Toro Reelmaster 7000-D Service Manual page 147

Cooling Fan Circuit − Pressure Test
The cooling fan circuit test should be performed to make
sure that the engine cooling fan circuit has the correct
system pressure, and therefore, fan speed.
Special Equipment Required:
S Pressure Gauge − 5000 PSI (350 bar) with hose
S Phototach (non−contact tachometer)
1. Park machine on a level surface with the cutting units
lowered and the reel enable/disable switch in the DIS-
ABLE position. Make sure engine is off and the parking
brake is applied.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
2. Raise and support hood to gain access to fan control
manifold (Fig. 43). Connect a 5,000 PSI (345 bar) gauge
with hydraulic hose attached to test fitting in port G2 on
rear of manifold.
3. After installing pressure gauge, start engine and run
at low idle speed. Check for hydraulic leakage and cor-
rect before proceeding with test.
4. Set throttle to high speed.
A. Use the InfoCenter display to verify engine RPM
on units with Yanmar diesel engines (2850 RPM).
B. Use a phototach to verify engine RPM on units
with Kubota diesel engines (2850 +50/−120 RPM).
5. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.
CAUTION
Cooling fan blades will rotate during the test pro-
cedure. Keep away from cooling fan blades dur-
ing test to prevent personal injury from rotating
blades.
Reelmaster 7000−D
2
1. Fan control manifold
2. Test fitting (port G2)
6. Use a phototac to identify the cooling fan speed while
monitoring the pressure gauge. Disconnect the wire
harness connector from the proportional relief valve so-
lenoid at fan control manifold port TS. Both fan speed
and pressure should increase and stabilize after the so-
lenoid is disconnected.
PRESSURE GAUGE READING TO BE approxi-
mately 3000 PSI (207 bar)
FAN SPEED TO BE approximately 2900 RPM
7. Stop engine and record test results.
8. If specifications are not met:
A. If pressure rises to approximately 3000 PSI
(207 bar) but fan speed is low, consider that the fan
motor is worn or damaged. (see Fan Motor Case
Drain Leakage Test in this chapter).
B. If pressure and fan speed are both low, consider
that gear pump P5 is worn or damaged (see Gear
Pump Flow Test in this section).
9. When testing is complete, remove pressure gauge
and hose from manifold fitting and reconnect wire har-
ness to proportional relief valve solenoid. Install dust
cap to test port fitting. Lower and secure hood.
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1
Figure 43
3. Proportional relief valve
solenoid
Hydraulic System