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Service Mower - 25
SERVICE MOWER
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Picture Note: Mower deck with side discharge used for illustration.
3. Measure distance (A) between blade tip and flat ground surface.
4. Rotate blade 180° and measure distance between other blade tip and
flat ground surface.
5. Install new blade if the difference between the two measurements is
more than 3 mm (1/8 in.).
6. Repeat for all blades.
Checking and Replacing Mower Blades
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NOTE: Only replace blades. Never straighten or weld them.
Checking Mower Blades
1. Park machine safely. (See Parking Safely in the Safety Section).
2. Raise the mower deck to the transport position (also the 12.7 cm [5 in.]
cutting height position).
3. Raise front of machine with a safe lifting device.
• Support with jack stands and/or wooden blocks.
4. Check mower blades:
• Mower blades should be sharp and free of any damage.
• Inspect blades; sharpen/balance or replace as necessary.
Replacing Mower Blades
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1. Remove blade bolt (A), three 1/4 in. washers (B) and blade (C).
2. Install replacement blade:
• Blade wing must face toward top of mower deck.
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• Install blade bolt (A), blade (B) and three 1/4 in. washers (C).
• Tighten blade bolt to 163 N•m (120 lb-ft).
3. Lower machine.
4. Adjust mower deck to a desirable cutting height.
Sharpening Blades
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• Sharpen blades with grinder, hand file, or electric blade sharpener.
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MIF
• Keep original bevel (A) when grinding.
• Blade should have 0.40 mm (1/64 in.) cutting edge (B) or less.
CAUTION: Avoid injury! Do not work near raised mower deck
unless it is safely supported.
Mower blades are sharp. Wrap blades or wear gloves when
servicing.
Before performing any service function, wait for all moving
parts to stop turning.
Disconnect battery or remove spark plug wire before making
repairs.
IMPORTANT: Avoid Damage! When replacing mower blades,
always use genuine Great Dane Service Parts.
IMPORTANT: Avoid Damage! When installing the blade:
• Make sure the blade is properly seated on the spindle.
• Make sure the concave side of the large washer faces towards
the blade.
CAUTION: Avoid injury! Mower blades are dangerous!
Always wear gloves while working on blades.
Always wear safety eye protection when grinding.
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