Sealey SAC55075B - Manual (Page 3)

In order to keep the compressor in good working condition,
periodic maintenance is essential.
IMPORTANT! Failure to carry out maintenance tasks may
invalidate the warranty on your compressor.
 WARNING! Before performing any maintenance operation,
switch off the compressor, disconnect from electricity
supply and release all air from the tank (except for 5.3.a)
5.1. Operations to be carried out after the first 50 working hours:
a) Check that all bolts/nuts are tight, particularly those retaining
the crankcase and cylinder head.
b) Replace the lubricating oil - see para 5.5.a. shown in fig.4.
5.2. Operations to be carried out weekly:
a) Drain condensation by opening the valve located under the
tank (fig.7). Place a container under the valve and open the
valve by turning anti-clockwise.
 WARNING! Take care if there is still pressure inside the cylinder
as water could flow out with considerable force.
Recommended pressure 1 - 2bar max.
b) Check oil level and, if necessary, top up.
5.3. Operations to be carried out every 50 hours
(or more frequently, if the compressor operates in a very
dusty atmosphere):
a) Remove the air filter element (fig.4). Using stored air from
the compressor's tank, clean the filter with compressed air.
(Wear eye protection and DO NOT direct air towards the
body or hands). DO NOT operate the compressor without
the filter as foreign bodies or dust could seriously damage
the pump. Replace the filter element and air filter housing.
b) Check for oil leaks.
5.4. Operations to be carried out every 100 hours:
a) Check the automatic cut-out at max. pressure and the
automatic cut-in at 2bar below.
5.5. Operations to be carried out every 400 hours:
a) Replace the lubricating oil. (Refer to fig.4) For oil
specifications see 5.7.
Remove the oil filler, then remove the oil drainer plug
draining the oil into a container. Drain when the
compressor is hot so that the oil drains rapidly and completely.
Replace oil drain plug and refill through the oil filler. DO
NOT overfill (check level at oil level window, red dot denotes
correct level.) Replace oil filler.
 WARNING! Never mix different oils and DO NOT use non-
detergent/low quality oils as the compressor may be damaged.
 WARNING! Dispose of waste oil only in accordance with
local authority requirements.
b) Replace air filter. (See fig.6)
c) Check all tube fittings and electrical connections.
d) Inspect pressure tank inside and out for damage or corrosion.
Maintenance Operations Weekly 50hrs 100hrs 400 hrs
Drain condensation
•
Check oil level
•
Clean intake filter
•
Check for oil leaks
•
Replace oil
•
Check cut-out
•
General cleaning of
compressor
•
Replace air filter
•
Check tube fittings and
electrical connections
•
Original Language Version © Jack Sealey Limited SAC55075B Issue: 1 - 24/12/14
5. MAINTENANCE
5.6. Maintenance Schedule
4.3. STARTING THE COMPRESSOR
4.3.1 Check that the ON/OFF switch (fig.5) is OFF in the "O" position.
4.3.2 Plug mains lead into mains supply and start the compressor by
moving the pressure switch to the ON ‘I’ position. Check the
direction of rotation (see arrow on cylinder head cover) to
confirm correct wiring of 3-phase plug.
4.3.3 When starting the compressor for the first time, leave it running
with no air tools connected to the air outlet. Make sure that
pressure in the tank rises and that the compressor stops
automatically when the maximum pressure value allowed -
written on the plate and shown on the gauge is achieved.
The compressor will now operate automatically.
The pressure switch stops the motor when the maximum
tank pressure is reached and restarts it when the pressure
falls below the minimum threshold.
4.3.4 Stop the compressor by moving the pressure switch (fig.2) to
the "O" position. The compressed air inside the compressor
head will flow out, making the restart easier and preventing the
motor from being damaged. DO NOT, other than in an
emergency , stop the compressor by switching off the mains
power, or by pulling the plug out, as the pressure relief will not
then operate and motor damage may result upon restart.
When the compressor runs correctly and is stopped correctly
there will be: (a) a whistle of compressed air when the motor
stops. (b) a protracted whistle (about 20-25 seconds) when the
compressor starts with no pressure in the tank.
WARNING! For this reason DO NOT tamper with, or adjust,
the switch or safety valve.
fig.5
4.2. Operation

WARNING! Ensure that you have read, understood and
apply Section 1 Safety Instructions.
 IMPORTANT! The use of extension leads not
recommended as the resulting voltage drop reduces
motor, and therefore pump performance, and could cause
damage to the compressor.
NOTE: Take care when selecting tools for use with the
compressor. Air tool manufacturers normally express the
volume of air required to operate a tool in cubic feet per
minute (cfm). This refers to free air delivered by the
compressor (‘air out’) which varies according to the pressure
setting. DO NOT confuse this with the compressor
displacement which is the air taken in by the compressor (‘air
in’). ‘Air out’ is always less than ‘air in’ due to losses within the
compressor.