HSM
GRANDEMAC
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Product Overview
The GRANDEMAC HSM obstacle-avoidance flail mower is purpose-built for orchard and vineyard maintenance. Featuring a hydraulic side disc, it automatically navigates around tree trunks to trim weeds close to trees without damaging bark. This PTO-driven flail mulcher fits tractors from 40 HP up to 75 HP and runs at standard 540 rpm PTO speed, delivering clean, even mowing and fine grass mulching for fruit farms, vineyards and nut orchards.
Hydraulic Side Avoidance Disc: Side disc stretches 0–510 mm horizontally to bypass tree trunks, solving the hard-to-reach weed problem along tree rows.
Heavy-Duty Flail Cutting System: Equipped with hardened flail blades and hammer knives to shred grass, weeds and soft brush into mulch, returning organic matter to soil.
Compact & Robust Frame: Welded heavy steel housing, stable belt drive system, smooth power transmission for long hours of continuous farm work.
Multiple Working Width Options: Four models available to match different row spacing in orchards and vineyards.
Standard PTO Connection: 540 rpm PTO, compatible with most common 40–75 HP farm tractors with three-point hitch.
Perfect for apple, peach, citrus, nut orchards, grape vineyards, berry farms and tree nurseries. Ideal for under-tree weed control and row cleaning.
| Parameter | HSM135 | HSM145 | HSM155 | HSM175 |
|---|---|---|---|---|
| Working Width (mm) | 1350 | 1450 | 1550 | 1750 |
| Disc Diameter (mm) | 510 | 510 | 510 | 510 |
| Flail Blades | 24 | 24 | 24 | 28 |
| Hammer Knife Blades | 48 | 48 | 48 | 56 |
| Belts | 3 | 3 | 3 | 3 |
| PTO Speed (rpm) | 540 | 540 | 540 | 540 |
| Matched Tractor Power (HP) | 40/70 | 45/70 | 50/70 | 55/75 |
| Overall Length (mm) | 2200 | 2200 | 2200 | 2200 |
| Overall Width (mm) | 1500 | 1600 | 1700 | 1900 |
| Side Adjustment Range (mm) | 0–510 | 0–510 | 0–510 | 0–510 |
| Height (mm) | 1140 | 1140 | 1140 | 1140 |
| Weight (kg) | 315+170 | 322+170 | 334+170 | 350+170 |
Manufactured by Jiangsu Grande Machinery, the HSM series orchard mower is engineered for low maintenance and reliable performance in tough orchard environments. We support OEM & bulk orders, offer full inspection before shipment and supply spare parts globally for our agricultural implements.
Pre-operation Check
Confirm your tractor power and PTO speed match the mower model (540 rpm). Inspect blades, belts, hydraulic hoses and fasteners for damage or looseness.
Check hydraulic oil level; ensure no oil leakage.
Connect the machine to the tractor three-point hitch, link the PTO shaft and hydraulic lines correctly.
Start & Test Run
Keep people away from the cutting zone before startup.
Lift the mower off the ground, engage PTO slowly and run it idle for several minutes, test the hydraulic side disc extension and retraction.
Field Operation
Lower the mower to your target cutting height, drive at a steady low speed.
The hydraulic side disc will bypass tree trunks to trim weeds beside trunks. Do not operate at excessive speed.
Avoid hitting stones, stumps and hard obstacles. If the mower gets jammed, stop the tractor and cut power before clearing blockages.
Post-use Maintenance
Shut down PTO, release hydraulic pressure and wait until all blades stop completely before inspection.
Clean grass residue and dirt from blades, housing and side disc.
Lubricate moving parts regularly, check belt tension and replace worn blades timely.
Store in a dry shelter, protect hydraulic connectors from dust and moisture.
Q1: Which tractors fit this mower?
A: It fits 40–75 HP tractors with standard 540 rpm PTO and three-point hitch. Different HSM models correspond to different power ranges.
Q2: How far can the side disc extend?
A: The hydraulic side disc has an adjustment range of 0–510 mm, to get close around tree trunks without barking trees.
Q3: What vegetation can it cut?
A: It cuts weeds, grass and soft brush, and shreds them into mulch to return nutrients to orchard soil. Not suitable for thick hard woody branches.
Q4: Can I replace the blades myself?
A: Yes. Make sure the machine is fully powered off and blades static. Use original matching hammer knives or flail blades for replacement.
Q5: What maintenance is required routinely?
A: Daily cleaning after work; regular lubrication, belt tension check, hydraulic oil inspection, and timely replacement of worn or bent blades.
Q6: Is spare parts supply available?
A: Yes, we provide global supply of original spare parts including blades, belts and hydraulic components.
