Improved Radiator Hoses and New Radiator Pipe Assemblies are Now Used on Certain 374F and 390F Excavators and Mobile Hydraulic Power Units {1380, 5057} Caterpillar


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Improved Radiator Hoses and New Radiator Pipe Assemblies are Now Used on Certain 374F and 390F Excavators and Mobile Hydraulic Power Units {1380, 5057} [M0066848]
COOLING SYSTEM
LINES GP-COOLING
Improved Radiator Hoses and New Radiator Pipe Assemblies are Now Used on Certain 374F and 390F Excavators and Mobile Hydraulic Power Units {1380, 5057}
Excavator
374F (S/N: AT21-UP; AP41-UP; NFJ1-UP; MFL1-UP; DNM1-UP)
390F (S/N: N641-UP; HJD1-UP; TYE1-UP; MGF1-UP; P4J1-UP; HSM1-UP; GAY1-UP)
Mobile Hydraulic Power Unit
374F MHPU (S/N: DP41-UP)
390F MHPU (S/N: B371-UP; PT71-UP)

Description Of Change: Improved radiator hoses and new radiator pipe assemblies are now used on the machines listed above. The hose assembly is now separated into three new radiator hoses and a new metal pipe assembly. The new radiator hoses will improve reliability. The new radiator pipe assemblies provide improved sealing of the coolant line and radiator hoses, and will prevent coolant leaks. The coolant line connection for the upper radiator pipe assembly is now improved from a clamp-type to a thread-type connection.

Adaptable To: A list of parts required for improved radiator hoses and pipe assemblies can be found in Table 1. Illustration 1 shows the new radiator hoses and pipe assembly compared to the former hose assembly. Illustration 2,3,4, and 5 shows the new radiator hoses and pipe assemblies configurations. Improved radiator hoses and new radiator pipe assemblies are effective with and adaptable to the serial numbers listed in Table 2.

Table 1
Required Parts List 
Sales Model  Item  Qty  New Part Number  New Part Name  Former Part Number  Former Part Name  Qty 
374F  37  495-0755  Hose  398-3281  Hose As 
30 495-0624  Pipe As 
34, 39 495-0621  Radiator Hose 
36, 38 144-0367  Hose Clamp 
21 495-0754  Hose  483-6617  Hose 
9 495-0622  Pipe As 
16, 25 495-0621  Radiator Hose 
13, 20, 24 144-0367  Hose Clamp 
6, 14, 26, 27, 33 144-0367  Hose Clamp  8T-4984  Hose Clamp 
10 495-0623  Support As  441-0023  Support As 
31 495-0625  Support As  441-0024  Support As 
7, 12, 28, 38 471-1757  Clip  184-5394  Clip 
8, 11, 29, 32 8T-4136  Bolt  8T-4196  Bolt 
18 168-3332  Adapter Tee  480-2986  Tee Adapter 
17 377-9583  Connector 
23 363-4156  Elbow Adapter 
19 6V-6609  O-Ring Seal 
      5D-1026  Band Clamp 
15, 22 2(1)  423-1983  Hose  423-1983  Hose  2(2) 
390F  37  495-0620  Hose  375-5670  Hose As 
30 495-0624  Pipe As 
34, 39 495-0621  Radiator Hose 
36, 38 144-0367  Hose Clamp 
21 495-0619  Hose  483-6618  Hose 
9 495-0622  Pipe As 
16, 25 495-0621  Radiator Hose 
13, 20, 24 144-0367  Hose Clamp 
6, 14, 26, 27, 33 144-0367  Hose Clamp  8T-4984  Hose Clamps 
10 495-0623  Support As  441-0023  Support As 
31 495-0625  Support As  441-0024  Support As 
7, 12, 28, 38 471-1757  Clip  184-5394  Clip 
8, 11, 29, 32 8T-4136  Bolt  8T-4196  Bolt 
18 168-3332  Adapter Tee  480-2986  Tee Adapter 
17 377-9583  Connector 
23 363-4156  Elbow Adapter 
19 6V-6609  O-Ring Seal 
      5D-1026  Band Clamp 
15, 22 2(3)  423-1983  Hose  423-1983  Hose  2(4) 
(1) Hose length - 690 mm (27.2 inch) and 720 mm (28.3 inch)
(2) Hose length - 765 mm (30.1 inch) and 700 mm (27.6 inch)
(3) Hose length - 700 mm (27.6 inch) and 720 mm (28.3 inch)
(4) Hose length - 795 mm (31.3 inch) and 700 mm (27.6 inch)


Illustration 1g06021422
Improved radiator hose and pipe assembly
Section A-A shows new radiator hose coolant line connection
Section B-B shows former radiator hose coolant line connection
(1) New hoses
(2) New metal pipe assembly
(3) Threaded adapter-tee
(4) Former hose assembly
(5) Clamp


Illustration 2g06021452
New radiator hose and pipe assembly configurations
View C - Upper radiator hose and pipe assembly configuration
View D - Clamp location
View E - Lower radiator hose and pipe assembly configuration


Illustration 3g06021480
View C - Upper radiator hose and pipe assembly configuration
(6) 144-0367 Hose Clamp
(7) 471-1757 Clip
(8) 8T-4136 Bolt
(9) 495-0622 Pipe As
(10) 495-0623 Support As
(11) 8T-4136 Bolt
(12) 471-1757 Clip
(13) 144-0367 Hose Clamp
(14) 144-0367 Hose Clamp
(15) 423-1983 Hose
(16) 495-0621 Radiator Hose
(17) 377-9583 Connector
(18) 168-3332 Adapter Tee
(19) 6V-6609 O-Ring Seal
(20) 144-0367 Hose Clamp
(21) 374F 495-0754 Hose, 390F 495-0619 Hose
(22) 423-1983 Hose
(23) 363-4156 Elbow Adapter
(24) 144-0367 Hose Clamp
(25) 495-0621 Radiator Hose


Illustration 4g06021489
View D - Radiator hose clamp
(26) 144-0367 Hose Clamp


Illustration 5g06021502
View E - Lower radiator hose and pipe assembly configuration
(27) 144-0367 Hose Clamp
(28) 471-1757 Clip
(29) 8T-4136 Bolt
(30) 495-0624 Pipe As
(31) 495-0625 Support As
(32) 8T-4136 Bolt
(33) 144-0367 Hose Clamp
(34) 495-0621 Radiator Hose
(35) 471-1757 Clip
(36) 144-0367 Hose Clamp
(37) 374F 495-0755 Hose, 390F 495-0620 Hose
(38) 144-0367 Hose Clamp
(39) 495-0621 Radiator Hose

Table 2
Effectivity and Adaptability of the Improved Hose and Pipe As 
Sales Model  Effective with  Adaptable to 
374F  S/N:AP4244-UP  S/N:AP41-243 
S/N:AT2161-UP S/N:AT21-160 
S/N:MFL256-UP S/N:MFL1-255 
S/N:NFJ126-UP S/N:NFJ1-125 
S/N:DNM402-UP S/N:DNM1-401 
S/N:DP4104-UP S/N:DP41-103 
390F  S/N:GAY207-UP  S/N:GAY1-206 
S/N:HJD2-UP S/N:HJD1-1 
S/N:HSM307-UP S/N:HSM1-306 
S/N:TYE224-UP S/N:TYE1-223 
S/N:MGF300-UP S/N:MGF1-299 
S/N:P4J103-UP S/N:P4J1-102 
S/N:N64104-UP S/N:N641-103 
S/N:B3798199-UP S/N:B371-98198 
S/N:PT7103-UP S/N:PT71-102 

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