Sears 919.18416 Oil Checking and Changing, Air Tank Draining Water, Safety Valve Inspection

Adirtyair fllterwill not allowthe compressortooperateat full capacity. Beforeyou usethecompressor, checkthe airfilter to be sure it isclean.

tf itisdirty, mmovethescrewsand filter retainer. Pulloutthe filter, mplacewith new.

Oil - Checking and Changing

Overfilling with oil will cause premature com- pressor failure. Do not overfill.

Check oil level in the crankcase daily. The oil level should

beeven withthetopofthefill hole and must not,beallowed tobelowerthan3/8" fromthetop (6threads)at _nytime. It isrecommendedthatthe oil bechanged afterevery 100hours of operation.Todrainthe oil, removethe oildrain plug and collecttheoilin asuitable container. Besureto replacethe plug securelybeforeadding newoil. Useaspecialcompressor oil such as Sears 9-16426 or SAE-20-20W SFmotor oil. (Crankcaseoil capacityis 16fluidounces.) Underextreme winterconditionsuse 10weightoil.

Air Tank - Draining Water

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 be drained from the airtankaftereach use.

Operatethe unittoapply 15-20PSIGand openthedraincock. Continueoperating unit untilall moisture isremovedfrom

the airtank. Closethe drain cocktightly.

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 checkvalve for inspection or r_placement if air tank pressure will not build up. Use the following procedure to inspect, clean or replace the checkvalve.

1.Release air pressure fromthe air tank.

2.Loosen thetop and bottom nuts and removethe outlettube.

3.Unscrewthe checkvalve (turn counterclockwise) using a7/8" diameter 1/2" socketwrench.

4.Check that the valve disc moves freely inside the checkvalve and thatthespring holdsthediscin the

upper, closed position. The check valve may be cleaned with a solvent.

5.Apply sealant tothe checkvalve threads.Reinstall the check valve (turn clockwise). The valve stem should still move freely- do not over tighten.

6.Replacethe outlet tube andtighten top and bottom nuts.

Safety Valve - Inspection

IF THE SAFETY VALVE 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 overheats for any reason,theovedoad protectorwillshutoff the motor.The motor mustbeallowedtocoeldown before

restarting.De-energize power supply.To restart,depressthe resetbuttonlocatedontheendofthemotorandenergizethe

powersupply.

NOTE

If the overload protector shuts the motor off

frequently, checkfora possiblevoltage 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.lights dim when motor isstartecland remain dim while it is running.

Belt - Replacement

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 TOTHE COM- PRESSOR IS DISCONNECTED.

The motor ismounted on an adjustable motor base.

To replace belt:

1.Turn offand lockout powersource.

2.Remove screwsfrom the back ofthe belt guard.

3.Loosenthe four motor mounting screws.

4.Slidethe motor toward the compressorpump.

5.Remove belt and replace.

g --Eng