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HP TWIN8 User Manual ◄ 13
BATTERY MAINTENANCE
• If the power unit is not in use for two or more months,
check the battery once a month and charge if the bat-
tery voltage is below 12.5V. Charge at 1.3A for 5-10
hours.
• If the battery voltage is below 12.0V, charge at
1.3A for 12-18 hours, let the battery sit for 1-2 hours
and check the voltage. If the voltage is not 12.5V or
greater, replace the battery.
• Always charge using a charger as rated as close to
1.3A as possible.
• Checking battery voltage and charging can be done
through the 12V marine plug on the battery cover when
using an appropriate adapter.
STORAGE
• Clean the unit thoroughly before storage. Do not
use water pressure.
• Always store the unit in a clean and dry facility.
• If the unit will be stored for a prolonged period
(over 30 days), add a fuel additive to the fuel tank
to prevent the fuel from gumming. Run engine for 2
minutes to circulate the additive throughout the fuel
system.
•
WARNING
When storing fuel or equipment with fuel in the tank,
store away from appliances that have pilot lights or
other ignition sources, they can ignite fuel vapors.
Replace crankcase oil with new oil.
• Remove spark plugs and pour approximately 1
ounce (30 ml) of engine oil into each cylinder.
Replace spark plugs and crank the engine slowly to
distribute the oil.
• Check hydraulic reservoir for water. If water is
found, change the oil and circulate it through the
tool hose and tool. (See “HYDRAULIC SYSTEM
MAINTENANCE” earlier in this section).
• Disconnect tool hoses.
ENGINE MAINTENANCE
Follow the maintenance schedule and general
maintenance instructions and emissions control
maintenance in the engine operators manual furnished
with the power unit.
Fuel system emissions maintenance:
• Check the fuel system emissions components
once a year to verify that the components are in
good condition and do not show signs of leakage. If
leakage is found, replace part.
• Check fuel lines, tank, cap and ttings frequently
for cracks or leaks. Replace if necessary.
• Clean the fuel cap area of dirt and debris.
• Replacement parts must be the same and installed
in the same position as the original parts.
HYDRAULIC SYSTEM MAINTENANCE
• Check hydraulic uid level daily. Add uid per
specications in this manual. (See “HYDRAULIC
FLUID” under the section titled “PRE-OPERATION”
page 11.
• Remove condensed moisture from the hydraulic
uid by pumping the hydraulic uid into a 5
gal/20 L. container through the pressure hose.
Make sure the engine is at idle when performing
this procedure. When the hydraulic reservoir is
empty turn the engine off immediately.
• Allow the uid to sit long enough for the water to
settle to the bottom of the container. Slowly pour
the uid back into the hydraulic tank, avoiding the
water at the bottom of the container.
• Each day, check hydraulic lines and ttings for
leaks, kinks, etc. Do not use your hand to perform
this check.
• Change the hydraulic lter element every 200
hours of operation. Change more often if cold,
moist or dusty conditions exist.
• Check oil cooler for debris. Remove debris with air
pressure.
MAINTENANCE