Pressure Evaluation. With pressure gage installed and hydraulic motor locked as indicated
above, determine if by-pass pressure is actually low. If pressure is not low consult Table 3-1, Malfunc-
tion 3, for other items which may cause hydraulic motor to turn slow or not at all.
Hydraulic Motor Relief Pressure Adjustment. (Refer to fig. 3-2.) Adjust hydraulic motor
relief pressure as outlined below.
(1) Loosen jam nut one half inch hex and turn five thirty second inch Allen head screw in
so as to increase pressure. A pressure of 800 psi per turn may be expected.
Increase pressure to recommended level of 4000 to 4500 psi.
Retighten jam nut while holding screw.
Remove gage and replace nine sixteenth inch hex plug.
Figure 3-2. Hydraulic Motor Pressure Adjustment.