EasyManua.ls Logo

Rolair VT25BIG - User Manual

Rolair VT25BIG
47 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
PORTABLE AIR COMPRESSOR
OWNER’S MANUAL
MANUEL D’INSTRUCTION FRANÇAIS – PAGE 15
MANUAL DE INSTRUCCIONES ESPAÑOLES – PÁGINA 30
Thank you for purchasing a ROLAIR!
If after reading this manual you have any questions whatsoever on the proper installation, operation, or
maintenance of your air compressor please feel free to contact our Customer Service Department at 1-800-
310-3573.
We would love to hear from you!
MODEL: VT25BIG
SERIAL NUMBER: __________________
606 South Lake Street > P.O. Box 346 > Hustisford, WI 53034-0346 > 920.349.3281 > fax 920.349.8861 > www.rolair.com

Table of Contents

Questions and Answers

  • W
    William MasonJul 26, 2025
    Why is my Rolair VT25BIG Air Compressor pump slow to build tank pressure?
    • E
      Eric HallJul 27, 2025
      A slow-building tank pressure in your Rolair Air Compressor can stem from several issues: * A loose or slipping belt: adjust the belt tension. * Excessive leaks in the system: correct any air leaks. * A blown gasket: replace the head gaskets. * A broken reed valve: replace the reed valves. * An obstructed intake filter: clean or replace the intake element. * A leaking regulator: replace the regulator. * A defective pilot valve: replace the pilot valve.
  • W
    woodmariahJul 31, 2025
    What to do if my Rolair VT25BIG Air Compressor motor trips the overload/reset button?
    • R
      rojasadamJul 31, 2025
      If the motor trips the overload/reset button, it might be due to several reasons: * The motor is starting and stopping too often: consider installing a constant speed or dual control kit. * The overload is defective or weak: replace the overload. * Improper gauge of extension cord: use longer lengths of air hose or a heavier cord. * Stripped or poorly tightened motor thru bolts: retighten or replace the stripped thru bolts. * Cracks in the end bell or housing: take the unit in for service.
  • P
    patriciamyersAug 4, 2025
    What to do if my Rolair VT25BIG electric motor is dead and won't hum?
    • M
      Melissa FlowersAug 4, 2025
      If your Rolair Air Compressor's electric motor is dead and doesn't even hum, check for these potential causes: * The thermal overload tripped: locate and push the reset button. * The reset is physically broken: replace the overload/reset. * Loose motor leads or electrical connections: locate and correct any loose electrical connections. * A short in the power cord: replace the power cord.
  • M
    Michael GreeneAug 8, 2025
    Why does my Rolair VT25BIG Air Compressor have excessive oil consumption?
    • D
      dylanrobinsonAug 8, 2025
      Excessive oil consumption in your Rolair Air Compressor might be caused by: * Too much oil in the crankcase: drain it to the proper level. * Improper weight of oil: replace it with the proper oil. * An obstructed crankcase vent: replace the dipstick or oil fill plug/crankcase vent. * Dirty or plugged intake filter: clean or replace the intake filter. * Worn piston rings or a scored cylinder: take the unit in for service.
  • M
    Matthew JamesAug 12, 2025
    What to do if my Rolair VT25BIG Air Compressor is overheating?
    • A
      Anthony BaileyAug 12, 2025
      If your Rolair Air Compressor is overheating, consider the following: * Poor ventilation: relocate the compressor to a better-ventilated area. * Improper pump rotation: contact an electrician. * Internal pump problem: take the unit in for service.
  • S
    Shannon YatesAug 17, 2025
    Why is my Rolair VT25BIG gasoline engine hard to start?
    • M
      monica81Aug 17, 2025
      If the gasoline engine of your Rolair Air Compressor is hard to start, it could be due to: * A fouled, incorrect, or improperly gapped spark plug: install the proper spark plug after gapping it to factory specifications. * Improper engine oil level: fill to the top of the threads for the oil plug. * Improper weight of pump or engine oil: change to the proper weight of oil for the operating temperature. * Improper or old gas: take the unit in for service.
  • K
    Kevin RiveraAug 21, 2025
    What causes a knocking noise in my Rolair VT25BIG Air Compressor?
    • M
      Morgan DuncanAug 21, 2025
      A knocking noise in your Rolair Air Compressor could be due to: * A loose pulley or flywheel: tighten the appropriate parts. * Loose belts: adjust the belt tension. * An internal pump problem: take the unit in for service.

Summary

General Safety Warnings

Risk of Explosion or Fire

Details hazards and precautions related to fire, explosion, and flammable vapors.

Risk to Breathing (Asphyxiation)

Explains dangers of inhaling compressed air or toxic exhaust fumes.

Risk of Bursting

Covers risks associated with air tank integrity and potential explosions.

Specific Safety Hazards

Risk to Air Tanks

Explains conditions leading to tank weakening and preventative measures against explosions.

Risk of Injury During Transport or Storage

Risk of Electrical Shock

Highlights dangers of electric shock and proper grounding procedures.

Risk from Flying Objects

Risk of Hot Surfaces

Operational and Handling Safety

Risk from Moving Parts

Stresses using guards and keeping clear of belts, pulleys, and fans.

Operation and Maintenance Precautions

Risk of Unsafe Operation

Emphasizes understanding the manual, controls, and staying alert.

System Controls

Safety-Relief Valve

Manual Overload; Motor Reset

Pressure Switch

Regulator - Working Pressure

Pre-Start Checklist and Operation

Pre-Start Checklist: Level Position

Stresses the importance of maintaining a level position for the compressor.

Pre-Start Checklist: Environment & Checks

Advises on suitable environments and daily checks for oil and filters.

Specifications and Operation Details

Operation: General Warnings

Operation: Wet Conditions

Operation: Direct-Drive Electric

Maintenance and Lubrication

Maintenance Overview

Lubrication Guide

Instructions on checking and maintaining correct oil levels for the pump.

Maintenance Schedule and Troubleshooting

Maintenance Schedule

A table outlining daily, weekly, monthly, quarterly, and annual maintenance tasks.

Troubleshooting Common Problems

Identifies common issues, their causes, and recommended solutions.

Troubleshooting and Warnings

Troubleshooting Table Continued

Maintenance and Service Warnings

Rolair VT25BIG Specifications

General IconGeneral
BrandRolair
ModelVT25BIG
CategoryAir Compressor
LanguageEnglish

Related product manuals