156722-2420 ZEXEL 9 423 610 934 BOSCH FLYWEIGHT 9423610934 1567222420 1157431390

Table 1
Revision Summary of Changes
02 Added serial number prefixes Description Of Change: An updated Diesel Exhaust Fluid (DEF) control unit software is now used on the machine engines listed above. The updated software has been released to improve the priming performance of the DEF pumps in cold environments.Adaptable To:
Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.The new and former part numbers are listed in Table 2.
Table 2
Required Parts
Qty Dosing Control Unit (DCU) Dosing Control Unit (DCU) Voltage New Part Number Part Name Former Part Number(1)
1 Restriction on Hazardous Substance (RoHS) (DCU) 24V 593-7031 Engine Software 567-5763
1 Restriction on Hazardous Substance (RoHS) (DCU) 12V 593-7030 Engine Software 567-5761
1 Non-Restriction on Hazardous Substance (RoHS) (DCU) 24V 593-7033 Engine Software 539-3577
1 Non-Restriction on Hazardous Substance (RoHS) (DCU) 12V 593-7032 Engine Software 539-3576
(1) The former part number listed is for reference only and may differ.The new software is available in the form of a flash file through the Cat ® Service Information System (SIS). A newer part number may be available. SIS Web only displays the latest available flash file.