SUB-SECTION 5D
FLOW DIVIDERS
2. Disconnect the fittings attached to the inlet and outlet
TROUBLESHOOTING
ports.
A malfunctioning flow divider will cause one boom section
3. Remove the mounting capscrews and lockwashers which
to extend or retract faster than the other. Improper boom
secure the flow divider to the machine, and remove the
sequencing can, however, be caused by a mechanical prob-
lem within the boom itself.
flow divider.
Since Improper boom sequencing can be caused by a faulty
DISASSEMBLY. To disassemble the flow divider, proceed
flow divider or mechanical problems within the boom, it is
as follows (see Figure 5D-2):
recommended that the boom be thoroughly inspected be-
fore the flow divider is removed.
1. Remove the plugs at each end of the flow divider.
If no mechanical problems exist within the boom, the prob-
lem is probably caused by contamination or excessive leak-
2. Carefully push the piston sub-assembly out one end of
age within the flow divider. In this case, the piston sub-
the body. Do not disassemble the piston subassembly. If
assembly within the flow divider should be removed,
the pistons are worn or damaged, the entire sub-assembly
cleaned and Inspected.
should be replaced.
REPAIR
3. Remove the plugs at each end of the cross-over relief
valve. Remove the relief valve sub-assemblies and inspect
GENERAL. Repair of this valve should be limited to the
the poppet and seat for damage, and replace the part if
replacement of seals, the piston sub-assembly and relief
wear or damage is evident.
valve sub-assemblies, or the complete flow divider.
REMOVAL. To remove the flow divider, proceed as fol-
4. Wash all parts in a clean mineral oil solvent.
lows:
REASSEMBLY. Reassemble the flow divider in the reverse
1. Loosen the fittings at the inlet and outlet ports, but do
order of disassembly. Be sure to lubricate the piston and
not disconnect the fittings. Tap the fittings gently to break
relief valve sub-assemblies with clean hydraulic oil before
the oil tight connection. This will allow any pressure which
they are installed in the valve body.
might be trapped in the circuit to escape.
Figure 5D-2. Flow Divider (36Z680)
5D-2
