
191
Failure
Possible cause
Troubleshooting practice
Fast battery self-discharge
Failure of all
or several storage batteries
Battery leads are dirty with
mud or battery fluid covering
the battery surface
Give the battery for repair
Clean the battery with dry cloth,
then with a cloth moisten in 10%
ammonia spirit solution or soda ash
solution
Battery fluid has contami-
nants
Discharge the battery with cur-
rent, equal to 1
⁄
10 of storage capac-
ity, until 1.1-1.2 V for one battery.
Drain battery fluid, fill new battery
fluid and charge the battery
Battery fluid is decreased
too fast
Battery fluid is “boiling out”
Battery monoblock is dam-
aged
Check the voltage regulator
Give the battery for repair
Battery fluid is leaking
from one or two batteries
through the vent hole during
battery charge
Too high battery fluid level
Too high charge rate
Short circuit of the plates in
one of the batteries
Remove excess battery fluid
with rubber bulb
Check the voltage regulator
Give the battery for repair
When charging completely
discharged battery, battery fluid
voltage and temperature are
raising very fast and boiling
starts, and density is slightly
increasing
Sulfatation of the plates that
can be caused by
long storage battery shutdown,
or it is operated when battery
fluid level is too low, or if the
battery is systematically under-
charged
Sulfatated plates are corrected by
the charge-discharge cycle with
current not exceeding 1
⁄
20 of bat-
tery capacity, when the initial bat-
tery fluid density is 1.12 g/cm
3
maximum. Very sulfatated plates
are not repaired
Power Takeoff
Power Takeoff is
not
switching on
Pneumatic
chamber
dia-
phragm of the Power Takeoff is
damaged
Power Takeoof pinion teeth
are worn or damaged
High air leakage due to poor
fastening of the air pipe con-
necting fittings, or their failure
Replace the diaphragm
Disassemble the Power Takeoff,
align gear teeth and replace worn
parts
Detect leakage places by putting
soap solution on the hose and the
plumbing fittings. Tighten the
plumbing fittings in the leakage
places. Replace defective parts
Summary of Contents for 4320M
Page 1: ...URAL 4320М TRUCK and its Modifications ...
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Page 159: ...156 Figure 123 Engine Electronic Control Unit Wiring Scheme ...
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Page 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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