- Felling Head:
- HF181 (S/N: CFG132-140,279-288,290-301,303-303,306-306,400-400,18500-18500,24700-24700)
Introduction
This special instruction contains five sections for reworking the HF181 Felling Heads for Feller Bunchers: ""Structural Reinforcements" ", ""Increase the Size of the Vent" ", ""Fabricate a Seal Retainer" ", ""End Play Adjustment" " and ""Change the Grease" ".
Do not perform any procedure in this publication until you understand the information that is contained in this publication.
Safety
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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 Society2501 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 LaborWashington, D.C. 20210 |
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Personal injury can result from flame cutting or welding on painted areas. The effect of gasses from burned paint is a hazard to the person doing the cutting or welding. Do not flame cut or weld on painted areas. |
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References
ReferenceRefer to Special Instructions, REHS1841, "General Welding Procedures" for additional welding instructions.
ReferenceGuide, SEBD0512, "Service Welding Guide".
Structural Reinforcements
The frame assembly may experience cracking in various locations on certain HF201 Felling Heads. The reinforcing plates will reduce cracking of the frame. Reinforcing plates will increase the service life of the frame.
Twelve plates must be fabricated for this procedure. Illustrations of the parts are included in this instruction. The locations for the plates are shown.
Rework Procedure
- Remove the felling head from the machine.
- Remove all hydraulic hoses from the felling head.
- Remove all hydraulic cylinders from the felling head.
- Remove all guards in order to access the hydraulic saw motor. Remove the saw motor.
- Clean all grease, oil, and debris from the felling head. Wash the felling head.
- Provide protection for all film groups near the areas that will be reworked on the felling head.
Fabricate Plates
Note: Fabricate all plates from ASTM A514 steel.
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Illustration 1 | g01389792 |
Plate (1) |
Note: All measurements from center line
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Illustration 2 | g01394337 |
Plates (2) . Two plates are required. |
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Illustration 3 | g01389794 |
Plate (3) |
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Illustration 4 | g01389797 |
Plate (4) Four plates are required. |
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Illustration 5 | g01389798 |
Plate (5) Four plates are required. |
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Illustration 6 | g01398642 |
Plate (6) Two plates are required. |
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Illustration 7 | g01398694 |
Plate (7) |
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Illustration 8 | g01398710 |
Plate (8) |
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Illustration 9 | g01398760 |
Plate (9) Two plates are required. |
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Illustration 10 | g01398802 |
Plate (10) |
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Illustration 11 | g01389802 |
Plate (11) |
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Illustration 12 | g01398944 |
Plate (12) |
Cut and Remove Plates
- Cut and remove existing plates. Refer to Illustration 13.
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Illustration 13 | g01389743 |
- Cut and remove the existing plates. Refer to Illustration 14.
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Illustration 14 | g01350689 |
- Cut frame assembly in order to allow placement of plates (7) .
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Illustration 15 | g01396362 |
Installation of Plates for Reinforcement of the Frame
- Fit Plate (1) to the frame assembly. Tack weld the plate to the frame.
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Illustration 16 | g01389816 |
(1) Plate |
- Fit Plate (2) to the frame assembly. Tack weld the plate to the frame.
Note: Install frame pins before plates (2) are fully welded.
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Illustration 17 | g01389848 |
(2) Plates |
- Fit Plate (3) to the frame assembly. Tack weld the plate to the frame.
Note: Install frame pins before plates (3) are fully welded.
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Illustration 18 | g01401505 |
(3) Plate |
- Fit Plates (4) to the frame assembly. Tack weld the plate to the frame.
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Illustration 19 | g01401506 |
(4) Plates |
- Fit Plates (5) to the frame assembly. Tack weld the plate to the frame.
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Illustration 20 | g01401507 |
(5) Plates |
- Fit Plates (6) to the frame assembly. Tack weld the plate to the frame.
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Illustration 21 | g01399004 |
(6) Plates |
- Fit Plates (7), (8), (9), (10), (11) and (12) to the frame assembly. Tack weld the plates to the frame.
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Illustration 22 | g01389742 |
Location of Plates |
- Location for Plates (9) to the frame assembly
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Illustration 23 | g01398994 |
- Location for Plates (10) and (11) to the frame assembly
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Illustration 24 | g01398997 |
- Location for Plate (12) to the frame assembly
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Illustration 25 | g01397628 |
Welding the Reinforcements
Use the following specifications for materials that are used for welding:
ANSI/AWS A5.17 F7A2-EM12K and F7A2-EM13K
ANSI/AWS A5.18 ER70S-2, ER70S-3, ER70S-6 and ER70C-6M
ANSI/AWS A5.20 E70T-1. E70T-5, E71T-1
Tensile Strength ... 428 MPa (62000 psi)
Yield Strength ... 345 MPa (50000 psi)
Elongation ... 22%
Impact Toughness at 29 °C (84 °F) ... 13.6 N·m (10 lb ft)
Use proper welding practices in order to ensure minimum distortion of the frame and pin boss. Weld all reinforcement plates with solid welds to the frame assembly. Specific welding instructions for each plate are included below.
After welding the plates to the frame, clean the felling head. Repaint the felling head. Reassemble the hydraulic cylinders and the hydraulic hoses.
Weld Instructions for Plate 1
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Illustration 26 | g01394623 |
Plate 1 |
Weld an 8 mm (0.32 inch) fillet weld around the plate. Refer to Illustration 26.
Weld Instructions for Plate 2
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Illustration 27 | g01402202 |
Plate 2 |
- Weld a 10 mm (0.39 inch) fillet weld around two plates. Refer to Illustration 27.
- Weld an 8 mm (0.32 inch) fillet weld around the boss.
- Weld an 8 mm (0.32 inch) fillet weld around holes in the plate.
Note: Install frame pins before plates (2) are fully welded.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plate 3
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Illustration 28 | g01351254 |
Plate 3 |
- Weld a 10 mm (0.39 inch) fillet weld around the plate. Refer to Illustration 28.
- Weld an 8 mm (0.32 inch) fillet weld around the boss.
- Weld an 8 mm (0.32 inch) fillet weld around holes in the plate.
Note: Install frame pins before plates (4) are fully welded.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plates 4
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Illustration 29 | g01396617 |
Plates 4 |
- Weld a 10 mm (0.39 inch) fillet weld around the plate. Refer to Illustration 29.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plates 5
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Illustration 30 | g01396642 |
Plates 5 |
- Weld a 10 mm (0.39 inch) fillet weld around the plate. Refer to Illustration 30.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plate 6
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Illustration 31 | g01396896 |
Plates6 |
- Weld a 10 mm (0.39 inch) fillet weld around the plate. Refer to Illustration 31.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plates 7 and 8
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Illustration 32 | g01396994 |
Plates 7 and 8 |
- Weld a 10 mm (0.39 inch) fillet weld around the plate. Refer to Illustration 32.
- Weld an 6 mm (0.24 inch)weld around the plate.
Note: Make a single pass weld. Make sure that the edges do not burn.
Weld Instructions for Plates 9, 10, 11
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Illustration 33 | g01397604 |
- Weld a 10 mm (0.39 inch) fillet weld around the plates. Refer to Illustration 33.
- Weld an 8 mm (0.32 inch) fillet weld around the plates.
Weld Instructions for Plate 12
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Illustration 34 | g01397619 |
- Weld a 10 mm (0.39 inch) fillet weld around the plates. Refer to Illustration 34.
Increase the Size of the Vent
Reference Number     | Part Number     | Description     | Quantity     |
1     | 8L-3282     | Connector     | 2     |
2     | 9K-7638     | Hose Assembly     | 1     |
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Illustration 35 | g01354127 |
- Remove original 185-1833 Hose Assembly .
- Drill and tap two locations with 3/8-18 NPTF threads.
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Illustration 36 | g01354131 |
- Screw two 8L-3282 Connectors (1) into 3/8-18 NPTF threaded locations.
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Illustration 37 | g01401817 |
- Install new 9K-7638 Hose Assembly (2) to 9/16-18 JIC threads by using standard torque.
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Illustration 38 | g01401815 |
Fabricate a Seal Retainer
Reference Number     | Part Number     | Description     | Quantity     |
1     | 8T-4171     | Bolt     | 6     |
2     | 5C-0609     | Nut     | 6     |
Note: Fabricate all plates from ASTM A514 steel.
- Fabricate ring retainers.
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Illustration 39 | g01385569 |
4 mm (0.157 inch) thick (A) 110.4 mm (4.346 inch) (B) 90 mm (3.543 inch) (C) 62.5 mm (2.461 inch) (D) 55 mm (2.1654 inch) (E) 110 mm (4.331 inch) (F) 125 mm (4.921 inch) (G) 6.6 mm (0.260 inch) radius (2 places) (H) 95.3 mm (3.752 inch) (J) 75.5 mm (2.972 inch) (K) 40.2 mm (1.583 inch) (L) 2.5 ± 0.5 mm (0.098 ± 0.020 inch) at 45 degrees |
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Illustration 40 | g01384436 |
- Fabricate the ring plate.
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Illustration 41 | g01385571 |
3 mm (0.118 inch) thick (A) 6.6 mm (0.260 inch) radius (6 places) (B) 20.4 mm (0.803 inch) (C) 115.7 mm (4.555 inch) (D) 178 mm (7.008 inch) radius (E) 250 mm (9.842 inch) radius (F) 40.2 mm (1.583 inch) (G) 75.5 mm (2.972 inch) (H) 90 mm (3.543 inch) (I) 110.4 mm (4.344 inch) |
- Position ring retainers and the ring plate on the housing for the arbor.
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Illustration 42 | g01384438 |
- Use bolts (1) and nuts (2) to attach ring retainers to the ring plate.
- Tack weld (3) sides of ring retainers to housing. Remove the ring plate to complete welds.
- Use 0.035 mm (0.0014 inch) wire for the weld. Welds are 20 mm (0.787 inch) in length. Weld in the chamfer of the outside diameter of the saw housing. Weld in the chamfer of the inside diameter of the ring retainers.
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Illustration 43 | g01384439 |
Ring retainers with welds |
- Grind the welds flush with the housing and ring retainers.
Note: Install the ring plate before installing the shaft for the saw.
Note: Apply Loctite to the bolts of the retainer plate.
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Illustration 44 | g01384444 |
End Play Adjustment
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Illustration 45 | g01061813 |
Apply 9S-3263 Thread Lock Compound to the bolt threads prior to assembly.
(1) Torque for the bolts ... 100 ± 10 N·m
(74 ± 7 lb ft)
Apply 1P-0808 Multipurpose Grease to the following components that are listed below prior to assembly.
- Outside surface of bearing cup (3)
- Outside surface of bearing cup (6)
- Outside surface of lip seal (8)
In order to achieve the proper bearing end play, perform the procedure that follows.
- Install bearing cup (3) and bearing cup (6). Use the proper bearing driver in order to seat bearing cups (3) and (6) properly into the bearing housing.
- Lubricate the sealing lip of lip seal (8) lightly with 1P-0808 Multipurpose Grease .
- Install lip seal (8) into the bearing housing with the proper driver. Seat lip seal (8). Refer to detail (A) .
- Lubricate the inside of the lip seal (8) lightly with 1P-0808 Multipurpose Grease prior to assembly.
- Lubricate lower bearing cone (7). Install lower bearing cone (7) onto drive shaft (5). Use the proper bearing driver in order to locate lower bearing cone (7) onto drive shaft (5) .
- Protect the threads of drive shaft (5) and install drive shaft (5) until lower bearing cone (7) seats to bearing cup (6) .
- Lubricate upper bearing cone (4). Install upper bearing cone (4) onto drive shaft (5). Use the proper bearing driver in order to locate upper bearing cone (4) onto drive shaft (5) .
- Apply 4C-5591 Anti-Seize Compound (Thread Lubricant) to the threads of locknut (2). Install locknut (2) onto drive shaft (5) with 186-3646 Wrench . Tighten locknut (2) to a minimum torque of 490 N·m (360 lb ft).
Note: Locknut (2) uses left hand threads.
- Apply 9S-3263 Thread Lock Compound to the threads of four bolts (1) .
Note: The end play can not be measured unless the output shaft is pressed downward in order to move the bearing cone relative to the shaft. It is not necessary to press the shaft downward because normal operating loads will cause this movement in order to create the desired end play.
- Use Tooling 186-3646 Wrench in order to turn locknut (2). Adjust locknut (2) by 1/32 of a turn clockwise in order to obtain the desired bearing end play of 0.076 to 0.127 mm (0.003 to 0.005 inch).
Note: The end play can not be measured unless the output shaft is pressed downward in order to move the bearing cone relative to the shaft. It is not necessary to press the shaft downward because normal operating loads will cause this movement in order to create the desired end play.
Note: Each graduation on Tooling 186-3646 Wrench represents 1/32 of a turn.
- Install four bolts (1) in locknut (2). Tighten to a torque of 100 ± 10 N·m (74 ± 7 lb ft).
- Prior to installation of retaining plate (10), clean all mounting surfaces of the disc saw blade, drive shaft (5) and retaining plate (10) .
- Use the proper guide rods in order to position the disc saw blade and retaining plate (10) onto drive shaft (5) .
- Apply 4C-5591 Anti-Seize Compound (Thread Lubricant) to the threads of bolts (9). Install bolts (9) and torque bolts (9) to 405 ± 40 N·m (300 ± 30 lb ft).
- Ensure that the disc saw blade rotates properly. The proper rotation of the disc saw blade is counterclockwise, when the disc saw blade is viewed from the bottom.
- Lubricate the splines on the shaft end at grease fitting (12) .
- Install plug (11) .
Change the Grease
Part Number     | Description     | Quantity     |
1P-0808     | Multipurpose Grease     | 6     |
Fill the bearing housing with 1P-0808 Multipurpose Grease . Approximately six tubes will be required to fill the housing.
- Fill the housing with grease. Rotate the shaft of the saw in order to help distribute grease.
- Fill the housing with grease until grease is expelled through the new vent.