Required Tools | |||
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Tool | Part Number | Part Description | Qty |
A | FT-2674 | Vacuum Cap | 1 |
Start By:
a. Release the hydraulic system pressure.
NOTICE |
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Keep all parts clean from contaminants. Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components. To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly. Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination. |
NOTICE |
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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. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
- Remove bolts (2) to remove access cover (1) that is under the main control valve.
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Illustration 2 g00690963 - Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply
276 kPa to 414 kPa (40 psi to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.Note: A small amount of oil will drain from all the hose assemblies when the hose assemblies are disconnected from the pilot manifold. Make sure that you contain the hydraulic oil.
- Put identification marks for all the hose assemblies that are connected to the pilot manifold for installation purposes.
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Illustration 3 g06035116 - Disconnect harness assemblies (3) from control manifold (5).
- Disconnect hose assemblies (4).
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Illustration 4 g06036629 - Disconnect hose assemblies (6), (7), (8), (9), (10), (11), and (12).
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Illustration 5 g06036631 - Disconnect hose assemblies (13), (14), (15), (16), (17), (18), and (19).
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Illustration 6 g06036632 - Disconnect hose assembly (20). Remove bolts (21) and control manifold (5).
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Illustration 1 | g00704703 |
NOTICE |
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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. |
- Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply
276 kPa to 414 kPa (40 psi to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.Show/hide tableIllustration 8 g06036632 - Position control manifold (5) and install bolts (21). Connect hose assembly (20).
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Illustration 9 g06036631 - Connect hose assemblies (13), (14), (15), (16), (17), (18), and (19).
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Illustration 10 g06036629 - Connect hose assemblies (6), (7), (8), (9), (10), (11), and (12).
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Illustration 11 g06035116 - Connect hose assemblies (4).
Note: A small amount of oil will drain from all the hose assemblies when the plugs are removed from the hose assemblies. Make sure that you contain the hydraulic oil.
- Connect harness assemblies (3) to the control manifold (5).
- Remove Tooling (A) and install the cap to the hydraulic tank.
- Install high efficiency filters in place of the pilot filter, the case drain filter, and the return filter.
Note: High efficiency filters should not be run for more than 250 hours before you change back to the standard filters.
Show/hide tableIllustration 12 g00704703 - Position access cover (1) and install bolts (2) under the main control valve.
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Illustration 7 | g00690963 |