Helix 23
GB
Servicing
9.3 Replacing the Transducers (Fig. 19/20)
1. Disconnect the power cord.
2. Loosen the hex nut (g. 19, item 1) in between the PRIME/
SPRAY manifold and the heater block. Loosen it just enough
so that it can be moved by hand.
1
i
Component Pump (B) has been removed from the
graphic below for instructional purposes only. You
will not have to remove the component pump to
complete these steps.
3. Loosen and remove the two screws (g. 20, item 2) that secure
the front top cover (3) to the heater block and the four screws
(4) that secure the rear top cover (5) to the heater block.
Remove both covers from the heater block.
4. Disconnect the hose from the uid section (6). Disconnect the
hose from the valve at the front of the heater block (7). Leave
the hoses attached to the PRIME/SPRAY manifold (8).
4. Loosen and remove the two PRIME/SPRAY knob manifold
screws (9). Be careful not to lose the at or lock washers.
5. Pull the PRIME/SPRAY manifold (8), with tranducer assembly
(10) still attached forward. The transducer connection should
be visible inside the heater block at the rear (11).
6. Disconnect the transducer cord from rear of the connector
inside the heater block (11).
7. Fully unthread the transducer assembly (10) from the PRIME/
SPRAY manifold (8).
8. Thread the new transducer assembly (10) into the PRIME/
SPRAY manifold (8). Run the transducer wire through the
grommit (12) in the front of the heater block and reconnect to
its connection at the rear of the heater block (11).
9. Replace the PRIME/SPRAY manifold (8). Secure with the two
PRIME/SPRAY manifold screws (9).
10. Reconnect the hoses at the block heater valves (6) and the
uid section (7).
11. Replace the front top cover (3) and the rear top cover (4).
Secure with the screws.
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5
2
3
8
10
9
6
7
11
12
9.4 Replacing the PRIME/SPRAY valve (Fig. 21)
Perform the following procedure using PRIME/
SPRAY valve replacement kit P/N 800-915.
1. Use a drift punch of 2 mm to remove the grooved pin (1) from
the relief valve handle (2).
2. Remove the relief valve handle (2) and cam base (3).
3. Using a wrench, remove the valve housing (4).
4. Ensure that the seal (5) is seated correctly, then screw the
new valve housing (4) completely into the block (6). Tighten
securely with a wrench.
5. Align the cam base (3) with the hole in the block (6). Lubricate
the cam base with grease and slide on the cam base.
6. Bring the hole in the valve shaft (7) and in the relief valve
handle (2) into alignment.
7. Insert the grooved pin (1) to secure the relief valve handle in
position.
5
6
7
3
8
4
2
1
