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Series 90 Functional Description 2
PV with Automotive Control (AC)
90000353
PV with Automotive Control Type II (AC II)
F000645
PV with 3-Position (FNR) Electric Control
90000354
PV with Electric Displacement Control
90000241
2.5.3 Electric Displacement Control (EDC)
The electric displacement control is similar to the
hydraulic displacement control with the input signal
pressure controlled by a pressure control pilot (PCP)
valve. The PCP valve converts a DC electrical input
signal to a hydraulic signal which operates a spring-
centered four-way servo valve. This valve ports hy-
draulic pressure to either side of a dual-acting servo
piston. The servo piston rotates the cradle swash-
plate through an angular rotation of
±
17
°
, thus vary-
ing the pump’s displacement from full displacement
in one direction to full displacement in the opposite
direction. The control is designed so the angular
position of the swashplate is proportional to the EDC
input. For neutral adjustment see
2.5.4 Automotive Control (AC and AC II)
Automotive Control (AC) allows a vehicle to be driven
in a manner similar to an automobile with an auto-
matic transmission.
The AC control includes a three-position electric
control to provide direction control.
The AC II control can be combined with a manual,
hydraulic, or electric displacement control to provide
both direction control and control over maximum
vehicle speed. It may also be combined with a 3-
position electric control to provide direction control.
2.5.5 3-Position (FNR) Electric Control
This control utilizes a 12 or 24 VDC electrically
operated spool valve to port pressure to either side of
the pump displacement control piston. Energizing
one of the solenoids will cause the pump to go to its
maximum displacement in the corresponding direc-
tion.
All functions of the three-position (FNR) electric con-
trol are preset at the factory. For repairs, see
Sec.
CONTENTS
Summary of Contents for PTV100/72
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Page 54: ...Contents iv 032015 PN 4 ...
Page 175: ...Troubleshooting 70 35 032015 PN 133 ...
Page 187: ...Troubleshooting 70 47 032015 PN 145 ...
Page 205: ...Warranty DX EMISSIONS EPA 19 12DEC12 2 2 TS1721 UN 15JUL13 90 6 032015 PN 163 ...
Page 213: ...Warranty DX EMISSIONS CARB 19 01AUG14 8 8 RG26036 UN 24JUN14 90 14 032015 PN 171 ...
Page 214: ...Warranty 90 15 032015 PN 172 ...
Page 220: ...Engine Registration IBC 2 032015 PN 178 ...
Page 223: ...Engine Registration IBC 5 032015 PN 181 ...
Page 224: ...Engine Registration IBC 6 032015 PN 182 ...
Page 225: ...SERVICE MANUAL ...
Page 262: ...saue Axial Piston Pumps and Motors Service Manual Series 90 CONTENTS ...
Page 348: ...saue 87 Series 90 Exploded View Parts Drawings 10 Notes CONTENTS ...
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