54
Service
Training
Hydraulic Circuit TX760
General Description
1. Oil drawn from the reservoir thru a strainer into the tandem gear pumps.
2. Oil from inner gear pump flows to steering priority flow valve.
3. If the steering orbitrol unit is in neutral the oil is directed to the loader control valve.
4. If steering wheel is turned, oil is directed to steering circuit by the priority flow valve.
5. Oil from outer pump flows thru the unloader valve and joins flow from the inner
pump prior to the oil flowing to the loader control valve and the backhoe valve.
6. Without any functions operating, the oil flows thru (front attachment) loader control
valve / (back attachment) backhoe control valve and thru the to the return line to the
backpressure valve.
7. The backpressure valve keeps pressure in circuit for operation of backhoe / loader
functions.
8. Without operating any functions, the loader and backhoe valve spools are in neutral,
the oil returns to tank past the backpressure valve then cooler and return filter.
9. When a backhoe function is operated, a spool is actuated in the backhoe control
valve; flow is blocked to tank. A load-sensing signal is sent to the loader control
valve, which closes the loader control valve-compensating valve and allows all
pump flow to the backhoe valve.
10. If loader functions are operated, oil is present at the loader valve.
Summary of Contents for Fermec 760
Page 5: ...5 Service Training SECTION 1 MACHINE SPECIFICATIONS Contents ...
Page 10: ...10 Service Training SECTION 2 CAB CONTROLS BASIC ELECTRICAL Contents ...
Page 11: ...11 SERVICE TRAINING Front Dash Controls Contents ...
Page 13: ...13 SERVICE TRAINING Wiring Harness Contents ...
Page 15: ...15 Service Training Older Models Contents ...
Page 17: ...17 Service Training 13 Contents ...
Page 18: ...18 Service Training Contents ...
Page 19: ...19 Service Training SECTION 3 ENGINE Contents ...
Page 30: ...30 789M048A Contents ...
Page 40: ...40 789M065A 789M066A 789M067A 789M068A Contents ...
Page 41: ...41 Service Training SECTION 4 TRANSMISSION Contents ...
Page 42: ...42 Service Training Contents ...
Page 52: ...52 Service Training SECTION 5 BASIC HYDRAULIC SYSTEM Contents ...
Page 55: ...55 33 Contents ...
Page 56: ...55 1 33 Contents ...
Page 61: ...59 Service Training SECTION 6 AXLES STEERING Contents ...
Page 67: ...65 Service Training DANFOSS Contents ...
Page 73: ...71 Service Training SECTION 7 BRAKES Contents ...
Page 83: ...79 Service Training SECTION 8 BACKHOE FUNCTIONS Contents ...
Page 85: ...81 Service Training Contents ...
Page 87: ...83 Service Training Contents ...
Page 89: ...85 Machine Circuit Diagram Backhoe Boom Selected to Raise Service Training Contents ...
Page 90: ...Contents ...
Page 91: ...Contents ...
Page 100: ...96 14 2 6 7 8 9 6 5 1 4 11 10 16 1 15 13 13 12 13 3 Contents ...
Page 101: ...97 Service Training SECTION 9 LOADER FUNCTIONS Contents ...
Page 103: ...99 Service Training Contents ...
Page 104: ...100 Service Training Contents ...
Page 110: ...105 Service Training SECTION 10 SCHEDULED MAINTENANCE Contents ...
Page 111: ...106 Service Training Lubricants and Service Intervals TX760 TX860 TX860SB Contents ...
Page 113: ...Contents ...
Page 114: ...Contents ...
Page 115: ...Contents ...