly Works

The Titan AirCoat 423 Automatic Filter, Lubricator, Regulator Assembly prepares compressed air before it reaches the pneumatic motor and control circuits. It filters debris, separates moisture, regulates incoming pressure, and meters AirCare lubrication into the downstream air stream.

Titan 0533125 is the air-regulator body. Its control stack includes Titan 0533555 cap, 0533556 spring, 0533558 regulator stem, and two Titan 0533559 O-rings. Together, these parts set and stabilize incoming air pressure.

Titan 0533557 is the filter element installed inside Titan 0533560 filter bowl. The element captures compressor-borne debris while the bowl collects separated moisture. Titan 0533561 seals the connections between the regulator, connector body, and lubricator sections.

Titan 0533129 body connector joins the regulator/filter section to the lubricator section and includes diagram items 10 and 11. Titan 0533563 is the lubricator control body, and Titan 0533564 is the lubricator bowl that stores AirCare.

Titan 0533928 is the regulator-relieving repair kit. Titan 0533930 is the body-connector O-ring kit and contains ten replacement O-rings. These kits do not replace the filter element, bowls, spring, stem, connector body, or lubricator control body.

The lubricator should normally deliver about one drop of AirCare per minute. Humid conditions that promote icing may require a higher injection rate. Too little lubrication accelerates motor wear, while excessive lubrication can contaminate the air path.

Main Functions

Functions Supported by the Assembly

Filters debris from compressor-supplied air.
Separates moisture before air reaches the motor.
Regulates incoming pressure through the spring and stem system.
Meters AirCare into the downstream air stream.
Seals and joins the regulator, filter, and lubricator sections.

Service Applications

When Technicians Use This Assembly Page

Correcting unstable incoming-air regulation.
Replacing a contaminated filter element.
Repairing leakage at connector or bowl seals.
Replacing cracked filter or lubricator bowls.
Restoring automatic lubrication to the air motor.

Troubleshooting & Maintenance

AirCoat 423 Filter, Lubricator, Regulator Troubleshooting

Inspect compressor output, inlet-hose condition, and upper-shroud tubing before disassembling this assembly.

Operating symptom	Areas to inspect	Recommended action
Incoming pressure is unstable	0533125 body, 0533555 cap, 0533556 spring, 0533558 stem, 0533559 O-rings, and gauge	Inspect the regulator stack and use 0533928 where its covered relieving components are worn.
Airflow is restricted	0533557 filter element, 0533560 bowl, compressor hose, inlet fitting, and moisture accumulation	Replace the restricted filter element and drain collected moisture.
Air leaks between assembly bodies	0533561 seals, 0533129 connector body, and connector O-rings	Relieve pressure and use 0533930 when the connector O-rings are damaged.
Air motor receives too little lubrication	0533563 control body, 0533564 bowl, AirCare level, adjustment, tubing, and airflow	Refill with the specified lubricant and adjust while observing drop flow.
Excess oil enters the air motor	Lubricator adjustment, control body, bowl level, and downstream tubing	Reduce the injection rate and verify approximately one drop per minute.
Bowl is cracked, cloudy, or leaking	0533560 filter bowl, 0533564 lubricator bowl, O-rings, seals, and impact damage	Replace the affected pressure-containing bowl and seals before operation.

Major Replacement Components

High-Value AirCoat 423 Air-Preparation Parts

These parts and kits are identified for the AirCoat 423 assembly. Confirm current availability at each destination.

REGULATOR REPAIR

Titan 0533928 Regulator Relieving Repair Kit

Service kit for the AirCoat 423 relieving regulator section.

View Replacement Part →

CONNECTOR SEALS

Titan 0533930 Body Connector O-Ring Kit

Ten-piece connector O-ring kit for sealing joined assembly bodies.

View Replacement Part →

FILTER MEDIA

Titan 0533557 Filter Element

Replaceable element that removes debris from incoming compressed air.

View Replacement Part →

FILTER BOWL

Titan 0533560 Filter Bowl

Bowl that houses the filter element and collects separated moisture.

View Replacement Part →

BODY CONNECTOR

Titan 0533129 Body Connector Assembly

Connector body joining the regulator/filter section to the lubricator.

View Replacement Part →

LUBRICATOR BOWL

Titan 0533564 Lubricator Bowl

Reservoir bowl that holds AirCare for automatic lubrication.

View Replacement Part →

Parts Selection Guide

How to Find the Correct Air-Preparation Part

STEP 1

Identify the failed function

Separate pressure, filtration, leakage, moisture, and lubrication faults.

STEP 2

Locate the section

Determine whether the fault is in the regulator, connector, filter, or lubricator.

STEP 3

Check kit coverage

Use 0533928 or 0533930 only when the failed parts match the kit purpose.

STEP 4

Inspect connected parts

Check bowls, seals, connector, element, stem, spring, and controls together.

Preventive Care

Maintenance Practices That Protect the Assembly

Relieve compressed-air pressure before removing bowls or regulator parts.
Inspect and clean the air filter after each use in demanding conditions.
Drain collected moisture from the filter bowl.
Check bowl condition and seals before repressurizing.
Maintain the AirCare level and observe the drop rate.
Increase lubrication slightly during humid conditions where icing may occur.

Complete Repair Planning

Build a Complete AirCoat 423 Air-Preparation Repair Plan

For pressure-control faults, inspect the regulator body, cap, spring, stem, O-rings, gauge, and upstream air supply. A repair kit will not correct a cracked body, damaged bowl, or restricted filter element.

For leakage or lubrication faults, inspect the body connector, connector O-rings, seals, bowls, lubricator control body, drain tube, and upper-shroud air lines together.

Fast Parts Navigation

Continue Through the AirCoat 423 Parts Diagrams

Use these verified internal routes when the fault belongs to another AirCoat 423 assembly.

Airless Sprayer Parts Main Assembly Motor/Pump Assembly Upper Shroud Assembly Air Motor Assembly Fluid Pump Assembly High-Pressure Filter High-Pressure Fluid Regulator Cart Assembly

Frequently Asked Questions

Titan AirCoat 423 Filter, Lubricator, Regulator FAQs

Use these answers to identify components, repair kits, and maintenance priorities.

What does the assembly include?+

It includes the regulator body, cap, spring, filter element, stem, O-rings, filter bowl, seals, body connector, lubricator control body, and lubricator bowl.

Which regulator body is used?+

Titan 0533125 is the AirCoat 423 air-regulator body.

Which filter element fits?+

Titan 0533557 is the AirCoat 423 filter element.

Which part is the filter bowl?+

Titan 0533560 is the filter bowl.

Which seals are used?+

Titan 0533559 is the regulator O-ring and Titan 0533561 is the assembly seal.

Which part joins the sections?+

Titan 0533129 is the body connector and includes items 10 and 11.

Which parts form the lubricator?+

Titan 0533563 is the control body and Titan 0533564 is the bowl.

What is Titan 0533928?+

It is the AirCoat 423 regulator-relieving repair kit.

What is Titan 0533930?+

It is the ten-piece body-connector O-ring kit.

What safety steps are required?+

Relieve all air and fluid pressure, disconnect the compressor, secure the sprayer, and verify zero pressure before service.

Find the Correct Replacement Part

Match the Air-Preparation Callout Before Ordering

Identify whether the fault involves filtration, regulation, leakage, moisture removal, or lubrication, then match the numbered callout and kit coverage.

Search using:

Titan part number
Assembly callout
0533928 or 0533930
Air-system symptom
Component name

Related Titan AirCoat 423 Filter, Lubricator, Regulator Searches

AirCoat 423 Airless Sprayer Parts AirCoat 423 Main Assembly AirCoat 423 Motor/Pump Assembly AirCoat 423 Upper Shroud Assembly AirCoat 423 Air Motor Assembly AirCoat 423 Fluid Pump Assembly AirCoat 423 High-Pressure Filter AirCoat 423 High-Pressure Fluid Regulator AirCoat 423 Cart Assembly