SEAL-O-RING 6V7661 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Coolant flow is balanced (fined tuned) by the placement of various size orifices in the cooling circuit. These are strategically placed to provide correct balance and flow. Do not change the position or the size of the orifices.
Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
Illustration 1 g00612570
Disconnect the coolant outlet from elbow (3).
Remove bolts (4) and the washer that holds tube (5) in place in the water temperature regulator housing.
Remove the bolts and the washers that hold tube (5) in place in the water pump and remove tube (5).
Remove tube assembly (2).
Remove elbows (1) and (6) from the water temperature regulator housing.
Illustration 2 g01303793
Remove tube (10) from the water temperature regulator housing and from the oil cooler.
Remove the bolts that hold flanges (7) in place. Remove the flanges and the tube.
Attach a suitable lifting device to water temperature regulator housing (8). The weight of water temperature regulator housing (8) is approximately 79 kg (174 lb). Remove the bolts that hold water temperature regulator housing (8) to fuel filter housing (9) and remove the water temperature regulator housing from the engine.
Illustration 3 g00612574
3612 Engine
Illustration 4 g00612577
3616 Engine
Water temperature regulator housing (8) can be installed backward. This can cause the engine to overheat. Mark the correct orientation for installation purposes. Water temperature regulator housing (8) has a boss that is assembled toward the rear of the engine.
Illustration 5 g00612573
Remove housing (11) and the gasket from housing (12).
Illustration 6 g00612580
Position the water temperature regulator housing in order to ensure that housing (12) faces downward.
Remove the nuts and cover (13) from housing (12).
Illustration 7 g00612581
Remove gasket (16) and water temperature regulators (15) from housing (12).
Remove studs (14) from housing (12).
Illustration 8 g00612584
Remove lip seals (17) from housing (12). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 221-8647 Seal Installer Gp 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Coolant flow is balanced (fined tuned) by the placement of various size orifices in the cooling circuit. These are strategically placed to provide correct balance and flow. Do not change the position or the size of the orifices.
Illustration 9 g00612584
Use Tooling (A) in order to install lip seals (17) in housing (12). Ensure that the lips of the seals are facing downward.
Illustration 10 g00612581
Install studs (14) in housing (12). Tighten the studs to a torque of 30 5 N m (22 4 lb ft).
Install water temperature regulators (15) in housing (12).
Place