1. Instructor: CW2 Scott Paul Rogers
HYDRAULICS
Instructor: CW2 Scott Paul Rogers
DURING THIS BRIEFING YOU WILL LEARN THE MEDICAL SERVICE CORPS’
VISION
HISTORY
FUNCTIONS
AREAS OF CONCENTRATION
SCIENTIFIC ACHIEVMENTS
WE WILL HAVE A QUESTION PERIOD AND I WILL
STATE THE CONCLUSION

2. OUTLINE
Terminal Learning Objective Hydraulic Systems Component and Location Description Leak in No. 1 HYD System Leak in No. 2 HYD System Review Questions
DURING THIS BRIEFING YOU WILL LEARN THE MEDICAL SERVICE CORPS’
VISION
HISTORY
FUNCTIONS
AREAS OF CONCENTRATION
SCIENTIFIC ACHIEVMENTS
WE WILL HAVE A QUESTION PERIOD AND I WILL
STATE THE CONCLUSION

3. TERMINAL LEARNING OBJECTIVE: To develop the student’s understanding
of the components and functions of the Hydraulic System.
TO PROVIDE HIGHLY SKILLED AND DEDICATED LEADERS WHO
PERFORM THE CLINICAL, SCIENTIFIC, ADMINISTRATIVE,
COMMAND AND SUPPORT SERVICES ESSENTIAL TO EFFICIENTLY
AND EFFECTIVELY MANAGE A QUALITY, WORLD CLASS HEALTH
CARE SYSTEM IN SUPPORT OF THE ARMY.

4. HYDRAULIC SYSTEMS Provides 3000 to 3100 + 50 psi Operates
Primary Servos
Tail Rotor Servos
Pilot Assist Servos
APU Start motor

5. COMPONENTS AND LOCATION
MAJOR COMPONENTS
3 Hydraulic Pump Modules 2 Transfer Modules Utility Module Pilot Assist Module 3 Primary Servos
MOST OF THESE COMPONENTS ARE GROUPED TOGETHER ON THE UPPER DECK IN FRONT OF THE TRANSMISSION. THE SERVOS ARE CONNECTED TO THE HYDRAULIC MODULES THROUGH MANIFOLDS AND SELF-SEALING COUPLINGS.
3 Hydraulic Pump Modules
2 Tranfer Modules
Utility Module
Pilot Assist Module
3 Primary Servos
Tail Rotor Servo
4 Pilot Assist Servos
APU Accumulator
APU Handpump
Refill Handpump

6. COMPONENTS AND LOCATION
MAJOR COMPONENTS (cont)
Tail Rotor Servo
4 Pilot Assist Servos
APU Accumulator
APU Handpump
Refill Handpump

7. Three Hydraulic Systems
System Description
Three Hydraulic Systems
No. 1 Hydraulic System
No. 2 Hydraulic System
Backup Hydraulic System
THE HYDRAULIC SYSTEM PROVIDES BETWEEN 3000 TO PSI OF HYDRAULIC PRESSURE TO OPERATE THE PRIMARY SERVOS, TAILROTOR SERVOS, PILOT ASSIST SERVOS AND APU START MOTOR.

12. Resv Level Sensing Switch
Leak in #1 HYD System
Logic module shuts the
NO. 1 TR shutoff valve
at the NO. 1 Transfer Module
and opens the NO. 2 T/R shutoff
valve.
LEAKAGE IN NO. 1
Partial Loss of
NO. 1 Resv Hyd Fluid
Activation of NO. 1
Resv Level Sensing Switch
#1 RSVR
LOW
Turns off NO. 1
Tail Rotor Servo
#1 TAIL RTR
SERVO
BU Pump On
BACK-UP
PUMP ON
Turns On NO. 2
Tail RTR Servo
# 2 TAIL RTR
SERVO ON

13. If No Other Lights
Leak is in NO. 1 Stage Tail Rotor Servo

14. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
BOOST SERVO
OFF
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
TRIM FAIL
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
STABILATOR
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

15. If the Leak continues

16. Leak in #1 HYD System (Cont)
Complete Loss of NO. 1
RSVR HYD fluid
#1 HYD
PUMP
#1 PRI
SERVO PRESS
Backup Pump Supplies
No. 1 PRI SERVO and
NO. 1 TR SERVO
(NO. 1 TR Servo Turned Back On)
BACK-UP
PUMP ON
Logic module turns off 2nd
stage T/R shut off valve, and
opens the NO. 1 T/R shutoff valve
at the NO. 1 Transfer Module

17. If No Other Lights
Leakage is up stream of NO. 1 transfer module

18. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
BOOST SERVO
OFF
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
TRIM FAIL
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
STABILATOR
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

19. If the Leak continues

20. Leak in #1 HYD System (cont) Resv Level Sensing Switch
Partial Loss of
Backup Resv Hyd Fluid
Leakage in 1st Stage PRI
SERVO
Activation of Backup
Resv Level Sensing Switch
BACK-UP
RSVR LOW
PILOT MOVE SERVO
OFF SWITCH
1ST STAGE
NO PILOT ACTION

21. NO PILOT ACTION RESULTING CONDITION Loss of NO. 1 Primary Servo
Loss of NO. 1 and NO. 2 T/R Servo
Back up Pump Runs Dry
BACK-UP
RSVR LOW
#1 PRI
SERVO PRESS
#1 HYD
PUMP
#1 RSVR
LOW
#1 TAIL RTR
SERVO
BACKUP
PUMP INOP

22. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
BOOST SERVO
OFF
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
TRIM FAIL
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
STABILATOR
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

23. PILOT MOVE SERVO OFF SWITCH 1ST STAGE
RESULTING CONDITION
Loss of NO. 1 Primary Servo
BACK-UP
RSVR LOW
#1 PRI
SERVO PRESS
#1 HYD
PUMP
#1 RSVR
LOW
Leak is isolated by the
pilot in the NO. 1 PRI servos
BACK-UP
PUMP ON

24. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
BOOST SERVO
OFF
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
TRIM FAIL
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
STABILATOR
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

25. Resv Level Sensing Switch
Leak in #2 HYD System
Logic module shuts the
Pilot Assist shutoff valve
at the NO. 2 Transfer Module
Increased Pedal and Collective Loads
LEAKAGE IN NO. 2
Partial Loss of
NO. 2 Resv Hyd Fluid
Activation of NO. 2
Resv Level Sensing Switch
#2 RSVR
LOW
Turns off Pilot
Assist Servos
BOOST SERVO
OFF
TRIM FAIL
FLT PATH
STAB
SAS OFF

26. If No Other Lights
Leak is in Pilot Assist Area

27. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
BOOST SERVO
OFF
TRIM FAIL
STABILATOR
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

28. If the Leak continues

29. Leak in #2 HYD System (Cont)
Complete Loss of NO. 2
RSVR HYD fluid
#2 HYD
PUMP
#2 PRI
SERVO PRESS
Logic module opens the
Pilot Assist shutoff valve
at the NO. 2 Transfer Module
Backup pump powers P.A.
BU Pump On
BACK-UP
PUMP ON
Pilot Assist Servos
Turned On
BOOST SERVO
OFF
SAS OFF
TRIM FAIL
FLT PATH
STAB
Power On
Reset Press

30. If there are no other lights
leakage is upstream of the NO. 2 Transfer Module

31. # 1 PRI
SERVO PRESS
#1 HYD
PUMP
#2 HYD
PUMP
# 2 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
IRCM
INOP
# 1 TAIL RTR
SERVO
AUX FUEL
MAIN XMSN
OIL TEMP
INT XMSN
OIL TEMP
TAIL XMSN
OIL TEMP
APU OIL
TEMP HI
BOOST SERVO
OFF
STABILATOR
SAS OFF
TRIM FAIL
LFT PITOT
HEAT
FLT PATH
STAB
RT PITOT
HEAT
IFF
CHIP INPUT
MDL - LH
CHIP
INT XMSN
CHIP
TAIL XMSN
CHIP INPUT
MDL - RH
CHIP ACCESS
MDL - LH
CHIP MAIN
MDL SUMP
APU
FAIL
CHIP ACCESS
MDL - RH
MR DE-ICE
FAIL
MR DE-ICE
FAULT
TR DE-ICE
FAIL
ICE
DETECTED
MAIN XMSN
OIL PRESS
#1 RSVR
LOW
#2 RSVR
LOW
BACK-UP
RSVR LOW
#1 ENG
ANTI-ICE ON
#1 ENG INLET
ANTI-ICE ON
#2 ENG INLET
ANTI-ICE ON
#2 ENG
ANTI-ICE ON
PRIME BOOST
PUMP ON
BACK-UP
PUMP ON
APU ON
APU GEN ON
APU ACCUM
LOW
SEARCH LT ON
#2 TAIL RTR
SERVO ON
LDG LT ON

32. Leak in #2 HYD System (cont) Resv Level Sensing Switch
Partial Loss of
Backup Resv Hyd Fluid
Leakage in 2nd Stage PRI
SERVO
Activation of Backup
Resv Level Sensing Switch
BACK-UP
RSVR LOW
PILOT MOVE SERVO
OFF SWITCH
1ST STAGE
NO PILOT ACTION

33. NO PILOT ACTION RESULTING CONDITION Loss of NO. 2 Primary Servo
Loss of NO. Pilot Assist Servos
BACKUP PUMP
INOP
BACK-UP
RSVR LOW
#2 PRI
SERVO PRESS
#2 HYD
PUMP
#2 RSVR
LOW
SAS OFF
TRIM FAIL
BOOST SERVO
OFF
FLT PATH
STAB

34. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
BOOST SERVO
OFF
TRIM FAIL
STABILATOR
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

35. PILOT MOVE SERVO OFF SWITCH 2ND STAGE
RESULTING CONDITION
Loss of NO. 2 Primary Servo
Pilot Assist Servo Pressure Supplied by the Backup Pump
BACK-UP
RSVR LOW
#2 PRI
SERVO PRESS
#2 HYD
PUMP
#2 RSVR
LOW
BACK-UP
PUMP ON

36. # 1 PRI
SERVO PRESS
TAIL ROTOR
QUADRANT
MAIN XMSN
OIL TEMP
LFT PITOT
HEAT
CHIP INPUT
MDL - LH
CHIP ACCESS
MR DE-ICE
FAIL
OIL PRESS
#1 ENG
ANTI-ICE ON
APU ON
APU ACCUM
LOW
# 2 PRI
# 1 TAIL RTR
SERVO
APU OIL
TEMP HI
RT PITOT
MDL - RH
ICE
DETECTED
BACK-UP
RSVR LOW
#2 ENG
PUMP ON
#2 TAIL RTR
SERVO ON
#1 HYD
PUMP
IRCM
INOP
INT XMSN
FLT PATH
STAB
CHIP
CHIP MAIN
MDL SUMP
FAULT
#1 RSVR
#1 ENG INLET
APU GEN ON
SEARCH LT ON
#2 HYD
AUX FUEL
TAIL XMSN
BOOST SERVO
OFF
TRIM FAIL
STABILATOR
SAS OFF
IFF
APU
TR DE-ICE
#2 RSVR
#2 ENG INLET
PRIME BOOST
LDG LT ON

37. Review Hydraulic Systems Component and Location Description
Leak in No. 1 HYD System
Leak in No. 2 HYD System
DURING THIS BRIEFING YOU WILL LEARN THE MEDICAL SERVICE CORPS’
VISION
HISTORY
FUNCTIONS
AREAS OF CONCENTRATION
SCIENTIFIC ACHIEVMENTS
WE WILL HAVE A QUESTION PERIOD AND I WILL
STATE THE CONCLUSION

38. CONCLUSION UH-60 HYDRAULICS LEAK ISOLATION
L.D.I. -- Isolates leaks in #1 T/R servo and Pilot Assist Area
T.V. -- Isolates a leaking Hydraulic Pump
Pilot -- Isolates leaks in primary servos

39. QUESTIONS ?

40. Short Quiz UH-60 HYDRAULICS LEAK ISOLATION
What isolates leaks in #1 T/R servo and Pilot Assist Area?
What isolates a leaking Hydraulic Pump?
What isolates leaks in primary servos?