q.
Lubricate the valve plate (9) and the cylinder block (10) with clean hydraulic oil. Install the end cap (4) while
holding the valve plate in place so it does not drop off during assembly.
r.
Install the four socket head bolts (2) which attach the end cap and tighten alternately until the internal spring has
compressed far enough for the end cap to rest on the housing (23). Tighten bolts to 62-80 ft. lbs.
s.
Install lock nut (1) and torque to 12-16 ft-lbs.
t.
It is suggested, that a new o-ring (38) be installed on the control and a new gasket (39) placed on the end cap
mating surface. Make certain the large hole on the gasket will mate with the o-ring on the control when
assembled.
u.
Place the control (42) on the end cap and reinstall mounting screws (40). Tighten to 61-69. in. lbs. torque.
Install retaining rings (36), coupling (37), o-rings (32, 35) and adapter (34). Install screws (33).
4-6.3.4 Maximum Flow Adjustment. Maximum volume or flow from the pump can be varied to match the application
requirement by turning the flow adjusting screw located on the back of the pump.
a.
Using appropriate wrenches, loosen the locknut and turn the adjusting screw clockwise to decrease maximum
pump flow or counterclockwise to increase maximum flow.
b.
The flow rate will be increased or decreased by approximately .15 in.3/rev. per turn for each complete turn of the
adjustment screw.
c.
Stops are provided to limit both minimum and maximum positions of the screw within the following angle and
displacement per revolution range.
Pump Size ............................................ L38
Swashplate Angle.................................. 7° to 18°
Displacement. ....................................... 0.9 in. 3/rev. to 2.3 in. 3/rev.
CAUTION
Excessive torque may damage threads and allow setting to change during operation.
Figure 4-15. Pump Flow Adjustment
4-67
