Greensmaster 3150 Hydraulic SystemPage 4 -- 43
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.Makesuretheh ydrau-
lic tank is full.
CAUTION
Before continuing further, read and become fa-
miliar with Precautions for Hydraulic Testing.
3. Disconnecthydraulichosefromthefrontfittingofthe
left front cutting reel motor (Fig. 27).
4. Install tester with pressure gauge and flow meter in
series with the disconnected hose and front reel motor
fitting. Makesure the flow control valveon thetester
is fully open.
5. To prevent reeldamage,temporarilyadjust bedknife
to allow clearance between bedknife and reel (no con-
tact).
6. Makesurethatreelspeediss ettohighestspeedset-
ting (fully open) and that backlap knob on the hydraulic
manifold is in the mow position.
CAUTION
Keep away from reels du ring test to prevent per-
sonal injury from the rotating reel blades.
7. Start engine and move throttle to high idle speed
(2850 +
50 RPM). Engage the cutting units.
8. Watch pressure gaugecarefully whileslowly closing
the flow control valve on the tester t o fully closed.
9. System pressure should be from 2700to3300PSI
(186 to 228 bar) as manifold reliefvalve (S1R1) opens.
Record test results.
10.After recording mow circuit relief pressure, disen-
gagecuttingunits.Opencontrolvalveontesterandshut
off engine.
A. If relief valve pressure is correct, go to step 11.
B. If relief valvepressure is notcorrect, remove so-
lenoid relief valve (S1R1) on hydraulic control man -
ifold (Fig. 28).Clean or replace valve (see Hydraulic
Manifold Service in the Service and Repairs section
ofthischapter).Aftervalveservice,retestreliefvalve
(S1R1) pressure.
11.When testing is complete, disconnect tester from
reelmotorfittingandhydraulichose.Reconnecthoseto
the front motor fitting.
12.Correctly adjust cutting unit bedknife.
Figure 27
3
1
FRONT
1. LH reel motor
2. Front fitting
3. Hydraulic hose
LH REEL MOTOR
2
Figure 28
FRONT
S4
S3
S1R1
S2
R2
Hydraulic
System
To Next Page
Loading...
