Toro Reelmaster 3555-D - Mow Circuit Problems

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Mow Circuit Problems

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Problem

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Possible Cause

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Gear pump is noisy (cavitation).

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Hydraulic tank oil level is low

NOTE: Other hydraulic systems are affected as well.

Suction line is restricted.

Suction line has an air leak.

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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.

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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). On Reelmaster 3555−D and 3575−D

machines, the problem may include an improperly adjusted or mal-

functioning turn around switch.

Gear pump is worn or damaged.

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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.

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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.

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