Greensmaster 3250--D Hydraulic SystemPage 4 -- 4 5
Procedure for Mow Circuit Relief Valve (S1R1)
Pres-
sure
Test
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximatelyten
(10) minutes.
2. Parkmachineonalevelsurfacewiththecuttingunits
lowered.Makesureengineisoff.Makesurethehydrau-
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
leadstothefrontportoftheleftfrontreelmotor(Fig.25).
4. Install tester with pressure gauge and flow meter in
series with the disconnected hose and bulkhead con-
nection.Makesuretheflowcontrolvalve onthetest-
er is fully open.
5. To prevent reeldamage,temporarilyadjust bedknife
to allow clearance between bedknife and reel (no con-
tact).
6. Makesurethatreelspeedissettohighestspeedset-
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 carefullywhileslowly closing
the flow control valve on the tester t o fully closed.
9. System pressure should be from 2700to3300PSI
(186 to 228 bar) as relief valve (S1R1) opens. Record
test results.
10.After recording relief pressure, disengage cutting
units. Open control valve on tester and shut off engine.
A. If relief valve pressure is correct,gotostep11.
B. If relief valve pressure is not met, remove sole-
noidreliefvalve(S1R1)onhydrauliccontrolmanifold
(Fig.26).Cleanorreplacevalve(seeHydraulicMan-
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.
Figure 25
TO LEFT FRONT
REEL MOTOR
Figure 26
FRONT
S4
S3
S1R1
S2
R2
Hydraulic
System
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