4.1 GENERAL GUIDANCE
b
Before removing the SX 14 S control block from the machine, the block and its surroundings must first be properly cleaned (Do not subject the block directly to a pressurized water jet).No surrounding impurities must enter the hydraulic circuit: place plastic blanking pieces on the pipes and on the ports as soon as they are removed.
Wear protective clothing and use suitable equipment to avoid accidents, in particular with the fluid.
Use lifting rings and appropriate handling equipment.
Place all the actuators of the machine that are connected to the control block in the rest position (bearing on the ground, at the bottom stop, etc.) to avoid accidents due to uncontrolled movements when disconnecting the hydraulic circuit.
With the machine stopped: release stored pressures by moving all the distribution slides.
4.2 SX 14 S UNIT REMOVAL
- Fit a vacuum pump to the tank to limit oil leakage when connections are broken.
- As soon as lines are disconnected from the control block, plug all openings.
- Be sure to catch any escaped oil in an appropriate recipient.
- Unscrew the mounting screws and remove the control block.
4.3 SX 14 S UNIT REFIT
- Ensure all mating faces are perfectly clean.
- Check the mating face on the machine for flatness (Tolerance 0,5 mm).
- Check the condition of all seals on line connectors.
- Clean the block if it has been in prolonged storage.
-Correctly offer the block up to the machine and fix it in place with bolts.
- Connect the lines to the block as per the connecting diagram and the specified torques.
- Ensure that hoses are deployed so that are not twisted or rubbing on anything.
- When fitting has been correctly carried out, the control block can be put back into service:
- Decalibrate the LS relief valve before putting the machine into service.
- Keep one of the distributor lines activated after the hydraulic cylinder connected to it reaches its end stop.
b
On the distribution line in question, the value of the secondary pressure limiter must be greater than that to be set with the LS limiter.- Adjust the maximum pressure measured at M. with the LS pressure limiter.
- Retighten the locknut on the adjusting screw to torque: 20 ± 10% Nm.
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5.1 CHANGING THE LS LIMITER
NOTE: There is no need to remove the control block from the machine for this operation.
b
Machine stopped:- Place all the actuators of the machine connected to the control block in the rest position.
- Release stored pressures by moving all the distribution slides.
NOTE: Catch any escaped oil in an appropriate container.
On the inlet element, unbolt the LS limiter (17 mm spanner).
Reassembly: tightening torque: see section 6.
5.2 CHANGING THE FLOW REGULATOR
NOTE: There is no need to remove the control block from the machine for this operation.
b
Machine stopped:- Place all the actuators of the machine connected to the control block in the rest position.
- Release stored pressures by moving all the distribution slides.
NOTE: Catch any escaped oil in an appropriate container.
On the inlet element, unbolt the LS limiter (22 mm spanner).
Reassembly: tightening torque: see section 6.
Filter removal and replacement
Using flat-nosed pliers, remove the filter from the regulator.
Filter
b
Take care not to damage the O-ring at the end of the regulator.70
NOTE: There is no need to remove the control block from the machine for this operation.
b
Machine stopped:- Place all the actuators of the machine connected to the control block in the rest position.
- Release stored pressures by moving all the distribution slides.
NOTE:
- Fit a vacuum pump to the fluid tank in order to limit any oil leaks during this operation.
- Catch any oil leaks in an appropriate recipient.
- Unscrew the plug (12 mm Allen key).
- Remove the stop and the spring.
Reassembly: tightening torque: see section 6.
- Replace any defective parts.
- Replace the O-rings on the plugs.
- Reassembly is the reverse of removal.
5.4 FLUSHING VALVE REMOVAL
NOTE: There is no need to remove the control block from the machine for this operation.
b
Machine stopped:- Place all the actuators of the machine connected to the control block in the rest position.
- Release stored pressures by moving all the distribution slides.
Piston kit
O-rings Ball
Sealing kit
Selector kit
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(12 mm Allen key).
Reassembly:
- Replace the plug O-ring.
- Tightening torque: see section 6.
Remove: - the shim,
- the spring,
- the ring,
- the piston.
- Reassembly is the reverse of removal.
5.5 SLIDE REMOVAL
NOTE: There is no need to remove the control block from the machine for this operation.
b
Machine stopped:- Place all the actuators of the machine connected to the control block in the rest position.
- Release stored pressures by moving all the distribution slides.
NOTE:
- Fit a vacuum pump to the fluid tank in order to limit any oil leaks during this operation.
- Catch any oil leaks in an appropriate recipient.
- Remove the cover fixing screws (5 mm Allen key).
Reassembly: tightening torque: see section 6.
- Remove the cup and spring.
- Remove the O-ring from the cover.
- Extract the slide from the distribution element.
Reassembly: grease new seals when fitting.
b
Slide fitting direction.T3
Piston Shims Spring O-ring Stopper
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Preliminary operations:
- Remove the control block from the machine (see section 4).
- Remove the 3 assembly nuts (13 mm socket).
Reassembly: tightening torque: see section 6.
- Remove the output element (1).
- Separate the distribution elements (2) from the inlet element (3).
- Replace the O-rings between the distribution elements, the inlet element and the output element.
- If the inlet element is to be replaced, remove the tie rods.
- Reassembly is the reverse of removal. Ensure that tie rods are torqued to the correct torque.
- Before commencing, ensure that mating faces on the elements are clean.
Individual pressure compensator removal
- Unscrew the plug (7 mm Allen key).
- Remove the compensator piston.
- Clean the piston's nozzle with compressed air.
- Check the condition of the bore.
Reassembly: replace the O-ring and the anti-extrusion ring in the plug.
1 2
3
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- Unscrew the plug (5 mm Allen key).
- Remove the spring and the poppet.
- Visually inspect the parts for condition.
- If necessary, replace any defective parts.
Reassembly:
- Replace the plug O-ring.
- Tightening torque: see section 6.