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STEP 18: (HEATER PLUMBING
CONT'D)
18.6 Unplug and remove the temperature sending unit from
the thermostat housing.
18.7 Thread in the sending unit adapter using Teflon tape.
Ensure the threaded hole in the middle faces up. See
Figure 18.7.
18.8 Thread the 90° elbow into the middle threaded hole
using Teflon tape. See Figure 18.7.
18.9 Thread the hose nipple into the 90° elbow using Teflon
tape. See Figure 18.7.
18.10 Thread the temperature sending unit into the end of
the sending unit adapter using Teflon tape. See Figure
18.7. Re-connect the sending unit wiring.
18.11 From inside the cab, insert each end of the supplied
heater hose through each bushing in the floorboard and
route them inward toward the brake pedal and up
toward the engine. Use the natural curve of the hose to
take corners and prevent kinking.
18.12 Connect one end of the hose to the hose nipple with a
small hose clamp. See Figure 18.12.
18.13 Connect the other end of the hose to the tee fitting with
a small hose clamp. See Figure 18.13.
CAB INSTALLATION
90° Elbow
Sending Unit
Adapter
Fig. 18.7 (Heater Sending Unit Adapter Assembly)
Fig. 18.12 (Heater Supply Hose)
Fig. 18.13 (Heater Return Hose to Tee)
15 of 29
Hose Nipple
Sending Unit
Supply Hose
Return Hose
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