Daily Maintenance; Electric Motor Maintenance; Servicing The Fluid Pump - AIRLESSCO 3A1182B Operation And Parts Manual

Maintenance

Daily Maintenance

Keep displacement pump packing nut/wet cup 1/3 full of
Airlessco Throat Seal Oil at all times. The TSO helps
protect the packings and rod.
Inspect the packing nut daily. If seepage of paint into the
packing nut and/or movement of the piston upward is
found (while not spraying), the packing nut should be
tightened just enough to stop leakage. Overtightening
will damage the packings and reduce the packing life.

Electric Motor Maintenance

Lubrication
The motor is supplied with pre-lubricated ball bearings,
lubricated for the life of the bearing.
Motor Brushes
Motor brushes need periodic inspection and replace-
ment as wear indicates. Standard brushes have an ini-
tial length of 1" and should be replaced when they are
worn to a length of 1/2". Brush wear is greatly influenced
by individual application and it is recommended that
brush wear be checked at early intervals of operation in
order to determine future required inspection.
To change the brushes:
1. Unplug the machine.
2. Remove the cover over the motor.
3. Open the two covers at the rear of the motor.
4. Disconnect the brush wire.
5. Pull out the wire.
6. Push the brush retainer clip in and withdraw.
7. Remove the worn brushes.
8. Install new brushes in the reverse order.
3A1182B
To increase brush life, new brushes (Part #331778) for
110 volt) need to have a run in period. After changing
brushes, set the machine for spraying. With a bucket of
Pump Conditioner and water, a 50' 1/4" airless hose, air-
less gun and tip on unit, open the prime/pressure relief
valve and switch on. The pump will now prime. With
pump running in the prime mode, turn the pressure con-
trol knob to high pressure. (The pump has to cycle fast
with no pressure in the pump). Run the pump for 20 min-
utes and the brushes will be run in.

Servicing the Fluid Pump

Fluid Pump Disconnect
1. Relieve Pressure, page 7.
2. Flush out the material you are spraying.
3. Remove the connecting rod shield (12).
4. Move the piston rod (10) to its lowest position by
cycling pump slowly.
5. Turn off the motor and disconnect the power from
the unit.
6. Disconnect fluid tube (16) from pump body.
7. Remove the suction tube assembly from the fluid
pump (9) by unscrewing the suction nut (7) with the
packing adjustment tool. (865008)
8. Remove the retaining ring (4) from the connecting
rod (2) and slide the sleeve (3) down revealing the
connecting rod pin (1).
9. Using a 1/2" wrench unscrew the two bolts (8) from
the cover assembly (14). The fluid pump (9) will be
hanging loosely at this point.
10. Remove the connecting rod pin (1) out of the con-
necting rod, allowing the removal of the fluid pump
(9) from the machine.
Maintenance
331778
ti16051a
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