Central Pneumatic 67847 User Manual

Central Pneumatic 67847

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ITEM 67847

21

GAL

cast iron

vertical air

compressor

Read this material before using this product.

Failure to do so can result in serious injury.

SAVE THIS MANUAL.

Copyright

©

2012 by Harbor Freight Tools

®

. All rights reserved.

No portion of this manual or any artwork contained herein may be reproduced in

any shape or form without the express written consent of Harbor Freight Tools.

Diagrams within this manual may not be drawn proportionally. Due to continuing

improvements, actual product may differ slightly from the product described herein.

Tools required for assembly and service may not be included.

When unpacking, make sure that the product is intact

and undamaged. If any parts are missing or broken,

please call 1-800-444-3353 as soon as possible.

Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating,

inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual

near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and

the receipt in a safe and dry place for future reference.

Owner’s Manual & Safety Instructions

Table of Contents

Other manuals for Central Pneumatic 67847

Startup Guide4 pages

Questions and Answers:

C
Christopher SmithAug 20, 2025
Why is my Central Pneumatic 67847 overheating?
- J
  Joe WarrenAug 20, 2025
  If your Central Pneumatic Air Compressor is overheating, several factors could be the cause. Start by checking and cleaning or replacing the air filters. Ensure you're using the recommended oil and that the crankcase oil level is correct, checking for any leaks. Dusty environments can also contribute, so clean or replace filters more often, or move the unit to a cleaner location. Eliminate any extension cords. Finally, make sure the unit is positioned on a level surface.
P
pkleinAug 23, 2025
Why is my Central Pneumatic 67847 Air Compressor building pressure slowly?
- G
  galvanjanetAug 23, 2025
  If your Central Pneumatic Air Compressor is building pressure too slowly, there are several potential causes. First, check that the circuit matches the compressor requirements and that the power supply is correct. If the crankcase oil is overfilled or too thick, drain and refill to the proper level with the recommended oil. A cold working environment can also affect performance, so move the compressor to a warmer location and ensure the correct oil is in the crankcase. Listen for air leaking from the safety valve; if it is leaking, replace it with an identical valve with the same rating, but do not seal or tamper with the safety valve. Finally, check all fittings with a soap solution for air leaks and tighten as needed, being careful not to overtighten.
C
Clarence BeltranAug 26, 2025
Why is my Central Pneumatic Air Compressor not building enough pressure?
- G
  Glenn PhamAug 26, 2025
  If your Central Pneumatic Air Compressor isn't building enough air pressure, start by checking and cleaning or replacing the air filters. A technician may need to clean or replace the check valve. Ensure the compressor is large enough for the job by verifying that the accessory CFM is met; if not, a larger compressor is needed. Check all fittings for leaks using a soap solution and tighten as necessary, without overtightening. Replace any narrow hoses or hose connections with wider ones. If the crankcase oil is too thick, drain and refill with the recommended oil. Finally, consider that high altitude can reduce air output, requiring a compressor with greater output.
J
Joseph CrawfordAug 28, 2025
Why does my Central Pneumatic 67847 start and stop so often?
- J
  Joel GatesAug 28, 2025
  If your Central Pneumatic Air Compressor starts and stops too frequently, loose fittings could be the cause. Reduce air pressure and check all fittings with a soap solution for air leaks, tightening them as needed. Also, the compressor may not be large enough for the job. Check if the accessory CFM is met by the compressor; if it doesn’t reach the required CFM, a larger compressor is needed.
J
Janet RobertsAug 30, 2025
Why is my Central Pneumatic Air Compressor using so much oil?
- H
  halechadAug 31, 2025
  If you notice high oil consumption in your Central Pneumatic Air Compressor, there are a few things to check. First, ensure you're using the recommended oil and that it's not too thin; drain and refill to the proper level if necessary. Also, make sure the unit is positioned on a level surface. Finally, check for and clean any clogs in the crankcase vent.
C
Christopher OlsonSep 2, 2025
How to fix air leaks from the pump or fittings on my Central Pneumatic 67847?
- K
  Krista HughesSep 2, 2025
  If you notice air leaks from the pump or fittings of your Central Pneumatic Air Compressor, reduce the air pressure and check all fittings with a soap solution for leaks. Tighten as needed, but do not overtighten.
A
Alexander GallegosSep 5, 2025
Why is my Central Pneumatic 67847 Air Compressor so loud?
- C
  Chelsea OrtizSep 5, 2025
  If your Central Pneumatic Air Compressor is excessively noisy, several issues could be responsible. Ensure the crankcase oil level is correct and that you're using the recommended oil type and thickness; drain and refill if necessary. Check for leaks and add oil if the level is too low. Inspect the belt guard for looseness or damage, replacing it if needed. Also, check all fittings for leaks, tightening them carefully. Finally, make sure the unit is placed on a level surface.
T
Tara BrownSep 7, 2025
Why is there oil in the discharge air from my Central Pneumatic 67847 Air Compressor?
- F
  fhowellSep 7, 2025
  If there's oil in the discharge air of your Central Pneumatic Air Compressor, it could be due to the crankcase oil being too thin or overfilled. Drain the oil and refill it to the proper level with the recommended oil. Also, check for and clean any clogs in the crankcase vents.
A
Alicia LeonSep 10, 2025
What to do if there's moisture in the discharge air of my Central Pneumatic Air Compressor?
- A
  Alex WalshSep 10, 2025
  To address moisture in the discharge air of your Central Pneumatic Air Compressor, the primary solution is to install an inline air filter/dryer. Additionally, consider relocating the compressor to a less humid environment.
J
James DavisSep 12, 2025
What to do if the safety valve on my Central Pneumatic 67847 Air Compressor keeps popping?
- M
  Martin SnyderSep 12, 2025
  If the safety valve on your Central Pneumatic Air Compressor is popping, it may need service. Pull on the test ring of the safety valve. If it continues to pop, replace it.

Central Pneumatic 67847 Specifications

General

Brand	Central Pneumatic
Model	67847
Category	Air Compressor
Language	English

Summary

Warning Symbols and Definitions

Important Safety Information

General Safety Warnings

Covers essential safety precautions for operating the compressor.

Work Area Safety

Ensures a safe environment around the compressor during operation.

Electrical Safety

Details safe practices for using electrical connections and cords.

Personal Safety

Emphasizes user alertness, protective gear, and preventing unintentional starts.

Compressor Use and Care

Guidance on proper operation, maintenance, and storage of the compressor.

Service Recommendations

Recommendations for qualified personnel for compressor maintenance and repair.

Grounding Procedures

120V Grounded Compressors

Explains proper grounding procedures for 120V compressors with three-prong plugs.

Technical Symbology

Specifications Overview

Initial Setup Instructions

Guidance on initial setup and preparation for operating the air compressor.

Assembly Instructions

Component Assembly

Details on attaching wheels, foot pads, handle, and air filter.

Break-in Procedure

Steps for the initial operation and break-in of the compressor.

Accessory Connections

Guidance on connecting air hoses, regulators, and optional tools.

Oil Level and Maintenance

Checking and Adding Oil

Procedure for checking and adding the correct oil level.

Cold Weather Operation

Recommendations for operating the compressor in cold temperatures.

Operating Instructions

Compressor Area Setup

Guidelines for selecting and preparing the compressor's operating location.

General Operation Guide

Emergency Depressurization

Automatic Shut-off System

Maintenance and Servicing

Cleaning, Maintenance, Lubrication

Procedures for cleaning, maintaining, and lubricating the air compressor.

Maintenance Schedule

Daily, weekly, and monthly checks for compressor upkeep.

Oil Maintenance Procedures

Draining Tank Moisture

Air Filter Maintenance

Troubleshooting Guide

Compressor Start/Restart Issues

Addresses problems related to the compressor failing to start or restart.

Slow Pressure Build-up

Diagnoses and solutions for slow pressure buildup in the compressor.

Insufficient Air Pressure

Troubleshooting steps for when the compressor doesn't build enough air pressure.

High Oil Consumption

Explains causes and solutions for excessive oil usage by the compressor.

Troubleshooting (Continued)

Overheating Issues

Diagnoses and solutions for compressor overheating problems.

Excessive Cycling

Troubleshooting for compressors that start and stop excessively.

Noise and Air Quality

Addresses excessive noise, moisture, and oil in discharged air.

Leaks and Safety Valve Problems

Troubleshooting air leaks and safety valve malfunctions.

Parts List and Diagram

Component Parts List

Detailed list of all components and their quantities for the air compressor.

Assembly Diagram

Limited 90 Day Warranty

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