New Holland WorkMaster 50 Service Manual page 509

Steering circuit relief valve - Pressure test
NOTE: There is no relief valve in steering pump and the
following pressure test must only be performed as speci-
fied below. Failure to observe this precaution may result in
severe damage to the hydraulic pump.
1. Turn steering onto full left-hand side lock.
2. Disconnect left-hand side turn feed hose at steering
cylinder.
3. Install power steering pressure checking kit. (special
tool number 292870 with adapter 271318). As shown
in Fig. 1.
4. Start tractor and set engine speed to 1450 RPM. Turn
steering wheel to the left with a pull of approximately
22 N (5 lb) and observe the pressure reading.
NOTE: The use of a force greater than 22 N (5 lb) at the rim
of the steering wheel may lead to slightly inaccurate read-
ings due to the pumping action of the hydrostatic steering
motor.
If the steering test was satisfactory but pressure read-
ings are away from specification the relief valve in the
steering motor must be adjusted.
The pressure reading should be 110 - 125 bar (1595 -
1812 psi).
5. If the system pressure is not to specification proceed to
relief valve adjustment.
Steering - Hydraulic control components
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