Maintenance
3A1190H
15
6. If gear grease needs replacing, replace with gear
grease (Part No. 114819).
7. Clean mating surfaces of cover and box thoroughly.
use Part No. 342899 Instant Gasket.
8. Reassemble in reverse order.
Replacement of Electrical
Components
Anytime the pressure control assembly, sensor, or both
are replaced, perform the calibrations.
Pressure Control Assembly (Electrical
Control Board)
1. Unplug machine’s power cord.
2. Remove six screws heatsink housing.
3. Disconnect all leads from pressure control
assembly.
4. Reassemble in reverse order
5. Torque to 30 ft-lbs.
NOTE:
Ensure ground lead (A) is connected to bolt
below control board.
Sensor
1. Remove the four screws, heatsink, and lower the
pressure control assembly.
2. Disconnect sensor lead from the board.
3. Unscrew sensor by holding sensor with 3/4” wrench.
4. Reassemble in reverse order. Torque to 30 ft-lbs.
Potentiometer
1. Lower pressure control assembly as described
above.
2. Disconnect potentiometer lead from pressure con
trol assembly.
3. Use a 1/16” allen wrench, loosen set screw in the
poteniometer knob and remove knob and spacer.
4. Using a 1/2” wrench or deep socket, remove the nut
from the potentiometer shaft assembly.
5. Pull entire potentiometer assembly out of the termi
nal box.
6. Replace in reverse order.
To avoid electric shock, always unplug the electrical
cord before servicing the machine.
1
2
18
4
17
16
15
14
6
5
7
8
13
10
11
12
2
1
ti16058b
NOTICE
Unit will not operate if wires are disconnected or
pinched. Upon reassembly, ensure all wires are con
nected and not pinched.
NOTICE
Unit will not operate if wires are disconnected or
pinched. Upon reassembly, ensure all wires are con
nected and not pinched.
NOTICE
Unit will not operate if wires are disconnected or
pinched. Upon reassembly, ensure all wires are con
nected and not pinched.
ti26349a
