Chassis Information
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WINDSOR
10•295
Make a visual check for fuel leaks at all engine-mounted fuel lines and
connections and at the fuel tank suction and return lines. Leaks in this area
may best be detected by checking for accumulation of fuel under the tank.
Engine performance and auxiliary equipment is dependent upon the ability of
flexible hoses to transfer lubricating oil, air, coolant and fuel oil. Diligent
maintenance of hoses is an important step in ensuring efficient, economical
and safe operation of engine and related equipment.
Check hoses daily as part of the prestart inspection. Examine hoses for
leaks. Check all fittings, clamps and ties carefully. Make sure that the hoses
are not touching shafts, coupling and heated surfaces, including exhaust man-
ifolds, sharp edges or other obviously hazardous areas. Since all machinery
vibrates and moves to a certain extent, clamps and ties can fatigue with age.
To ensure continued proper support, inspect fasteners frequently and tighten
or replace them as necessary.
Engine oil levels above the dipstick full mark or a decrease in lube oil
consumption may indicate internal fuel leaks into the crankcase. Check oil
level frequently for fuel contamination.
The motorhome uses a engine driven hydraulic pump to operate both the
power steering system and the engine hydraulic cooling fan system. The dual
stage hydraulic pump uses one half of the pump to supply pressurized
hydraulic fluid to the power steering gear assembly. The other half of the
pump supplies pressurized hydraulic fluid to the engine cooling fan motors.
The hydraulic system uses the same fluid for both systems sharing one com-
mon reservoir. The hydraulic fluid used is an automatic transmission fluid
(Dexron 3) which has a wide ambient temperature operating range.
CAUTION: If ambient temperatures approach 0°
Fahrenheit, Pennzoil Arctic Blue hydraulic fluid or equiva-
lent hydraulic fluid should be used. Using incorrect
hydraulic system fluid weights in cold or arctic tempera-
tures will raise the hydraulic system operating pressure and
may damage the hydraulic cooler.
The hydraulic pump creates pressure by meshing sets of gears together
inside a close tolerance housing. A filtered supply of hydraulic fluid from the
hydraulic reservoir enters the intake side of the pump. The meshing gear
assembly “squeezes” the oil through the pump to the output side delivering
the pressurized fluid to the power steering gear and the switching valve of
the engine cooling system. Each half of the pump is equipped with an inter-
nal bypass pressure relief spring. If the hydraulic pressure should exceed the
specified pressure limit, the internal bypass relief valve will be forced open
to keep the hydraulic fluid at operating pressure. The hydraulic pressure
generally is not rated in psi but is rated in the term bar. One bar is equivalent
Fuel Lines & Hoses
Hydraulic Pump
HYDRAULIC
SYSTEMS (ISC)
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