37SG OWNER’S MANUAL 9/05/19 Page 12 of 19
BATTERY MAINTENANCE (continued)
BATTERY VOLTAGE LEVEL: Check the voltage level using an appropriate meter. Always keep the
battery fully charged and clean to help prolong battery life expectancy, especially when the temperature is
below 32°F (0°C). For off-season long-term storage, we recommend removing the battery from the stump
grinder and storing where the ambient temperature remains above freezing.
TO CHARGE THE BATTERY follow this procedure:
1.
Disconnect the battery cables, removing the negative cable first.
2.
Remove the battery from the machine.
3.
Clean the battery exterior with paper towels.
4.
If the battery posts and cable terminals are corroded, clean them with a wire brush cleaner tool. A
solution of four parts water and one part baking soda is helpful.
5.
Apply a light coating of grease to the battery terminals to prevent corrosion.
6.
Check the battery electrolyte level (see procedure above).
7.
Insure that the battery caps tightly in place.
Do not charge the battery near flames or sparks, or while smoking.
WARNING
: Battery fumes are flammable and explosive. Avoid explosion hazard that could blind
and burn. Tools and jumper cable clamps can make sparks, so use them with care. Shield eyes and
face, and wear rubber gloves.
8.
Connect a 12-volt DC battery charger and charge at 3 to 4 amperes for 4 to 8 hours. Do not
overcharge.
9.
When the battery is fully charged, turn off and unplug the charger from the electrical outlet, then
disconnect the charger leads from the battery posts.
10.
Reinstall the battery securely into the stump grinder.
11.
Reconnect the cables. Attach the positive cable first, then the negative one.
CUTTER WHEEL TORQUE SPECS
We recommend that the teeth and holders be inspected after every use to maximize the usable life
of these high wear items.
•
Cutter teeth have three sides and we recommend rotating them frequently to keep the cutting
edges sharp. A torque wrench should be used to torque these down to 25 ft. lbs. A worn and
unsharpened tooth will cause the holders to wear prematurely, resulting in poorer performance and
increased maintenance costs.
•
The holders should be inspected and torqued to 180 ft. lbs. using a torque wrench as well.
•
The nuts that fasten the axle and drive stubs on the cutter wheel together should be torqued to 55
ft. lbs. using a torque wrench.
