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Multi Pro 5800Hydraulic System Page 5 − 22

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

or noise has a potential for failure. Should either of these

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.

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Problem

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Possible Cause

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Hydraulic oil leaks.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Hydraulic fitting(s) or hose(s) are loose or damaged.

O−ring(s) or seal(s) are missing or damaged.

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Foaming hydraulic fluid.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Oil level in reservoir is incorrect.

Hydraulic system has wrong kind of oil.

Piston and/or gear pump suction line has an air leak.

Water has contaminated the hydraulic system.

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Hydraulic system operates hot.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Oil level in reservoir is incorrect.

Hydraulic hose is kinked.

Oil is contaminated or incorrect viscosity.

Brakes are engaged or sticking.

Piston pump by−pass valve is open or damaged.

Hydraulic oil cooling system is not operating properly.

Charge pressure is low.

Traction circuit pressure is incorrect.

Wheel motor(s) or spray pump motor is/are worn or damaged.

Gear pump or piston (traction) pump is worn or damaged.

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Machine operates in one direction

only.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Traction control linkage is faulty.

System charge check valve and/or system relief valve is defective.

ÁÁÁÁÁÁÁÁÁÁÁÁÁ

Traction pedal is sluggish.

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Traction control linkage is stuck or binding.

Charge pressure is low.

Piston (traction) pump servo control valve orifices are plugged or

damaged.

Piston pump manual servo control assembly is damaged.

Piston pump or wheel motor(s) is worn or damaged.

Brand	Toro
Model	Multi Pro 5800
Category	Paint Sprayer
Language	English

Toro Multi Pro 5800 Service Manual

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