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The manual includes pictures and easy to follow directions on what tools are needed and how the repair is performed. Just imagine how much you can save by doing simple repairs yourself.
Many people buy this manual just to have it around for when the inevitable happens. Sooner or later, maintenance will need to be performed. The spacing is approximately the same length as the recoil spring assembly free length. Also, make sure that two adjustable supports 1 are positioned between the reaction plate and the movable plate, as shown.
Level the two supports. Note: The recoil spring assembly may be installed in Tooling A from the end. In this case, reaction plate 2 must be removed. Then reinstall the reaction plate after the recoil spring assembly is in place on two adjustable supports 1. NOTICE Do not remove the hoist from the recoil spring assembly until the unit is leveled, centered and locked in the specified tooling.
The combined weight of the recoil spring assembly is approximately kg lb. Fasten a suitable lifting device to the recoil spring assembly. Put the recoil spring assembly in position on two adjustable supports 1 in Tooling A.
Adjust the two adjustable supports in order to align the centerline of the recoil spring assembly with the centerline of Tooling A. The hoist has been removed from the recoil spring assembly in order to provide a better illustration of level gauge 4. Reposition the recoil spring assembly until the recoil spring assembly is level.
Reposition the recoil spring assembly until the retaining rod and nut 6 are centered in the hole in reaction plate 2. The recoil spring assembly is leveled by moving adjustable supports 1 higher or lower. After the recoil spring assembly is leveled and centered, install two pins 5 on the back side of reaction plate 2 , as shown.
Operate Tooling B enough to hold the recoil spring assembly in position between reaction plate 2 and movable plate 3. Make sure that the recoil spring assembly is level and centered. Several tons of force are required to compress the recoil spring during assembly. Do not compress the spring assembly until the covers on the tooling have been closed. It is possible for the recoil spring to twist under load and come out of the tooling resulting in injury or death.
Close covers 7 on Tooling A. Use Tooling B to compress the recoil spring assembly slightly. Through the opening in the end of Tooling A , remove the socket head bolts and lock strip 8 from the end of the retaining rod. Remove nut 6 with Tooling D.
Release the force on the recoil spring assembly. Open the covers on Tooling A. Fasten a suitable lifting device to the recoil spring assembly, and remove the recoil spring assembly from Tooling A. Separate the components of the recoil spring assembly.
Remove support 12 , spring 10 , support 9 , and rod Note: Prior to assembling the recoil spring assembly, make sure that Tooling A is on a level surface.
Check the condition of the threads on rod 11 and nut 6. If the threads are worn or damaged, use new parts for replacement. Assemble the recoil spring assembly loosely. Position spring 10 onto support 9. Align the pin bore in the rod end of the stick cylinder with the bores in the stick. Install a shim on both sides of the stick cylinder at the bore for the stick cylinder in the stick.
Put a thin coat of Tooling D on pin assembly 3. Install the spacer and pin assembly 3. Install bolt 2. Remove the suitable lifting device from stick cylinder 1. Fill the hydraulic oil tank with oil to the correct level. Lubricate the pins for the stick cylinder.
Start the machine and run the machine at low idle speed. Move the control lever for the stick cylinder so that the cylinder rod extends to the halfway position. Retract the cylinder rod. The stick should be cycled in this manner for approximately ten cycles to remove any air from the hydraulic system.
Recheck the oil level in the hydraulic oil tank. Copyright - Caterpillar Inc. Removal Procedure Start By: a. Remove the bucket. Start the machine. Fully retract the bucket cylinder. Secure the linkage to the stick. Fully extend the stick cylinder. Lower the stick to the floor.
Block the end of the stick that connects to the boom. Stop the engine. Remove retaining bolt 2 from pin assembly 3. Note: Shims are located between the stick cylinder and the stick at the pin bore. Remove pin assembly 3 and the spacer from the stick. Fully retract the stick cylinder.
Remove the shims that are located between the stick cylinder and the stick at the pin bore. At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns.
To prevent possible personal injury, release the pressure in the work tool hydraulic circuit boom, stick, bucket, and swing , travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.
Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch. Release hydraulic system pressure.
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.
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