Test No. 3: Check Reel Circuit Working And Relief Pressures - Toro Reelmaster
4000?D Service Manual

TEST NO. 3: Check Reel Circuit Working and Relief Pressures

Procedure For Working Pressure Check:
1. Install a 5,000 psi gauge into the cutting circuit quick
disconnect.
2. Operate the unit while monitoring the gauge.
RANGE OF TESTER READINGS 0 − 2750 PSI
3. If working pressure is too high or too low, perform re-
lief pressure check.
NOTE: Due to special conditions or customer prefer-
ence, the counterbalance may require setting outside
this recommended range. However, the range listed will
be adequate for most conditions.
Procedure For Relief Pressure Check:
1. Hydraulic oil must be at operating temperature.
2. Install a 5,000 psi gauge into the cutting circuit quick
disconnect.
3. Start the engine and lower the No. 2 (left front) and 3
(right front) cutting units to the ground.
4. Turn the engine OFF.
5. Block the reel of the No. 2 cutting unit to prevent rota-
tion. The No. 2 cutting unit motor is the first in series flow
from the pump. Use a substantial hardwood block in-
serted between the reel blades.
CAUTION
Stand clear of the reels during the following proce-
dures.
6. Place reel speed control knob at minimum.
7. Start engine and position throttle at idle.
8. Ease the reel control lever into "MOW" while monitor-
ing the gauge.
NOTE: It may be necessary to raise the throttle slightly
to prevent the engine from stalling.
TESTER READING TO BE 2650 − 2750 PSI
9. If reel circuit relief pressure is above 2750 psi or below
2650 psi, clean or replace relief valve in reel control
valve.
Reelmaster 4000−D
2
1. Cutting circuit test port
Page 4 − 33
1
Figure 17
2. Reel control valve
Hydraulic System