John Deere

OMM131756

Issue B9

Commercial Walk-Behind Mowers

GS30, GS45 and GS75

Serial No. (020001 - )

Introduction

Safety Signs

Controls

Operating

Replacement Parts

Service Machine Safely

Service Interval Chart

Service Engine

Service Engine

Service Transmission

Service Steering & Brakes

Service Mower

Service Electrical

Cleaning Or Replacing Battery

Checking Battery Electrolyte Level

Charging The Battery

Charging Rates

Using Booster Battery

Replacing Fuse

Adjusting PTO Clutch

Service Miscellaneous

Troubleshooting

Storing Machine

Assembly

Specifications

Warranty

Service Literature

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Service Electrical

Cleaning Or Replacing Battery

c CAUTION: Avoid injury! Battery gas can explode:

ˇ Keep sparks and flames away from batteries. Use a flashlight to check battery electrolyte level.

ˇ Never check battery charge by placing a metal object across the posts. Use a voltmeter or hydrometer.

ˇ Always remove grounded (-) battery clamp first and replace it last.



1. Remove wing nuts to remove battery cover.

2. Remove negative (-) (black) cable from battery first.

3. Remove positive (+) (red) cable.

4. If battery is very dirty, remove battery.

5. Clean battery, battery terminals, cable ends, battery box, and other parts with a solution of 1 part baking soda to 4 parts water. KEEP solution out of battery cells.

6. Rinse all parts with clean water. Let dry.

7. Apply petroleum jelly on battery terminals to help prevent corrosion.

8. Install battery.

9. Install positive (+) (red) cable to battery first.

10. Install negative (-) (black) cable.

11. Install battery cover over battery.

12. Install hardware just tight enough to hold battery secure.

Checking Battery Electrolyte Level

c CAUTION: Avoid injury! Sulfuric acid in battery electrolyte is poisonous. It is strong enough to burn skin, eat holes in clothing, and cause blindness if splashed into eyes.

ˇ Wear eye protection and avoid spilling or dripping electrolyte.

ˇ Flush eyes with water for 15-30 minutes if acid is splashed into eyes.

ˇ If acid is swallowed, get medical attention immediately.

Service Interval: Check battery electrolyte level every 50 hours of operation.



1. Remove battery hold down (A).

2. Remove manifold cap (B).

IMPORTANT: Avoid damage! DO NOT fill cells to the bottom of the filler neck (C). Electrolyte can overflow when battery is charged and cause damage.




3. Electrolyte (D) should be 6 mm (1/4 in.) above plates (E).

4. Add distilled water if necessary.

5. Install manifold cap.

Charging The Battery

c CAUTION: Avoid injury! BE VERY CAREFUL: Battery fluid (electrolyte), is a solution of water and sulfuric acid. It is very harmful to eyes, skin, or clothing.

ˇ Wear goggles or an eye shield when you work with a battery.

ˇ If the acid contacts your eyes, skin, or clothing, flush the area immediately with water. Get medical help, if necessary.

ˇ A battery gives off gas which can explode. An exploding battery will spray sulfuric acid in all directions.

ˇ Keep cigarettes, sparks, and flames away from the battery.

ˇ Charge the battery in an area with good ventilation.

Follow instructions on the battery charger or in the charger operator's manual, or use the instructions below as a guide.

Before you charge a battery:

ˇ Wait until the battery has warmed to room temperature. Do not charge a frozen battery.

ˇ Check the electrolyte level of each cell. (See Checking Battery Electrolyte Level in this section.)

ˇ Install the battery cap(s) on the battery.

Turn OFF and unplug the charger before you connect cables to the battery or disconnect cables from the battery.

If the battery becomes warm to touch during charging:

ˇ Reduce the charging rate OR

ˇ Stop charging the battery until it cools.

c CAUTION: Avoid injury! DO NOT charge a frozen battery. Battery gases can explode. Keep cigarettes, sparks, and flames away from battery.

Keep battery fully charged.



1. Remove and clean battery. (See Cleaning Or Replacing Battery in this section.)

2. Check electrolyte level. (See Checking Battery Electrolyte Level in this section.)

c CAUTION: Avoid injury! To avoid injury, before you connect or disconnect charger cables to battery, unplug charger cord.

3. Leave cell caps on battery while you charge it.

4. Connect positive (+) charger cable to positive (+) battery terminal.

5. Connect negative (-) charger cable to negative (-) battery terminal.

6. Plug in charger cord.

7. Charge battery. See Charging Rates on the next page.

8. Unplug charger cord. Remove charger cables.

9. Install battery.

Charging Rates

See your battery charger or charger operator's manual for information on charging. Or read the information below to FULLY CHARGE your battery.

For a charger with a CURRENT ADJUSTMENT CONTROL:

ˇ Adjust the control to 10 amps.

ˇ Charge the battery for 6- 8 hours.

For a charger with a switch for MAINTENANCE FREE, DEEP CYCLE, or NORMAL (CONVENTIONAL) setting:

ˇ Use the MAINTENANCE FREE or DEEP CYCLE setting.

For a charger with SLOW CHARGE, FAST CHARGE, or BOOST CHARGE setting:

ˇ DO NOT use the BOOST CHARGE setting.

ˇ Use the SLOW CHARGE setting:

ˇ For a charger rated at less than 10 amps.

ˇ For 3-16 hours.

ˇ Use the FAST CHARGE setting:

ˇ - For a charger rated at 10 amps.

ˇ - For 5-8 hours.

NOTE: Your charger may have an AUTOMATIC STOP to prevent over charging the battery:

ˇ When the battery is fully charged OR

ˇ When the battery is not in condition to take a charge.

Using Booster Battery



Connect positive (+) booster cable to booster battery positive (+) post (D).

Connect the other end of positive (+) booster cable to vehicle battery positive (+) post (A).

Connect negative (-) booster cable to booster battery negative (-) post (C).

Connect the other end of negative (-) booster cable (B) to engine ground away from battery.

Replacing Fuse



IMPORTANT: Avoid damage! For replacement - use only 25 amp fuse or you may damage the circuit.


The 25 amp fuse (A) is designed to protect the starting circuit on units equipped with electric start.

If you experience a total failure in the electric start circuit. Do the following:

ˇ Pull 25 amp fuse (A) from holder.

ˇ Install new 25 amp fuse.

ˇ If 25 amp fuse continues to fail, contact your John Deere Dealer for service.

Adjusting PTO Clutch

c CAUTION: Avoid injury! Stop engine before you adjust clutch. Adjust clutch if blade stop time is more than 6 seconds. See Checking Blade Stop Time in Operating section.

IMPORTANT: Avoid damage! Turn each of the adjusting nuts SAME NUMBER of turns. You may want to mark the brake plate and nuts before you adjust them to help keep track of turns.




Adjust PTO clutch (A) only if blade stop time is more than 6 seconds. See Checking Blade Stop Time in Operating section.

NOTE: It is not necessary to remove or disassemble the PTO clutch to make this adjustment.



Adjust PTO Clutch:

ˇ Tighten three nuts (B) 1/2 turn each.

ˇ Check blade stop time.

ˇ If blade stop time is more than 5 seconds, tighten the three nuts an additional 1/4 turn.

ˇ Continue to check the blade stop time and tighten the three nuts until the blade stop time is 3 - 5 seconds.

ˇ Start engine and listen for clutch scraping. If clutch is scraping, loosen the three nuts 1/4 turn.

ˇ See your John Deere Dealer if you can not meet both adjustment requirements.