Mini Hydraulic Excavator:
303 (S/N: DMA1-3508)
304 (S/N: NAD1-2810)
305 CR (S/N: DSA1-1191; DGT1-1240)
Service Magazine SEPD0860-00, 23 October 2006, "Improved Start Switch for Mini Hydraulic Excavators". Disregard this article. Refer to the article that follows.
Reference: Special Instruction, REHS3554, "Installation of Start Switch for Mini Hydraulic Excavators"
Description of Change: The entrance of dirt or moisture can cause a malfunction of the start switch. In some cases, the start switch may not correctly return to the neutral position. The new start switch has improved resistance to water and dust.
A change to the electrical wiring and the addition of a power relay is required to make the new start switch compatible with the standard machine arrangement.
Adaptable To: Replace the existing start switch with the new start switch. Refer to Table 1 for the effectivity of the improved start switch.
Effectivity and Adaptability for the Improved Start Switch
Sales Model Effectivity Adaptability
303 CR S/N:DMA3509-UP S/N:DMA1-3508
304 CR S/N:NAD2811-UP S/N:NAD1-2810
305 CR S/N:DGT1241-UP S/N:DGT1-1240
305 CR S/N:DSA1192-UP S/N:DGT1-1191
Reference: Refer to the appropriate Service Manual module Disassembly and Assembly for your machine.
Reference: Refer to Special Instruction, REHS3554, "Installation of Start Switch for Mini Hydraulic Excavators" for installation instructions.