HYDRAULIC SYSTEM
4-31Z580/Z593/Z595 Diesel Service Manual
4
Hydraulic Flow Testing Procedure
1. Lift the back of the unit so the side being tested is off
the ground. Place jack stands under the rear frame
to support the unit. Remove the rear tire (Fig. 339).
Note: Be careful not to place jack stands near any
moving parts or areas not capable of sup-
porting the weight of the machine.
2. Clean any dirt or debris away from the hydraulic line
fi ttings. Mark each of the hoses and fi ttings so they
will be properly re-installed after testing. Remove the
hydraulic lines.
Note: Cap the fi ttings to prevent dirt from entering
the hydraulic system (Fig. 340).
Fig 339 PICT-3494
Fig 340 PICT-3496
The following procedure was performed on the right
hand wheel motor hoses. It can be performed on either
the right or left side of the machine.
Note: Cleanliness is a key factor in successful fl ow
testing of the hydraulic system. Thoroughly
clean all exposed surfaces prior to any type of
maintenance. Cleaning all parts with a solvent
wash and air drying is usually adequate.
As with any precision equipment, all parts
must be kept free of foreign material and
chemicals. Protect all exposed sealing areas
and open cavities from damage and foreign
material.
Hydraulic Flow Testing
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