L&M MESABI User manual

SERVICE MANUAL
5.7 S-Fin
Oil and Air Coolers
H i g H P r e SS u r e
A i r - T o-o i l C oo l e r S
A
i r - T o- A i r C oo l e r S
Consult Nameplate for Pressure Rating
Please read and follow
instructions carefully
before proceeding with any
service work and/or repairs.
Consult factory before pro-
ceding with any possible
warranty claims.

CONTENTS
S-Fin Coolers
Warranty .........................................................................................Page 2
Standard Parts ............................................................................... Page 3
External Cleaning and Tube Removal ........................................... Page 4
Seal Removal, Plate Preparation and Seal Installation................. Page 5
Tube Installation………………………………................................... Page 6
Frame Assembly……………........................................................... Page 9
Warranty
Consult L&M before proceeding with warranty claims or repair. 5.7 S-Fin
General Warranty is 18 months from date of manufacturer. Contact L&M
Radiator Customer Service for more details.
L&M Radiator Inc.
1414 East 37th St.
Hibbing, MN 55746
800-346-3500
218-263-8993
www.mesabi.com

Standard Parts:
Models S-Fin Air and Oil Coolers
Exploded view of a typical MESABI® S-Fin Cooler.

External Cleaning and
Tube Removal
Helpful Hints:
*Read this manual thoroughly
*Work in a clean environment
*Good lighting is a must
*Use proper tools and lubricant
*Call L&M Customer Service (800-346-3500) with
questions.
External Cleaning
To maintain efficiency and assure maximum life of
MESABI S-Fin coolers, reasonable care must be
taken when cleaning.
In some cases it may be best to blow out any dry dirt
with shop air prior to washing the core with a high
pressure washer. If there is any doubt on cleaning
method to be used, try the method on a portion of a
single tube first, or contact L&M Customer Service.
For general external cleaning, high pressure hot
water (with or without soap) can be used at pressures
up to 1200 psi (8274 kPa). You must spray straight
into the core-not an angle (stay at least 6 inches away
from tubes).
It is important to start on the air exit side. Work from
top to bottom. Concentrate on small areas and work
slowly. Keep washing until the water exiting the
opposite side is free from dirt and debris. Complete
this side and then repeat the process for the other
side.
Many radiator shops use a hot alkaline soap or
caustic soda in their boil-out tanks with chemical
additives. Soaking in high pH solutions may damage
the aluminum alloy, depending on the exact
characteristics of the solution. Solutions that are
either too alkaline (pH>9) or acidic (pH<5) are not
recommended.
Removing MESABI Tubes –
1. After a thorough cleaning as described above,
blow dry the core section. Remove the T block bolts
and then slide the T block out from between the
tubes.
2. Remove plastic seal retainer then remove O-ring
from tank making room for tube removal, being very
careful not to damage the tube or sealing surface in
the tank. (The seal will need to be replaced).
3. Using the tube removal tool PN 317596 on the
opposite end of the tank,and or by gripping tube by
hand, push the tube into the T block side tank.
4. Once short machined end of the tube clears the
header on the opposite side slowly remove tube
using the least angle possible, being careful to not
damage the tube end. Set the tubes and removed
parts aside, keep them clean and protected for re-
assembly.
Caution: Minimize the removal angle and do not force
the tube out. Care must be taken to not damage tube.
5. Clean the header plate with high pressure washer,
then blow the inside and outside surfaces of the
tanks thoroughly dry with air.

6. On the short tube side tank, carefully, insert the
seal tool between the seal and groove, then remove
the rubber seal from the groove and discard. (Seals
that are inadvertently dropped in the tank must be
removed).
7. Thoroughly clean and inspect the seal groove in
the tanks/headers.
Insert a clean brush into the header plate tube hole.
Rotate the brush to remove any debris that may be in
the groove. Use clean compressed air to blow tanks
clean. Inspect seal groove to make sure it is clean
and free of any defects. Fine emery cloth may be
used to polish out minor scratches in the sealing
surfaces of the groove.
8. After inspection and cleaning lightly lubricate seal
groove and protect from dirt prior to tube installation.
New Seal Installation
9. Lubricate seals with lubricant 100276 and protect
from dirt.
9. Using the flat hooked end of the seal tool, pull the
proper lubricated seal into an oval shape and insert
one end of the seal into the seal groove.
With your finger, push the other end of the seal into
the groove while controlling the opposing end with
the flat end of the seal tool.
10. Use the back of the seal tool to press the seal
firmly into the groove so that it does not bulge out.
To avoid pinching the seal between the tube and
groove, a small amount of lubricant may be needed to
hold the seal tightly to the long sides of the groove.
Note: The seal needs to be completely seated into the
groove in order for the tube to be installed properly.
11. Repeat as necessary for remaining tubes in the
repair. Protect from dirt prior to tube installation.