Maintenance
14
332882A
Maintenance
Daily Maintenance
1. Keep the displacement pump packing nut/wet cup
lubricated with Throat Seal Oil (TSO) or Packing
Seal Fluid at all times. The oil or fluid help 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. Disconnect power from the unit.
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.
9. To increase brush life, new brushes (Part # 331780)
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, airless gun and tip on unit, open the
prime valve and power on. The pump will now
prime. With pump running in the prime mode, turn
the pressure control knob to high pressure. (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 10.
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 and disconnect power from unit.
6. Remove the retaining ring (4) from the connecting
rod (2) and slide the sleeve (3) down revealing the
connecting rod pin (1).
7. Remove the suction tube assembly from the fluid
pump (9) by unscrewing the suction nut (7) with the
packing adjustment tool. (865008).
8. 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.
9. Remove the connecting rod pin (1) out of the con-
necting rod (2), allowing the removal of the fluid
pump (9) from the machine.
ti16051a
Brush Kit
331780
