Bobcat 743 - Troubleshooting the Engine

o
o
o
TROUBLESHOOTING
The troubleshooting section is used in finding and correcting loader problems which
can most often occur. Service personnel from an authorized Bobcat dealer must do
most of the service procedures. They must not be done by the owner/operator. The
service procedures marked D/S are to be done only by your authorized Bobcat
dealer.
The pages which are referenced are used to find the correct service procedures in
this manual.
TROUBLESHOOTING
THE ENGINE
PROBLEM CAUSE
Engine will not turn over with Battery has low charge. Charge
CORRECTION
battery and find
starter. of loss or damage.
Cables are loose or dirty. Clean and
tighten
the
cables.
cause
battery
Defective starter, solenoid or
Check
the starting circuit.
wiring. Make repairs as needed.
Engine
turns with starter, but is
Wrong starting procedure. Use correct starting procedure.
difficult to start.
Fuel
shut off button pulled out.
Push button in.
Auxiliary control lever or Take out of "detent" .
Insta"
hydraulic pedals are in "detent". lockbolts
when
not using
auxiliary control.
No fuel in tank.
Add fuel.
Vent in fuel
filler
cap is Clean the vent.
plugged.
Dirt or water in fuel system. Make repairs as needed.
Fuel
filter is dirty.
Insta" a new filter.
Hole in fuel line. Make repairs as needed.
Weak battery.
Charge or replace battery.
Wrong oil in the engine. See Oil Specifications.
Engine has lost compression.
Recondition
the engine.
Engine has overheated.
Check cooling system.
Poor fuel quality. Use fresh, good quality fuel.
Engine has little power or runs Damaged injectors.
Make repairs as needed.
rough.
Dirt or water in fuel system.
Clean and make repairs
as
needed.
PAGE
-
28
D/S
9
7
21
-
D/S
21
-
-
23
D/S
-
21
DIS
D/S
-39-
743 Loader
Operator's
Manual