Technical data

Before doing this procedure, follow the Pressure

Relief Procedure Warning on page 13 to reduce

the risk of an injection injury, injury from moving

For checking armature, motor winding and brush elec-

trical continuity.

setup

Remove the drive housing from the sprayer as des-

cribed in “Drive Housing Replacement”, Steps l-6,

page 29.

Remove the pressure control cover and screws, the

motor cover, the fan cover (FI, and the inspection

covers (J). See Fig 7.

Disconnect the two leads from the motor to the bridge

KICW. See Fig 8 and 9.

Armature Short Circuit Test

Quickly turn the motor fan by hand.

lf there are no

shorts, the motor will coast two or three revolutions

before coming to a complete stop.

If the motor does not spin freely and resists rotation, the

armature is shorted and the motor must be replaced.

See page 36.

Armature, Brushes, and Motor Wiring Open

Circuit Test (Continuity)

Connect the two black motor leads together with a test

lead.

Turn the motor fan by hand at about two revolutions

per second.

If there is uneven or no turning resistance, check the

following: a1 broken brush springs; b) broken brush

leads; c) loose brush terminal screws; d) worn brushes;

e) broken motor leads; f) loose motor lead terminals.

Repair parts as needed. See page 22.

If there is still uneven or no turning resistance, replace

the motor. See page 30.

Fig 7

308

Fig 8

820-047