FLOW DIVIDERS
SUB-SECTION SD
If no mechanical problems exist with the boom and the
FLOW DIVIDER (36Q46)
control, valve is functioning properly, the problem is prob.
ably caused by contamination or excessive leakage within
DESCRIPTION
the flow divider. In this case, the piston sub-assembly with.
in the flow divider should be removed, cleaned and in-
Flow divider 36Q46 is a pressure compensated fixed flow
valve which divides one input flow proportionally into two
spected.
output flows.
REPAIR
As flow enters the inlet port it is divided into two flows,
each of which passes through a calibrated orifice in one of
GENERAL. Repair of this valve should be limited to the
the two pistons and out through their respective outlet
replacement of seals and piston sub-assembly, or the com-
ports (see Figure 5D-3). If flows tends to become greater at
plete flow divider.
one of the outlet ports, the resulting pressure drop across
that piston will force the linked pistons to shift in that
REMOVAL. To remove the flow divider, proceed as fol-
direction, restricting flow through that outlet port. Any
lows:
other changes in inlet or outlet pressure will cause the pis-
tons to shift similarly to restrict or allow flow through the
NOTE
valve, thus providing a constant flow to each outlet port.
It is not necessary to remove the flow divider from
TROUBLESHOOTING
the machine to remove the piston sub-assembly. Be
sure the flow divider is not subjected to pressure as
A malfunctioning flow divider will cause one boom section
described in Step 1 before removing the piston sub-
to extend or retract faster than the other. Improper boom
assembly.
sequencing can, however be caused by a mechanical prob-
lem within the boom itself or by a fault in the boom tele-
1. Loosen the fittings at the inlet and outlet ports, but
scope control valve.
do not disconnect the fittings. Tap the fittings gently to
break the oil tight connection. This will allow my pressure
Since improper boom sequencing can be caused by a faulty
which might be trapped in the circuit to escape.
flow divider, a mechanical problem within the boom, or a
faulty control valve, it is recommended that the boom and
2. Disconnect the fittings attached to the inlet and outlet
control valve be thoroughly inspected before the flow di-
ports, and remove the flow divider.
vider is removed.
Figure 5D-3. Flow Divider Operation
5D-3