Sullair 300HH Operator's Manual And Parts List

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OPERATOR’S MANUAL AND PARTS LIST

Po r t a b l e ai r Co m P r e s s o r

300HH, 375, 375H a n d 425 ex P o r t

Caterpillar Standard and Aftercooled and Filtered

PART NUMBER:

02250169-733

©

SULLAIR CORPORATION

The information in this document

is correct at the time of printing for

portable compressor serial number

200705010000

and all subsequent serial numbers.

KEEP FOR

FUTURE

REFERENCE

Table of Contents

Other manuals for Sullair 300HH

Operators Manual And Parts Lists164 pages

User Manual80 pages

Questions and Answers:

C
Christopher HansenAug 20, 2025
What does SSAM flash code two flashes mean on a Sullair Air Compressor?
- B
  Brittany ScottAug 21, 2025
  If your Sullair Air Compressor shows SSAM flash code two flashes, it indicates that the engine coolant temperature switch is open, insufficient cooling airflow, or a loose/broken fan belt, or no engine coolant. Check the wiring connection to the switch and tighten it if necessary. Also, check the switch continuity to ground and replace if necessary. Clean the cooler and check for proper ventilation. Check the fan belt and tighten or replace it if necessary. Fill with proper water/glycol mixture as required.
C
Cindy BestAug 22, 2025
What does SSAM flash code one flash mean on a Sullair Air Compressor?
- J
  juansmithAug 22, 2025
  If your Sullair Air Compressor displays SSAM flash code one flash, it means the compressor temperature switch is open. Check the wiring connection to the switch and tighten it if loose. Also, check the switch continuity to ground and replace if necessary. If the compressor feels hot refer to COMPRESSOR OVERHEATING trouble shooting procedure.
G
gregoryallenAug 25, 2025
What does SSAM flash code three flashes mean on a Sullair 300HH?
- K
  Kevin NguyenAug 25, 2025
  If your Sullair Air Compressor shows SSAM flash code three flashes, it indicates the engine oil pressure switch is open. Check the wiring connection to the switch and tighten if necessary. Install gauge in parallel with the switch. Replace the switch if the pressure exceeds 15 psig and stays open. If the pressure is less than 15 psig, refer to the Engine Operator’s Manual.
F
frank33Aug 26, 2025
Why is my Sullair Air Compressor not achieving full discharge pressure?
- J
  Jessica ButlerAug 26, 2025
  If your Sullair air compressor isn't reaching full discharge pressure, it could be due to: * The run/start valve not being in the run position (for compressors with idle warm-up controls, switch the valve to RUN). * Excessive air demand (check service lines for leaks or open valves). * A dirty air filter (check the filter and change the element if required). * A defective pressure regulator (check the diaphragm and replace with a kit if necessary). * A defective idle warm-up control (replace the control).
D
dianemillerAug 27, 2025
What causes improper unloading with excessive pressure build-up in Sullair 300HH Air Compressor?
- L
  Loretta PattersonAug 28, 2025
  Improper unloading with excessive pressure build-up in your Sullair Air Compressor can result from: * A pressure regulating valve set too high; readjust it. * A control system leak causing loss of pressure signal; check control lines. * A defective pressure regulating valve; repair the valve (kit available). * An inlet valve jammed; free or replace the valve. * A restriction in the control system; check all control lines and components for ice or other contaminants. * A defective pressure relief valve that opens when the pressure is too low; replace the pressure relief valve. * A defective pressure regulator; check the diaphragm and replace it with a kit if necessary.
J
Jill PalmerAug 29, 2025
What to do if my Sullair Air Compressor shows SSAM flash code one?
- S
  Shaun LambertAug 30, 2025
  If your Sullair Air Compressor displays SSAM flash code one, it indicates a potential issue with the compressor temperature. Here's what you should do: * Check the wiring connection to the compressor temperature switch and tighten it if it's loose. * Check the switch continuity to ground and replace it if necessary. * Ensure the receiver tank fluid level is adequate and add fluid if needed. * Inspect the fan belt for looseness or breakage, tightening or replacing it as required. * Address insufficient cooling airflow by cleaning the fluid cooler core and ensuring proper ventilation. * Change the fluid filter element if it's clogged. * Consider changing the fluid thermostat element if it's faulty. * If the fluid cooler tube is plugged internally, replace the cooler.
A
adam33Aug 31, 2025
How to troubleshoot SSAM flash code two on a Sullair Air Compressor?
- A
  Alexander BaxterAug 31, 2025
  When your Sullair Air Compressor shows SSAM flash code two, this usually points to a problem with the engine coolant temperature. Here's how to troubleshoot: * Check the wiring connection to the engine coolant temperature switch and tighten it if necessary. * Check the switch continuity to ground and replace if necessary. * Ensure adequate cooling airflow by cleaning the cooler and verifying proper ventilation. * Inspect the fan belt; tighten or replace if loose or broken. * Check the engine coolant level and fill with the correct water/glycol mixture if low. * Change the water pump if it's faulty. * Replace the engine thermostat element if it's defective.
R
Rebecca HawkinsSep 2, 2025
What does SSAM flash code three mean on my Sullair Air Compressor?
- B
  blackjamesSep 2, 2025
  SSAM flash code three on your Sullair Air Compressor indicates a potential issue with the engine oil pressure switch. You should: * Check the wiring connection to the switch and tighten it if necessary. * Install a gauge in parallel with the switch. Replace the switch if the pressure exceeds 15 psig and stays open.
E
Elizabeth KleinSep 3, 2025
What to do if my Sullair 300HH Air Compressor engine does not crank or start?
- J
  Jennifer PatrickSep 4, 2025
  If your Sullair Air Compressor engine doesn't crank or starts, check the battery cables and tighten them if they are loose. Also, inspect the ground wire for secure attachment to the frame and tighten if needed. If the issue persists, recharge or replace the battery. Examine the fuse in the wiring harness and replace it if it's blown. Check the instrument panel connectors and wires for loose connections, breaks, or corrosion, and reattach, clean, or replace as necessary. Finally, a faulty SSAM module may also be the reason, try to replace the module.
D
Debra MoralesSep 5, 2025
Why is my Sullair Air Compressor engine coolant temperature high?
- E
  Eduardo WhiteSep 6, 2025
  Several factors can cause the engine coolant temperature to be high: * The engine coolant temperature switch may be open; check the wiring connection and tighten if necessary, or check the switch continuity to ground and replace if necessary. * Insufficient cooling airflow; clean the cooler and check for proper ventilation. * A loose or broken fan belt; tighten or replace the belt. * Low engine coolant; fill with the proper water/glycol mixture as required. * A faulty water pump; change the pump. * A defective engine thermostat; change the thermostat element.

Sullair 300HH Specifications

General

Model	300HH
Flow Rate	300 cfm
Weight	6, 100 lbs (2, 767 kg)
Type	Rotary Screw Air Compressor
Drive Type	Direct

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