Bobcat 743 - Troubleshooting the Hydraulic System

PROBLEM
CAUSE CORRECTION PAGE
Engine has little power or runs Engine is hot.
See "Engine Overheats"
-
rough (Cont'd).
Restricted exhaust. Clean exhaust system.
-
Dirty air cleaner. Install new element.
20·
Engine has low compression. Recondition the engine. D/S
Engine overheats. Restriction in cooling air flow. Check for
debris on
radiator D/S
grill or on engine cooling fins.
Blower
shrouding
damaged or Check shrouding and repair or
23
missing. replace.
Engine is overloaded. Run at full throttle.
-
TROUBLESHOOTING THE HYDRAULIC SYSTEM
No drive on both sides.
Hydraulic oil is low.
40 Micron filter is plugged
(Note: "Trans" light will be on).
Damaged vane pump.
Hydrostatic system is
damaged.
No drive on one side.
Control linkage is disconnected.
Hydrostatic system is
damaged.
Machine pulls to one side.
Wrong tire pressure.
Steering linkage interference.
Damaged hydrostatic system.
Machine
moves when levers Steering linkage
out
of
are in neutral.
adjustment.
System is overheating.
Hydraulic oil level is low.
Cooling system is
dirty. Air
restricted.
Low
charge pressure
(transmission light on).
Auxiliary control in detent.
Bobcat is overloaded.
Hydrostatic transmission
defect.
40 Micron filter dirty.
Parking brake will not hold.
Out of adjustment.
-40-
Check oil level,
add as 30
necessary.
Install new filter. D/S
Check condition of pump
and
D/S
replace if bad.
Check hydrostatic system. D/S
Repair linkage.
D/S
Check hydrostatic
system and
D/S
make repair as needed.
Check
all tires for correct
60
pressure.
Check steering linkage
and
D/S
a djust as necessary.
Check system and make repair. D/S
Adjust steering linkage. D/S
Check oil level
and add
as
30
necessary.
Clean cooling system.
Check
D/S
for debris on radiator grill.
Check by-pass valve.
D/S
Take out of detent.
7
Use correct size attachment.
-
Check system and make repair. D/S
Replace filter element. D/S
Make adjustments as needed.
35
743 Loader
Operator's Manual