Section 1
1 - 9
Motor (See Fig. 1-12)
The hydraulic motor is a bent axis variable displacement
motor. The default position of the motor is maximum
displacement. Control pressure operates a servo that
proportionally reduces motor displacement. At higher
motor pressure, a pressure compensator override (PCOR)
valve will shift the motor back to maximum displacement.
Figure 1-12 Hydraulic Motors
PCOR
The Pressure Compensator OverRide (PCOR) allows
the motor to shift between maximum and minimum
displacement depending on pressure. If the PCOR
pressure is set incorrectly, the winch may not be able
to shift to maximum displacement, causing a stall in the
motor. If the PCOR is set higher than the system pressure
of the machine hydraulics, the PCOR will never be allowed
to shift causing the winch to be stuck in high speed. See
Section 3 for testing procedures to evaluate if the PCOR
is set correctly for your application.
51V Series Motor
Last used on SN H12E***1085***
H1B Series Motor
First used on SN H12E***1086***
Case Drain
Minimum Displacement Adjustment
Pressure Compensator Override (PCOR) Valve
X1 Pressure Port
Motor A Port
Motor B Port
M5 Port
Motor
A Port
Motor
B Port
Summary of Contents for H12E
Page 8: ...vi Notes ...
Page 48: ...General 1 40 Notes ...
Page 54: ...Section 1 1 46 Figure 1 35 H12E Hydraulic Electrical Schematic Option Code B CAT D8T C74 ...
Page 55: ...Section 1 1 47 Figure 1 36 H12E Hydraulic Electrical Schematic Option Code D CAT D8T C74 ...
Page 59: ...Section 1 1 51 Figure 1 40 H12E Hydraulic Electrical Schematic Option Code D CAT D8R C59 ...
Page 63: ...Troubleshooting 2 4 Notes ...
Page 75: ...Service 3 12 Notes ...
Page 90: ...Section 4 4 15 Intentionally Blank ...
Page 102: ...Section 4 4 27 Intentionally Blank ...
Page 108: ...Section 4 4 33 Intentionally Blank ...
Page 116: ...Section 4 4 41 Intentionally Blank ...
Page 119: ...Repairs 4 44 Notes ...
Page 120: ......