Regulator Rebuild Instructions; Major Disassembly - Ametek CHANDLER ENGINEERING 5265 Instruction Manual

3-2 SECTION 3 – MAINTENANCE
1. Remove the cell from the instrument.
2. Thoroughly clean the cell in preparation for calibration.
3. Unscrew the bottom plug until the threads are approximately 1/2 engaged.
4. Insert the foam-centering sleeve for the calibration bar.
5. Apply a small amount of acoustic couplant to the ends of the 3.5-inch
calibration bar.
6. Insert the calibration bar into the cylinder and press against the bottom plug.
7. Screw the top plug into the cylinder until it engages the calibration bar. Hand-
tighten only.
8. Install the cylinder assembly into the instrument. Connect the top and bottom
transducer cables.
9. Using the Data Acquisition Software, enter the UCA calibration section and
update the calibration values. The specifics related to calibrating using the
software may be found in the Model 5270 software manual.

Regulator Rebuild Instructions

Repair Kit Required: Chandler Part Number C09987 ( Refer to the figure at the
end of this section.)
Tools required:
5/16" Wide Screwdriver
1/2" Wide Screwdriver
1/2" Socket Wrench
1/2" Open End Wrench or Small Adjustable Wrench
1-3/4" Open End Wrench or Large Adjustable Wrench
Needle Nose Pliers
The regulator is readily disassembled from the front panel.
Note: All disassembly can be done WITHOUT removing the regulator from the
instrument.

Major Disassembly

1. Ensure all pressure is released from the instrument.
2. Rotate the regulator knob (Item 159) fully counterclockwise to remove tension
from the regulator assembly.
3. Remove the hole plug (Item 155) from the regulator knob using the narrow
(5/16" wide screwdriver) to pry the hole plug free.
4. Unscrew the nut (Item 153) from inside the regulator knob cavity using the
1/2" socket wrench.
5. Unscrew the bonnet (Item 151) using the 1-3/4" open end wrench. The
bonnet will come off as an assembly: Bonnet (Item 151), adjusting screw
(Item 160), collar (Item 002), limit screw (Item 158) and load spring (Item
006).
6. Items 161 and 162 do not exist in the stainless steel design. The bonnet (Item
151) is a closed end component as shown in detail (A).
7. Remove the sensor assembly from the body (Item 001) using the needle nose
pliers to grip and pull the sensor from the regulator body. A rocking motion
may be required to free the sensor assembly.