GEAR (24 TEETH) 3K7110 - Caterpillar

Remove Aftercooler
start by:a) remove air intake shutoff1. Drain the coolant from the cooling system. 2. Remove the two bolts to remove elbow (1) and a sleeve from the rear of the aftercooler housings. 3. Remove adapter (2) from the rear of aftercooler housings. 4. Disconnect tube assembly (3) from adapter (5) and the water temperature regulator housing. Remove the tube assembly from the engine.5. Remove all the bolts that hold elbow (4) in position and disconnect elbow (4) from adapter (5). 6. Remove the two bolts and remove adapter (5) from the front of the aftercooler housings. 7. Remove sleeve (7) from adapter (6) and remove adapter (6) from the front of the aftercooler housings. 8. Fasten a hoist to aftercooler housings (8) with tooling (A). Remove the bolts to remove aftercooler housings (8) from the engine. The weight of the 3508 Aftercooler Housings is 28 kg (62 lb.) and the 3512 Aftercooler Housings is 66 kg (145 lb.).
Be careful when the aftercooler core is removed because the lower rear part of the core is held in position by a connector and O-ring seals.
9. Fasten a hoist to strap (11) and remove the bolts and two plates that hold aftercooler core (10) in position. Remove aftercooler core (10) from the engine. The weight of the 3512 Aftercooler Core is 39 kg (85 lb.). The weight of the 3508 Aftercooler Core is 29 kg (65 lb.). The 3512 and 3508 Engines use the same aftercooler core but the 3508 Engines do not have pipes (9) at the ends of the core or the two plates to hold the core in position.10. Remove pipes (9) from the ends of the aftercooler core and remove the O-ring seals from the tubes. 11. Remove O-ring seals (12) from each end of the aftercooler core. Remove ring (13) to remove connector (14) from the aftercooler core. Remove the O-ring seals from the connector.Install Aftercooler
Clean and inspect all of the O-ring seals and gaskets. Make a replacement of any worn or damaged seals and gaskets. 1. Install the O-ring seals on connector (1) and put clean engine oil on the seals. Put connector (1) in position and install ring (2) to hold the connector in position.2. Install the O-ring seals on the ends of the aftercooler core and put clean engine oil on the seals.3. Install the O-ring seals on pipes (3) and put clean engine oil on the seals. Install pipes (3) on the ends of the 3512 Aftercooler Core only. 4. Fasten a hoist to aftercooler core (4) as shown and put it in position on the engine. Make sure connector (1) is correctly engaged with adapter (5) in the cylinder block. Install the bolts and plates to hold the core in position. The 3508 Engines do not use the plates.5. If the aftercooler housings were taken apart and new gaskets installed, cut the gaskets even with the bottom of the housings. 6. Fasten a hoist to aftercooler housings (6) with tooling