Snorkel UL40 - Battery Cell Equalization; Setting System Relief Valve

Page 3 - 6 UL25/UL32/UL40
SERVICE AND REPAIR
When night air temperatures fall below 18°C (65°F), a battery charged in an unheated area should
be placed on charge as soon as possible after use. Under such conditions, a 4 hour charge once a
week in the early afternoon will improve the battery life. Use the following procedure to charge the
battery.
1. Check battery uid level. If the electrolyte level is lower than 10mm (3/8 inches) above the plates,
add distilled water only.
2. Verify charger voltage switch is set to 12 volts.
3. The battery charger is located at the rear of the mast. Connect an extension cord (a minimum
of 1.5mm
2
[12 gauge] conductor and a maximum length of 15m [50 feet]) to the charger plug.
Connect the other end of the extension plug to a properly grounded outlet of proper voltage and
frequency.
4. Set charger control to “conventional” setting. Charger ammeter should indicate charger rate.
5. When battery is fully charged, charger automatically turns itself off. Disconnect the extension
cord.
BATTERY CELL EQUALIZATION
The specic gravity of the electrolyte in the battery cells should be equalized monthly. To do this;
• Charge batteries as outlined in battery charging.
• After the initial charge, check the electrolyte level in all cells and add distilled water as neces-
sary.
• Turn the charger on for an additional 8 hours. During this charge, the charging current will be
low (four amps) as cells are equalizing.
• After equalization, the specic gravity of all cells should be checked with a hydrometer. The
temperature corrected specic gravity in this state should be 1.260. If any corrected readings
are below 1.230, the battery should be replaced.
Do not check the specic gravity in a cell to which water has just been added. If there is not enough
electrolyte in a fully charged cell to obtain a sample for the hydrometer, add water and continue
charging for 1 to 2 hours to adequately mix the water with the electrolyte.
SETTING SYSTEM RELIEF VALVE
Check the hydraulic system pressure whenever the pump or relief valve has been serviced or re-
placed.
Battery
Charger
Figure 3-3: Battery Charger.