Multi Pro 1200/1250Hydraulic System Page 4 -- 12
Troubleshooting
The cause of an improperly functioning hydraulic sys-
tem is best diagnosed with the use of proper testing
equipment and a thorough understanding of the com-
plete hydraulic system.
A hydraulic system with an excessive increase in heat
ornoisehasapotentialforfailure.Shouldeitherofthese
conditions be noticed, immediately stop the machine,
turn off the engine, locate the cause of the trouble and
correct it before allowing the machine to be used again.
Continued use of an improperly functioning hydraulic
system could lead to extensive internal component
damage.
The chart that follows contains information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
Refer to the Testing section of this chapter for precau-
tions and specific test procedures.
Problem Possible Cause
Hydraulic oil leaks Fitting(s), hose(s) or tube(s) are loose or damaged.
O--ring(s) or seal(s) are missing or damaged.
Foaming hydraulic fluid Oil level in transaxle is incorrect.
Hydraulic system has wrong kind of oil.
Hydraulic oil is contaminated.
The steering pump suction line has an air leak.
Hydraulic system operates hot Oil level in transaxle is incorrect.
Hydraulic hose is kinked.
Hydraulic oil is contaminated or incorrect viscosity.
Suction screen in transaxle is loose or clogged.
Oil constantly forced over relief.
Steering pump is worn or damaged.
Transaxle or drive train problem (see Drive Train -- Chapter 7).
Steering inoperative or sluggish Engine speed is too low.
Oil level in transaxle is incorrect.
Steering pump drive belt is loose.
Steering cylinder is binding.
Steering relief valve is stuck open.
Steering control valve is worn or damaged.
Pulley key (either on engine or pump) is sheared.
Steering cylinder leaks internally.
Steering pump is worn or damaged.
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