Filter
Top Products
Reelmaster 3550−D Hydraulic SystemPage 4 − 101
Removal (Fig. 65)
The ports on the mow control manifold are marked for
easy identification of components. Example: PRV is the
proportional relief valve and P is the supply port (see Hy-
draulic Schematic to identify the function of the hydraulic
lines and cartridge valves at each port location).
The mow control manifold is located on the left side of
the traction unit frame. Access the manifold from above
through the hinged floor plate in front of the operator’s
seat, or from behind (below the traction unit frame).
1. Park machine on a level surface. Lower cutting units,
stop engine and engage parking brake. Remove key
from the ignition switch.
2. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
3. To prevent contamination of hydraulic system during
manifold removal, thoroughly clean exterior of mow con-
trol manifold and fittings.
4. Disconnect wire harness connector from the propor-
tional relief valve coil (PRV) and the backlap switch
(SW) on the mow control manifold.
5. Disconnect hydraulic lines from manifold and put
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper installation.
6. Remove the two (2) flange head screws from under
the manifold that secure the manifold to the frame.
7. If hydraulic fittings are to be removed from manifold,
mark fitting orientation to allow correct assembly. Re-
move fittings from manifold and discard O−rings.
NOTE: Refer to Mow Control Manifold Service in this
chapter for information on cartridge valve removal and
installation.
Installation (Fig. 65)
1. If fittings were removed from mow control manifold,
lubricate and place new O−rings onto fittings. Install fit-
tings into manifold openings using marks made during
the removal process to properly orientate fittings. Tight-
en fittings (see Hydraulic Fitting Installation in this chap-
ter).
2. Install mow control manifold to the frame.
3. Remove caps and plugs from fittings and hoses. Us-
ing labels placed during manifold removal, properly con-
nect hydraulic lines to manifold (see Hydraulic Hose and
Tube Installation in the this chapter).
4. Connect wire harness connector to the proportional
relief valve coil (PRV) on the mow control manifold.
5. Make sure hydraulic tank is full. Add correct oil if nec-
essary before returning machine to service.
Hydraulic
System