New Holland CX720 Repair Manual page 2798

2WD-4WD SYSTEM Hydrostatic - Leakage test (D.14.E - F.40.A.40)
1. If an excessive amount of leakage in the RWD or hy-
drostatic system is suspected, testing the RWD sys-
tem can help to isolate the problem. Testing the RWD
system will help determine whether the problem is lo-
cated in the RWD system or in the hydrostatic sys-
tem. Use the following procedure to test leakage in
the RWD system:
Use extreme caution when performing the following
procedure. Failure to use caution and follow the
proper procedure can result in death or serious injury.
Be sure work area is clear and any obstacles around
the machine are removed from the area. M949
Pressurized hydraulic fluid can penetrate the skin and
cause severe injuries. Tighten all of the connections
before starting the engine. If hydraulic fluid has pene-
trated the skin, seek medical assistance immediately.
M950
2. Warm the combine hydraulic fluid to normal oper-
ating temperature before beginning pressure tests.
Park the combine on a level surface and engage the
parking brake.
3. Check the hydraulic fluid level in the reservoir. Add
hydraulic fluid if necessary.
IMPORTANT: Do not allow grease or dirt to enter the Equa-
Trac II valve or wheel motors, otherwise damage to the
valve or motor may result.
4. Clean all grease and dirt from the Equa-Trac II valve
and hose connections at the wheel motors.
5. Disconnect the case drain return-to-tank line (1) for
the E-T II valve case drain at the valve. Plug the
return-to-tank drain line.
NOTE: The direction of hydraulic fluid flow will be from the
E-T II valve to the tank (hydraulic reservoir), make sure the
inline flow meter is installed correctly.
TRAVELLING - 2WD-4WD SYSTEM Hydrostatic
WARNING
WARNING
2 4/7/2006
D.14.E / 44
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