A daily check of the hydraulic control should be made to see if there are any loose nuts, bolts, or parts worn to such an extent that they are no longer serviceable. If corrective steps are taken immediately upon discovery of loose or worn parts, fewer enforced stops and more economical operation will result.
Dirt should not be allowed to accumulate and pack on the hydraulic control. A few minutes spent daily in keeping it clean are well repaid in greater ease and safety of operation.
Connections in the hydraulic system should be checked for looseness that might result in leakage. The hydraulic hoses should be inspected for signs of leakage or wear because hoses move and can rub against each other as well as against parts of the tractor during operation. Replace the hoses showing signs of leakage or signs of sufficient wear to permit leakage or breakage. See the topic, CARE OF THE HYDRAULIC SYSTEM. This inspection can be made more easily by keeping the hydraulically controlled equipment and tractor clean.
Hydraulic System
Cleanliness is essential in the hydraulic system and care should be taken to keep it clean.
It should seldom be necessary to add oil if connections are tight and hoses are in good condition.
The control levers and rods should be kept in correct adjustment to prevent partial opening or closing of the control valves.
Check hoses and lines frequently for leakage or wear. A broken hose or faulty connection can eject oil under high pressure causing unnecessary loss of oil and possible damage.
Whenever hoses or lines are removed, cover all openings to exclude dirt. Install new seals where necessary. Replacement hoses are available from your AVSpare dealer.
Positioning Hoses: Due to manufacturing methods there is a natural curvature to hydraulic hose. The hose should be installed so any bend is with this curvature. Connect both ends of the hose with the flange bolts finger tight. Position the hose so it does not rub the machine or other hoses, and has a minimum of bending and twisting. Tighten both sets of flange bolts.
Hydraulic Cylinder Packing: Hydraulic cylinder packing leakage can be caused by wear, cuts and/or distortion of the packing.
To adjust:
- 1. Lower equipment to ground.
- 2. Remove bolts from gland (1).
- 3. Pry or tap gland out to permit removing shim (2).
REMOVING SHIM
1-Gland. 2-Shim.
Remove one shim at a time. If after removing two shims the cylinder still leaks, consult your AVSpare dealer for installation of new packing. Do not continue to remove shims as excessive tightening of the gland or distortion of the packing will result.