Routine Maintenance; Engine; Hydraulic System; Storage - Stanley HP1 Safety, Operation And Maintenance Manual

ENGINE MAINTENANCE
Follow the maintenance schedule and general
maintenance instructions in the engine mainte-
nance and operation manual furnished with the
power unit. Normal maintenance includes:
• Service foam air pre-cleaner every 25 hours of
operation.
• Service air paper cartridge every 100 hours of
operation.
• Replace in-line fuel filter every 100-300 hours or
sooner if required.
• Replace spark plugs every 100 hours of opera-
tion.
• Change engine oil after first 5 hours of opera-
tion, then after every 50 hours of operation. If
engine has been operating under heavy load or
in high ambient temperature, change the oil
every 25 hours of operation.
• Change oil filter when engine oil is changed.
• Check oil level daily.
• Remove dirt and debris from engine with a cloth
or brush daily. Do not use water spray.
• Clean air cooling system every 100 hours of
operation.
HYDRAULIC SYSTEM MAINTENANCE
• Check hydraulic fluid level daily. The center of
the sight pipe on the reservoir must be dark. If
it is not dark, fluid must be added. Add fluid per
specifications in this manual. (See "HYDRAU-
LIC FLUID" under the section titled "OPERAT-
ING INSTRUCTIONS".
• Remove condensed moisture from the hydraulic
fluid by pumping the hydraulic fluid into a 5 gal/20
ltr 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 fluid to sit long enough for the water to
settle to the bottom of the container. Slowly
pour the fluid back into the hydraulic tank,

ROUTINE MAINTENANCE

avoiding the water at the bottom of the con-
tainer.
• Each day, check hydraulic lines and fittings for
leaks, kinks, etc. Do not use your hand to
perform this check.
• Change the hydraulic filter 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.

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 a short period to circulate the addi-
tive.
• 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 SYS-
TEM MAINTENANCE" earlier in this section).
• Disconnect tool hoses.
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