Replacement Of Electrical Control Board - AIRLESSCO 3A1186F Manual

Maintenance
Packing Adjustment Tool, tighten another 3/4 of a
turn.
18. Reinstall Fluid Pump, page 11.
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ti16056c
Replacement of Electrical
Control Board
1. Remove electrical cover.
2. Disconnect sensor lead from Electrical Board.
3. Disconnect two clutch leads on Electrical Board
from leads on clutch.
4. Using a 1/16" allen, loosen set screw in Pressure
Control Knob and remove knob.
5. Using a 1/2" nutdriver or 1/2" deep socket, remove
nut from pressure control shaft. This will allow
removal of electrical control board from frame.
6. Replace Electrical Board Assembly in reverse order.
Adjust pressure. See Pressure Calibration of the
Electrical Control Board, page 14.
Pressure Calibration of the
Electrical Control Board
1. Turn "Pressure Calibration" Trimpot adjustment on
electrical control board in the counter clockwise
direction at least 15 revolutions.
2. Connect 5000 psi glycerine pressure gauge on out-
let of pump between fluid pump and airless hose to
monitor Fluid Pump Pressure.
3. Start engine and run at maximum RPM. Turn prime
Valve to open (Prime) position. Turn Pressure Con-
trol Knob to maximum position (fully clockwise).
4. Using an insulated screwdriver adjust "Pressure
Calibration" Trimpot by turning clockwise until the
clutch engages. When the clutch engages the pump
will commence Priming. When pump is primed, turn
the Prime Valve to the Closed (Pressure) Position.
NOTE: The pump will begin to pressurize and the clutch
will disengage at a low pressure. Continue turning the
trimpot clockwise to increase pressure 3000 psi.
5. Trigger gun. The pressure should drop approxi-
mately 350-400 psi, the clutch will engage and build
pressure to 3000 psi and disengage. Trigger gun
several times to ensure proper pressure setting.
6. Turn Pressure Control Knob to minimum position.
The clutch should disengage and pump stop mov-
ing.
3A1186F