Fleet and Heavy Duty N... · Cummins N14 Belts Freightliner advised that the fan drive belts on Cummins N14 engines in FLA, FLB, FLD and Century trucks sometimes can roll over, fail

January 2005

Form No. 433-0787

Proper alignment, Gates Green Stripe PowerBand belt maySolve Cummins N14 engine drive system problems

The fan drive belts on the Cummins N14

engine are known to occasionally turn over,

fail to run true in the pulley groove, or flip out

of the groove altogether. This is an indication that the fan hub and the pulley grooves are

misaligned. (See photo below.)

The problem has been widely reported in

Cummins and

Freightliner

servicebulletins, and

even in a

“Tech Update”

article printed in Truck Parts & Servicemagazine.

(See attachments.)

Despite improvements by Cummins to

alleviate the problem, fan drive belts may still

fail prematurely.

For belt drive systems with persistent failures,

Gates Corporation

engineers recommend that

technicians first realign the

pulleys with a straight edge.

To check parallel alignment, line a straight edge (metal

bar or ruler) along the

outside face of both pulleys.

Parallel misalignment will

show up as a gap between

an outside pulley face and the straight edge. (See

illustration, left.)

Tilting “angular” alignment

can be measured with a

spirit level.

If the two individual drive

belts continue to come off the drive or turn

over, Gates recommends replacing them with

a Gates Green Stripe® PowerBand

® belt.

The belt is made by joining two or more Gates premium V-belts with a permanent,

high strength tie band. It bends over pulleys

as easily as multiple V-belts, but the tie band

increases stability to keep the belt from

turning over or coming off the drive.

Gates PowerBand belt will also solve problems on high load, high horsepower

drives that abruptly start and stop, adding

stress and heavy vibrations to the drive.

Also, the joined belt cuts installation costs,

reduces inventory by eliminating the need for

matched V-belts, and has twice the service life of single sets of belts.

Gates Green Stripe PowerBand is made with

a thinner profile and variable notching pattern

for cooler, quieter operation, and less

cracking.

In testing by Gates engineers, Green Stripe PowerBand belts provided nearly twice the service life of conventional V-belt sets.Not all pulleys are designed for Green Stripe

PowerBand belts.

(MORE)

Fleet and Heavy Duty

Gates Fleet & Heavy Duty TECHTIPS

Cummins N14 Engine

Page 2

To check for compatibility and pulley groove

spacing, maintenance technicians should ask

their Gates heavy-duty parts distributor for a

free set of Green Stripe PowerBand pulley

templates (Part Number 431-2036).

Instructions are included with each set ofplastic templates.

When ordering Gates replacement belts, refer

to TABLE 1 on this page.

Also, refer to the attached listing of more than

200 engine applications showing makes and

models, and the OEM part numbers with the corresponding part numbers for Gates Green

Stripe PowerBand replacement belts.

TABLE 1Equipment Make OEM Part No. Gates Part No. Freightliner 0127191000 2/TR28466PB Freightliner 2310001029 2/TR28501PB Freightliner 2310001030 2/TR28492PB Freightliner 2310001031 2/TR28473PB Freightliner 2310001044 2/TR28480PB Freightliner 2310001056 2/TR28437PB International/Navistar 479329C1 2/TR28510PB International/Navistar 488674C1 2/TR28492PB International/Navistar 543042C1 2/TR28480PB International/Navistar 1686803C1 2/TR28473PB International/Navistar 488674C91 2/TR28492PB Kenworth 28430 2/TR28429PB Kenworth 134809 2/TR28492PB Kenworth 178597 2/TR28501PB Mack 134809 2/TR28492PB Mack 178624 2/TR28473PB Peterbilt 134809 2/TR28492PB White GMC 8003118 2/TR28483PB

Gates Corporation,

PO Box 5887

Denver, Colorado www.gates.com/fleet

Cummins N14 Belts

Freightliner advised that the fan drive belts on Cummins N14 engines in FLA, FLB, FLD and

Century trucks sometimes can roll over, fail to run true in the groove or come off the pulleys

completely.

This may indicate the fan hub bracket mounting location has caused a misalignment between the

upper fan hub pulley and the drive pulley.

This problem has persisted in a few cases, despite improvements implemented by Cummins. The

following procedures can be used to realign the pulleys and replace the belts, if

needed.

��Position the vehicle on a level surface, shut down the engine, set the

parking brake and chock the front and rear tires so the vehicle cannot

move.

��Tilt the cab or open the hood.

��Inspect the alignment of the fan hub pulley with the drive pulley. Correct

alignment must be checked visually. (See figure to the right.) In some

installations, a straight edge can be used to check pulley alignment. The

maximum permissible misalignment is 0.0625” per foot.

If the pulleys are not aligned properly, continue with the following steps.

��Loosen the fan hub-mounting bracket cap screws enough to allow the

bracket to be moved either forward or backward.

��Move the fan hub-mounting bracket to align it with the drive pulley within the specified

distance.

��Tighten the lower cap screws to 75 lb. ft. (102 N m) and the upper cap screws to 50 lb. (68

N m).

��Tension the belts to 100 lb.

��Visually confirm that the pulleys still are aligned.

��Rotate the engine and check belt alignment again.

If the belts continue to come off the fan drive pulleys or fail to run true to the groove after

checking and adjusting the alignment, change the two belts to a Gates PowerBand�

belt. This

double V-Belt is available in several lengths to fit most Cummins N14 engines.

Truck Parts & Service “Tech Update” is reprinted with permission of Kona Communications, Deerfield, Il.Copyright 2003. All rights reserved.

Gates PowerBand Belts for Cummins N14 Applications

Equipment Make Equipment Model Equipment Year Application Description OEM Part Number

Gates PowerBand Part

Number

Freightliner Century Class 2001 Hub & Fan 2/TR28411PB






Freightliner Classic 2002 Fan 0127191000 2/TR28466PB

Freightliner FLA 1993 Fan 2310001054 2/TR28429PB





Freightliner FLA 1993 Alt. 2310001029 2/TR28501PB






Freightliner FLA 1992 Alt. 2310001029 2/TR28501PB

Freightliner FLB 1998 Fan 2/TR28411PB

Freightliner FLB 1997 Fan 2/TR28411PB

Freightliner FLB 1996 Fan 2310001054 2/TR28429PB





Freightliner FLB 1996 Alt. 2310001029 2/TR28501PB













Freightliner FLC 1997 Fan 2/TR28411PB

Freightliner FLC 1996 Fan 2310001054 2/TR28429PB





Freightliner FLC 1996 Alt. 2310001029 2/TR28501PB




















Page 1




Number






Freightliner FLD 2002 Fan 0127191000 2/TR28466PB






Freightliner FLD 1996 Alt. 2310001029 2/TR28501PB

























International/Navistar 2500 1994 Fan 479329C1 2/TR28510PB








International/Navistar 5000 Series 1993 Fan 488674C1 2/TR28492PB

International/Navistar 5000 Series 1992 Fan 488674C1 2/TR28492PB

International/Navistar 8100 1999 Fan 1686803 2/TR28473PB

International/Navistar 8100 1998 Fan 1686803 2/TR28473PB

International/Navistar 8100 1997 Fan 2/TR28473PB



International/Navistar 8200 1997 Fan 2/TR28473PB














Page 2




Number








International/Navistar Paystar 1993 Fan 488674C1 2/TR28492PB

International/Navistar Paystar 1992 Fan 488674C1 2/TR28492PB

Kenworth K100 1993 Fan 2/TR28400PB

Kenworth K100 1993 Fan 134809 2/TR28492PB


Kenworth K100 1992 Fan 2/TR28400PB



Kenworth T2000 2000 Hub & Fan 2/TR28411PB




Kenworth T600 1996 Fan 2/TR28411PB

Kenworth T600 1996 Fan 28430 2/TR28429PB





























Kenworth W900 1996 Fan 2/TR28480PB








Mack R Series 1993 Fan 178624 2/TR28473PB




Mack RW Series 1993 Fan 178624 2/TR28473PB




Page 3




Number

Peterbilt 357 1997 Fan 2/TR28480PB





Peterbilt 362 1996 Fan 134809 2/TR28492PB

































Peterbilt 379 1997 Hub & Fan 2/TR28483PB









White GMC WG Series 1994 Fan 8003118 2/TR28483PB

White GMC WG Series 1993 Fan 8003118 2/TR28483PB

White GMC WIA Series 1995 Fan 8003118 2/TR28483PB




White GMC WIL Series 1994 Fan 8003118 2/TR28483PB

White GMC WIM Series 1994 Fan 8003118 2/TR28483PB



Per KB 12-20-04

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Fleet and Heavy Duty N... · Cummins N14 Belts Freightliner advised that the fan drive belts on Cummins N14 engines in FLA, FLB, FLD and Century trucks sometimes can roll over, fail

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