H Y D R A U L I C P R E S S U R E I N D I C A T I N G S Y S T E M O P E R A T I O N A L C H E CK\

HYDRAULIC PRESSURE INDICATING SYSTEM VISUAL CHECK

HYDRAULICS PRESS lND CIRCUIT BREAKER DOES NOT STAY CLOSED

TM-55-1520-240-T-2 CH-47D Heilcopter Manual
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TM 55-1520-240-T 8 - 7 . 3 H Y D R A U L I C P R E S S U R E I N D I C A T I N G S Y S T E M O P E R A T I O N A L C H E CK 8 - 7 . 3 INITIAL SETUP Applicable Configurations: All Tools: None Materials: None Personnel Required: Medium Helicopter Repairer References: TM 55-1520-240-23 Equipment Condition: TM 55-1520-240-23: Battery Connected Electrical Power On Hydraulic Power On Hydraulic Pressure Indicating System Visual Check Performed (Task 8-7.2) TASK RESULT Check that HYDRAULICS PRESS IND circuit breaker (1) is closed. Check UTILITY HYDRAULICS PRESSURE indi- cator (2). If circuit breaker (1) is open, close it. If it opens again, go to task 8-7.4. Indicator (2) shall indicate 2500 to 3500 psi and pointer shall not fluctuate more than 100 psi. If indi- 1. 2. 3. 4. 5. 6. cator does not indicate 2500 to 3500 psi or if pointer fluctuates more than 100 psi, go to task 8-7.5. If it is not, set switch (3) to BOTH. Indicator (5) shall indicate 2500 to 3200 psi and pointer shall not fluctuate more than 100 psi. If indi- cator does not indicate 2500 to 3200 psi or if pointer fluctuates more than 100psi, go to task 8-7.6. Check that FLT CONTR switch (3) is at BOTH. Set POWER XFR No. 1 switch (4) to ON. Check HYDRAULICS FLT CONT NO. 1 PRES- SURE indicator (5). Set POWER XFR No. 1 switch (4) to OFF. Set POWER XFR No. 2 switch (6) to ON. Indicator (7) shall indicate 2500 to 3200 psi and pointer shall not fluctuate more than 100psi. If indi- cator does not indicate 2500 to 3200 psi or if pointer fluctuates more than 100 psi, go to task 8-7.7. Set POWER XFR No. 2 switch (6) to OFF. 7. FOLLOW-ON MAINTENANCE: TM 55-1520-240-23: Battery Disconnected Electrical Power Off Hydraulic Power Off E N D O F T A S K 8-124 Change 13

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