Maintenance
3A1185B
11
Maintenance
Daily Maintenance
1.
Keep the displacement pump packing nut/wet cup
lubricated with Airlessco TSO (Throat Seal Oil) at all
times. The TSO helps protect the rod and packings.
2.
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, if applicable.
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.
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 valve and switch
on. The pump will now prime. With pump running in the
prime mode, turn the pressure control knob to high pres-
sure. (The pump has to cycle fast with no pressure in
the pump). Run the pump for 20 minutes and the
brushes will be run in.
Servicing the Fluid Pump
Fluid Pump Disconnect
1.
Relieve Pressure
, page 7.
2.
Flush the material you are spraying out of the
machine.
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.
6.
Disconnect Sensor by holding it in place with a 7/8”
wrench and unscrewing the swivel (6) with a 11/16”
wrench.
7.
Remove the retaining ring (3) from the connecting
rod (13) and slide the sleeve (2) down revealing the
connecting rod pin (1).
8.
Remove the suction tube assembly from the fluid
pump (9) by unscrewing the suction nut (7) with the
packing adjustment tool. (865008).
331778
ti16051a
