Hydraulic Manifold; Removal; Disassembly; Cleaning And Inspection - Snorkel SL26RTE Parts & Service Manual

HYDRAULIC MANIFOLD

Though it is not always necessary to remove the manifold to perform maintenance procedures, a
decision should be made prior to beginning as to whether or not the manifold should be removed
before maintenance procedures begin. This work should only be carried out by competent and ap-
proved technicians in a clean environment.

REMOVAL

1. Turn isolator switch to the OFF position.
2. Tag and disconnect the solenoid valve leads.
3. Tag, disconnect and plug the hydraulic hoses.
4. Remove the bolts that hold the manifold to the mounting bracket.
5. Remove manifold block.

DISASSEMBLY

NOTE: Mark all components as they are removed to avoid confusion of their location during
assembly. Refer to the valve block drawing and schematic regularly to aid in disassembly
and assembly.
1. Remove coils from solenoid valves.
2. Remove spool valve covers and spool valves.
3. Remove solenoid valves, main relief valve, counterbalance valves and emergency lowering
valves. Remove fittings, plugs, springs, balls and orifices.

CLEANING AND INSPECTION

1. Wash the manifold in cleaning solvent to remove built up contaminants and then blow out all
passages with clean compressed air.
2. Inspect the manifold for cracks, thread damage and scouring where the O-rings seal acts
against internal and external surfaces.
3. Wash and dry each component and check for thread damage, torn or cracked O-rings and
proper operation.
4. Replace parts and O-rings found unserviceable.

ASSEMBLY

NOTE: Lubricate all O-rings before installation to prevent damage to O-rings. Seat all balls in
manifold block by lightly tapping on the ball with a brass drift.
1. Install fittings, plugs, balls and orifices. Use one drop of loctite #242 on each screw-in orifice.
2. Install emergency lowering valves, counterbalance valves, main relief valve, break pressure
reducing valve, solenoid valves and spool valves.
3. Install coils on solenoid valves.

INSTALLATION

1. Attach manifold assembly to mounting plates with bolts.
2. Connect solenoid leads (as previously tagged).
3. Connect hydraulic hoses. Be certain to tighten hoses to manifold.
4. Operate each hydraulic function and check for proper operation and leaks.
5. Adjust all hydraulic pressures according to instructions.
SL26/30SL
SERVICE AND REPAIR
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