Clyde 15F2930-E - User Manual

Clyde Machines, Inc.
1150 North Hwy. 55
P O Box 194
Glenwood, MN 56334
Pho. 320/634-4503
Fax. 320/634-4506
www.clydemachines.com
15F2930-E Towbar
73-8
A319/A320/A321
Maintenance Manual
Property of American Airlines

Summary

15 F2930-E Towbar Maintenance Manual

Company and Product Details

Clyde Machines, Inc. contact information, website, towbar model, and aircraft compatibility.

Revision Log

Records changes made to the manual over time with dates and descriptions.

Warranty Information

Warranty Coverage and Exclusions

Details what the warranty covers and what it excludes, like improper use.

Warranty Claim Procedure

Information required when contacting for warranty service.

Maintenance Procedures and Schedules

Daily Inspection

Visual checks for physical damage and operational functionality of the towbar.

Bi-Yearly Inspection

Lubrication of pivots, checking shear bolts, hydraulic pump, and tire pressure.

Yearly Inspection

Repacking wheel hub bearings with grease.

As Required Maintenance

Guidelines for replacing shear bolts and retention bolts, and torque precautions.

Towbar Damage and Repair

Mounting Hole Repair

Steps to repair damaged mounting holes by shortening the tube and re-drilling.

Tube Integrity Limits

Acceptable limits for bowing, dents, and gouges in the towbar tube.

Placard Identification

Information on the purpose and part numbers of various placards on the towbar.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features
   1. Daily Inspection
   2. Bi-Yearly Inspection
   3. Yearly Inspection
   4. Repair Information

The device described in this manual is the 15F2930-E Towbar, designed for the A319, A320, and A321 aircraft. It is manufactured by Clyde Machines, Inc., located at 1150 North Hwy. 55, PO Box 194, Glenwood, MN 56334.

Function Description

The 15F2930-E Towbar is a ground support equipment used for towing A319, A320, and A321 aircraft. Its primary function is to connect to the aircraft's nose gear towing pin and allow for controlled movement of the aircraft on the ground. The towbar features a head mechanism designed to engage with the aircraft's nose gear, a main tube structure, and an axle lift system with wheels for mobility. It incorporates shear bolts as a safety mechanism, designed to shear at a predetermined load to prevent damage to the aircraft or towbar in case of excessive force during towing.

Important Technical Specifications

• Aircraft Compatibility: A319, A320, A321
• Mounting Holes: The lunette or head mounting holes are Ø.375 (12X) and are torqued to 35 ft-lbs.
• Tube Dimensions (for mounting holes):
  • Center-to-center distance between outer holes: 2.938 inches
  • Center-to-center distance between middle holes: 1.813 inches
  • Center-to-center distance between inner holes: 0.750 inches
  • Overall length for hole pattern: 3.500 inches
  • Angle: 45.0° TYP.
• Tire Pressure: 24 PSI (as indicated on placard 15L18769)
• Shear Bolts:
  • Shear Bolt P/N #1505710 (placard 15L22233)
  • Shear Bolt P/N #1505388 (placard 15L22232)
• Hydraulic System: Utilizes ATF Fluid for the hand pump.
• Grease: Lithium EP2 or equivalent for axle lift pivots and hub bearings.

Usage Features

The towbar is designed for straightforward engagement with the aircraft. The operating instructions, as detailed on placard 15O5878, are as follows:

1. Open the hydraulic valve at the pump and lower the towbar.
2. Remove the ball lock T-pin from the sliding jaw and open the jaw.
3. Position the towbar head onto the nose gear towing pin and lock the sliding jaw.
4. Insert the ball lock T-pin behind the jaw to complete the towbar engagement to the aircraft.

A critical aspect of usage involves the shear bolts. When replacing shear bolts or the retention bolt, it is essential not to overtighten the nuts. The bolts should rotate with very little effort, or the nut is too tight. Over-tightening can cause the bolts to shear at a higher load than desired, potentially compromising the safety mechanism.

Maintenance Features

The manual outlines a clear maintenance schedule to ensure the towbar remains in safe and operational condition.

Daily Inspection

• Visual Check: Inspect the entire towbar for any physical damage. Repair or replace damaged parts as necessary.
• Head Operation: Check the towbar head for proper operation, looking for damaged parts or binding. Readjust or replace as necessary.

Bi-Yearly Inspection

• Shear Bolts: Check shear bolts by turning their heads with a hand wrench. Any binding indicates a partially sheared bolt, which must be replaced.
• Axle Lift Pivots: Grease the axle lift pivots using the provided grease zerks. Use Lithium EP2 or equivalent grease.
• Hydraulic Hand Pump: Check for proper operation and adequate oil level. If oil needs to be added, use ATF Fluid. Ensure the cold 5606 oil is acceptable.
• Tire Pressures: Check tire pressures. The recommended pressure is 24 P.S.I.
• Lunette Ring Cross Section: Check the lunette ring for excessive wear. Measure at the thinnest point; if the ring cross section is less than 1.25 inches, replace it.
• Head Retention Bolt Cushions: If equipped, check the lunette and head retention bolt cushions for cracking. Replace if necessary.

Yearly Inspection

• Wheel Bearings: Remove the wheels and repack the hub bearings with grease. Use Lithium EP2 or equivalent grease.

Repair Information

• Mounting Holes: If the lunette or head mounting holes are damaged, they can be repaired by shortening the tube and re-drilling new holes. This can be done once per each end. Approximately 3.5 inches will need to be cut off to allow for new holes. The mating part should be used as a guide for marking the (12) Ø.375 holes. Torque hardware to 35 ft-lbs.
• Bowing: The tube may not be bowed more than 1/2 inch over its length.
• Dents: Any dent in the aluminum tube must not be deeper than 1/2 inch.
• Gouges: Any gouge in the aluminum tube must not be deeper than 1/8 inch and not longer than 1 inch.
• Tube Replacement: Any tube with damage that exceeds the specified limits for bowing, dents, or gouges must be replaced.

The manual emphasizes that the warranty covers defects caused by faulty material or poor workmanship for one year from the date of shipment, provided the seller is promptly notified. It explicitly states that the warranty does not cover damage from improper use, installation, overloading, accident, neglect, harmful alterations or repairs by others, weather conditions, or acts of God. For warranty claims or technical support, users are advised to contact Clyde Machines, Inc. and provide the Product Model Number, Product Serial Number, and a description of the problem.

Clyde 15F2930-E Specifications

General

Brand	Clyde
Model	15F2930-E
Category	Industrial Equipment
Language	English