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| Illustration 1 | g00384836 |
Location of Components (1) Ripper cylinder (2) Quick-drop valves (3) Bulldozer tilt cylinder (4) Bulldozer lift cylinders (5) Fan hydraulic motor (6) Bulldozer tilt cylinder (7) Oil cooler (8) Bypass valve (9) Fan pump (10) Implement hydraulic pump (11) Dual tilt valve (12) Hydraulic tank and filter (13) Pilot valves (14) Bulldozer control valve (15) Pin puller control (16) Ripper control valve (17) Pin puller cylinder | |
The hydraulic system controls the operation of the bulldozer and ripper.
The hydraulic system can be different for machines according to the optional equipment that is on the machine.
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| Illustration 2 | g00465794 |
(18) Bulldozer control lever (19) Ripper control lever (20) Pin puller switch | |
The hydraulic system is a continuous (loop) flow design that permits minimum pressure in the system when the control valves are not activated.
The pump for the bulldozer and ripper operation is a two-section pump. The pump has a large section and a small section.
The oil from the small pump section flows to the tilt circuit in the bulldozer control valve.
The oil from the large pump section has two outlets.
One outlet goes to the ripper control valve for lift and tip circuits.
Oil flow to the ripper control does not flow through when the valve spools are in the HOLD positions.
The other outlet from the large pump section sends oil to the bulldozer control valve for the lift circuit.
Oil from the small pump section adds to the large pump section oil flow when the tilt circuit is not active.
When the tilt, lift and ripper circuits are not active, oil from both pump sections flows through the bulldozer control valve to the hydraulic tank.
The pressure of oil from both pump sections is less then 700 kPa (100 psi).
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| Illustration 3 | g00465796 |
(10) Implement hydraulic pump | |
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| Illustration 4 | g00465798 |
(14) Bulldozer control valve | |
Pilot valves (13) are part of the pilot oil system that controls the tilt and ripper valve spools. Oil for the pilot system comes from the hydraulic pump for the fan.
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| Illustration 5 | g00465799 |
(13) Pilot valves | |
Bulldozer control lever (18) controls the lift and tilt operations of the bulldozer. Two linkages are connected to lever (18) .
One lever is connected directly to the bulldozer lift spool. The other linkage is connected to the pilot valve for bulldozer tilt control.
Ripper control lever (19) controls the lift and tip operations of the ripper. Two linkages are also connected to ripper control lever (19) .
One lever is connected to the pilot valve for ripper lift control. The other lever is connected to the pilot valve for ripper tip control.
Pin puller control switch (20) controls the operation of the pin puller cylinder on machines with a single shank ripper.
Switch (20) is connected by wiring harness to a solenoid valve located on the ripper cylinder mounting bracket.