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Reelmaster 3550−DHydraulic System Page 4 − 30
Mow Circuit Problems
Problem Possible Cause
Gear pump is noisy (cavitation). Hydraulic tank oil level is low
(NOTE: Other hydraulic systems are affected as well).
Suction line is restricted.
Suction line has an air leak.
None of the cutting reels will turn.
NOTE: To engage the mow circuit,
the seat must be occupied, the cut-
ting units must be fully lowered, the
mow/transport switch must be in the
MOW position and the reel enable/
disable switch must be in the EN-
ABLE position.
Solenoid valve (PRV) is stuck open.
An electrical problem exists that prevents the PRV solenoid valve in
mow control manifold from being energized (See Chapter 5 − Elec-
trical System in this manual).
Gear pump is worn or damaged.
Poor after−cut appearance (cutting
blades(s) turn too slowly).
NOTE: If possible, have another
person observe the machine while
mowing in dense turf prior to hy-
draulic testing. A bad reel motor
will run slower, produce fewer clip-
pings, and may cause marcelling
(a washboard appearance) on the
turf.
All Cutting Units:
Flow control (FC) in mow control manifold requires adjustment.
Solenoid valve (PRV) is faulty.
Gear pump (P1) is inefficient (see Testing in this chapter).
One or more Cutting Units:
Cutting unit motor has internal leakage (see Testing in this
chapter).
Rear Cutting Units:
Relief valve (RV) is out of adjustment or faulty.
Single Cutting Unit:
Cutting unit reel bearing(s) is (are) damaged.