Sears 919.18416 - Manual (Page 9)

Adirty ai rfitterwill not allowihe compressortooperateatfull
capacity. Before you usethecompressor, check the airf liter
to be sure it is clean.
If it isdirty, remove the screwsandfilter retainer. Pulloutthe
fitter, replacewith new.
Oil - Checking and Changing
ACAUTION
Overfilling with oil will cause premature com­
pressor failure. Do not overfill.
Check oil level inthecrankcase daily. The oil level should
be even withthetopof thefill hole and must notbeallowed
tobelowerthan3/8“ fromthetop (6 threads) ata’ny time. It
is recommended thattheoil bechangedafterevery 10Ohours
ofoperation.Todraintheoil,removetheoildrainplugand
collect theoilinasuitable container. Besure to replace the
plug securely beforeadding newoil. Use aspecial compressor
oil such as Sears 9-16426 or SAE-20-20W SF motor oil.
(Crankcaseoil capacity is 16fluidounces.) Under extreme
winterconditionsuse lOweightoil.
Air Tank - Draining Water
5.
6 .
Apply sealantto the check valve threads.Reinstall
the check valve {turn clockwise). The valve stem
should still move freely - do not overtighten.
Replacetheoutlettube and tighten top and bottom
nuts.
AWARNING
WATER WILL CONDENSE IN THE AIR TANK. IF
NOT DRAINED, THE WATER WILL CORRODE
AND WEAKEN THE AIR TANK CAUSING A RISK
OF AIR TANK RUPTURE. ,
Watershould bedrained from theairtankaftereach use.
Operatethe unittoapply 15-20PS1G and openthedraincock.
Continueoperating
unit untilall moisture isremovedfrom
theairtank. Close thedraincock tightly.
NOTE
If drain cock valve is clogged, release air pressure in
air tank. The drain cock valve can then be removed,
cleaned and reinstalled.
'
Check Valve - Inspection and
Replacement
Remove the check valve for inspection or replacement if
airtank pressure will not build up. Use the following
procedure to inspect, cleanorreplace the checkvalve.
1. Releaseairpressurefromtheairtank.
2. Loosen the top and bottom nuts and remove the
outlettube.
3. Unscrewthe checkvalve (turn counterclockwise)
using a 7/8" diameter 1/2" socket wrench.
4. Check that the valve disc moves freely inside the
check va Ive and thatthe spri ng holds the disc i n the
upper, closed position. The check valve may be
cleaned with a solvent.
Safety Valve - Inspection
AWARNING
IF THE SAFETYVALVE DOES NOT WORK PROP­
ERLY
OVER-PRESSURIZATION MAY OCCUR,
CAUSING AIR TANK RUPTURE OR EXPLOSION.
OCCASIONALLY
PULL THE RING ON THE
SAFETY VALVE TO MAKE SURE THAT THE
SAFETY VALVE OPERATES FREELY. IF THE
VALVE IS STUCK OR DOES NOT OPERATE
SMOOTHLY, IT MUST BE REPLACED WITH THE
SAME TYPE OF VALVE.
Motor
The motor hasa thermal overload protector. If the motor
overheatsforany reason, theoverload protectorwi 11 shutoff
themotor.The motormust beallowedtocooldown before
restarting. De-energize powersupply.To restart, depressthe
resetbutton located ontheendofthemotorand energizethe
powersupply.
NOTE
If the overload protector shuts the motor off
frequently, check for a possible voltage problem.
Low voltage can also be suspected when:
1. the motor does not get up to full power or
speed;
2. fuses blow out when the motor is started;
3. I ig hts dim when motor is started and remain
dim while it is running.
Belt - Replacement
AWARNING
SERIOUS INJURY OR DAMAGE MAY OCCUR IF
PARTS OF THE BODY OR LOOSE ITEMS GET
CAUGHT IN MOVING PARTS. NEVER OPERATE
THE
COMPRESSOR WITH THE BELT GUARD
REMOVED. THE BELT GUARD SHOULD BE RE­
MOVED ONLY WHEN THE POWER TO THE COM­
PRESSOR IS DISCONNECTED.
The motor is mounted on an adjustable motor base.
To replace belt:
1. Turnoff and lockoutpowersource.
2. Remove screws from the back of the belt guard.
3. Loosen the fou r motor mounti ng screws.
4. SI ide the motortowa rd the com pressor pump.
5. Removebettand replace.
9 - Erg