FSB-221-009

Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
This Field Service Bulletin replaces bulletin, "Hose, Engine Oil
Fill Tube", PV729-FSB221-009_M (USA57868) dated (02/2013).
Date
Group
No.
Release
Page
5.2013
221
009
02
1(5)
SB-10051567-1898
Hose, Engine Oil Fill Tube
LEU, MRU
Cummins ISL-G
FSB 221-009, Hose, Engine Oil Fill Tube
(May 2013)
Certain Mack MRU and LEU trucks equipped with Cummins ISL-G engines built before
February 11, 2013 may exhibit minor oil seepage from the engine oil filler tube hose or display
stress cracks in the hose. This condition is caused by improper installation of the engine oil fill
tube hose during assembly. Trucks built after February 11, 2013 have engine oil fill tube
hoses of the same construction which include index marks to aid in proper assembly. Using
the part numbers listed in the table below, replace the engine oil fill tube hose and clamps to
repair minor oil seepage or stress cracks in the existing hose. Follow the installation
instructions contained in this bulletin for proper clocking/indexing of the new hose.
Note: This bulletin does not apply to MACK Trucks Australia.
W2079924
Required Parts
Engine Oil Fill Tube Hose Replacement Parts
Item
Description
Part Number
Qty
1
Hose, Engine Oil Fill Tube
25496740
1
2
Hose Clamp
984997
2
PV729-FSB221-009_M
USA59605
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
221
009
02
Procedure
You must read and understand the precautions and guidelines in Service Information,
group 20, "General Safety Practices, Engines" before performing this procedure. If you are
not properly trained and certified in this procedure, ask your supervisor for training before
you perform it.
DANGER
Do not attempt to repair or service this vehicle without having sufficient training, the correct
service literature and the proper tools. Failure to follow this could make the vehicle unsafe
and lead to serious personal injury or death.
1 Secure the vehicle for service by parking it on a flat level surface, apply the parking brake,
chock the rear wheels, and place the transmission in neutral or park.
2 Disconnect all battery cables from the negative (ground) battery terminals to prevent
personal injury from electrical shock and prevent damage to electrical components.
3 Secure any loose items in the cab to prevent damage to the dash or windshield when the
cab is tilted. Unlock the pump and tilt the cab forward.
4 Remove P-clamp fasteners securing oil fill tube to frame bracket.
W2079925
Page
2(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
221
009
02
5 Loosen both hose clamps securing hose to the tube and the neck on the oil pan.
W2079926
6 Remove the existing engine oil fill tube hose and clamps.
W2079927
Page
3(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
221
009
02
7 Position the new hose and clamps on the filler tube.
Note: Do not install the hose onto the engine connection past where the taper begins on
the tube. The other end of the hose should extend about 30 mm (1.2 in) on the chassis
filler tube for proper installation.
Note: Do not tighten clamps at this time.
W2080034
8 Loosely connect the oil filler tube P-clamps to the frame mounted bracket, verify that the
lower filler hose is in a relaxed position and aligned with the installation clocking of the
upper tube.
Note: Adjust the lower engine oil fill tube hose to prevent twisting load or excessive
bending of the hose.
9 Tighten P-clamp fasteners to 24 ± 5 Nm (18 ± 4 ft-lb).
W2079925
Page
4(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
5.2013
Group
No.
Release
221
009
02
10 Ensure the hose is aligned properly while in a relaxed position and before securing hose
clamps.
11 Tighten hose clamps to 3 + 0.5 Nm (27 + 5 in-lb).
W2079926
12 Reconnect all previously removed cables to the negative (ground) battery terminals.
13 Lower the cab to the closed and locked position.
14 Start engine, check for proper operation and leaks.
15 Remove wheel chocks.
Reimbursement
This repair may be eligible for reimbursement if a product failure was experienced
within time and mileage limits of the applicable Warranty coverage. Reimbursement
is obtained via the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
01
Labor Code
Primary Labor Code
2192D-CT-80
0.3 hrs.
Causal Part
25496740
MACK Trucks North America engages in a continuous program of testing and evaluating to
provide the best possible product. MACK Trucks North America, however, is not committed
to, or liable for updating existing chassis.
Page
5(5)

Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
Date
Group
No.
Release
Page
2.2013
221
009
01
1(5)
SB-10051567-3229
Hose, Engine Oil Fill Tube
LEU, MRU
Cummins ISL-G
FSB 221–009, Hose, Engine Oil Fill Tube
(February 2013)
Certain Mack MRU and LEU trucks equipped with Cummins ISL-G engines built before
February 11, 2013 may exhibit minor oil seepage from the engine oil filler tube hose or display
stress cracks in the hose. This condition is caused by improper installation of the engine oil fill
tube hose during assembly. Trucks built after February 11, 2013 have engine oil fill tube
hoses of the same construction which include index marks to aid in proper assembly. Using
the part numbers listed in the table below, replace the engine oil fill tube hose and clamps to
repair minor oil seepage or stress cracks in the existing hose. Follow the installation
instructions contained in this bulletin for proper clocking/indexing of the new hose.
Note: This bulletin does not apply to MACK Trucks Australia.
W2079924
Required Parts
Engine Oil Fill Tube Hose Replacement Parts
Item
Description
Part Number
Qty
1
Hose, Engine Oil Fill Tube
25496740
1
2
Hose Clamp
984997
2
PV729-FSB221-009_M
USA57868
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2013
Group
No.
Release
221
009
01
Procedure
You must read and understand the precautions and guidelines in Service Information,
group 20, "General Safety Practices, Engines" before performing this procedure. If you are
not properly trained and certified in this procedure, ask your supervisor for training before
you perform it.
DANGER
Do not attempt to repair or service this vehicle without having sufficient training, the correct
service literature and the proper tools. Failure to follow this could make the vehicle unsafe
and lead to serious personal injury or death.
1 Secure the vehicle for service by parking it on a flat level surface, apply the parking brake,
chock the rear wheels, and place the transmission in neutral or park.
2 Disconnect all battery cables from the negative (ground) battery terminals to prevent
personal injury from electrical shock and prevent damage to electrical components.
3 Secure any loose items in the cab to prevent damage to the dash or windshield when the
cab is tilted. Unlock the pump and tilt the cab forward.
4 Remove P-clamp fasteners securing oil fill tube to frame bracket.
W2079925
Page
2(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2013
Group
No.
Release
221
009
01
5 Loosen both hose clamps securing hose to the tube and the neck on the oil pan.
W2079926
6 Remove the existing engine oil fill tube hose and clamps.
W2079927
Page
3(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2013
Group
No.
Release
221
009
01
7 Position the new hose and clamps on the filler tube.
Note: Do not install the hose onto the engine connection past where the taper begins on
the tube. The other end of the hose should extend about 30 mm (1.2 in) on the chassis
filler tube for proper installation.
Note: Do not tighten clamps at this time.
W2080034
8 Loosely connect the oil filler tube P-clamps to the frame mounted bracket, verify that the
lower filler hose is in a relaxed position and aligned with the installation clocking of the
upper tube.
Note: Adjust the lower engine oil fill tube hose to prevent twisting load or excessive
bending of the hose.
9 Tighten P-clamp fasteners to 24 ± 5 Nm (18 ± 4 ft-lb).
W2079925
Page
4(5)
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2013
Group
No.
Release
221
009
01
10 Ensure the hose is aligned properly while in a relaxed position and before securing hose
clamps.
11 Tighten hose clamps to 3 + 0.5 Nm (27 + 5 in-lb).
W2079926
12 Reconnect all previously removed cables to the negative (ground) battery terminals.
13 Lower the cab to the closed and locked position.
14 Start engine, check for proper operation and leaks.
15 Remove wheel chocks.
Reimbursement
This repair may be eligible for reimbursement if a product failure was experienced
within time and mileage limits of the applicable Warranty coverage. Reimbursement
is obtained via the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
01
Labor Code
Primary Labor Code
2192D-CT-80
0.3 hrs.
Causal Part
25496740
MACK Trucks North America engages in a continuous program of testing and evaluating to
provide the best possible product. MACK Trucks North America, however, is not committed
to, or liable for updating existing chassis.
Page
5(5)