Service Hydraulics/Transmission

c CAUTION: Avoid injury! To avoid injury from the release of pressurized fluids, shut off engine and only remove filler cap when it is cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve the pressure before removing completely.


IMPORTANT: Avoid damage! Engine must NOT be running.

4. Check oil level when oil is cold.

5. If oil level is low, add John Deere HY-GARD Transmission/Hydraulic Oil or an equivalent oil meeting John Deere J20C specifications.

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6. Fill to 0-25 mm (0-1 in.) above bottom of filler neck screen (A).

Changing Hydraulic Oil


IMPORTANT: Avoid damage! Prevent dirt from getting in reservoir.

NOTE: Change oil at 1000 hours or yearly, whichever comes first.

1. Park on level surface.

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2. Remove bottom hose (A) off the hydraulic oil filter and drain oil. Use drain pan to catch oil.

3. Install hose.

4. Fill reservoir with approximately 16.6 L (4.4 gal) of oil. Use John Deere HY-GARD oil or an equivalent oil meeting John Deere specifications.

5. Start engine. Cycle hydraulic control for 1-2 minutes.

6. Stop engine and check oil level. Level should be 0-25 mm (0-1 in.) above bottom of screen.

Replacing Hydraulic Oil Filter

NOTE: Replace filter after first 50 hours of operation and every 1000 hours or yearly.

1. Stop engine. Lock the parking brake.

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2. Turn hydraulic oil filter (A) counterclockwise to remove. Use drain pan to catch dripping oil.

3. Put a film of clean oil on seal of new filter.

4. Turn filter until seal contacts mounting surface. Tighten filter one full turn after gasket contact. A filter wrench may be required.

5. Start engine and check for leaks.

6. Stop engine and check oil level.

Adjusting Transmission Neutral

The machine may creep forward or backward while in neutral with engine running.

After engine has started, release parking brake and with directional speed control pedals centered. The machine should not move.

If movement is evident, neutral return mechanism is adjusted incorrectly.

c CAUTION: Avoid injury! To avoid injury:

· Use a safe lifting device to raise greensmower.

· Stay clear of rotating wheels.

1. Using a safe lifting device, raise greensmower so one drive wheel is off the floor.

2. Start engine and operate at slow idle.

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3. Loosen top nut (A) slightly and turn the eccentric cam (B) to stop wheel rotation.

· Clockwise stops forward creep.

· Counterclockwise stops reverse creep.

4. Tighten top nut.

5. Re-check neutral setting by moving and releasing the forward and reverse pedals.

NOTE: After adjusting Transmission Neutral, Safety Interlock may need adjustment. (See Adjusting Ignition Interlock Switches in this section).

Adjusting Mowing Speed

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Adjusting screw (A) determines mowing speed.

See Cutting Ratios below for correct adjustment.

Cutting Ratios


Seconds To Travel: · 30.48 m (100 ft)	27.2	22.7	19.5
Ground Speed: · km/h (mph)	4 (2.5)	4.8 (3.0)	5.6 (3.5)
Frequency: · mm/cut (in./cut)	3.5 (0.136)	4.1 (0.163)	4.8 (0.190)


Seconds To Travel: · 30.48 m (100 ft)	17.0	15.2
Ground Speed: · km/h (mph)	6.4 (*4.0 )	7.2 (4.5)
Frequency: · mm/cut (in./cut)	5.5 (0.217)	6.2 (0.244)
*4 mph = Expected factory setting.

Adjusting Ignition Interlock Switches

1. Lift seat.

2. Move mow/transport lever to mow position.

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3. Align switch (A) so that it is compressed against lever (B).

4. Put forward/reverse pedals in the NEUTRAL position.

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5. Align switch (C) so it is compressed against top of shift lever (D).

6. Release parking brake.

NOTE: Set screw (E), hub (F), and switch (G) are located under right side of platform.

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7. Loosen set screw (E).

8. Align switch hub (F) so it compresses switch (G).

9. Tighten set screw.

10. Check adjustment by performing Tests in Operating The Machine section.

Introduction

Safety Signs

Controls

Operating Machine

Operating Mower

Replacement Parts

Service Machine Safely

Service Intervals

Service Lubrication

Service Engine