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Reelmaster 3550−DHydraulic System Page 4 − 2
Specifications
Item Description
Piston Pump (Hydrostat) Variable displacement piston pump
Charge Pressure Specification:100 to 150 PSI (6.9 to 10.3 bar)
Tested: 150 to 200 PSI (10.3 to 13.8 bar)
Maximum Displacement 1.44 in
3
/rev (23.6 cc/rev)
Traction Circuit Relief Pressure (Forward Only) 3500 PSI (241 bar)
Tandem Gear Pump 2 section positive displacement gear type pump
Maximum Displacement Section 1 (P1 − mow) 0.58 in
3
/rev (9.45 cc/rev)
Maximum Displacement Section 2 (P2 − steering & lift) 0.33 in
3
/rev (5.34 cc/rev)
Wheel Motors (see note) Orbital geroller motor
Front Wheel Motor Displacement 12.0 in
3
/rev (195 cc/rev)
Rear Wheel Motor Displacement 24.7 in
3
(405 cc)
Mow Circuit Relief Pressures
Front Cutting Units (PRV) 3000 PSI (207 bar)
Rear Cutting Units (RV) 1500 PSI (103 bar)
Lift Circuit Relief Pressure (RV1) Lower: 500 PSI (34.5 bar)
Raise: 1000 PSI (69 bar)
Cutting Unit Motors Gear motor
Displacement 0.73 in
3
/rev (11.96 cc/rev)
Steering Control Valve Distributor valve with rotary meter
Displacement 6.1 in
3
/rev (100 cc/rev)
Relief Valve Pressure 1000 PSI (69 bar)
Hydraulic Filters 10 Micron, spin−on cartridge type
In−line Suction Strainer 100 mesh (in tank)
Hydraulic Tank Capacity 6 U.S. Gallons (22.6 Liters)
Hydraulic Fluid See Traction Unit Operator’s Manual
NOTE: The three wheel motors are similar in construction with only minor differences. The right front wheel motor and rear wheel motor have a
reverse timed manifold, and the front left wheel motor does not. The end cover of the rear motor has a check valve consisting of a ball and spring,
and both front motors lack this feature.