Alamo HYDRO 15 - Manual (Page 107)

Section 6 - 3
HYDRO 15 (Service Manual) 09/06
© 2006 Alamo Industrial
Fill Hydraulic Tank Return Filters - Service & Repair
Hydraulic Tank:
Hydraulic tank is bolt on assembly, hydraulic tank houses return filters (figure 4 & 6), oil level sight
glass and two return oil pressure gauges. The filler cap is a breather type. The center section returns through the
back filter and the wings return through the front filter. Each filter will have a return pressure gauge
(figure 4 & 5).
1. Clean The Machine - The deck and hydraulic tank should be cleaned off at least once a day. Remove all
foreign material from the deck, Tank and structural members. Never allow collected grass and dirt to remain
in the deck or around the hydraulic tank. This material will decompose forming ammonia compounds which
will erode the paint and metal deck it will also prevent the tank & oil cooling tubes from dissipating heat
Green Area "Good"
(0 psi to 15 psi)
Red Area "Replace Filter"
(16 psi to 60 psi)
Vent (Cut Off
Top)
1/4" NPT
Return Pressure Gauge
(Glycerin Filled)
FIGURE 5
efficiently. This material is also a source
of contamination any time the hydraulic
system is opened or service. Keep the
deck area clean and always clean before
starting any service or repairs.
2. To change filter cartridge it is not re-
quired to unbolt filter assembly from tap. It
will require the removal of the filter housing
cover (figure 6) by unbolting the filter cover
bolts (figure 6). There is a spring under the
cover that presses down against the filter
cartridge, hold down on the filter cover as
you unbolt it. Lift the cover off and the spring
under it. Hold a small drain pan as close to
the filter housing as possible, this will allow
you to pull the filter cartridge straight up out
of housing and move it over the drain pan as
quickly as possible. This will limit the amount oil
leaking down on tank and deck.
3. Return filter gauge is low pressure gauge. It will
read high (in the red) when oil is cold and unit is first
started. Run unit at lower RPM until oil reaches normal
operating temperature. Recheck gauge, the return
should be reading in the green, if it is not check
system for blockage or other problem restricting the
return flow. NEVER connect the pressure side direct
to the colling tubes on deck, this will damage them.
FIGURE 4
Return Pressure Gauges
Sight Gauge
Return Filters
Filler Cap
Filter Asy to
Tank Bolts
Filter Asy to
Tank Gasket
Filter Housing
FilterReturn
Gage Port
FilterHousing
Cover
Filter Housing
Cover Bolts
FIGURE 6
Filter Oil to
Tank Return
Oil to Filter Asy
Return Port
Return Filter
Cartrige Inside