315B Excavator Excavator Systems Caterpillar

Installation Procedure

1. Be sure that the pin bores in the boom cylinders, the boom and the frame are clean and free of dirt prior to installation of the boom cylinders.

2. Fasten lifting straps and a hoist to right hand boom cylinder (4) . Place the boom cylinder in position in the frame. Be sure that the pin bores in the boom cylinder and the pin bores in the frame are aligned with each other.

3. Apply 5P-0960 Molybdenum Grease on pin assembly (6) that holds the boom cylinder to the frame. Temporarily install the pin assembly. Do not remove the hoist from the boom cylinder at this time.

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Illustration 1	g00363112
Top view of boom cylinder and frame

4. Slide the boom cylinder to one side until the boom cylinder makes contact with the frame. Measure the total clearance between the boom cylinder and the frame at the pin bore. The total clearance of measurement (a) plus measurement (b) must not be more than 1.0 mm (.04 inch). If the total clearance is less than 1.0 mm (.04 inch), the addition of shims between the boom cylinder and frame will not be required. If the total clearance is more than 1.0 mm (.04 inch), the addition of shims between the boom cylinder and frame will be required.

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Illustration 2	g00363115

5. Remove pin assembly (6) , if shims are required. Refer to Disassembly and Assembly, "Boom Cylinder - Remove" in this manual. Install the shims between the boom cylinder and the frame on the side opposite retaining bolt (7) . Install the spacer and the pin assembly. Install the washer and retaining bolt (7) . Tighten the retaining bolt to a torque of 325 ± 40 N·m (240 ± 30 lb ft).

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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 machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates.

6. Check the condition of the O-ring seals in hose assemblies (5) . If the seals are damaged, use new parts for replacement. Connect two hose assemblies (5) to the boom cylinder.

7. Install the left hand boom cylinder by repeating Steps 1 through 6 .

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Illustration 3	g00363116

8. Raise the rod end of the boom cylinders until the pin bores in the boom cylinders are aligned with the bore in the boom. Extend or retract the cylinder rods until the pin bores in the boom cylinders are aligned with the bore in the boom.

9. Apply 5P-0960 Molybdenum Grease on the support pin for the rod end of the boom cylinders. Install the support pin, two spacers, two retainer plates (2) , bolts (1) and the washers on the end of the support pin.

10. Connect lubrication hose assembly (3) at the rod end of each boom cylinder.

11. Fill the hydraulic oil tank with oil to the correct level. Lubricate the boom mounting pins and the boom cylinder mounting pins. Refer to Operation and Maintenance Manual for the correct procedure to fill the hydraulic oil tank.

12. Start the machine and run the machine at low idle speed. Move the control lever for the boom cylinders so that the cylinder rods extend to the halfway position. Retract the cylinder rods. The boom cylinders should be cycled in this manner for approximately ten cycles in order to remove the air from the hydraulic system.

13. Check the oil level in the hydraulic oil tank. If necessary, refill the hydraulic oil tank to the correct level. Refer to Operation and Maintenance Manual for the correct procedure for filling the hydraulic oil tank.