Multi Pro 1750 Hydraulic SystemPage 4 − 47
The ports on the boom lift control manifold are marked
for easy identification of components. Example: P is the
gear pump connection port and S1 is the location for so-
lenoid valve S1 (see Hydraulic Schematic in this chapter
to identify the function of the hydraulic lines and car-
tridge valves at each manifold port).
WARNING
Make sure that spray booms are fully raised and
resting in the boom cradles before loosening hy-
draulic lines, cartridge valves or plugs from lift
control manifold. If booms are not fully raised as
manifold components are loosened, booms may
drop unexpectedly.
See Cartridge Valve Service in this chapter. Tighten
cartridge valve and solenoid coil nut to specified torque
(Fig. 37).
See Hydraulic Solenoid Valve Coils in Chapter 5 − Elec-
trical System for information on testing the solenoid coil.
NOTE: The five (5) solenoid valve coils on the boom lift
control manifold are identical. To assist in troubleshoot-
ing, identical coils can be exchanged. If the problem fol-
lows the exchanged coil, an electrical problem likely
exists with the coil. If the problem remains unchanged,
something other than the solenoid coil is the problem
source (e.g. a hydraulic problem exists).
Hydraulic
System
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