FLUID QUANTITY TRANSMITTER - REMOVAL/INSTALLATION
1. General
A. The fluid quantity transmitter is installed in the side of the system A hydraulic reservoir (Fig. 401). When removing the transmitter, take precaution to prevent spilling hydraulic fluid. Should fluid spill on the airplane, the affected area must be decontaminated (Ref Chapter 12, Cleaning and Washing).
2. Remove Fluid Quantity Transmitter
A. Depressurize hydraulic reservoir system (Ref 29-09-300 MP).
B. Open drain valve and drain system A reservoir. Leave drain valve open.
WARNING: DO NOT CLOSE DRAIN VALVE UNTIL TRANSMITTER HAS BEEN REINSTALLED. IF DRAIN VALVE IS CLOSED, FLUID MAY ACCUMULATE IN RESERVOIR AND SPILL ONTO PERSONNEL WHEN TRANSMITTER IS REMOVED.
C. Open SYSTEM A QUANTITY INDICATION circuit breaker on P6 load control panel.
D. Remove transmitter electrical connector (Fig. 401).
E. Remove transmitter mounting bolts.
F. Slowly remove transmitter from reservoir and carefully pull arm and float through reservoir opening.
3. Install Fluid Quantity Transmitter
A. Ensure that mounting surfaces on reservoir flange and transmitter are clean and free of nicks (Fig. 401).
B. Install O-ring on transmitter flange.
C. Carefully insert transmitter arm into reservoir opening.
D. Position transmitter in mounting position and secure with mounting bolts.
E. Install transmitter electrical connector.
E-1. Close drain valve and lockwire.
F. Connect external electric power to airplane.
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Fluid Quantity Transmitter Installation 500
29-33-11 Figure 401 Nov 15/67
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G. Close SYSTEM A QUANTITY INDICATION circuit breaker on P6 load control panel.
H. Check indicator for zero reading.
I. Service hydraulic reservoirs (Ref Chapter 12, Servicing).
J. Pressurize hydraulic reservoir system (Ref 29-09-300 MP).
K. Check for leaks.
L. Check quantity indicators for full indication as follows:
(1)
Hydraulic system A indicator should read F (full) +0.25 gallon.
(2)
Hydraulic system B indicator should read F (full) +0.10 gallon.
(3)
Standby hydraulic system indicator should read F (full) +0.05 gallon.
M. Remove electrical power from airplane.
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FLUID QUANTITY TRANSMITTER - INSPECTION CHECK
1. General
A. The fluid quantity transmitter is installed in the side of the system A reservoir and transmits signals to an indicator on the first officer's panel. A direct reading gage in the level transmitter provides an indication at the reservoir.
2. Check Fluid Quantity Transmitter
A. Remove fluid quantity transmitter (Ref 29-33-11 R/I).
B. Check mechanical linkage of float assembly for signs of wear at pivot points, and for smooth operation through full travel.
C. Install transmitter (Ref 29-33-11 R/I).
NOTE: Do not fill reservoir with hydraulic fluid.
D. Connect electrical power to airplane and close SYSTEM A QUANTITY INDICATION circuit breaker on P6 load control panel.
E. Check indicators for zero readings.
F. Fill reservoir system with hydraulic fluid (Ref (12-12-0).
G. Check indicators for F (full) indication as follows:
(1)
Hydraulic system A indicator should read F (full) + 0.25 gallon.
(2)
Hydraulic system B indicator should read F (full) + 0.10 gallon.
(3)
Standby hydraulic system indicator should read F (full) + 0.05 gallon.
H. If indicator does not read full, remove transmitter and replace.
I. If indicator reads zero, refer to 29-33-0 TS.
J. Pressurize hydraulic reservoir system and check for leaks (Ref 29-09-300 MP).
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