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Service - Cutting Units


Backlapping

IMPORTANT: Avoid damage! Backlap cutting reel routinely to prolong life of reel.

Do not overtighten bed knife or excessive wear at the ends will occur.


To maintain sharp edges required on cutting reel, follow this procedure:

1. Before backlapping, adjust bed knife to cutting reel. The bed knife must be adjusted to assure a light, even contact over the entire length of the blade.


M60606

2. Remove cover (A).

3. Screw 3/8-in. backlapping bolt into reel shaft.

4. Put socket head extension (B) on bolt.

5. Connect the extension to the backlapping unit (C).

c CAUTION: Avoid injury! Avoid injury from rotating blades

:

• Disengage the GTC (Greens Tender Conditioner) before backlapping.

• Keep hands and feet away while backlapping.

6. Turn on the backlapping motor. Make sure the reel is running in reverse.

7. Using a long handled brush, apply a reel sharpening compound from one end of the reel to the other as uniformly as possible. Repeat application in opposite direction. Continue to turn reel backwards until reel is quiet (approximately 3 minutes).

8. Periodically visually check blade appearance. Continue to backlap until blades are evenly sharpened.

9. Turn off motor, and disconnect backlapping unit.

NOTE: Do not operate the reel in forward direction until all the lapping compound is removed from the reel and bed knife. Dulling can occur.

10. Thoroughly wash off all reel sharpening compound with water.

11. Remove backlapping bolt and install cover.

12. Adjust bed knife to reel.

Removing And Installing
Bed Knife And Shoe


M60578

1. Remove all bed knife screws and bed knife (A).

2. Install bed knife and new screws. Alternate tightening by starting with center screw.

3. Adjust bed knife to reel.

4. Backlap cutting reel.

Grinding the Bed Knife

NOTE: Bed knife and support assembly must be ground as a complete unit.


M47199

1. When grinding the bed knife, it is important to have a 6.5? relief angle on the top surface (A) and a 15? relief angle on the front surface (B).

2. Put entire bed knife support and bed knife in a suitable grinder and grind until material is consistently removed from the entire length of the top and front surfaces of the bed knife.

Adjusting Reel Or Roller Drive Chains

IMPORTANT: Avoid damage! Block machine securely before adjusting chain.


1. Remove transport wheels, if equipped.


MX11269

2. Remove five nuts (E), washers on left drive cover.

3. Remove cover.


MX12986

4. Loosen nut (F) (reel drive chain) or nut (G) (roller drive chain).


MX12989

5. Reel Drive Chain: Slide idler (H) back or forth until chain deflects 6mm (1/4-in.) at mid span.

6. Tighten nut (F).


MX12989

7. Roller Drive Chain: Slide idler (K) back and forth until chain deflects 11mm (7/16-in.) at mid span.

8. Lubricate drive chains using John Deere Multi-Purpose SD Polyurea Grease or equivalent.

9. Tighten nut (G).

10. Reverse disassembly steps.

Adjusting Brake

NOTE: Make sure reel clutch is disengaged.

1. Check operation of park brake (see Testing Park Brake, in Operating section).

2. If adjustment is needed do the following:


MX21100

a. Remove cover by loosening bolt (C).


MX11272

b. Loosen jam nuts (D) holding brake cable near the brake.

c. Shorten ferrule length (E).

d. Tighten jam nuts (D).

e. Repeat Step 1.

f. If still not properly adjusted, replace the brake band.

g. Install cover and tighten bolt.

Adjusting Reel Shield


MX11249

1. Loosen nuts (A) on both sides.

2. Rotate shield (B) 1.6mm to 3.2mm (1/16 to 1/8 in.) reel to reel shield clearance.

3. Tighten nuts on both sides.

Checking Tire Pressure (Transport Wheels)

Check tire pressure of the transport wheels, if your machine is equipped with them.

Air pressure should be 125–140 kPa (18–20 psi).