3420979 SHEET Caterpillar parts
312D, 312D L
Rating:
Alternative (cross code) number:
CA3420979
342-0979
3420979
CA3420979
342-0979
3420979
Weight: 24 pounds 11 kg.
EXCAVATOR,
Number on catalog scheme:
7
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Information:
System Operation
Synchronization System
The 3408/3412 Marine Engine arrangement allows the operator to synchronize both engines on either one of the two throttle signals. To accomplish this, two switch inputs on the ECM are used. The following code determines the throttle usage: For each individual engine, a - Battery - Battery, - Battery + Battery and + Battery + Battery code means the throttle signal in use is the Primary Throttle Signal. A + Battery - Battery code means the throttle signal in use is the Secondary Throttle Signal. This switch is OEM supplied. If Caterpillar synchronization system is not used, then no wires should be connected to pins 1, 2 and 3 of the P2 connector. If the optional CMS display is being used, then engine location (PORT or STBD) must be programmed into the ECM using a service tool (ECAP). The status of the % Throttle and Desired Engine Speed should change when the synchronization switch is changed from independent to PORT or STBD.For example: If the PORT desired speed is set to 1500 rpm and the STBD desired speed is set to 2000 rpm and the synchronization switch is moved from independent to PORT, the Desired Engine Speed for both engines will be 1500 rpm. If the PORT throttle lever is moved the Desired Engine Speed for both engines will change.Schematic
Functional Test
Synchronization System
The 3408/3412 Marine Engine arrangement allows the operator to synchronize both engines on either one of the two throttle signals. To accomplish this, two switch inputs on the ECM are used. The following code determines the throttle usage: For each individual engine, a - Battery - Battery, - Battery + Battery and + Battery + Battery code means the throttle signal in use is the Primary Throttle Signal. A + Battery - Battery code means the throttle signal in use is the Secondary Throttle Signal. This switch is OEM supplied. If Caterpillar synchronization system is not used, then no wires should be connected to pins 1, 2 and 3 of the P2 connector. If the optional CMS display is being used, then engine location (PORT or STBD) must be programmed into the ECM using a service tool (ECAP). The status of the % Throttle and Desired Engine Speed should change when the synchronization switch is changed from independent to PORT or STBD.For example: If the PORT desired speed is set to 1500 rpm and the STBD desired speed is set to 2000 rpm and the synchronization switch is moved from independent to PORT, the Desired Engine Speed for both engines will be 1500 rpm. If the PORT throttle lever is moved the Desired Engine Speed for both engines will change.Schematic
Functional Test
Caterpillar parts catalog:
Parts sheet Caterpillar catalog:
2833649
SHEET-RUBBER
312D, 312D L, 313D
312D, 312D L, 313D
2833933
SHEET-RUBBER
312D, 312D L, 313D
312D, 312D L, 313D
2833934
SHEET-RUBBER
312D, 312D L, 312D2, 312D2 GC, 312D2 L, 313D, 313D2
312D, 312D L, 312D2, 312D2 GC, 312D2 L, 313D, 313D2
2833632
SHEET AS
312D, 312D L, 313D
312D, 312D L, 313D
3078080
SHEET AS
312D, 312D L
312D, 312D L
2738106
SHEET AS
312D, 312D L
312D, 312D L
2896841
SHEET AS
312D L
312D L
2834069
SHEET AS
312D L
312D L
3420980
SHEET
312D, 312D L
312D, 312D L
3421012
SHEET AS
312D L
312D L
3346493
SHEET AS
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
3346497
SHEET AS
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
2834069
SHEET AS
312D L
312D L
2896841
SHEET AS
312D L
312D L
3727624
SHEET AS
315D L, 319D L
315D L, 319D L
3335136
SHEET AS
314D LCR
314D LCR
3273187
SHEET AS
314D LCR
314D LCR
3273184
SHEET AS
314D LCR
314D LCR
3462810
SHEET AS-SOUND SUPPRESSION
314D CR, 314D LCR
314D CR, 314D LCR
3421094
SHEET AS
314D CR, 314D LCR
314D CR, 314D LCR
3346497
SHEET AS
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
3346493
SHEET AS
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
312D, 312D L, 312E, 312E L, 315D L, 316E L, 318E L, 319D L, 319D LN, 320D, 320D L, 320D LRR, 320D RR, 320E, 320E L, 320E LN, 320E LRR, 320E RR, 323D L, 323D LN, 323D SA, 323E L, 324D, 324D L, 324E, 32...
3421012
SHEET AS
312D L
312D L
3420980
SHEET
312D, 312D L
312D, 312D L