MONTHLY/160 HOURS:
RADIATOR EXTERIOR Clean any foreign matter from
the radiator cooling fins and through-core cooling pas-
sages by directing compressed air and flushing water
over the entire area of the core in the reverse direction
of normal air flow.
QUARTERLY:
CORROSION INHIBITOR Replenish the cooling sys-
tem corrosion inhibitor every 500 hours of operation.,
Never use a chromate based inhibitor corrosion inhibitor
when the cooling system contains ethylene glycol. Use
only non-chromate based inhibitors. Chromate base in-
hibitors reacting with ethylene glycol can produce hy-
droxide, commonly known as “green slime”. This
substance reduces the heat transfer rate and can cause
serious engine overheating.
SEMI ANNUALLY:
COOLING SYSTEM Clean the cooling system 1,000
hours or annually whichever comes first. Use a radiator
cleaning compound, following the instructions on the
container. Flush the system with fresh water and refill
with an ethylene glycol solution of 50% by volume.
Reset the filter indicator each time the hood is opened
as it provides a built-in check to assure proper func-
tioning. If it does not reset then the orifice is plugged
and must be cleaned.
A clogged filter restricts engine power output.
ENGINE BELTS Check all engine belts for condition
and proper adjustment. Consult the engine manufac-
turer’s manual for the recommended belt tension and
tensioning methods.
QUARTERLY: Drain accumulated water and sediment
from the fuel tank by removing the drain plug and al-
lowing the tank to drain until all water is removed and
the fuel flowing from the tank is free of sediment.
MAINTENANCE AND LUBRICATION
If a large amount of sediment has accumulated, drain
the tank completely and flush liberally with kerosene un-
til all sediment has been removed. Allow the tank to
drain completely before refilling with fuel.
SEMI ANNUALLY:
CRANKCASE BREATHER Service the crankcase
breather following the procedures given in the manufac-
turer’s manual.
FUEL FILTER ELEMENTS On all machines with Cat
engines, remove the fuel filter casings and replace the
fuel filter elements every six months (1000 hours) or
when there is evidence of plugging.
ENGINE RADIATOR
MAINTENANCE
DAILY/8 HOURS:
COOLANT LEVEL Check the engine radiator coolant
level and add coolant if necessary. The coolant
should be visible in the sight gage near the top of the
radiator tank. A solution of 50% ethylene glycol by vol-
ume is the recommended year-round coolant. Re-
plenish the corrosion inhibitor if necessary. Refer to
the “Operation Guide” supplied with the engine, or the
nearest Engine manufacturer’s service center for
guidance in selecting the proper conditioner for the
cooling system.
In climates where freezing does not occur, use a so-
lution of clean water with a corrosion inhibitor for opti-
mum cooling.
4 - 8 Revised: March 2005RT700 Series
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