The GRANDEMAC G.FM Series low-profile rear-mounted mower is a professional obstacle-avoidance cutting solution specially built for commercial orchards, vineyards and fruit plantations. Designed to attach to 25–50 HP tractors via standard Cat. I three-point linkage, this PTO-driven mower solves the biggest pain point of orchard maintenance: safely mowing close around tree trunks and vine stocks without damaging valuable plants.

Fitted with a sensitive side disc obstacle avoidance assembly, the cutting disc automatically retracts upon touching trunks or obstacles, then resets to the working position once clear. It completes inter-row and under-tree mowing in one pass, greatly cutting manual trimming work, herbicide reliance and overall farm operating cost. Its slim low-profile deck easily slips under low hanging canopies for thorough grass management.

Key Advantages

✅ Automatic Obstacle Avoidance Side DiscThe optional side sensing disc moves away on contact with tree trunks, boughs and stumps. It delivers close, clean cutting beside trees while protecting bark and avoiding collision damage to both crops and the machine.

✅ Low‑Profile Compact BodyUltra-low deck height adapts to narrow rows and low tree canopies, ideal for dense vineyards and dwarf fruit orchards where conventional mowers cannot reach.

✅ Flexible Cutting Height AdjustmentCutting height adjustable at 2 / 4 / 6 cm to suit your grass management strategy, whether for clean short cut or mulching vegetation to improve soil organic matter.

✅ Heavy‑Duty Articulated Blades & 540 RPM PTO DriveHigh-strength articulated blades shred grass and light weeds evenly. Standard 540 rpm PTO shaft delivers stable power transfer from your tractor for long continuous working hours.

✅ Protective Structure & Ground‑Follow DesignFixed front wheels, front chain guard and rear roller keep the deck stable, follow undulating ground contours and prevent scalping. The chain guard shields operators and components from flying debris.

✅ Upgrade Options AvailableSelect front swivel wheels for better maneuverability, or hydraulic side shift for flexible lateral adjustment when matching varied row spacing. Multiple working widths cover different plantation layouts.

Standard Equipment

• Category I three-point hitch linkage

• 2 / 4 / 6 cm adjustable cutting height

• Fixed front wheels

• Front chain safety guard

• Rear following roller

• Articulated cutting blades

• PTO drive shaft

Optional Extras

• Front swivel wheels

• Side obstacle‑avoidance disc

• Hydraulic side shift

Technical Parameters

Applications

Perfect for vineyards, apple, peach, citrus and other fruit orchards, organic farms and agro-cooperatives. Suitable for flat land, gentle slopes and terraced plantations. Mulched grass residue retains soil moisture, suppresses pests and lifts soil fertility for sustainable orchard farming.

Why GRANDEMAC

Manufactured by Jiangsu Grande Machinery, the G.FM orchard mower adopts heavy welded steel deck and anti-wear powder coating. Simple construction means easy on-site maintenance and spare parts replacement. Every unit is built for reliable, year-round orchard maintenance.

English Version — User Guide

GRANDEMAC G.FM Series Orchard & Vineyard Obstacle‑Avoidance Mower User Guide

This guide applies to all G.FM models: G.FM150 / G.FM150H / G.FM150H.S / G.FM180 / G.FM180H / G.FM180H.S

1. Safety Precaution (Must Read Before Operation)

• Only operated by trained adults. Keep children, bystanders and livestock away from the working zone.

• Wear safety goggles, ear protection, heavy gloves and non‑slip work boots.

• Always disengage the tractor PTO, shut down the engine, pull off the key and wait for all rotating parts to fully stop before inspection, cleaning, unclogging or maintenance.

• Never remove or modify safety guards, chain guards or warning labels.

• Do not work on steep slopes over 15°, in thunderstorm, or when the ground is extremely slippery.

• Confirm your tractor power: 25–50 HP for G.FM150 series; 30–50 HP for G.FM180 series, Cat. I three‑point hitch, 540 rpm PTO output.

• Keep hands and feet away from the side obstacle‑avoidance disc and articulated blades at all times.

2. Installation & Pre‑Operation Inspection

1. Hitch connectionPark tractor on level ground, engage parking brake. Connect the mower to Cat. I three‑point linkage, lock pins securely. Mount the PTO drive shaft, fix safety retaining chain, make sure the shield rotates freely without binding.

2. Cutting height settingAdjust to 2 cm / 4 cm / 6 cm according to grass condition: short cut for clean orchard floor; higher setting for mulching & soil moisture retention.

3. Optional assembly

• Side obstacle‑avoidance disc: install and test retracting & reset function by hand before starting.

• Hydraulic side shift: connect hydraulic hoses to tractor auxiliary outlets, test smooth lateral sliding.

• Swivel front wheels: replace fixed wheels if better maneuverability is required.

4. Pre‑check list before every start

• Check blade tightness, no crack or bending on articulated blades

• Grease all lubrication nipples

• Check hydraulic pipes for leakage

• Confirm rear roller and front wheels move freely

• Check all bolts, fasteners and safety guards

3. Operation Steps

1. Lower the mower deck to preset cutting height.

2. Start tractor engine, slowly engage PTO, let blades run idle for 1–2 minutes for warm‑up.

3. Move forward at steady low speed (3–6 km/h). Keep consistent speed for even cutting.

4. How the obstacle‑avoidance disc worksWhen the side disc touches tree trunk, stake or stone, it automatically retracts to avoid impact. Once past the obstacle, it resets to working position automatically. Do not crash hard into tree trunks deliberately.

5. If equipped with hydraulic side shift: adjust side shift to align the mower between tree rows for close trimming.

6. If grass is overgrown: mow twice, first high then low, to prevent clogging.

7. When turning: slow down, lift deck slightly, disengage PTO if sharp turn is needed.

8. After finishing work: disengage PTO first, idle tractor for a short while, shut down engine, wait until all rotating parts stop.

4. Maintenance Schedule

• After every useClean grass clippings and mud from deck, blades and side disc; check for wrapped vines or twigs.

• Every 25 working hoursGrease all pivot points, PTO joints, obstacle‑avoidance hinge; inspect blades, sharpen or replace damaged blades.

• Every 50 working hoursTighten all bolts; inspect hydraulic hoses for wear; check the reset spring of side disc.

• Every 100 working hours / End of seasonFull inspection, replace worn bearings, coat bare metal with anti‑rust oil, store in dry shelter.

5. Troubleshooting

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6. Storage

Clean completely, dry, apply anti‑rust treatment. Support the deck so blades do not touch the ground. Disconnect PTO shaft and store separately.