307B Excavator Machine Systems Caterpillar

Swing Boom - Install

Usage:

307B 6KZ

Installation Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	8S-7640	Stand	1
	8S-7621	Tube	1
	8S-7615	Pin	1
	8S-8048	Saddle	1
B	140-7742	Protective Sleeve	1

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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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Apply 5P-0960 Molybdenum Grease in the pin bore at the foot of the boom and on the lip seals.
Note: Be sure that the pin bores in the boom and the frame are clean and free of dirt prior to the installation of the boom.
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Illustration 1 g00878496
Attach a suitable lifting device to the boom. Use Tooling (B) in order to reinforce the lifting strap.
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Illustration 2 g00547782
Slide the boom to one side until the boom makes contact with the boom swing support. Measure the total clearance between the boom and the support at the pin bore. The total clearance of Measurement (a) plus Measurement (b) must not be more than 1.0 mm (0.04 inch). If the total clearance is less than 1.0 mm (0.04 inch) the addition of shims will not be required. Apply 5P-0960 Molybdenum Grease on pin assembly (9) and install the pin.
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Illustration 3 g00547207
If the total clearance is more than 1.0 mm (0.04 inch) the addition of shims will be required. Install the shims between the boom and the boom swing support on the side opposite bolt (7) and washer (8). Apply 5P-0960 Molybdenum Grease on pin assembly (9) and install the pin. Install washer (8) and retaining bolt (7). Tighten the retaining bolt to a torque of 100 ± 20 N·m (75 ± 15 lb ft).
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Illustration 4 g00547182
Check the condition of the O-ring seals that are used in the ends of hose assemblies (3) and (6). If the seals are damaged, use new parts for replacement. Connect hose assemblies (3) and (6).
Connect harness assembly (4) and install bolt (5).
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Illustration 5 g00546576
Extend the boom cylinder. Attach a suitable lifting device to the boom cylinder. Position the boom cylinder between the pin bores in the boom. Apply 5P-0960 Molybdenum Grease on support pin (2) and install the pin. Install the retaining bolt and nuts (1).
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Illustration 6 g00357378
Tighten the outside nut until the nut is 0.5 mm (0.02 inch) beyond the end of the retaining bolt, as shown. Tighten the inside nut against the outside nut to a torque of 70 ± 15 N·m (50 ± 10 lb ft).
Lubricate the boom cylinder pin and the pin joint for the boom foot. Refer to Operation and Maintenance Manual, SEBU7421, "Boom and Stick Linkage - Lubricate" for the correct procedure.