Performance Series 450e
17
GB
Repairs at the unit
11.6 Replacing the Gears
1. Open the relief valve, valve position PRIME (
k
circulation), switch the unit OFF, and unplug the power
cord.
2. Loosen and remove the four motor cover screws (Fig. 16.
1). Remove the motor cover (2).
3. Disconnect the black and red wires coming from the gear
box housing.
4. Loosen and remove the four motor mounting screws (3).
5. Pull the motor (4) out of the gear box housing (5).
i
If the motor will not dislodge from the pump
housing:
• Remove the front cover plate.
• Using a rubber mallet, carefully tap on the
front of the motor crankshaft that extends
through the slider assembly.
6. Inspect the armature gear (6) on the end of the motor for
damage or excessive wear. If this gear is completely worn
out, replace the entire motor.
7. Remove and inspect the 2nd stage gear (7) for damage or
excessive wear. Replace if necessary.
8. Remove and inspect the crankshaft/gear assembly (8) for
damage or excessive wear. Replace if necessary.
9. Reassemble the pump by reversing the above steps.
During reassembly, make sure the thrust washer (9) is in
place.
i
Refill the gear box in the pump housing with five
ounces of Lubriplate GR132 (P/N 0293396).
1
2
3
4
6
7
8
9
5
11.7 Replacing the Transducer
1. Open the relief valve, valve position PRIME (
k
circulation), switch the unit OFF, and unplug the power
cord.
2. Loosen and remove the four front cover screws (Fig. 17,
Item 1). Remove the front cover (2).
3. Stop the sprayer at the bottom of its stroke so that the
piston is in its lowest position.
4. Tilt the sprayer back for easy access to the fluid section.
5. Using 3/8” a hex wrench, loosen and remove the two
pump manifold mounting screws (5).
6. Pull the pump manifold (6) down approximately 1.3 cm
from the pump housing to clear the transducer.
7. Slide the pump block and piston rod forward until the
piston rod is out of the T-slot (4) on the slider assembly
(3).
8. Using a wrench, remove the transducer assembly (8) from
the pump manifold.
9. Thread the new transducer assembly into the pump
manifold (6). Tighten securely with a wrench.
10. Reassemble the pump by reversing steps 2–7.
Make sure the transducer is aligned properly
with the hole in the pump manifold during
reassembly. Improper alignment may cause
damage to the transducer o-ring.
2
1
4
6
8
5
3
7
