GUARD AS 1694979 - Caterpillar

Drain the coolant from the expansion tank into a suitable container for storage or for disposal.
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Remove bolts (2) and the washers. Carefully slide flange (1) down tube (3).
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Remove bolts (4), elbow (5), and tube (3).
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Remove bolts and washers (6). Remove flanges (8) and tubes (7).
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Remove bolts (9) from the top of the expansion tank. Install Tooling (A) in the holes.
Attach a suitable lifting device onto Tooling (A). The weight of the expansion tank is approximately 209 kg (460 lb).
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Remove bolts (10) and the washers. Remove expansion tank (11). Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 138-7573 Link Bracket 2
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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Remove bolts (9) from the top of the expansion tank. Install Tooling (A) in the holes.
Attach a suitable lifting device onto Tooling (A). The weight of the expansion tank is approximately 209 kg (460 lb).
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Position expansion tank (11) and install bolts (10) and the washers .
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Remove Tooling (A). Install bolts (9) in the holes.
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Inspect the seals for flanges (8). Obtain new seals, if necessary. Lubricate the bores of flanges (8) lightly with glycerin. Insert the seals into flanges (8). Install flanges (8) and tubes (7) with bolts (6).
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Inspect the O-ring seal for tube (3). Obtain a new O-ring seal, if necessary. Lubricate the bore of elbow (5) lightly with glycerin. Insert the O-ring seal into the bore of elbow (5). Insert tube (3) into the bore of elbow (5).
Inspect the seal for the joint between elbow (5) and the water pump. Obtain a new seal, if necessary. Place the seal onto the flange of elbow (5). Fasten elbow (5) to the water pump with bolts (4).
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Inspect the gasket for the joint between flange (1) and the expansion tank. Obtain a new gasket, if necessary. Insert the gasket into flange (1). Carefully slide flange (1) up tube (3). Fasten flange (1) with bolts (2) and the washers.
Fill the expansion tank to the correct level. For the proper coolant to use, refer to the Operation and Maintenance Manual for the engine that is being serviced.