National Flooring Equipment 5625, Инструкция по эксплуатации

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Troubleshooting Guide
Problem Cause Solution
1. Scraper does not work when pump is
generating pressure.
a. Severe blockage in wheel drive motor
hoses
b. Wheel drive motors defective
a. Check hoses for blockage and replace
hose if necessary
b. Call National service center
2. Hoses are worn. a. Hoses rubbing on components
b. Hose has been exposed to poor environ-
mental conditions
a. Replace and protect hose
b. Replace hose and protect equipment from
poor conditions
3. Machine makes an unusually loud hissing
or whistling noise.
a. Fluid is passing over relief valves
b. Air in hydraulic circuit a. If noise is continuous, call National service
center
b. See Troubleshooting 7 & 9
4. Oil deposits are evident on the inner sides
of the driving wheels.
a. The shaft seals on the wheel motors worn
out
b. Hose fi ttings are loose
a. Have shafts seals replaced by a specialist
b. Tighten hose
fi tting. Replace hose or fi tting
if necessary
5. The machine has no power with the engine
running at 3500 rpm.
a. Check the valve adjustment
b. Check hoses for leaks a & b. Contact National service center imme-
diately. Do not operate in this condition.
6. The scraper does not react when the mo-
tion control joystick is actuated.
See possible cause 5a and 5b See remedy solution 5a and 5b
7. The hydraulic oil is very cloudy. Excessive
air in the circuit can cause severe dam-
age to pump. Stop machine and repair
immediately!
a. Water has entered the hydraulic tank
b. Oil is contaminated with dirt
c. Air has entered the circuit
a. Repair tank if necessary. Drain and clean
tank thoroughly.
b. Drain and clean tank thoroughly. Change
oil.
c. Contact national service center.
8. Excessive amount of oil on the chassis. a. Outside oil spilled on chassis
b. Loose hose connections
c. Loose tank
fi ttings
d. Low fl uid level
a. Clean machine thoroughly and see if oil
returns
b. Check for loose hoses
c. Check for loose
fi ttings
d. Check fl uid level and replace
9. Hydraulic oil and/or oil foam leaking from
the oil tank.
Excessive air in the circuit can
cause severe damage to piston pumps.
Stop machine and repair immediately!
a. Oil level is too high
b. Oil level is too low
c. Vent in return
fi lter blocked
d. Air getting into hydraulic circuit
a. Drain tank to correct level
b. Fill tank to correct level
c. Check for blockage
d. Check all suction lines. Tighten all hose
connections and fi ttings.
10. Engine dies or cuts out. a. Fuel tank is empty
b. Oil is low
c. Operator is not seated properly a. Change or fi ll fuel tank
b. Fill oil to proper level
c. Position on seat correctly
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