Bush Hog GHM 700, GHM 1900, GHM 1800, GHM 900 Blade Replacement, Belt Replacement, Belt Adjustment

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4-3 BLADE REPLACEMENT

The disc mower blades each have two cutting edges. When one edge becomes dull or damaged, remove the bolt and turn the blade over, Nuts can be re-used if not damaged. If both cutting edges of the blade have been used, the blades must be replaced. Always replace both blades on a spindle to retain balance. When replacing blades, the attaching bolt and nut should also be replaced. Use only genuine Bush Hog replacement parts. (Figure 4-2)

Figure 4-2

Blade Bolt

Blade Disc

Blade

Stop

When replacing blades, insure that

Bladeshoulder of blade nut is seated into the blade stop and blade disc.

Torque blade bolt to 50 ft. lbs. Strike nut with hammer and retorque.

Nut

4-5 BELT REPLACEMENT

Replacement belts are sold in matched sets. To maintain an equal amount of tension on each belt, replace all belts at same time. Use only genuine Bush Hog replacement parts. Replace as follows:

A. Remove belt shield cover.

B. Loosen jackshaft assembly pivot bolt, loosen jamnut, and turn adjusting nut (Figure 4-4) counter- clockwise to relieve belt tension.

C. Remove belts.

D. Install new matched set of belts.

E. Tighten adjusting nut until belts deflect 1/2” with 10 lbs. of force applied (Figure 4-3). Rotate belt pulleys 6 complete revolutions to seat the belts into the pulleys. Tighten adjusting nut a sec- ond time until belts deflect 1/2” with 10 lbs. of force applied. Tighten jam nut on adjusting nut and tighten assembly pivot bolt.

F. Install belt shield cover.

Figure 4-4 (8) Mast Pivot Grease Fitting

4-4 BELT ADJUSTMENT

Belt tension should be checked after first 2 hours of operation and thereafter every 40 hours to get maxi- mum life from drive belts and best performance from mower. To check adjustment, push upward through hole in bottom of belt shield with 10 lbs. of force. Belt should deflect approximately 1/2 inch (Figure 4-3). To increase tension, loosen jackshaft assembly pivot bolt, (Figure 4-8), loosen jam nut, and turn adjusting nut (Figure 4-4) clockwise. Tighten pivot bolt and jam nut.

Figure 4-3

Approximately 1/2”

Belt Tension Adjusting Nut

4-6 SPINDLE HOUSING REMOVAL AND REASSEMBLY

A. Lower cutter bar to rest on a flat surface that will support the entire length. (Figure 4-5)

B. Remove the cap and the blade disc assembly retaining nut on desired blade disc assembly. The outer gear housing assembly has the crop divider asembled to the blade disc assembly. The cap for the crop divider must be removed to provide access to the retaining nut.

STANDARD CROP DIVIDER - Detach the cap and cutter by removing the four (4) capscrews attaching the cap to the crop divider. (Figure 4-6)

Straight Edge

Ruler

OPTIONAL CROP DIVIDER - Remove cap by loos- ening jam nut, turn threaded rod counterclockwise so cap moves down on threaded rod approximately 1-1/2” tilt cap sideways and remove out the top of crop divider. (Figure 4-7)

10 lbs. of force

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Contents Bush HOG Congratulations Retail CUSTOMER’S Responsibility Under the Bush HOG Warranty Table of ContentsDisclaimer of Implied Warranties & Consequential Damages This Limited Warranty Shall not ApplyGHM HAY Mower Dealer Preparation Check ListImportant Safety Precautions Employee Tractor Operating Instructions EMPLOYERS, Employees and OperationsIntroduction Section Introduction and DescriptionWide Section Preparation for USETransport Lock Transporting General SafetySection Operating Instructions Cutting HeightSwath Board OperationSection Maintenance Maintenance Check ListUnhitching from Tractor and Storage Lubrication Figures 4-1a, b, c, d Spindle Housing Removal and Reassembly Blade ReplacementBelt Replacement Belt AdjustmentCurtain Removed To Show Details Only Cutter BAR Removal Cutter BAR InstallationProblem Probable Cause Remedy Troubleshooting12 Cutter Bar Arrangement and Blade Rotation ForwardSection Assembly Hydraulic Hose Restrictor Elbow Vent Plug Cylinder Butt End Safety Decals 86159 86118 50012616 78608 78786 50012615 American Torque SpecificationsBush HOG, L.L.C

GHM 1800, GHM 800, GHM 1900, GHM 700, GHM 900 specifications

Bush Hog is a renowned name in the agricultural industry, recognized for its commitment to quality and performance in land management equipment. The Bush Hog GHM series includes several models, including the GHM 900, GHM 700, GHM 1900, GHM 800, and GHM 1800, widely respected for their robust design and innovative technologies.

The GHM 900 is a standout model known for its versatility and power. Designed for heavy-duty cutting tasks, it features a high-strength steel frame that provides exceptional durability. Its cutting width is 90 inches, making it ideal for tackling larger fields and pasture areas efficiently. The innovative floating hitch system allows for smooth contour following, ensuring maximum effectiveness over varied terrain.

The GHM 700, with a cutting width of 72 inches, is a reliable choice for smaller farms. This model is equipped with a maintenance-free gearbox that minimizes downtime and enhances productivity. Its compact design makes it easy to maneuver in tight spaces while still delivering a powerful performance for medium-weight jobs.

The GHM 1900 is geared towards large-scale operations, boasting a cutting width of 100 inches. This model excels in cutting dense vegetation and overgrowth, making it perfect for extensive land management projects. The heavy-duty construction means it can withstand rigorous use, and its adjustable skid shoes facilitate precise cutting heights.

The GHM 800 combines power and efficiency with an 84-inch cutting width. Its reinforced deck design provides strong performance even in the toughest conditions. The GHM 800 is equipped with advanced blade technology, which enhances cutting efficiency while reducing the overall power needed to operate, leading to fuel savings.

Lastly, the GHM 1800 is distinguished by its 96-inch cutting width, ideal for large mowing jobs. This model showcases advanced features, including improved blade overlap and a high-visibility safety design that keeps operators aware of their surroundings. Its heavy-duty, reinforced construction ensures it can handle tough environments, while the adjustable cutting height feature offers versatility for a variety of cutting applications.

In summary, the Bush Hog GHM series stands out for its commitment to quality, innovative design, and capability to handle challenging jobs. Each model is tailored to meet specific needs, ensuring efficiency and effectiveness in land management tasks. Whether for small farms or large-scale operations, the GHM series continues to be a trusted choice for agricultural professionals.
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