Checking for bent mower blades, Service mower – John Deere la105 User Manual

Page 35

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Service Mower - 34



3. Loosen nuts (A) and move cable bracket (B) away from the center of
mower deck to tighten belt tension. Move bracket until almost all slack is
out of cable but cable is not too tight. Tighten nuts.

Adjusting Spindle Brakes (107 cm (42 in.) Mower Deck)

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Remove mower deck.


3. Remove left and right belt shields, and adjust two blade brakes (A).


4. Measure distance from spindle brake bracket (B) to nut (C) on end of
brake rod.

• Bracket to nut distance should be: 2 - 3 mm (0.08 - 0.12 in).

5. If adjustment is required, turn nut (C) on end of brake rod in correct
direction to set brake at proper distance from pulley.

6. Adjust both brakes.

7. Install left and right belt shields.

8. Install mower deck.

Checking for Bent Mower Blades

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Raise mower deck to highest position to access blades.


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.


CAUTION: Avoid injury! The mower blades should stop in

approximately five seconds when the mower or PTO is

If you believe that your blades may not be stopping in that period
of time, take your machine to your authorized dealer where they
can safely check and service your machine.

IMPORTANT: Avoid damage! Avoid belt damage.

Spindle brake engagement should be checked and corrected
every time the mower belt tension is adjusted.

Mower belt tension should be adjusted, if required, before brakes
are adjusted.





CAUTION: Avoid injury! Blades are sharp. Always wear

gloves when handling blades or working near blades.

Replace blades if defective. Never straighten or weld them.




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