LOGGING EQUIPMENT
PROCEDURES

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Introduction
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Pulp & Paper Procedures

HOGS TEETH:

1)         Make sure all hard facing has been worn away or removed.

2)         Rebuild to desired shape and size with Postalloy 2865-FCO, .045” or 1/16" (1.2 or 1.6 mm) diameter , except for the working face which should be 1/8" to 3/16" undersize (3.2 to 4.8 mm).

3)         Place a stringer bead on the edges of the working face using .045" or 1/16" (1.2 or 1.6 mm) diameter, Postalloy 2834-SPL.

4)         Apply two thin layers to the face using 2834-SPL, using 1/2" to 3/4" (12 to 18 mm) weave beads.

5)         Place a final stringer bead on the edge of the working face.

HOG ANVILS:

1)         Use carbon steel plates to form the original size and shape of the anvil and preheat the assembly to 800º·- 1000ºF (427º - 538ºC).

2)         Rebuild to desired size using 1/16“ (1.6 mm) Postalloy 2834-SPL, and weave beads of 1/2" to 3/4" wide (12 to 18 mm).

3)         Grind edges sharp before use.

HOG Rotors:

1)         Using 1/16" or 7/64" (1.6 or 2.8 mm) diameter, Postalloy 2865-FCO, restore worn metal around slots to desired size.

2)         Overlay the entire surface with 2865-FCO using stringer beads.  While this may be accomplished semi-automatically, it is more economical to automate.

Specialized equipment is needed to automatically adjust the process for the changing diameter and holes of the rotors.

KNIVES:

1)         Weld a weave bead, 3/4" to 1" wide (18 to 25 mm), on the cutting edge of the hog rotor anvil knives using Postalloy 2836-SPL, .045” or 1/16" (1.2 or 1.6 mm) diameter.

2)         Weld a fine stringer bead on very edge of the knife and sharpen by grinding the beveled side.

KNIFE KEEPERS:

1)         Overlay the entire wearing surface with 1/2" to 3/4" (12 to 18 mm) wide weave beads using 1/16" or 7/64" (1.6 or 2.8 mm), Postalloy 2834-SPL.

2)         Be careful to first place a stringer bead around the circumference of the bolt holes.

WHEELS: (Logging Arch, Saw Carriage)

1)         Place in a positioner or other device so that the wheel may be rotated.  While it may be acceptable to rebuild semi-automatically, it is usually better to use an automatic setup.

2)         Clean off the surface and remove any defective metal.

3)         Rebuild to within 3/16" or 1/4" (4.8 to 6.0 mm) of the finished dimension using a 3/32" (2.4 mm) diameter, low alloy build up wire of 30 to 35 Rc hardness, Postalloy 2930SA.

4)         Overlay to slightly oversize using a wire of 40 to 45 Rc hardness, Postalloy 2945SA.

5)         Machine to finished size.

LOG GRAPPLE:

New:

1)         Weld a stringer bead along the edge of the working face using a 1/16“ (1.6 mm) diameter, Postalloy 2829-SPL, 2832-SPL, or 2834-SPL.

2)         Weld stringer beads across the face spaced at a distance equal to the width of the grapple face.

3)         Weld diagonals between the corners of the outlined squares with stringer beads.

This type of overlay will improve both the life of the grapple and the gripping action.

DEBARKING HAMMERS:

1)         Overlay hammer heels with Postalloy 2820-SPL or 2871-SPL, 045" or 1/16" (1.2 or 1.6 mm) diameter.

2)         Overlay hammer tips using Postalloy 2836-SPL.

ROTOR KNIVES:

1)         Overlay the cutting edges and points of the knives using .045” or 1/16" (1.2 or 1.6 mm) diameter, Postalloy 2836-SPL, or 2834-SPL.

2)         Weld a stringer bead on the side of the cutting edges about 2" (50 mm) in both directions from the point.

3)         Using a weave bead overlay from the point to the end of the stringer beads.

4)         Weld a second layer from the point about 1" (25 mm) in both directions.

ROTARY CHIPPER KNIVES:

1)         Cut or groove 1/8" to 3/16" (3.2 to 4.8 mm) deep, and about 1/2" (12 mm) wide, off the surface of the cutting edge.

2)         Using .045” (1.2 mm) diameter, Postalloy 2820-SPL or Cobalt, 2501-SPL and a weave bead technique, apply a two layer deposit.  Preheat to 600ºF(316ºC) to minimize cracking.

3)         Grind to sharpen edge.

SPROCKETS, GEARS, TUMBLERS:

1)         Remove all damaged, cracked or mushroomed metal.

2)         Replace severely worn or broken teeth or tumblers with flame cut and shaped C1045 steel.  Join using Postalloy 30-FCG or 3044-FCG.

3)         Build up worn parts to within 3/16" (4.8 mm) of the finished size, using 045" or 1/16" (1.2 or 1.6 mm) build up wire of 35 to 40 Rc, Postalloy 2892-SPL.

4)         Finish to size using a 500ºF (260ºC) preheat and welding with a 1/16" (1.6 mm) diameter tool steel wire, Postalloy 2871-SPL.

5)         Outline the area to be welded first with a stringer bead.

6)         Fill in the outlined area using 1/2" to 3/4" (12 to 18 mm) wide weave beads in the transverse direction.

Join manganese to manganese with 2850-FCO

Join manganese to carbon or low alloy steels with 285-FCO, 285-SPL, or 2865-FCO, 2866-FCO.

Join stainless to itself or to other base metals with 30-SPL, 30-FCG, or 2866-FCO.

Join carbon and low alloy steels with 306-FCO or 3044-FCG

Join high carbon steels and tool steels with 30-FCG or 30-SPL.