Toro Greensmaster 3250-D 04383 Service Manual page 85

Procedure for Mow Circuit Relief Valve (R1) Pres-
sure Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes.
2. Park machine on a level surface with the cutting
units lowered. Make sure engine is off and the parking
brake is engaged. Make sure the hydraulic tank is full.
CAUTION
Before continuing further, read and become fa-
miliar with Precautions for Hydraulic Testing.
3. Disconnect hose connection on the bulkhead that
leads to the left reel motor.
4. Install tester with pressure gauge and flow meter in
series with the disconnected hose and bulkhead con-
nection. Make sure the flow control valve on the test-
er is fully open.
5. To prevent reel damage, temporarily adjust bed-
knife to allow clearance between bedknife and reel (no
contact).
6. If a backlap kit is installed, make sure backlap knob
on the hydraulic manifold is in the mow position. Make
sure reel speed knob (FC1) is set to highest speed set-
ting (fully open).
CAUTION
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
7. Start engine and move throttle to full speed (2750 +
50 RPM. Engage the cutting units.
8. Watch pressure gauge carefully while slowly clos-
ing the flow control valve on the tester to fully closed.
9. On machines with serial number under 260999999,
system pressure should be from 2160 to 2640 PSI (149
to 182.2 bar). Note: If a dethatching kit is installed, sys-
tem pressure should be from 2700 to 3300 PSI (186.3
to 227.7 bar). Record test results.
A. If this specification is met, go to step 11.
B. If specification is not met, shut off engine and
adjust relief valve (R1) (Fig. 18) (see Adjust Man-
ifold Relief Valves in the Adjustments section of this
Chapter). After adjustment, retest relief valve (R1)
pressure.
Greensmaster 3250--D
10. On machines with serial number above 270000000,
system pressure should be from 2700 to 3300 PSI
(186.3 to 227.7 bar). Record test results.
A. If this specification is met, go to step 11.
B. If specification is not met, open control valve on
tester, shut off engine and remove solenoid relief
valve (S1R1) on manifold (Fig. 19). Clean or replace
valve (see Hydraulic Manifold Service (Serial Num-
ber Above 270000000) in the Service and Repairs
section of this chapter). Retest relief valve (R1)
pressure.
11. Disengage cutting units. Open control valve on test-
er and shut off engine.
12. Disconnect tester from manifold and hose. Recon-
nect hose to the bulkhead connection.
13. Correctly readjust bedknife.
FRONT
FRONT
S1R1
MANIFOLD FROM MACHINE
WITH SERIAL NUMBER
OVER 270000000 SHOWN
Page 4 - - 47
MANIFOLD FROM MACHINE
WITH SERIAL NUMBER
UNDER 260999999 SHOWN
RELIEF
VALVE (R1)
Figure 18
S2
S3
R2
Figure 19
Hydraulic System (Rev. I)
S4