0341197 JOHNSON EXHAUST HSG., Inner, lower

Check the coolant/antifreeze (glycol concentration) in order to ensure adequate protection against boiling or freezing. Caterpillar recommends the use of a refractometer for checking the glycol concentration. Use the 1U-7298 Coolant/Battery Tester (Degree Celsius) or use the 1U-7297 Coolant/Battery Tester (Degree Fahrenheit). The testers give readings that are immediate and accurate. The testers can be used with ethylene or with propylene glycol.Caterpillar engine cooling systems should be tested at 250 hour intervals for the concentration of Supplemental Coolant Additive (SCA). SCA test kits are available from your Caterpillar dealer. Test the concentration of SCA or submit a coolant sample to your Caterpillar dealer at 250 hour intervals. Refer to S O S Coolant Analysis for more information on this topic.Additions of SCA are based on the results of the test or based on the results of the coolant analysis. An SCA that is liquid or a maintenance element for an SCA (if equipped) may be needed at 250 hour intervals.Table 1 lists the amount of Caterpillar SCA that is needed at the initial fill in order to treat coolant/antifreeze. These amounts of SCA are for systems that use heavy-duty coolant/antifreeze.Table 1 also lists additions of SCA for liquid and for maintenance elements at 250 hours. The additions are required for Caterpillar DEAC and for commercial coolant/antifreezes.
Table 1
Caterpillar SCA Requirements for Heavy-Duty Coolant/Antifreeze
Cooling System Capacity Initial Fill(1) 250 Service Hour Maintenance(2) Spin-on Element at 250 Service Hour Maintenance (If Equipped)(3)
22 to 30 L (6 to 8 US gal) 0.95 L (32 fl oz) 0.24 L (8 fl oz) 111-2370 (1)
31 to 38 L (9 to 10 US gal) 1.18 L (40 fl oz) 0.36 L (12 fl oz) 111-2369 (1)
39 to 49 L (11 to 13 US gal) 1.42 L (48 fl oz) 0.36 L (12 fl oz) 111-2369 (1)
50 to 64 L (14 to 17 US gal) 1.90 L (64 fl oz) 0.47 L (16 fl oz) 9N-3368 (1)
65 to 83 L (18 to 22 US gal) 2.37 L (80 fl oz) 0.60 L (20 fl oz) 111-2371 (1)
84 to 114 L (23 to 30 US gal) 3.32 L (112 fl oz) 0.95 L (32 fl oz) 9N-3718 (1)
115 to 163 L (31 to 43 US gal) 4.75 L (160 fl oz) 1.18 L (40 fl oz) 111-2371 (2)
164 to 242 L (44 to 64 US gal) 7.60 L (256 fl oz) 1.90 L (64 fl oz) 9N-3718 (2)
(1) When the coolant system is first filled, the SCA is not required to be used with Caterpillar DEAC.
(2) Do not exceed the six percent maximum concentration. Check the concentration of SCA with a SCA test kit.
(3) Do not use the maintenance element for the SCA and the liquid for the SCA at the same time.Note: Specific engine applications may require maintenance practices to be periodically evaluated in order to properly maintain the engine's cooling system.Refer to Table 2 for part numbers and for quantities of SCA.
Table 2
Caterpillar Liquid SCA
Part Number Quantity
6V-3542 0.24 L (8 oz)
111-2372 0.36 L (12 oz)
8T-1589 0.47 L (16 oz)
3P-2044 0.94 L (32 oz)
8C-3680 19 L (5 US gal)
5P-2907 208 L (55 US gal) Cooling Systems with Larger Capacities
Adding the SCA to Conventional Coolant/Antifreeze at the Initial Fill
Note: Caterpillar DEAC DOES NOT require an addition of SCA when the cooling system is initially filled.Commercial heavy-duty coolant/antifreeze that meets "ASTM D4985" or "ASTM D5345" specifications MAY require an addition of SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.Use the equation that is in Table 3 to determine the amount of Caterpillar SCA that is required when the cooling system is initially filled with the following fluids:
"ASTM D4985"
"ASTM D5345"
Table 3
Equation For Adding The SCA To Conventional Coolant/Antifreeze At The Initial Fill
V × 0.045 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required. Table 4 is an example for using the equation that is in Table 3.
Table 4
Example Of The Equation For Adding The SCA To Conventional Coolant/Antifreeze At The Initial Fill
Total Volume of the Cooling System (V) Multiplication Factor Amount of SCA that is Required (X)
946 L
(250 US gal)