Toro 04384 Service Manual page 77

Procedure for Mow Circuit Relief Valve (S1R1) 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. Make sure the hydrau-
lic 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 front port of the left front reel motor (Fig. 25).
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 bedknife
to allow clearance between bedknife and reel (no con-
tact).
6. Make sure that reel speed is set to highest speed set-
ting (fully open) and that backlap knob on the hydraulic
manifold is in the mow position.
CAUTION
Keep away from reels during test to prevent per-
sonal injury from the rotating reel blades.
7. Start engine and move throttle to high idle speed
(2710 + 50 RPM). Engage the cutting units.
8. Watch pressure gauge carefully while slowly closing
the flow control valve on the tester to fully closed.
9. System pressure should be from 2700 to 3300 PSI
(186 to 228 bar) as relief valve (S1R1) opens. Record
test results.
Greensmaster 3250--D
10.After recording relief pressure, disengage cutting
units. Open control valve on tester and shut off engine.
A. If relief valve pressure is correct, go to step 11.
B. If relief valve pressure is not met, remove sole-
noid relief valve (S1R1) on hydraulic control manifold
(Fig. 26). Clean or replace valve (see Hydraulic Man-
ifold Service in the Service and Repairs section of
this chapter). After valve service, retest relief valve
(S1R1) pressure.
11. When testing is complete, disconnect tester from
manifold and hydraulic hose. Reconnect hose to the
bulkhead connection.
12.Correctly adjust bedknife.
FRONT
S1R1
Page 4 - - 45
TO LEFT FRONT
REEL MOTOR
Figure 25
S2
S3
R2
Figure 26
Hydraulic System
S4