Pump Oil; Inspect / Clean Pump Air Filter; Inspect Safety Labels - Briggs & Stratton 203721GS Operator's Manual

Pump Oil

Checking Pump Oil Level
Use these steps to check oil level:
1. Turn off your air compressor as described in Stopping
your air compressor.
WARNING
Operating air compressor and tubing are HOT
and can cause burns.
• DO NOT touch compressor or tubing.
• Allow compressor to cool before servicing.
2. Place unit on a flat, level surface.
3. Carefully observe sight glass and verify that oil level is
at the dot (D) in the center of the sight glass.
4. If pump oil level is too low, slowly add recommended
oil into oil fill (B) to proper level. If oil is above
MAXIMUM oil level (C), drain excess oil, as described
in next section.
Changing Pump Oil
At recommended oil change interval, follow these steps:
1. Turn off your air compressor as described in Stopping
your air compressor.
2. Place unit on a flat, level surface.
3. Remove oil breather cap (A) from oil fill (B) location.
4. Position a suitable container under drain plug (E) to
collect drain oil.
5. Use an adjustable wrench to remove hex head drain
plug.
6. Fully drain oil into container. Install drain plug and
tighten using adjustable wrench. Dispose of used oil
properly.
7. Using oil funnel, slowly add recommended oil. Visually
inspect oil level frequently at sight glass to avoid
overfilling air compressor pump.
8. When oil is at proper level, reinstall oil breather cap and
wipe up any spilled oil.
16

Inspect / Clean Pump Air Filter

Use the following steps to check and clean the compressor's
internal air filter.
1. With air tank fully pressurized, turn off your air
2. Use phillips screwdriver to remove screw (F) holding
A
B
C
3. Remove air filter media (J).
IMPORTANT: DO NOT operate compressor with air filter
media removed.
D
E
• DO NOT direct air stream at self or others.
• Always wear ANSI Z87.1 approved safety glasses with side
shields.
4. If dirty, use compressed air to dislodge dirt from air
NOTE: DO NOT use liquid solvents to clean filter media.
5. Replace air filter media in compressor filter housing.
6. Position air filter cover over air filter media. Use phillips
NOTE: Replace air filter media if it is extremely dirty.

Inspect Safety Labels

As often as desired or at least yearly, inspect all labels
applied to the air compressor. All safety labels should be
present and readable. If any safety label is missing or
illegible, obtain a replacement from an authorized service
center or call the air compressor helpline at (800) 743-4115.
compressor as described in Stopping your air
compressor.
air filter cover (G) on compressor housing (H). Remove
air filter cover.
WARNING
Compressed air stream from hose or tank drain
can cause soft tissue damage to exposed skin
and can propel objects leading to severe injury
and / or property damage.
filter media. Also, blow debris out of air filter cover and
compressor filter housing.
screwdriver to secure cover with screw.
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H
J
F
G