2000/05/29 Caterpillar

Harvester Heads:

HH55 (PIN: 3MZ1-UP)

HH65 (PIN: 4RZ1-UP)

Description of Change: A second lubrication pump has been added to the feed roller arms. The addition of the second lubrication pump provides two independent lubrication systems for the pivot pins of the feed roller arms. The second pump improves lubrication to the bearings on the feed roller arms. The improved lubrication provides a longer service life of the bearing.

Adaptable To: The new 183-3742 Lubrication Pump is effective with HH55 (PIN: 3MZ219-UP) and HH65 (PIN: 4RZ269-UP) Harvester Heads. The new pump is adaptable to first production of the listed harvester heads.

1. Refer to Service Manual module, RENR3007, "Disassembly and Assembly, HH45, HH55, HH65, and HH75 Harvester Head", "Preparation for Disassembly" for instruction on preparing the harvester head for disassembly.

   Fabrication of the Plate

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Illustration 1	g00704235
(A) 5 mm (0.20 inch). (B) 37.5 mm (1.50 inch). (C) 25 mm (1.00 inch). (D) 60 mm (2.36 inch). (E) 30 mm (1.18 inch). (F) 10 mm (0.39 inch). (G) 50 mm (1.97 inch). (H) 12.5 mm (0.5 inch). (I) 50 mm (2 inch). (J) 28 mm (1.125 inch) Diameter. (K) 5.2 mm (0.20 inch) Diameter (4 places).

2. A plate will need to be manufactured. The dimensions are shown in illustration 1. The plate can be made from any type of mild steel. Tap four M6X1 - 6H threads (K) .

   Modification Procedure for the Tank

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Personal injury or death can result from escaping fluid under pressure. Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak.

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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.

3. Remove all of the lines that are connected to the lubrication oil tank.

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Illustration 2	g00708159

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Illustration 3	g00708160

4. Remove the bolts that are shown in the above illustrations. Remove the lubrication oil tank.

5. Remove the existing lubrication pump assembly and remove the block for the oil supply to the saw chain.

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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc. Welding can cause fumes, burn skin and produce ultraviolet rays. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working. Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death. Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts. See "American National Standard Z49.1, Safety in Welding and Cutting" published by the American Welding Society. American Welding Society 2501 N.W. 7th Street Miami, Florida 33125 See "OSHA Safety and Health Standards, 29 CFR 1910", available from U.S. Department of Labor. U.S. Department of Labor Washington, D.C. 20210

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Illustration 4	g00703826
(L) 59 mm (2.32 inch). (M) 78.6 mm (3.09 inch).

6. Position the plate on the tank. The position is shown in illustration 4. Mark the holes.

7. Remove the plate and drill four M6 holes in the tank for the mounting bolts.

8. Weld the manufactured plate to the lubrication oil tank. The position is shown in illustration 4. Achieve a weld penetration of 3 mm (0.12 inch). Weld around the entire edge of the manufactured plate in order to prevent the leaking of lubrication oil.

9. Drill a 28 mm (1.125 inch) hole through the tank in the center of the manufactured plate.

10. Clean the lubrication oil tank. Remove all of the abrasive dust. Also remove all of the slag buildup and all of the weld splatter. Be sure that all the surfaces that contact fluid are free of corrosion.

11. Paint the modified areas in order to prevent corrosion.

    Pump Installation

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Illustration 5	g00703837
Right Lubrication Pump (1) 156-0979 Gasket. (2) 183-3749 Fitting. (3) 156-0980 Pipe. (4) 095-7952 Ring. (5) 156-0295 Strainer.

12. Install a 156-0295 Strainer (5) onto a 156-0980 Pipe (3) with a 095-7952 Ring (4) .

13. Install the pipe assembly into the left side of the tank with a 156-0979 Gasket (1) .

14. Install the new 183-3742 Lubrication Pump onto the left side of the lubrication oil tank. Use four 151-6282 Bolts and a 156-0979 Gasket .

15. Install the existing lubrication pump on the right side of the lubrication oil tank.

16. Remove the fitting on top of the existing lubrication pump. Install a 183-3749 Fitting (2) on the existing lubrication pump in place of the fitting.

17. Install a 156-0985 Fitting with a 6V-0405 Seal on top of each lubrication pump.

    Connections for the Hose Assemblies

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Illustration 6	g00703850
(6) Block. (7) Bolts.

18. Bolt block (6) to the lubrication oil tank with four bolts (7). Use 4C-9501 Gasket Sealant on the mating faces.

19. Remove the needle valves. Remove all hose assemblies and parts between the needle valves and the lubrication pumps. Discard parts.

20. Remove the hose assembly that connects from the manifold on the left side of the head to the original lubrication pump. Remove the elbow from the manifold.

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Illustration 7	g00703910
Left Lubrication Pump (8) 156-0995 Elbow Fitting. (9) 6V-0405 Seal. (10) 156-1237 Tee Fitting.

21. Install 156-0995 Elbow Fitting (8) with a 6V-0405 Seal (9) onto the bottom of the left lubrication pump. Install a 156-1237 Tee Fitting (10) into the 156-0995 Elbow Fitting .

22. Install a 156-0995 Elbow Fitting onto the bottom of the right lubrication pump with a 6V-0405 Seal .

23. Install the lubrication oil tank into the frame.

    Hose Installation

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Illustration 8	g00708203
Left Side of the Lubrication Tank

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Illustration 9	g00708205
Right Side of the Lubrication Tank (11) 156-0990 Hose Assemblies. (12) 157-2691 Fitting. (13) 157-2689 Hose Assembly. (14) Hose Assembly.

24. Install 156-2689 Hose Assembly (13) from the tee on the left pump to the elbow on the bottom right pump.

25. Install a 157-2691 Fitting (12) onto the top of the left lubrication pump.

26. Install 156-0990 Hose Assembly (11) from the left lubrication pump to the pivot pin for the left feed roller arm. Use the existing bolt and the existing washer.

27. Connect hose assembly (14) that is used for lubrication of the saw chain to the manifold.

28. Install a 157-2691 Fitting (12) onto the right lubrication pump.

29. Connect 156-0990 Hose Assembly (11) from the right lubrication pump to the pivot pin for the right feed roller arm. Use the existing bolt and the existing washer.

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Illustration 10	g00711619
(15) 157-2633 Hose Assembly. (16) 156-0985 Fitting and 6V-0405 Seal .

30. Install a 156-0985 Fitting and a 6V-0405 Seal (16) into the manifold.

31. Install 157-2633 Hose Assembly (15) between the manifold and the tee on the bottom of the left lubrication pump.