CFM56-7_Road_Transportation.pdf

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3 - Road Transportation Specifications

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3 - Road Transportation Specifications

Roads and Highways transportation has to be compliant with the following:

• General requirements

• Vehicle suspension requirements

• Engine Cradle requirements

• Shipping stand base tiedown requirements

These requirements are detailed in the next pages.

All these requirements prevent damage to the engine due to shock and vibration loads during transportation.

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General requirements:

• Engine must be installed on a shipping stand (Cradle and Base)

• The « engine and shipping stand » assembly may be shipped in a Tractor and trailer truck, or a wagon-bed truck

• The « engine and shipping stand » assembly must be installed lengthwise and must not protrude from the vehicle bed

• Caster wheels and tow bars must be locked in storage position

• Engine must be protected against environment

3 - Road Transportation Specifications

Tractor and trailer truck Wagon-bed truck Shipping stand installed lengthwise and not protruding

Truck Trailer Engine on Shipping

Stand

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Vehicle Suspension requirements:

• Must ensure a natural frequency range filtration from 7 to 10 Hz of the “engine and shipping stand” assembly

• Highly recommended suspensions type:

– “Air ride” (Pneumatic)

– “Hydraulic with Nitrogen Accumulators” (Hydropneumatic)

• Vehicle restrictions depending on suspensions type used:

– Pneumatic: no restriction

– Hydropneumatic: Maximum speed limit is 25mph (40km/h)

• Suspensions disposition on vehicle:

– 1 engine shipped on a trailer: trailer axles must be pneumatically suspended

– 2 or more engines shipped on a trailer: all axles must be pneumatically suspended

– 1 or more engines shipped on a wagon-bed truck: all axles must be pneumatically suspended

Gas accumulator example of an « Air ride » (pneumatic) suspension

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Engine Cradle requirements:

• Engine must be installed and secured on the cradle

• The cradle must be installed on the stand base via shock absorbers

• The cradle must be free of any attaching device to keep full efficiency of shock absorbers:

– “Air Only” tiedown points must not be used

– No strap (or chain) installed over the cradle

– Cover installed on the engine must not be tied down to the truck bed or the base of the Shipping Stand

– Shock absorbers must be free to move

• Clearance between engine cradle and trailer bed:

– Minimum clearance: 2 in. (51 mm) to avoid cradle to trailer bed contact during shock absorbers run

– If necessary, Wooden shims may be put in place between Stand Base and trailer bed Wooden shims between

Stand Base and Trailer bed

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Shipping Stand Base tiedown requirements (1/5):

• Shipping Stand configuration:

– Only the Base of the shipping stand must be attached to the trailer

– Cradle and engine must not be attached neither to the trailer nor to the Base

• Shipping Stand Base features to be used for attachment to the trailer:

– « Air & Truck » Tiedown points

– Forklift tunnels (Alternative only)

• Shipping stand base must be attached to the trailer using 1 of the 2 following devices only:

– Straps attached to « Air & Truck » Tiedown points.

– Note: Use of chains within « Air & Truck » Tiedown points can cause damage to the shipping stand

– Chains installed through Forklift tunnels (Alternative Only)

Engine and Cradle must stay free of attaching device.

Only the Stand Base must be attached to the trailer.

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Shipping Stand Base tiedown requirements (2/5):

• Recommended methods: Straps attached to « Air & Truck » Tiedown points (See Methods 1 & 2):

– Use 4 straps as a minimum. Whenever possible, the use of 6, 8 or 10 straps is recommended.

– Attach straps to « Air & Truck » tiedown points on Stand Base

– Pull them diagonally accross the trailer bed

– Secure straps to the anchoring points on the trailer bed

• Alternative method: Chains installed through Forklift tunnels (See Method 3):

– Only to be used if Recommended methods (Methods 1 & 2) are not applicable

– Pull chains through forward and afterward Forklift tunnels of the Stand Base

– Secure chains to the anchoring points on the trailer bed

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Shipping Stand Base tiedown requirements (3/5):

Method 1 (Recommended): 8 to 10 straps attached to

« Air & Truck » tiedown points

ENGINE CRADLE

(FREE OF STRAP)

STAND

BASE

« Air only » tiedown points (On engine cradle only)

FORBIDEN

TRAILER

BED

8 to 10 straps attached to « Air & Truck » Tiedown points

FWD

CFM best recommended method.

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Shipping Stand Base tiedown requirements (4/5):

Method 2 (Recommended): 4 to 6 straps attached to

« Air & Truck » tiedown points

ENGINE CRADLE

(FREE OF STRAP)

STAND

BASE

« Air only » tiedown points (On engine cradle only)

FORBIDEN

TRAILER

BED

4 to 6 straps attached to « Air & Truck » Tiedown points

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Shipping Stand Base tiedown requirements (5/5):

Method 3 (Alternative, when Methods 1 and 2 are not possible):

Chains installed through Forklift Tunnels

ENGINE CRADLE

(FREE OF CHAIN)

STAND

BASE

« Air only » tiedown points (On engine cradle only)

FORBIDEN

TRAILER

BED

Chains installed through Forklift Tunnels

When possible, apply Methods 1 or 2.