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Log loaders: boom-package radius, bare-pin figures and attachment deductions

Log loaders should be compared at the actual working radius and lifting point, with the carrier, boom, grapple and applicable stability information identified. A hydraulic bare-pin figure is not automatically the allowable timber load. Tigercat’s 875E reference gives the butt-n-top/power-clam boom a 10.92 m maximum radius and 8,390 kg hydraulic bare-pin lift at 9.14 m. The live-heel package reaches 12.62 m and lists 7,480 kg on the same labeled hydraulic basis at 9.14 m. The 910 kg difference does not establish final allowable payload or every attachment deduction. The page also distinguishes 36,820 kg machine weight less attachment from 38,600 kg with the optional F7-163 arrangement, a 1,780 kg configuration difference. Keep reach, hydraulic force, stability, attachment inclusions and complete transport mass separate before choosing the loader or planning its interaction with stems, stockpiles and trucks.

Log loaders need a defined boom package and lifting point

875E hydraulic bare-pin entries at the same 9.14 m radius
Boom packageMaximum radiusHydraulic bare-pin lift at 9.14 m
Butt-n-top/power-clam10.92 m8,390 kg
Live heel12.62 m7,480 kg
Which equipment must be identified in a log-loader comparison?

Record the carrier, boom and heel arrangement, grapple, rotator and other fitted equipment with the applicable load information. Maximum reach cannot establish timber payload.

Select the configuration for the loading positions and support. Retain the actual material-handling method.

What does the 875E butt-n-top/power-clam entry state?

The Tigercat 875E product reference lists 10.92 m maximum radius and 8,390 kg hydraulic bare-pin lift at 9.14 m for that boom package. Keep radius and bare-pin basis with the figure. It does not state that 8,390 kg of timber is permitted at maximum reach or with every grapple and support arrangement.

How does the live-heel entry differ?

At the same 9.14 m radius, the live-heel listing falls from 8,390 to 7,480 kg hydraulic bare-pin lift even as maximum radius rises from 10.92 to 12.62 m; the added reach cannot be read as added load capacity at that position. Check stability and attachment-specific load information before planning the lift.

What does the 910 kg comparison prove?

Subtracting the two hydraulic bare-pin values at 9.14 m gives 8,390 − 7,480 = 910 kg. This is a comparison of the source’s labeled boom packages at that radius, not a timber-payload allowance. Use the complete applicable load and attachment information before deciding which arrangement supports the actual work or what deductions are required.

Distinguish heel geometry, stability and attachment inclusions

Is the heel another name for the boom base pivot?

The heel arrangement provides an additional contact or support relationship with the handled stem; it is not simply the main boom pivot on the carrier. Live-heel, power-clam, butt-n-top and processor arrangements have different geometry and duties.

Identify the actual heel package and operating method. An excavator-like shape cannot settle the handling arrangement.

Does a hydraulic bare-pin figure establish stability-limited capacity?

Hydraulic capability is one capacity limit. The complete applicable load information must also address the machine configuration, stability and operating conditions, with the attachment arrangement and required deductions. A number that is explicitly bare-pin cannot be silently relabelled as allowable timber mass or extended to every direction and height.

Should every grapple always be subtracted from every capacity?

Read inclusions and load point before applying deductions. Check included equipment before subtracting grapple mass.

Record actual grapple, rotator and link masses. Apply the source’s specified equipment basis and deductions.

Establish the actual transport load and landing arrangement

Which 875E weight should be used for transport planning?

The source distinguishes 36,820 kg less attachment from 38,600 kg with the optional F7-163 arrangement. Their difference is 1,780 kg, but neither number alone establishes a complete transported load when attachments or other items remain to be resolved. Identify the actual package and carrier arrangement before comparing payload, axle loads, dimensions and route requirements.

Does a track carrier automatically need less landing space?

Determine the actual machine footprint, working envelope, support and movement requirements, stockpile arrangement and truck positions. Tracks still need adequate space and ground support. Nominal reach does not eliminate clearance or traffic-separation requirements, and a longer boom cannot certify a weak or crowded landing as suitable.

How should truck and loader interaction be planned?

Use the actual operating area, communication, permitted loading positions and exclusion arrangements for the machines and loads. Keep people outside hazardous movement and handling zones and follow the applicable operating procedure. A well-positioned truck cannot compensate for an unsupported load configuration, while a capacity figure alone cannot establish a safe interaction layout.

Apply the operating scope and inspect the offered package

Which operating standard applies to a logging landing?

For covered US logging work, OSHA 1910.266 provides relevant requirements. Establish the actual operation and jurisdiction; timber handling at a mill or in another industry may fall under different provisions. A machine’s log-loader description does not by itself determine the governing rules or replace the site’s required procedures and competent supervision.

What should a used log-loader offer make explicit?

Require the precise boom and carrier package, installed handling equipment, load-information basis, condition findings and service scope. Examine structure, pins, drives, controls and running gear under the specified safe inspection method.

Separate verified configuration from production and repair assumptions. An empty demonstration cannot establish condition under the intended duty.

Compare forestry machines, material handlers and log grapples and loader heads. Browse machine classes.

Lay out the landing before choosing the boom

Mark the incoming timber, sorting positions, truck approach and loading location. Establish the permitted machine position and ground support, then compare the reach and load information through those positions. Maximum reach alone leaves the required working load and the space for a stem or grapple unanswered.

Identify the handling package and its contact with the timber. A live heel is not another name for the boom's base pivot; the fitted heel, grapple and rotator determine a different handling arrangement. Use the package's instructions and relevant load information rather than treating all excavator-shaped forestry carriers as the same loader.

Match the grapple and distinguish the capacity basis

Keep the grapple, rotator, link and other fitted equipment with their mass and interface requirements. Read whether a capacity is hydraulic bare-pin, a configured handling allowance or another stated quantity. Apply only the required deductions and retain the actual radius and support conditions.

A larger grapple can reduce remaining allowance without proving that it will complete the loading job faster.

For a powered head or processor arrangement, identify the hydraulic supply, controls, return and protection required by that approved package. A carrier offered as a loader is not automatically equipped for every processing head. Obtain the installed option and service information before pricing a change of duty.

Inspect the complete offered carrier

Assess the boom, stick, heel where fitted, grapple and rotator, including their pins, connections and required function checks. Keep the swing, running gear, hydraulic and structural findings separate. A repair to the grapple does not establish the condition of the carrier or its support at the landing.

Plan truck interaction and personnel separation with the permitted operating area and communication. Identify the transported configuration and separately carried equipment for the move. Price the tool package, needed repairs, service and transport together; the base machine's weight or a brief unloaded demonstration cannot establish the complete timber-handling installation.

Find log-loader model comparisons

Use the exact designation to find the relevant versions and source statements within each linked model section. Keep the fitted boom and grapple package with the comparison.