Makita MAC1200 owner manual Maintenance, Units With External Brass Check Valve

MAINTENANCE

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN OCCUR. BEFORE

PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRESSOR AND BLEED OFF ALL AIR PRES- SURE.

To ensure efficient operationand longer lie of the air compressor outfii, a routine maintenance schedule should be prepared and followed.Thefolbwing routinemaintenancescheduleisgearedtoan outfiit in a normalworkingenvironmentoperatingon adaily basis.

Ifnecessary, the schedule should be modifiedto suit the conditions under which your compressor is used. The modificationswill depend uponthe hours of operation andthe working environment.Compressoroutfiksin an extremelydirty and/or hostileenvironment will require a greater frequency of all maintenance checks. Lubricate compressor motor (if required) according to manufacturer's instructions,which are attached to your motor.

ROUTINE MAINTENANCE SCHEDULE

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Daily:

1.Drain water from the air tank, any moisture separators or transformers.

2.Check for any unusual noise and/or vibration.

3.Manually check all safety valves to make sure they are operating properly.

4.Inspect air filter, replace if necessary.

5. Inspect air linesand fittingsfor leaks; correct as necessary.

Each Year of Operation or ifa Problem isSuspected:

Check condition of air compressor pump intake and exhaust valves.

Check condition of check valve. Replace if damaged or worn out.

SERVICE INSTRUCTIONS

Air Filter -Inspection and Replacement

Keepthe air filter clean at all times. Do not operate the compressor with the air filter removed.

A dirty air filter will not allow the compressor to operate at full capacity. Before you use the compressor, check the air filter to be sure it is clean.

If it is dirty, simply pull it out and replace.

Safety Valve - Inspection

IF THE SAFETY VALVE DOES NOT WORK PROP- ERLY, OVER-PRESSURIZATION MAY OCCUR, CAUSING AIR TANK RUPTURE OR AN 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 RE-

PLACED WITH THE SAME TYPE OF VALVE.

Units With External Brass Check Valve

Replacement

1.Release all air pressure from air tank and unplug outfit.

2.Removeshroud.

3.Loosenthetopandbottomnutoftheoutlettubeandremove.

4.Remove the pressure release tube and fitting. -'

5.Unscrew the check valve (turn counterclockw$e) using a socket wrench.

6.Check thatthe valve disc movesfreely inside the checkvalve and that the spring holds the disc in the upper, closed position. The check valve may be cleaned with a strong solvent.

7.Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise).

8.Replacethe pressure releasetube and fitting.

9.Replacethe outlettube and tighten top and bottomputs.

10.Replacetheshroud.

Motor

The motor has an automatic resetthermal overload protector. If the motor overheats for any reason, the overload protector will shutoffthe motor.Themotormustbe allowedtocooldown before restarting. The compressor will automatically restart after the

motprcoo~s.

Ifthe overload protectorshuts the motor off frequently, check for a possible voltage problem. Low voltage can also be SUS-

pectedwhen:

1.The motor does not get up to full power or speed.

2.Fuses blow out when starting the motor; lights dim and remain dim when motor is started and is running.

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