Cub Cadet 5000 Series - Manual (Page 5)

Domestic Series 5000 Hydraulics
1
1. STANDARD HYDRAULIC SYSTEMS ON THE
DOMESTIC SERIES 5000: ORIENTATION
NOTE: Subsections 1 and 2 of the Domestic
Series 5000 Hydraulics portion of this manual
provide a basic orientation to the system. Sub-
section 3 and those that follow it contain specific
test procedures.
NOTE: Hydraulic diagrams are contained in an
appendix to this section.
1.1. The transmission housing acts as a reservoir for
all of the hydraulic systems on the tractor: hydro-
static drive pump, hydrostatic steering system,
lift cylinder, and accessories.
1.2. Fluid: the transmission and hydraulic system are
filled with 5.0 gallons (19.0 L) of Cub Cadet
Hydraulic Drive System Fluid Plus (P/N: 737-
3120 1Qt., 737-3121 1Gal.).
1.3. Filtration: The hydraulic system filter (P/N:723-
0405) is located on a boss on the front surface of
the transmission housing, adjacent to the mid-
mount, 2000 R.P.M. P.T.O. shaft.
See Figure 1.3.
Figure 1.3
system filter
Hydraulic
Suction tube
(feeds aux-
iliary pump)
1.4. The hydrostatic drive filter (P/N: BS-492932S) is
located on the return manifold, atop the trans-
mission. It is accessible through the opening
beneath the seat. See Figure 1.4.
NOTE: Other than sharing a reservoir, the
hydrostatic drive operates independently of the
rest of the hydraulic system.
1.5. The hydrostatic drive is a Hydrogear model
BDU-21L-400. It relies on the auxiliary pump to
produce charge pressure. The auxiliary pump
draws hydraulic fluid up the suction pipe from
the base of the transmission housing.
See Figure 1.5.
Figure 1.4
Hydrostatic
drive filter
Charge pressure tube
from aux. pump
to filter
Charge pressure tube
from filter to hydrostat
BDU-21L-400
Figure 1.5
Suction
tube
Auxiliary
pump
Return tube
Domestic Series 5000 Hydraulics