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AE246 - 1

AE246 High pressure PTFE Hose and "super gem" Reusable fittings Assembly and disassembly instructions for hand and machine assembly Powering Business Worldwide

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AE246 - 2

EATON Aerospace Group TF100-63C December 2023

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AE246 - 3

EATON Aerospace Group TF100-63C December 2023 iii

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AE246 - 4

Section 1: Introduction 1. Purpose This manual provides specific instructions for maintenance and overhaul of Eaton’s Aeroquip hose assemblies made of high-pressure poly tetrafluoroethylene (PTFE) hose. Eaton’s Jackson, Michigan facility manufactures Aeroquip products (Federal Code Number 00624). The manual is divided into three areas of maintenance to enable each maintenance group to complete its service within a sequence of sections. The first area, following “Introduction” and “Identification” which are common to all levels, contains the maintenance and overhaul procedures for hose...

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AE246 - 5

Section 2: Identification 1. Identification and construction of AE246 high pressure PTFE hose A. AE246 PTFE hose (Figure 1) conforming to the requirements of MIL -H-38360 and AS1339 has a corrosion resistant steel wire braid reinforcement covering an extruded PTFE inner tube. See Table 1. 3. Fittings All component parts of fittings are impression-stamped with the part number. B. Identification of AE246 PTFE hose 1. Bulk hose Identification — Bulk hose has a tape with black letters specifying Aeroquip hose – size, operating pressure, lot number and hose manufacturer’s code. Tape is located...

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AE246 - 6

4. Hose assemblies All factory assembled hose assemblies are identified with a metal band (Figure 5) containing part numbers, date of assembly, etc. A detailed explanation of the different elements of a hose assembly part number is shown in Figure 6. How to complete assembly part number Basic types of hose assembly numbers are shown below. A detailed explanation of the different elements of the part numbers are given on these pages. AE2460500 E 0184 -► Complete assembly number (hose assembly with straight fittings or elbow on one end only) E 0184 225 -► Complete assembly number (hose...

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AE246 - 7

Position angle (Angle of rotation) For assemblies with an elbow fitting on each end, measure the position angle as shown and suffix the angle to the basic style number. The angle is expressed in three digits. For example: 35° would be written as 035. If the angle desired is 0°, specify as 000. The angle shown in the example is 225°. Adjustable elbow fittings are easily positioned through 360° to the desired relative angle between opposite elbow fittings. Mock-up and prototype installation changes are simplified as the position angle can be determined on the actual installation. Assembly...

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AE246 - 8

Section 3: Disassembly 1. Complete assembly tear-down Procedure for salvage of hose assembly components: Step 1. Fire-sleeved hose assemblies only). Remove band ( clamps by cutting clamp “buckles” with hack saw. Remove fire sleeve from hose assembly. (See Figure 7.) Step 2. Place socket in vise and remove nipple assembly by applying wrench to nipple hex. (See Figure 8.) Step 3. Cut hose approximately 1-inch from socket skirt. Step 4. Hold socket firmly in vise. Do not damage socket. Using needle nose pliers, remove the tube from the sleeve and hose reinforcement. (See Figure 8A). The tube...

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AE246 - 9

Section 4: Cleaning 1. General It is recommended that all hose assemblies and component parts be thoroughly cleaned and degreased before inspection. A. Cleaning Hose Assemblies with AE102/624 Fire Sleeve — It is suggested that the fire sleeve be completely removed before cleaning. When cleaning after proof test, installation of a new fire sleeve should be the last operation performed. B. Cleaning Hose Assemblies without Fire Sleeve — Flush hose assembly in cleaning fluid and brush, if necessary, to dislodge deposits. (For information covering F-2244 Hose Wash Stand, contact Eaton's...

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AE246 - 10

Section 5: Repair and replacement 1. General Fittings with minor damage may be repaired and reused as follows: A. Hose Assemblies — All hose assemblies with damaged hose shall have end fittings removed and salvaged and the hose scrapped. B. Fittings (Nipple, Sleeve and Socket) — 1. General — Replace all scrapped components. 2. Damaged swivel nuts may be replaced as follows: a. Cut nut down to retaining wire as shown in Figure 9. b. Remove metal shavings and clean fitting. c. Install new nut and drive in new retaining wire (Figure 10). d. Set retaining wire with a punch (Figure 11). Note: If...

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AE246 - 11

Section 6: Assembly procedure — hand tool method 1. General The following steps should be followed when fabricating hose assemblies from new or salvaged components: Note: Assembly mandrels are not needed for assembly of fittings using hand tool method. A CAUTION Do not salvage used hose or used fire sleeve. Used fire sleeve is defined as sleeve removal from hose assembly. Used hose is defined as hose which has been removed from an installation and returned for replacement. A. Straight swivel fittings — Step 1. Cut hose. Determine hose cut-off length by subtracting cut-off factors from Table...

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AE246 - 12

Section 6: Assembly procedure — hand tool method Step 2. nstall sockets (size -4 through size -10). Place two I sockets skirt-to-skirt in vise (see Figure 13), and work hose through sockets with a twisting pushing motion. Installing sockets over “neckdown” end of hose will facilitate assembly. (Size -12 only) — Assemble sockets from each end of hose. Note: If tape was left in place to ease socket assembly, it must be removed before additional steps are performed. Step 3. ize tube and flare braid. Place nipple hex in vise. S Push end of hose onto the nipple and work gently to aid in...

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AE246 - 13

Section 6: Assembly procedure — hand tool method Step 5. ize tube to sleeve. Size tube to sleeve by pushing S hose onto the nipple until the sleeve bottoms against the nipple chamfer. Remove and recheck to be certain that the sleeve is still properly positioned. Again push hose onto the nipple until the sleeve is bottomed against the nipple chamfer. (See Figure 16.) Note: Note: When assembling new fittings no lubrication is needed as component parts are dryfilm lubricated at the time of manufacture. After reuse of the fitting, if undue wearing of the dryfilm or bare metal is observed, the...

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