New Holland CX720 Repair Manual page 2501

5. Loosen the suction line (3) at the pump until oil leaks
out. Tighten the suction line (3).
Loosen the hydrostatic motor drain plug (LI), Fig. 2.
6. Disconnect hose between the hydrostatic pump and
the oil cooler bypass valve at the pump (L2), port. Fill
the pump with oil through (L2), until oil leaks out of
the hydrostatic motor.
Tighten the hydrostatic motor drain plug (L1), Fig. 2,
to a torque of 34 N·m (25 ft.lbs.) and continue to fill
up the pump to obtain maximum oil level in the pump
case.
Connect and tighten hose from the oil cooler bypass
valve to the hydrostatic pump at port (L2).
POWER TRAIN - TRANSMISSION Hydrostatic
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