ELBOW 3457019 - Caterpillar

TECHNICAL INFORMATION BULLETIN MARCH 05, 2003
EXCAVATORS THIS TIB REPLACES THE FEBRUARY 12, 2003 EXCAVATORS TIB (TIBU3793-00), COMPONENT CODES 1374, 1386, 1350, HYDRAULIC OIL OVERCOOLING. DESTROY THE FEBRUARY 12, 2003 TIB.
385B L (ANS) EXCAVATORS
Component Code(s) 1374, 1386, and 1350SUBJECT: HYDRAULIC OIL OVERCOOLING
PROBLEM:
Hydraulic oil may overcool during machine operation in cold weather conditions. Overcooling occurs because the fan pump control runs at a constant speed regardless of the ambient temperature.
SOLUTION:
The installation of an ambient temperature sensor will prevent the hydraulic oil from overcooling. Use the modification that follows in order to install an ambient temperature sensor. Effective with 385B L (ANS305) Excavator, the fan speed control becomes variable. The fan speed will vary from 300 rpm to 800 rpm.
Illustration 1. 219-8382 Plate (Not Serviced)
(A) 60 mm (2.4 inch)
(B) 40 mm (1.6 inch)
(C) 17.5 mm (0.7 inch) diameter 3/4-16-2B thread
(D) 16 mm (0.6 inch)
(E) 40 mm (1.6 inch)
Fabricate a plate from mild steel. The plate is shown in Illustration 1. The plate will be used for the installation of a 107-8618 Temperature Sensor Gp.
Illustration 2. Location Of The Plate On The Upper Frame
(G) 219-8382 Plate
(H) 250 mm (9.8 inch)
(K) 140 mm (5.5 inch)
(L) 40 mm (1.6 inch)
Illustration 3. Installed plate
(1) 219-8382 Plate
Weld the plate to the upper frame under the cab. The location for welding the plate is shown in Illustration 2. The completed installation is shown in Illustration 3.
Illustration 4. Reference For 155-2260 Connecting Plug Kit
Prepare three 18 gage wires that are 2.4 m (8 ft) long. Assemble one end of each wire to the 155-2260 Connecting Plug Kit. Refer to Illustration 4. The plug will be connected to the temperature sensor.
Illustration 5. Machine Electonic Control Module (ECM) And J1 Receptacle
Illustration 6. Detail Of The J1 Receptacle On The Machine ECM
Wiring Connections To The Machine ECM
Wiring Table Machine ECM (J2)
Pin Circuit Number Color Pin Number Wiring
A VS OR 10 D905-YL-18
B GND BK 12 M953-BU-18
C SIG WH 51 Y772-GN-18Table 1. Wiring Connections
Assemble the wires to the J1 receptacle on the ECM. Refer to Illustration 6 and Table 1 for the correct wire locations.
Use a 171-4401 Communication Adapter As. and connect a Personal Computer (PC) to the machine.
Component Reference
New Part
Number
Description Former Part Number
107-8618 Temperature Sensor Gp -
228-5289 Harness Assembly 204-8719
219-8382 Plate -
211-5621 ABL2C+ Software Communications Gp 211-5579
221-8770 ABL1M Software Communications Gp 211-5583Table 2. Component List
Use CAT Electronic Technician (ET) and flash the new software. Refer to Table 2 for the software that is correct for your machine.
Check the machine and make sure the fan speed control is operating correctly.
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