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Woods 1120 Post Hole Digger FAQs, Specs, Maintenance & Installation Tips

This page covers routine maintenance, lubrication, and safe operation for your Woods 1120 Post Hole Digger. Follow recommended service intervals to keep your auger in top condition and ensure safe, effective digging.

Best for: 3-point hitch tractors, fencing, landscaping
Common jobs: Digging fence posts, planting trees, setting poles
Focus: Routine maintenance, OEM parts, troubleshooting

1120 Post Hole Digger Fluid Specifications & Capacities

Fluid Specification Capacity (qt) Capacity (gal)
Gearbox Oil SAE 80W-90 gear oil See operator check procedure See operator check procedure

1120 Post Hole Digger Complete Maintenance Schedule

Service Item Action Interval Part Number Notes
Gearbox Oil Check oil level; add SAE 80W-90 gear oil as needed Every 8 hr Remove oil level plug; oil should be level with bottom of plug hole
Auger Point and Cutting Edges Inspect / Replace Every 8 hr Check for wear and replace as needed
Shear Bolt Inspect / Replace Every 8 hr Replace if broken
All Grease Fittings Lubricate with No. 2 lithium grease Every 8 hr Includes PTO shaft U-joints, shield bearings, auger pivots
PTO Shaft Shield Bearings Lubricate with No. 2 lithium grease Every 8 hr 2 fittings
Gearbox Oil Drain and refill with SAE 80W-90 gear oil Every 100 hr
PTO Shaft Universal Joints Lubricate with No. 2 lithium grease Every 8 hr 2 fittings
Auger Pivot Points Lubricate with No. 2 lithium grease Every 8 hr 2 fittings
All Fasteners Check / Tighten Every 8 hr

1120 Post Hole Digger Operating Specifications

Specification Value
PTO Speed Required 540 rpm
Tractor Power Range 20-50 HP

1120 Post Hole Digger Operating Warnings

System Indicator Required Action
Auger Auger in motion Keep bystanders away from auger during operation
Entanglement Moving parts exposed Keep hands, feet, and clothing away from moving parts

1120 Post Hole Digger Seasonal Storage

  • Clean all debris from unit
  • Lubricate all grease fittings
  • Touch up paint on bare metal to prevent rust
  • Store in dry location
01

How often should I check the gearbox oil on the Woods 1120 Post Hole Digger?

Answer: Check the gearbox oil every 8 hours of operation.

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02

What type of oil should be used in the gearbox?

Answer: Use SAE 80W-90 gear oil in the gearbox.

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03

How do I check the gearbox oil level?

Answer: Remove the oil level plug and ensure the oil is level with the bottom of the plug hole.

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04

How often should I grease the PTO shaft and auger pivot points?

Answer: Grease the PTO shaft and auger pivot points every 8 hours of operation.

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05

What type of grease should be used for lubrication points?

Answer: Use No. 2 lithium grease for all lubrication points.

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06

How do I install the Woods 1120 Post Hole Digger on my tractor?

Answer: Attach the digger to the tractor’s 3-point hitch and connect the PTO shaft according to the operator’s manual instructions.

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07

What safety precautions should I follow during operation?

Answer: Keep bystanders at least 25 feet away during operation and never operate the digger without all shields in place.

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08

How do I adjust the auger depth?

Answer: Adjust the auger depth by raising or lowering the tractor’s 3-point hitch.

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09

What should I do if the auger does not turn when the PTO is engaged?

Answer: Ensure the PTO shaft is properly connected and the shear bolt is intact. Replace the shear bolt if necessary.

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10

How do I store the Woods 1120 Post Hole Digger for the season?

Answer: Clean all debris from the unit, lubricate all grease fittings, touch up paint on bare metal, and store in a dry location.

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11

What should I do if the auger gets stuck in the ground?

Answer: Disengage the PTO, raise the auger slowly, and rock the auger back and forth to free it.

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12

How do I replace the auger on the Woods 1120 Post Hole Digger?

Answer: Remove the retaining bolt and slide the auger off the output shaft. Install the new auger and secure with the retaining bolt.

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13

How do I know if the PTO shaft is at the correct length?

Answer: With the digger fully raised and lowered, ensure the PTO shaft does not bottom out or separate.

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14

What should I do if the gearbox is leaking oil?

Answer: Inspect the gearbox for damaged seals or gaskets and replace as necessary.

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15

How do I identify if the shear bolt has failed?

Answer: If the auger stops turning but the PTO shaft continues to rotate, the shear bolt may have failed and should be replaced.

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16

What is the recommended maintenance interval for checking all fasteners?

Answer: Check all fasteners every 8 hours of operation.

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17

How do I transport the Woods 1120 Post Hole Digger safely?

Answer: Raise the digger to transport position, secure the auger, and drive at a safe speed.

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