Rolair VT20TB User Manual (English)

Questions and Answers:

C
cjohnsonJul 27, 2025
What to do if my Rolair VT20TB pump is slow to build tank pressure?
- J
  jasonliJul 27, 2025
  If your Rolair Air Compressor pump is slow to build tank pressure, several factors could be the cause. Here's what you can check: * 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.
L
Lisa Maxwell MDJul 31, 2025
Why does my Rolair VT20TB Air Compressor have excessive oil consumption?
- P
  Paula WhiteJul 31, 2025
  Excessive oil consumption in your Rolair Air Compressor can stem from several issues: * Too much oil in the crankcase: Drain it to the proper level. * Improper weight of oil: Replace it with the proper oil. * 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 will require you to take the unit in for service.
A
Angela AlvarezAug 5, 2025
What to do if my Rolair Air Compressor motor trips the overload/reset button?
- S
  stevenfernandezAug 5, 2025
  If the motor of your Rolair Air Compressor keeps tripping the overload/reset button, consider the following: * The motor is starting and stopping too frequently: Install a constant speed or dual control kit. * The overload is defective or weak: Replace the overload. * You're using an extension cord with an improper gauge: Use longer lengths of air hose or a heavier cord. * The motor thru bolts are stripped or poorly tightened: Retighten or replace the stripped thru bolts. If there are cracks in the end bell or housing, take the unit in for service.
M
mary51Aug 10, 2025
How to fix a knocking noise in my Rolair Air Compressor?
- S
  Shawn MartinezAug 10, 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. If the problem is internal to the pump, take the unit in for service.
G
Glenn WilliamsAug 16, 2025
What to do if my Rolair VT20TB is overheating?
- J
  Jacqueline JohnsonAug 16, 2025
  If your Rolair Air Compressor is overheating: * Ensure there is proper ventilation by relocating the compressor. * If there is improper pump rotation, contact an electrician. If the issue persists, there may be an internal pump problem, and you should take the unit in for service.
S
Shawn SmithAug 20, 2025
How to troubleshoot a dead electric motor on my Rolair Air Compressor?
- P
  Peter CoxAug 20, 2025
  If the electric motor on your Rolair Air Compressor is dead and won't even hum, check these: * The thermal overload may have tripped: Locate and push the reset button. * The reset button may be physically broken: Replace the overload/reset. * There may be loose motor leads or electrical connections: Locate and correct any loose electrical connections. * There may be a short in the power cord: Replace the power cord.

Rolair VT20TB Specifications

General

Type	Portable
Tank Capacity	20 Gallons
Max Pressure	125 PSI
Motor	2 HP
Voltage	120V
Pump Type	Oil-Free
Amperage	15 Amps

Summary

Safety Warnings

Risk of Asphyxiation

Potential hazards from inhaling compressed air or engine exhaust fumes, leading to serious injury or death.

Risk of Bursting

Dangers associated with air tank explosions due to improper maintenance or modifications to pressure components.

Risk of Electrocution or Electrical Shock

Hazards related to improper grounding, operation in wet conditions, or electrical repairs by unqualified personnel.

Risk of Explosion or Fire

Dangers of ignition from sparks, overheating, or flammable materials near the compressor.

Risk from Moving Parts

Hazards from contact with belts, pulleys, or fans, and unexpected restarts of electric units.

Risk of Burn

Danger of touching hot metal parts during or after operation, including engine exhaust.

Risk of Injury from Lifting

Potential injury from attempting to lift objects that are too heavy for one person.

Flying Objects

Risk of injury from loose debris propelled at high speeds by the compressed air stream.

Risk of Unsafe Operation

Hazards from improper use, fatigue, or influence of alcohol/drugs.

Risk of Damage to Air Compressor or Property

Consequences of improper transport, operation, or oil leaks on carpets, floors, etc.

System Controls

Safety-Relief Valve

Valve designed to discharge tank pressure in case of system failure to prevent rupture.

Manual Overload / Motor Reset

Protection against motor overheating, requiring manual reset.

Pressure Switch

Device that automatically starts and stops the compressor based on tank pressure settings.

Regulator – Working Pressure

Adjusts and controls the output air pressure for tools or items being inflated.

Pressure Gauge(s)

Displays tank pressure and output/working pressure.

Drain Valve(s)

Allows daily drainage of moisture from the air tank to prevent corrosion.

Air Intake Filter

Prevents foreign matter from entering the pump or engine.

Sight Gauge/Dipstick

Used to check and maintain the proper oil level in the compressor.

Check Valve

Seals tank pressure and ensures a loadless start for the compressor.

Breather/Oil Fill Plug

Vents crankcase pressure in reciprocating pumps.

Cold-Start Valve

Allows the motor/pump to run unloaded for warm-up.

Vibration Dampener(s)

Rubber pads that protect the unit from vibration damage.

Pre-Start Checklist

Specifications

Oil Table and Recommendations

Details recommended oil types, viscosity grades, and change intervals for compressor lubrication.

Operation

General operating instructions for direct-drive electric models.

High-Altitude Operation

Considerations for running the compressor at higher elevations and potential adjustments.

Maintenance

Lubrication

Guidance on checking and maintaining oil levels for proper pump lubrication.

Maintenance Schedule

A detailed schedule for daily, weekly, monthly, and quarterly maintenance tasks.

Troubleshooting

Guarantee

Quality Commitment

Associate Engineering Corporation's dedication to product quality and research.

Schematics

Schematic for VT20TB

Illustrated diagram showing parts and their assembly for the VT20TB model.

Schematic for VT25BIG

Illustrated diagram showing parts and their assembly for the VT25BIG model.

Parts List

Parts List for Model VT20TB

Comprehensive list of parts with schematic numbers for the VT20TB model.

Parts List for Model VT25BIG

Comprehensive list of parts with schematic numbers for the VT25BIG model.

Related product manuals

Rolair VT20TB User Manual

Table of Contents

Questions and Answers:

Rolair VT20TB Specifications

Summary

Safety Warnings

Risk of Asphyxiation

Risk of Bursting

Risk of Electrocution or Electrical Shock

Risk of Explosion or Fire

Risk from Moving Parts

Risk of Burn

Risk of Injury from Lifting

Flying Objects

Risk of Unsafe Operation

Risk of Damage to Air Compressor or Property

System Controls

Safety-Relief Valve

Manual Overload / Motor Reset

Pressure Switch

Regulator – Working Pressure

Pressure Gauge(s)

Drain Valve(s)

Air Intake Filter

Sight Gauge/Dipstick

Check Valve

Breather/Oil Fill Plug

Cold-Start Valve

Vibration Dampener(s)

Pre-Start Checklist

Specifications

Oil Table and Recommendations

Operation

High-Altitude Operation

Maintenance

Lubrication

Maintenance Schedule

Troubleshooting

Guarantee

Quality Commitment

Schematics

Schematic for VT20TB

Schematic for VT25BIG

Parts List

Parts List for Model VT20TB

Parts List for Model VT25BIG

Related product manuals