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Jun-Air 87R-4P - Service Manual

Jun-Air 87R-4P
23 pages
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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.
WWW.JUN-AIR.COM
ISO 9001 CERTIFIED
87R-4P Compressed
Air System
Operation & Maintenance Manual

Table of Contents

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.
  • T
    Timothy BurnsAug 26, 2025
    How to fix unusual noise in Jun-Air 87R-4P?
    • K
      Kayla Murphy DDSAug 26, 2025
      If your Jun-Air Air Compressor is making unusual or excessive noise, consider these potential causes: First, ensure the intake filter is seated correctly; remove and replace the filter if it's clogged or dirty, and make sure the filter chamber is clean. If air leaks are suspected, close the storage-tank outlet valve and check all fittings for leaks. For issues like a noisy compressor or a loose/broken cooling fan, it is recommended to contact an authorized dealer for service.
  • S
    Steven BrownNov 17, 2025
    Why Jun-Air 87R-4P tank pressure does not reach 8 bar?
    • T
      Tina WilliamsNov 17, 2025
      If your Jun-Air Air Compressor cycles but the tank pressure doesn't reach 8 bar (116 psi), several factors could be responsible. Start by replacing the intake filter(s) if it is clogged or dirty. Additionally, close the storage-tank outlet valve and check all fittings for leaks. If a leak is detected, contact an authorized dealer for service. If the issue persists, there may be a leak in the device air system. To check this, with the compressor system connected to the device-air system and the regulator valve open, run the compressor until the cut-out pressure is reached and the compressor is switched off, and then close the regulator valve. After five minutes, open the regulator valve and observe the system pressure drop. If the pressure drop exceeds 0.5 bar (7.5 psi), there is a leak in ...

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.

Jun-Air 87R-4P Specifications

General IconGeneral
BrandJun-Air
Model87R-4P
CategoryAir Compressor
LanguageEnglish

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