Check Valves

causym CAUTION: To avoid injury from escaping hydraulic oil, relieve pressure from system.

Foreign material can work its way into the valves and cause them to stick open or closed. To check the valves, proceed as follows:

1. Lower planter with engine running.

2. Place hydraulic lever in "Float" position and PLANT-TRANS switch in "Plant" position. Depress all remaining switches in both directions.

3. Place PLANT-TRANS switch in "Trans" position. Depress all remaining switches in both directions.

4. Leave SCV in "Float" position and shut off engine.

5. Clean area around solenoid of any debris.

NOTE: Some solenoid covers have a thin washer beneath the cover.

6. Remove from solenoid:

  • nut
  • thin washer, if equipped
  • cover

7. Lift solenoid from valve.

A47959

720016ROM,TS,N -19-22MAY09-1/3

8. Remove valve (A).

9. Place valve in solvent and press poppet inside of valve back and forth to dislodge any foreign material from the valve.

10. Inspect threads on both ends of valve for rust or oxidation. Use a wire brush to clean threads.

IMPORTANT: Do not overtighten valves. Valve bodies distort and cause valves to stick or hang up.

NOTE: SV1 or SV3 is stamped on hex of valve.

11. Install valve. Tighten SV3 valves (small hex valve) to specification.

Specification

SV3 Valve -Torque 47.5 N·m (35 lb.-ft.)
Tighten SV1 valves (large hex valve) to specification.

Specification

SV1 Valve -Torque 102 N·m (75 lb.-ft.)

12. Install solenoid and washers.

13. Install nut on top of solenoid. Tighten nut to specification.

Specification

Nut -Torque 6.5 N·m (57 lb.-in.)

14. If problem still exists, replace valve.

A47960


A-Valve

720016ROM,TS,N -19-22MAY09-2/3

A64629

Warning Tag Location

Counter-Balance Valves

causym CAUTION: Before disconnecting main frame lift cylinder hoses (A), place control box in "Plant" position. Lower machine to the ground. Hydraulic pressure must be relieved. Refer to tractor Operators Manual for SCV operation.

Machine is equipped with two counter balance valves inside the main valve body. Counter balance valves are used as a safety feature to hold the machine in the up position.

Before removing hose from base end of lift cylinders:

  • Lower planter completely with engine running.
  • Place PLANT-TRANS switch in "Plant" position.
  • Place hydraulic lever in "Float" position.
  • Depress all remaining switches in both directions.
  • Place PLANT-TRANS switch in "Trans" position.
  • Depress all remaining switches in both directions.
  • Leave SCV in "Float" position and shut off engine.
SSA70882

A-Warning Tag

720016ROM,TS,N -19-22MAY09-3/3