Jun-Air 87R-4P Service Manual

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Part No. 6190900 (Rev B)

® Registered Trademark/™ Trademark of JUN-AIR Inc. ©Copyright 2017 JUN-AIR Manufacturing Inc. All Rights Reserved.

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ISO 9001 CERTIFIED

87R-4P Compressed

Air System

Operation & Maintenance Manual

Questions and Answers:

A
Alexis GriffinAug 3, 2025
Why Jun-Air 87R-4P does not start?
- A
  amyholderAug 3, 2025
  If your Jun-Air Air Compressor doesn't start, there could be several reasons. First, check the circuit breaker at the main power source to ensure there is electrical power. Next, verify the power cord is properly connected at both ends. Also, make sure the system power switch is in the 'on' position. If these steps don't resolve the issue, the fuse might be blown or damaged and needs checking in the electrical inlet. If the power switch is defective, it will need replacement by an authorized dealer.
E
Erin TapiaAug 11, 2025
What to do if circuit breaker trips when Jun-Air Air Compressor starts?
- R
  Richard FuentesAug 11, 2025
  If the circuit breaker trips when your Jun-Air Air Compressor attempts to start, it could be due to several reasons. The voltage might be too low; the compressor requires a minimum of 103 V/207 V, and a buck-boost transformer must be installed if the voltage is below this. Also, the power supply cable might be too small; check the SITE REQUIREMENTS for the correct current draw and select the appropriate wire gauge size. For other potential issues, such as a solenoid valve not opening or loose electrical connections, contact an authorized dealer for service.

Jun-Air 87R-4P Specifications

General

Brand	Jun-Air
Model	87R-4P
Category	Air Compressor
Language	English

Summary

Declaration of Conformity

Specifications

INSTALLATION AND OPERATION

Pre-Installation Safety Warnings

Covers critical safety warnings before installing the equipment.

Personal Safety

Outlines dangers, cautions, and warnings related to personal safety during operation.

Installation Warnings and Hazards

Highlights installation warnings for incline, altitude, relief valve, and electrical shock.

Electrical Safety and Grounding

Details electrical safety measures, grounding requirements, and cord inspection.

Site Requirements

Electrical and Placement Requirements

Pneumatic Connection Guidelines

System Checks and Operation

System Checks and Tests

Operating the Compressor

MAINTENANCE

General Maintenance Practices

Maintenance Safety Precautions

Critical safety warnings to follow during maintenance procedures.

Pressure-Switch Adjustment

Adjustment Procedure and Safety

Step-by-step guide for adjusting pressure switch settings and related safety.

TROUBLESHOOTING

Common Problems and Solutions

Identifies typical issues and provides steps for resolution.

Compressor Issues and Leaks

Troubleshooting compressor cycling, pressure buildup, and system leaks.

WARRANTY POLICY

Warranty Terms and Coverage

Details the warranty period, exclusions, and claims process.

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