CAUTION
2WD MACHINE SHOWN
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
4
1
3
NOTE: IfmachineisequippedwithoptionalCrossTrax-
RIGHT
TM
AWD,reversereliefpressuretestportsarelocatedon
hydraulic manifold.
FRONT
CrossTrax
TM
2
4.
lictubefordirectiontobechecked(Fig.22and23).Con-
nect a 5000 PSI (350 bar) pressure gauge to test port.
Thoroughly clean traction circuit test port on hydrau-
Figure 22
1.
2.
RH wheel motor
LH wheel motor
3.
4.
Forward test port
Reverse test port
5.
speed. Check for any hydraulic leakage from test con-
nections and correct before proceeding with test.
After installing tester, start engine and run at idle
2WD MACHINE SHOWN
2
6.
7.
Move throttle to full speed (3200 RPM).
Sit on seat, and with brakes applied, slowly depress
the traction pedal in the direction to be tested (forward
or reverse). While pushing traction pedal down, careful-
ly watch the pressure gauge needle. As the traction re-
lief valve lifts, the gauge needle will momentarily stop.
Traction system pressure as the relief valve opens
should be:
1
Figure 23
Approximately 3825PSI(264bar)inbothforward
(R3) and reverse (R4)
1.
Forward test port
2.
Reverse test port
NOTE: If traction pedal continues to be pressed after
the relief valve has opened, system pressure can in-
crease higher than relief pressure.
3
8.
Release traction pedal, stop engine and record test
results.
NOTE: Forward (R3) and reverse (R4) relief valves are
identical. Relief valves can be switched in traction pump
to help in identifying a faulty relief valve.
1
9.
If problem occurs in one direction only, interchange
RIGHT
the relief valves in the traction pump (Fig. 24) to see if
the problem changes to the other direction. Clean or re-
place valves as necessary. These cartridge type valves
arefactoryset,andarenotadjustable.Ifreliefvalvesare
in good condition, traction pump and/or wheel motors
should be suspected of wear and inefficiency.
FRONT
2
Figure 24
3.
1.
2.
Piston (traction) pump
Reverse relief valve (R4)
Forward relief valve (R3)
10.After
testing is completed, make sure that engine is
stopped and then relieve hydraulic system pressure
(See Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter). Remove pres-
sure gauge from machine.
Reelmaster 5010 Series
Page 4 -- 29 Rev. B
Hydraulic System
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