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HOSE 0878468 - Caterpillar



0878468 HOSE Caterpillar parts HOSE
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16
Alternative (cross code) number:
CA0878468
087-8468
0878468
Caterpillar 0878468 HOSE

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Fuses and Relays
Illustration 1 g03791087
Power Distribution (1) From key switch (2) Washdown motor (3) To tractor CAN resistors (4) To transmission ECM (5) Power distribution module (PDM) (6) From fuse "FD5" (7) From fuse "FS8" (8) From fuse "FN3" (9) From fuse "FD1" (10) From fuse "FS3" (11) From fuse "FR12" (12) Washdown relay (13) Tractor connector (14) Screed connector (15) Left screed display (16) To screed CAN resistors (17) Right screed display (18) Machine ECM (19) Right tractor display (20) Left tractor displayWhen the electrical disconnect switch is in the ON position, power from the unswitched bus of the power distribution module (PDM) (5) transfers to the following fuses:
Fuse "FN3" (8) - Unswitched power transfers from this fuse to PDM (5) pin "16" of connector "C1". Power then transfers to terminals "J1-31", "J1-39" and "J1-47" of machine ECM (18) . This voltage input provides power for the ECM. This fuse is rated 20 amp. The ECM is grounded through terminals "J1-13" and "J1-23".
Fuse "FD1" (9) - Unswitched power transfers from this fuse to pin "C1-19" of PDM (5) . Power then transfers to terminal "C9-12" of left tractor display (20) . Fuse "FD1"also sends power to pin "C2-23" of PDM. Power then transfers to terminal "C9-12" of right tractor display (19) . This voltage input provides power to the tractor displays. This fuse is rated 10 amp.
Fuse "FR12" (11) - Unswitched power transfers from this fuse to terminals "1" and "5" of the washdown relay (12) of PDM (5) . This fuse is rated 10 amp.When the machine key switch is moved to the ON position or the START position, the main power relay is energized. Power transfers across the switched side of the main power relay to PDM (5) switched bus. The switched bus provides power to following fuses:
Fuse "FD5" (6) - Switched power transfers from this fuse to pin "C1-8" of PDM (5) . From pin "C1-8" power transfers to terminal "C2-12" of left screed display (15) and right screed display (17) . This voltage signal provides power to the screed displays. This fuse is rated 20 amp.
Fuse "FS8" (7) - Switched power transfers from this fuse to pin "C1-14" of PDM (5) . From pin "C1-14" power transfers to terminal "C2-11" of left screed display (15) and right screed display (17) . This voltage signal provides a wake-up signal to the displays. This fuse is rated 10 amp.
Fuse "FS3" (10) - Switched power transfers from this fuse to pin "C3-5" of PDM (5) . From pin "C3-5" power transfers to terminal "C9-11" of left tractor display (20) and right tractor display (19) . This voltage signal provides a wake-up signal to the displays. This fuse is rated 10 amp.Relays
Washdown relay (12) is equipped with five terminals. The terminals are numbered for identification. Terminal "85" and terminal "86" of the relay are connected to either side of the coil of the relay. Terminal "30" and terminal "87a" are the normally closed switch contacts of the relay.


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