Model: 01-1202-0000
Multi-Head Towbar
11/2006
−
Rev. 17
- 3 -
3.3
USAGE PROCEDURE (continued)
3.3.3
Couplers
CAUTION!
Damage to the towbar or aircraft can result while towing with the following types of couplers:
•
Lift Head
••••
Vertical Side Swing Latch
•
Standard Duty Latch
••••
Swivel Hook
The couplers listed above are known to cause
binding and failure in the lunette eye. Indicators
of binding are wear on outside diameter of the
eyebolt and indentation on the inside diameter
of the eyebolt. Reference Figure 2.
Tronair recommends a telecoupler pintle hook
arrangement. This arrangement is known to
eliminate binding. Tronair offers a Standard
Telecoupler, Model Number 01-1950-5000, for
use on tugs. Reference Figure 3.
Damage to the towbar and/or aircraft can result by towing or pushing an aircraft with an
incorrect size eyebolt or pintle pin. A correct size eyebolt will make contact with the pintle pin.
A gap between the eyebolt outside diameter and the coupler face plate should be easily
seen. An eyebolt which is too large will cause the eyebolt to make contact with the face plate
of the coupler. When the eyebolt is too large for the coupler, a gap between the inside
diameter of the eyebolt and the coupler face plate will be seen. Reference Figure 4.
To ensure proper towing and pushing, check to make sure the pintle pin diameter is not too
long for the eyebolt’s inside diameter. An approximate one-half inch (½") gap between the pin
diameter and the eyebolt should be seen. If any of these conditions are not met, please
contact Tronair for information to obtain a new coupler.
3.3 Usage Procedure continued on following page.
FIGURE 4
FIGURE 3
01-1950-5000 Standard Telecoupler
FIGURE 2
