sb2059

Replacing Push-to-Connect Air Line Fittings with Brass
Compression Fittings
FLA COE
FLB COE
> FLD Conventional
Business Class
FLC 112 Conventional
> Century Class Conventional
> Argosy COE
Cargo
20-59
Freightliner
Service Bulletin
> Columbia
> Coronado
> Business Class M2
> Cascadia
General Information
The standard push-to-connect air line fitting for the engine fan control on some vehicles may develop a leak due
to high temperatures and vibration beyond its design limit. If this is the case, replace it with a brass compression fitting on an as-needed basis. See Fig. 1 and Fig. 2.
2
2
1
1
3
04/21/2008
3
f200715
1. Air Line
2. Push-to-Connect Fitting
3. Fan Clutch
04/21/2008
f200716
1. Air Line
2. Brass Compression Fitting
3. Fan Clutch
Fig. 1, Existing Fan Clutch Air-Line Fitting
Fig. 2, New Fan Clutch Air-Line Fitting
Use the parts and the procedure in this bulletin.
Parts
Parts are available from the PDCs.
Part Number
210501 000001
Parts Required
Description
Connector, Female, 1/4-Inch
Qty.
1
Table 1, Parts Required
Procedure
1. Shut down the engine, apply the parking brakes, and chock the tires.
2. Disconnect the batteries at the negative terminals.
3. As applicable, open the hood or tilt the cab. For complete information and warnings on cab tilting, see the
Argosy Driver’s Manual.
4. Drain the air system. The air line cannot be easily removed from the push-to-connect fitting if air pressure is
in the system.
Freightliner Service Bulletin, June 2008
Page 1
20-59
Freightliner
Service Bulletin
Replacing Push-to-Connect Air Line Fittings with Brass
Compression Fittings
FLA COE
FLB COE
> FLD Conventional
Business Class
FLC 112 Conventional
> Century Class Conventional
> Argosy COE
Cargo
> Columbia
> Coronado
> Business Class M2
> Cascadia
5. To remove the air line, push the air line into the fitting, push the release collar against the fitting body, then
pull the air line out of the fitting.
6. Remove the brass fitting from the standpipe on top of the fan clutch.
7. Apply red Loctite®, or equivalent, to the threads of the new fitting, then install it on the standpipe on top of
the fan clutch. Tighten the fitting firmly.
8. If needed, cut the end of the nylon tubing smooth and square.
9. Put the hexnut, then the sleeve from the new fitting over the air line.
10. Insert the squared end of the tubing in the new fitting until it bottoms in the body of the fitting.
11. Slide the sleeve down the air line so it is inside the fitting, then tighten the hexnut finger-tight.
12. Using two wrenches to prevent twisting of the air line, tighten the nut a minimum of two turns, or until one
thread is showing on the body of the fitting.
13. Connect the batteries.
14. Start the engine, let the pressure build to 110 psi (758 kP), then check for leaks.
NOTE: If equipped with a fan override switch, use it to cycle the fan on to check for leaks; otherwise,
let the engine idle until the fan cycles on.
15. Close the hood, or lower the cab, as applicable. For complete information and warnings on cab tilting, see
the Argosy Driver’s Manual.
Warranty
Normal warranty applies. See Table 2 for damage code and labor allowance information, and refer to this bulletin by number in the story of the claim.
VMRS CK18
VMRS CK33
12
042-003-062
Damage Code and Labor Allowance
Damage Code
SRT Code
Description
Replace Push-to-Connect Air Line Fitting
273-002902130
27F-5005A
with Brass Compression Fitting
Time: hours
0.3
Table 2, Damage Code and Labor Allowance
Page 2
Freightliner Service Bulletin, June 2008