NHTSA ID Number: 10164378
Manufacturer Communication Number: 42-056
TSB/Document Date: 2019-09-05
Summary
Fix-As-Fail -+?+? Composite fittings used in the cooling system may crack, resulting in coolant leaks. Brass fittings are available to replace the composite fittings.
Refer to your Engine Operator’s Manual for coolant mix specifications.
After servicing the cooling system, continue monitoring it for 3-5 days. The coolant level in the surge tank
will lower when air trapped in the cooling system is purged. During each pre-trip inspection you should
inspect recently-serviced components of the cooling system for signs of coolant leaks.
1. Fill cap (service point)
2. Pressure cap (never to be removed)
3. Cold Full line
8/28/2019
42-056, 42-058
Page 1 of 2
How to Add Coolant to the Cooling System
WARNING!
Do not remove the surge tank fill cap when the engine is running or the cooling system is hot. Wait
10 minutes for the cooling system to cool down. If the surge tank is still warm to the touch, cover the
fill cap with a thick cloth to prevent the possibility of scalding and then slowly remove the cap.
Failure to follow this instruction could result in personal injury or death.
CAUTION
Due to thermal expansion the coolant level CANNOT be accurately checked if the coolant is above
ambient temperature or the engine has not completely cooled. The coolant level indicated on a
warmed system will be inaccurate and can lead to low coolant conditions during cold-starts.
1. Turn off the engine and let it cool for a minimum of 10 minutes.
2. If your cooling system is built with an air bleed valve in the upper engine coolant pipe, open the air
bleed valve before filling the surge tank.
3. Close any open coolant drain valves in the lower engine coolant pipe.
4. Remove the surge tank fill cap (1). DO NOT remove the surge tank pressure cap (2).
5. Fill the system with premixed coolant through the surge tank fill port. Pour coolant at a steady rate
until it reaches the “MIN” line in the surge tank. Wait for one minute after adding coolant. If the
coolant level drops, add coolant until it returns to the “MIN” line.
6. Close the air bleed valve that was opened in Step 1.
7. Start the engine and maintain an idle at low rpm.
8. While the engine is idling air will purge from the cooling system through the surge tank's coolant fill
port, which will lower the coolant level in the surge tank. Continue to add coolant to the surge tank
until the coolant level remains approximately 1/2 in. (13 mm) above the "MIN" line. This may take
up to 2 minutes depending upon the outside temperature.
9. Maintain a low idle until the thermostat opens and the operating temperature stabilizes. A sign that
the thermostat has opened is when the upper coolant pipe gets hot on the bottom side indicating
hot coolant is now running through it.
10. Add coolant to the surge tank until the coolant remains 1/2 in. (13 mm) above the "MIN" level.
11. Operate the engine at high idle for 10 minutes. Afterward, add coolant to the surge tank until the
coolant remains 1/2 in. (13 mm) above the "COLD FULL" line.
12. Reinstall the surge tank fill cap.
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42-056, 42-058
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42-056 Replace Composite Coolant Fittings with Brass
Page 1 of 2
Repair Notice
42-056
Section
42 - Cooling
Description
Replace Composite Coolant Fittings with Brass
Release Date
8/27/2019
Introduction
Certain vehicles built between 1/16/2014 and 5/17/2019 were built with composite coolant fittings at the engine that may
crack and cause coolant leaks.
Resolution
FIX-AS-FAIL
If a customer reports the problem described above, use the attached Part Number Cross-Reference table and Web Ecat
to determine the correct replacement parts. Replace all of the applicable fittings and hoses even if only one of the fittings
is cracked or leaking.
Warranty
Through Standard Warranty Peterbilt
will pay for parts at dealer net plus applicable mark-up and labor:
0.9 hours to replace fittings and hoses. File a long form claim for applicable labor.
For Field...
Enter...
Failure Location
042-004-017
Failure Type
700
Claim Type
N
SRT:
B42-056
0.9 hours replace coolant fittings and hoses
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42-056 Replace Composite Coolant Fittings with Brass
Page 2 of 2
Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is paid.
Parts
Use Web ECat, in conjunction with the attached Part Number Cross-Reference, to determine the necessary parts
required for this repair.
Quantity
As Required
As Required
Part Number
EC3501
EC7501
Description
U.S. Coolant
Canada Coolant
Procedure
1.
Use the attached Part Number Cross-Reference and Web Ecat to determine the required replacement fittings
and hoses.
a.
In Web Ecat, key the chassis number into the Serial Number field to access the part data.
b. Using the section of the Part Number Cross-Reference that applies to the truck (Model, Engine, EPA
Level), key the part number(s) from the "Old Fitting Used with Composite" column into the search field.
c. If the part(s) are listed in the records found at the bottom, refer back to the Part Number Cross-Reference
and make a note of the corresponding brass version(s) of the part(s) in the "Replacement Metal Fitting"
column.
2.
3.
4.
5.
Drain the coolant into a clean container and save it for reuse following the repair.
Remove the coolant hoses from the composite fittings that need replacement, and then remove the composite
fittings.
Install the brass replacement coolant fittings and the new hoses.
Refill the coolant system with the clean coolant that was drained in Step 2. Add more coolant as necessary.
Refer to the Coolant Fill procedure in the Attachments section.
Attachments
Part Number Cross-Reference
Coolant Fill Procedure
Authored by: PR
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Pre-EPA2017 PACCAR MX-11 Engine
Variations
Port A
Composite
Brass
3/4 in. fitting & 90 deg
V88-1123-690100110 & V38-1166
V38-1090
5/8 in. fitting & straight
V88-1123-500115000 & V38-1166
V38-1018
Variations
5/8 in. fitting & straight
Variations
5/8 in. fitting & straight
Port C
Composite
Brass
V88-1123-500115000 & V38-1166
V38-1018
Port G
Composite
Brass
V88-1123-500115000 & V38-1166
V38-1018
Port P
Variations
3/4 in. fitting & 90 deg
Composite
Brass
V88-1123-690100110 & V38-1166
V38-1090
Port R
Variations
3/4 in. fitting & 45 deg
Composite
Brass
V88-1123-645080090 & V38-1166
D2111-3602 &
V88-1107 (3/4 in.)
Cab Definition
2.1m Cabs
1.9m Cabs
T680, T880, W990
T600 Service cab, C500,
T660, T800, W900
Port P
Port G
Port C
Port R
Port A
Port A
Port A, Option 1
• Manual Trans Cooler
• Brass: V38-1090
• Composite: V38-1166 & V88-1123-6*
Port A, Option 2
• DEF Port w/ Auto Trans Cooler
• Brass: V38-1018
• Composite: V38-1166 & V88-1123-5*
Port C
Port C
• DEF Port w/ Manual Trans Cooler
• Brass: V38-1018
• Composite: V38-1166 and V88-1123-5*
Port G
Port G
• Aux Heater or Drivetrain Cooler
• Brass: V38-1018
• Composite: V38-1166 & V88-1123-5*
Port P
Port R
Port P
Heater
• Brass: V38-1090
• Composite: V38-1166 and V88-1123-6*
Pre-EPA2017 PACCAR MX-13 Engine
Port A
Composite
v88-1123-545080090 & V38-1166
v88-1123-500115000 & V38-1166
v88-1123-645080090 & V38-1166
v88-1123-600115000 & V38-1166
Port C
Variations
Composite
3/4 in. fitting & 45 deg v88-1123-645080090 & V38-1166
Brass
v38-1088
v38-1018
v38-1090
v38-1089
5/8 in. fitting & 45 deg v88-1123-545080090 & V38-1166
v38-1088
Variations
Composite
5/8 in. fitting & 45 deg v88-1123-545080090 & V38-1166
3/4 in. fitting & 45 deg v88-1123-645080090 & V38-1166
Brass
v38-1088
v38-1090
Variations
5/8 in. fitting & 45 deg
5/8 in. fitting & straight
3/4 in. fitting & 45 deg
3/4 in. fitting & straight
Port G
Variations
Port P
Composite
5/8 in. fitting & straight v88-1123-500115000 & V38-1166
3/4 in. fitting & straight v88-1123-600115000 & V38-1166
Variations
5/8 in. fitting & straight
5/8 in. fitting & straight
5/8 in. fitting & straight
5/8 in. fitting & straight
Port R
Composite
v88-1123-500165000 & V38-1166
v88-1123-500115000 & V38-1166
v88-1123-560110095 & V38-1166
v88-1123-600165000 & V38-1166
Brass
v38-1090
Brass
v38-1018
v38-1089
Brass
v38-1018
v38-1018
v38-1018
v38-1089
Cab Definition
2.1m Cabs
1.9m Cabs
T680, T880, W990
T600 Service cab & C500,
T660, T800, W900
Port A, 2.1m or 1.9m, Option 1
• DEF Port w/o REPTO
• Brass: V38-1088
• Composite: V88-1123 & V88-1123-545*
Port A, 2.1m, Option 3
• Man Trans cooler w/o REPTO
• Brass: V38-1090
• Composite: V88-1123 & V88-1123-645*
Port A, 2.1m or 1.9m, Option 2
• DEF Port w/ REPTO
• Brass: V38-1018
• Composite: V88-1123 & V88-1123-500*
Port A, 2.1m, Option 4
• Man Trans cooler w/o REPTO
• Brass: V38-1089
• Composite: V88-1123 & V88-1123-600*
Port C, 1.9m Option 1
• Manual Tmsn Cooler
• Brass: V38-1090
• Composite: V38-1166 & V881123-645*
Port C, Option 2
• Auto Tmsn Cooler
• Brass: D2034-6548
• Composite: None
Port C, 2.1m Option 3
• DEF Coolant w/ Man Trans
• Brass: V38-1088
• Composite: V38-1166 & V88-1123-545*
Port G, Option 1
• 1.9m Aux Heater
• Brass: V38-1088
• Composite: V38-1166 and V881123-5*
Port G, Option 2
• 2.1m Drivetrain cooler w/ high route
exhaust
• 1.9m Drivetrain Cooler
• Brass: V38-1090
• Composite: V38-1166 and V881123-6*
Port G continues on next page
Port G, Option 3
• PB Only Drivetrain
Cooler
• Brass: D2034-6707
• Composite: None
Port G, Option 4
• (2) 2.1m Aux Heater or Drivetrain Cooler
• (2) 1.9m Aux Heater
• Brass: D2119-9001, D2103-2139, & D2006-3210
• Composite: None
Port G, Option 5
• 1.9m (1) Aux Heater and (1) Drivetrain Cooler
• Brass: D2119-9001, D2103-2139, D2006-3210, & D2006-3211
• Composite: None
Port G, Option 6
• (2) 1.9m Drivetrain Cooler
• Brass: D2119-9001, D2103-2139, & D2006-3211
• Composite: None
Port P, Option 1
• 1.9m Cab Heater
• Brass: V38-1018
• Composite: V38-1166 & V88-1123-5*
Port P, Option 2
• T700 Cab Heater
• Brass: V38-1088
• Composite: None
Port P continues on next page
Port P, Option 3
• PB 1.9m Sleeper Heater
• Brass: V38-1019
• Composite: None
Port P, Option 4
• 2.1m Sleeper Heater
• Brass: D2119-9001 & D2034-2146
• Composite: V38-1166 & V88-1123-6*
Port R, Option 1
• 1.9m Sleeper Heater w/ Low Route
Exhaust
• OR PB 587 Cab Heater
• Brass: V38-1018
• Composite: V38-1166 & V88-1123-5*
Port R, Option 2
• T700 Sleeper Heater
• Brass: V38-1088
• Composite: None
Port R, Option 3
• 1.9m Sleeper Heater w/ High Route
Exhaust
• Brass: D2111-3603 & F88-1049
• Composite: V38-1166 & V88-1123-5*
Port R continues on next page
Port R, Option 4
• PB 1.9m Cab Heater
• Brass: D2111-3603 & F88-1050
• Composite: V38-1166 & V88-1123-5*
Port R, Option 5
• 2.1m Cab Heater
• Brass: 26-03499 & V88-1107
• Composite: V38-1166 & V88-1123-6*
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TSB/Document ID: 42-056
Replacement Service Bulletin Number:
MFR Communication Date: 2019-08-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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