SPECIFICATIONS
®SULLAIR®
3700 Operator’s Manual and Parts List
17
3.2 LUBRICATION GUIDE
Refer to Figure 3-1 for location of fluid fill port. For best 
value and longest uninterrupted service, the 3700 Series 
compressors are factory filled and tested with Sullube 
lubricant.
If fluid change is required, follow Lubrication Change 
Recommendations, Section 3.4.
Maintenance of all other components is still 
recommended as indicated in the Operator’s Manual.
DO NOT MIX DIFFERENT TYPES OF FLUIDS. 
Contamination of non-detergent mineral fluids with 
traces of detergent motor fluids may lead to operational 
problems such as foaming, filter plugging, orifice or line 
plugging.
When ambient conditions exceed those noted or if 
conditions warrant use of “extended” life lubricants 
contact Sullair for recommendation.
 Figure 3-1
1. Fluid Fill Port
2. Sight Glass
3. Fluid Drain Valve
4. Sump Tank
F i g u r e   3 - 1        
Fluid Fill Location
3.3 APPLICATION GUIDE
Sullair encourages the user to participate in a fluid 
analysis program with the fluid suppliers. This could 
result in a fluid change interval differing from that stated 
in the manual. Contact your Sullair dealer for details.
CAUTION
Mixing of other lubricants within the 
compressor unit will void all warranties.
SU-0000022
A WARNINGA WARNINGA WARNING
"The Plastic Pipe Institute recommends 
against the use of thermoplastic pipe to 
transport compressed air or other 
compressed gases in exposed above 
ground locations, e.g. in exposed plant 
piping." (I)
Sullube should not be used with PVC 
piping systems. It may affect the bond at 
cemented joints. Certain other plastic 
materials may also be affected.
(I) Plastic Pipe Institute, Recommendation 
B, Adopted January 19, 1972.
SU_0000024
NOTE
Flush system when switching lubricant 
brands.
SU_0000025
3!?