Hydraulic Manifold; Removal; Disassembly; Cleaning And Inspection - Upright X Series Service & Parts Manual

Section
4.7

4.7 Hydraulic Manifold

(Figure 4-11)
Though it is not necessary to remove the manifold to
perform all maintenance procedures, a determination
should be made as to whether or not the manifold should
be removed before maintenance procedures begin.

REMOVAL

1. Tag and disconnect the solenoid valve leads.
2. Tag, disconnect and plug hydraulic hoses.
3. Remove the bolts that hold the manifold to the mod-
ule, being careful not to damage the ground wires.
4. Remove manifold block.

DISASSEMBLY

NOTE: Mark all components as they are removed so as
not to confuse their location during assembly. Refer to
Figure 4-11 often to aid in disassembly and assembly.
1. Remove coils from solenoid valves.
2. Remove solenoid valves, relief valves and counterbal-
ance valves.
3. Remove fittings and plugs.

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
scoring where O-rings seal against internal and external
surfaces.
3. Wash and dry each component and check for thread
damage, torn or cracked O-rings and proper opera-
tion.
4. Replace parts and O-rings found unserviceable.
4-10
Maintenance

ASSEMBLY

Note: Lubricate all O-rings before installation to prevent
damage to O-rings.
1. Install fittings and plugs.
2. Install counterbalance valves, relief valves and solenoid
valves.
Note: Refer to Table 4-2 for the proper torque values
when installing any hydraulic component.
3. Install coils on solenoid valves.

INSTALLATION

Note: Refer to Table 4-2 for hydraulic component
torque specifications.
1. Attach manifold assembly to module with bolts, make
sure all the ground wires are attached with the front
right hand bolt.
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
function and leaks.
5. Adjust all relief valves mounted on the Hydraulic
Manifold according to instructions in Section 4.5 .
X-Series Work Platform