SERVICE MANUALWATER PUMP, THERMOSTAT & IDLER PULLEYSSection 9REASSEMBLY AND INSTALLATIONReassemble and Install the Thermostat as follows:1.Install thermostat in housing.2.Place a new thermostat housing gasket ontohousing.3.Attach thermostat housing to cylinder head withtwo bolts and lock washers. Connect the hose.IDLER PULLEYSNOTE: For Fleetstar (2050) and Cargostar MotorTruck Applications equipped with DTI-466 or DT/DTI-466B & C engines a new air compressor Idler PulleyAssembly (Figure 26) has replaced the old styleassembly (Figure 27) in production and service.The new style features an idler pulley bearing shaftthat is mounted by a press fit into the idler pulleysupport bracket.New Style Idler Pulley is Effective on:DT-466B & C - S/N 82896 & upDTI-466B & C - S/N 83066 & upFigure 26. - New Style1.Ring, front retaining2.Pulley, air compressor idler3.Bearing (with shaft), idler4.Ring, rear retaining5.Bracket, idler support6.Bolt, 1/2 - 13 x 3/47.Washer, 1/2 hardenedFigure 27. - Displaced Style1.Shaft, idler pulley2.Shield, bearing3.Ring, retaining4.Bearing, idler5.Pulley, air compressor idler6.Bracket, idler support7.Jam nutCGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 17
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