Assembly / Installation
Lubrication and Oil
CAUTION Do not attempt to operate this air 
compressor without first verifying the oil level in the crankcase. This compressor is shipped with oil in the crankcase. Serious damage of the compressor can result from even momentary operation without proper lubrication.
Prior to each use, verify the crankcase oil level. An oil sight gauge with minimum and maximum oil level marks is provided with this compressor.
Always verify that the oil level is at the maximum mark in the oil sight gauge before operating this unit. Do not operate the pump with an inadequate or excessive amount of oil. The cost of failures which occur due to incorrect oil levels will not be covered under warranty.
To check the oil level: (see Fig. 1)
1.Place unit on a level surface.
2.Remove dipstick, wipe with a clean rag, replace in crankcase, then remove dipstick to inspect oil level.
3.If oil level is low, add as required, but do not exceed maximum oil level.
MAX
MIN
Fig. 1
CAUTION Do not allow particulates such as 
sawdusttofallintocrankcasewhen crank case is open for inspection. Particulates in oil
may reduce compressor life.
CAUTION Do not use a detergent oil in 
crankcase. Detergent oils will leave deposits on internal compressor components reducing compressor life and performance.
frame.
3.Place screw through washer (D) and thread screw into end of wheel spindle (C). Tighten screw to secure to spindle.
4.Repeat these steps for second wheel.
(D)
(C)(A)
(B)
Fig. 2
Grounding
This product must be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This product is equipped with a cord having a grounding wire with an appropriate grounding plug. The plug must be inserted into an outlet that is properly installed and grounded in accordance with all local codes and ordinances (see Fig. 3).
WARNING Improper installation of the 
grounding plug is able to result in a risk of electric shock. When repair or replacement of the cord or plug is required, do not connect the grounding wire to either flat blade terminal. The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire.
Check with a qualified electrician or serviceman
when the grounding instructions are not completely understood, or when in doubt as to whether the product is properly grounded. Do not modify the plug provided; if it does not fit the outlet, have the proper outlet installed by a qualified electrician.
DIRECTIONS FOR INSTALLING WHEELS
(CET4-20W ONLY See Fig. 2)
1.Take wheel spindle (A) and thread into wheel bracket (B), which is welded to compressor frame. Tighten spindle with wrench to secure to frame.
2.Slide wheel onto wheel spindle. Inflation stem for wheelassemblyshouldfacetowardthecompressor
GROUNDED
OUTLET
GROUNDING
PIN
Fig. 3
GROUNDED OUTLET BOX
8
