725 and 730 Articulated Trucks Machine Systems Caterpillar

Counterbalance Valve (Tailgate) - Remove

Usage:

725 AFX

Removal Procedure

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At operating temperature, the hydraulic tank is hot and under pressure.
Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.

Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure.

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NOTICE

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.

Put identification marks on all lines, hoses, wires, and tubes for installation purposes. Plug all lines, hoses and tubes. This helps prevent fluid loss and contamination of the oil system.
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Illustration 1 g00512681
Attach nylon lifting straps (1) to tailgate (2).
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Illustration 2 g00512676
Loosen retaining nut (5) in order to disconnect hydraulic hose (6) from adapter (4). Loosen retaining nut (7) in order to disconnect hydraulic hose (6) from counterbalance valve (3). Remove hose (6) from the machine.
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Illustration 3 g00512677
Loosen retaining nut (9) in order to disconnect hydraulic hose (10) from adapter (8).
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Illustration 4 g00512678
Loosen retaining nut (11) in order to disconnect hydraulic hose (12) from counterbalance valve (3).
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Illustration 5 g00512679
Remove banjo bolt (14) and the two bonded seals that secure counterbalance valve (3) to hydraulic cylinder (13). Remove counterbalance valve (3) from hydraulic cylinder (13).
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Illustration 6 g00512680
Remove plug (15) and O-ring seal (16) from counterbalance valve (3). Remove the O-ring seal from plug (15). Note the location of bonded seals (17) and (18) for installation purposes. Remove bonded seals (17) and (18) from banjo bolt (14).