Maintenance; Service Interval - Craftsman 921.16473 Manuel Du Propriétaire

MAINTENANCE

WARNING:
To avoid personal injury, always shut off
and unplug the compressor and relieve all air pressure
from the system before performing any service on the air
compressor.
Regular maintenance will ensure trouble–free operation.
Your electric powered air compressor represents high–quality
engineering and construction; however, even high–quality
machinery requires periodic maintenance. The items listed below
should be inspected on a regular basis
DRAINING THE TANK
Drain the moisture from the tank (for instructions, see
"Shutdown" in the operating instructions section).
WARNING:
Condensation will accumulate in
the tank. To prevent corrosion of the tank from the
inside, this moisture must be drained at the end of
every workday. Wear protective eyewear.
NOTE: In cold climates, drain the tank after each use to reduce
problems with freezing of water condensation.
TO REPLACE OR CLEAN CHECK VALVE
WARNING:
RISK OF INJURY. This unit starts
automatically. ALWAYS shut off the compressor,
remove the plug from the outlet, and bleed all
pressure from the system before servicing the
compressor, and when the compressor is not in use.
Do not use the unit with the shrouds or belt guard
removed. Serious injury could occur from contact
with moving parts.
1. Turn air compressor off, remove the power cord from the
outlet or lock out the power supply and relieve all the air
pressure from the tank (refer to "Shutdown" in Operating
Instructions). Make sure the compressor has cooled down
before servicing.
2. Using the appropriately
sized wrench, loosen
the compression nuts
(A) on the check valve
(B). Gently move the
transfer tube (C) and
bleeder tube (D) out of
the way.
3. Making note of the
orientation for
reassembly, unscrew
the check valve from the
tank (counterclockwise)
using the appropriately
sized wrench.
4. Using a pencil or
screwdriver, carefully
push the valve disc up
and down. If the valve
disc does not move freely
up and down, the check
valve needs to be cleaned
or replaced.
MAINTENANCE
D
A
B
C
A
Check valve
Screwdriver
or
pencil
5. Clean the check valve with warm soapy water and make sure
to dry thoroughly before reinstalling. If the disc valve still
does not move freely up and down, it will need to be
replaced.
6. Apply thread sealant to the check valve threads and reinstall
into the tank by turning clockwise. Make sure it is the
same orientation as when it was removed.
7. Replace the bleeder tube and tighten compression nuts.
8. Replace the transfer tube and tighten compression nuts.
CLEANING THE AIR FILTER
A dirty air filter will
reduce the compressor's
performance and life. To
avoid any internal
contamination of the pump,
the filter should be cleaned
frequently, and replaced on a
regular basis. Felt filters
should be cleaned in warm,
soapy water, rinsed, and
allowed to air dry before
reinstallation. Paper filters
should be replaced when
dirty. Do not allow the filter to become filled with dirt or paint. If
the filter becomes filled with paint, it should be replaced. Direct
exposure to dirty conditions or painting areas will void your
warranty.
CHECKING THE RELIEF VALVE
Pull the tank safety valve daily to ensure that it is operating
properly and to clear the valve of any possible obstructions.
TESTING FOR LEAKS
Check that all connections are tight. A small leak in any of
the hoses, transfer tubes, or pipe connections will substantially
reduce the performance of your air compressor. If you suspect a
leak, spray a small amount of soapy water around the area of the
suspected leak with a spray bottle. If bubbles appear, repair or
replace the faulty component. Do not over tighten any
connections.
STORAGE
Before storing the compressor for a prolonged period, use an
air blow gun to clean all dust and debris from the compressor.
Disconnect the power cord and coil it up. Pull the tank safety
valve to release all pressure from the tank. Drain all moisture
from the tank. Clean the filter element and filter housing; replace
the element if necessary. Drain the oil from the pump crankcase
and replace it with new oil. Cover the entire unit to protect it from
moisture and dust.

SERVICE INTERVAL

Perform the following maintenance at the
intervals indicated below.
Inspect air filter (clean or replace as necessary)
Operate the tank safety valve
Drain tank
8
Air filter
Daily or after
each use
When used in
dusty
conditions
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200-2802