freightliner CL112 2015, Maintenance Manual

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bolts and nuts are to be checked at Initial Mainte-
nance (IM). See
Fig. 13 for pre-EPA2007 engine
mounts. Check the torque of frame fasteners to off-
set the effects of "bedding in" (or seating). When
checking torque, torque the nut, not the bolt head
whenever possible. This will give a true torque read-
ing by eliminating bolt-body friction. When checking
the torque of frame fasteners, inspect the frame for
cracks and other damage. Set a click-type torque
wrench to the maximum torque of the fastener you
are checking. Apply pressure until the torque wrench
clicks. Do not loosen the bolt to check the torque.
See the applicable torque table in
Group 00 for
torque specifications.
NOTICE
Make sure frame fasteners are properly tightened.
Continued vehicle operation with loose fasteners
could result in bracket or frame damage.
NOTE: Engine supports on vehicles built from
January 2007 do not require checking.
Check the fasteners at the following locations:
•
Axle Stops
•
Deck Plates
•
Engine Trunnion Supports
•
Equalizer Brackets
•
Exhaust Brackets
•
Fifth Wheel Legs
•
Fifth Wheel Mountings
•
Frame Crossmembers and Gussets
•
Front Frame Brackets
•
Front Suspension Spring Brackets
•
Fuel Tank Brackets
•
Radius Rods
•
Rear Engine Supports
•
Rear Suspension Spring Brackets
•
Shock Absorbers
•
All Other Frame Fasteners
Any component that shows signs of cracking or other
damage must be repaired or replaced. Refer to the
Columbia® Workshop Manual for repair or replace-
ment information in the respective section for the
component in question.
31–04 Trailer Electrical
Connector Lubrication
In some cases, failure of trailer cables occurs due to
intrusion of chloride-based road deicing chemicals
1
2
3
2
f220054
4
5
5
8
6
7
9
10
11
12
10
13
03/30/95
1. Capscrew, 3/4– x 4.5
Inch, Grade 8
2. Washer, 3/4 Inch
3. Engine Leg
4. Capscrew, 1/2–13 x
1.5 Inch, Grade 8
5. Washer, 1/2 Inch
6. Upper Isolator
7. Rear Engine Mount
8. Nut, 5/16–18
9. Capscrew, 5/8–11 x
2.5 Inch, Grade 8
10. Washer, 5/8 Inch
11. Lower Isolator
12. Nut, 3/4–10
13. Nut, 5/8–11
Fig. 13, Rear Engine Mount Assembly (pre-EPA07
engines)
Frame and Frame Components
31
Columbia Maintenance Manual, July 2017
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