Hitachi L-8900 Service Manual page 100

1g. Apply Silicone compound (P/N 852-3526) to the surface
of a new Heater assembly (P/N 852-3519) thin and
evenly, and attach it to Heat Block (P/N 852-3514).
Then, dry it for 3 - 4 hours.
1h. Assembly in the reverse order of disassembly.
2. Oven temperature sensor replacing procedure
2a. Perform 1a - 1e of Heater replacing procedure.
2b. Remove 4 Fixing screws of Reaction bath main unit, pull
it toward you from Base plate (P/N 852-3501).
4 - 12
Apply Silicone compound thin and evenly
to the surface of Heater assembly.
Remove Fixing screw. (×4)