2478812 ROD AS Caterpillar parts
324D, 324D FM, 324D L, 324D LN
Rating:
Alternative (cross code) number:
CA2478812
247-8812
2478812
CA2478812
247-8812
2478812
Weight: 183 pounds 83 kg.
EXCAVATOR, MOBILE HYD POWER UNIT,
Related part:
2478812
ROD AS
0R8489
R
2478812
ROD AS-HYD-YM
4935524
CL
Compatible equipment models: 2478812:
Number on catalog scheme:
9
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Information:
Illustration 1 g02274133
Power Train Schematic
(1) Chassis ECM
(2) Transmission oil temperature sensor
(3) Switch for the body position
(4) Speed sensor inputs
(5) Transmission control inputs
(6) Modulating valves for the transmission
(7) Main relief valve
(8) Sump for the transmission
(9) Lubrication relief valve
(10) Magnetic screen
(11) Bypass switch
(12) Bypass switch
(13) Filter for the transmission oil
(14) Filter for the torque converter oil
(15) Scavenge pump for the transmission
(16) Charge pump for the torque converter
(17) Charge pump for the transmission
(18) Pump for the brake cooling
(19) Screen
(20) Sump for the torque converter
(21) Power train oil cooler
(22) Bypass valve for the oil cooler
(23) Level sensor for the transmission oil
(24) Inlet relief valve for the torque converter
(25) Temperature sensor for the torque converter
(26) Torque converter
(27) Torque converter lockup clutch Brief Summary of Operation
The transmission speed sensor magnetically measures the transmission speed.
The control for the electronic programmable transmission determines the proper moment for shifting. The control uses signals from the transmission speed sensor and the shift lever switch to determine the moment for shifting. The electronic programmable transmission activates the solenoids in order to make shifts.
The Cat data link connects the Chassis Electronic Control Module (Chassis ECM) with automatic electronic traction aid and the Monitoring System. The connection exists so the input from the transmission speed sensor can be shared.
The body raise switch prevents any reverse operation of the transmission during the raise operation of the body. The hoist control position sensor also prevents any reverse operation of the transmission during the lowering operation of the body. The body up sensor will signal the limiting function on the gears. This limits the speed of the machine while the body is up.
The switch for the parking and secondary brake and the retarder and service brake switch send input signals to the Chassis ECM. When the secondary parking brake switch or the retarder and service brake switch are activated, the anti-hunt timer is deactivated. When the service brake and the retarder switch are activated, the Chassis ECM will allow rapid speed shifts.
The shift lever switch selects desired speed and direction.
The Chassis ECM will energize pairs of solenoids on the clutch modulating valves for the transmission. This sequence causes the correct pair of clutches to be engaged for the next desired speed.
The transmission hydraulic control will individually control the maximum pressure in each clutch. The transmission hydraulic control will individually modulate each clutch in order to control the fill time and the release time.
When the modulating valve for the torque converter lockup clutch is activated, pressure oil is sent to the torque converter lockup clutch. This oil engages the lockup clutch of the torque converter for direct drive.
The Chassis ECM uses the Caterpillar Data Link to communicate with the Monitoring System. The Monitoring System informs the operator of the transmission gear that is engaged. General Description
The power train consists of four basic systems. The following systems are the four basic systems:
Chassis Electronic Control Module (Chassis ECM)
Torque Converter
Transfer Gears and Transmission
Differential and Final DrivesThe four basic systems are connected by an electrical connection, a hydraulic connection, a
Caterpillar parts catalog:
Parts rod Caterpillar catalog:
120H, 120H ES, 120H NA, 120K, 120K 2, 12K, 12M, 135H, 135H NA, 140G, 140K, 140K 2, 140M, 160K, 30/30, 3114, 3116, 3126, 3126B, 3126E, 320B, 322B L, 322B LN, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 3...
120H, 120K, 120K 2, 12H, 12K, 12M, 135H, 140G, 140K, 140K 2, 140M, 140M 2, 160K, 160M, 160M 2, 2290, 2390, 2391, 2491, 2590, 3126, 3126B, 3126E, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 324D L, 324D ...
307C, 308C, 311, 311B, 311C, 311D LRR, 311F LRR, 312B, 312B L, 312C, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 312E, 312E L, 313B, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 314E CR, 314E ...
324D, 324D L, 324D LN, 324E, 324E L, 324E LN, 326D L
324D, 324D L, 324D LN, 325D, 325D L, 326D L, 328D LCR, 329D, 329D L, 329D LN, 330D, 330D FM, 330D L, 330D LN, 330D MH, 336D, 336D L, 336D LN, 336D2, 336D2 L, 340D L, 340D2 L, 345C L, 385C, 385C L
323D LN, 323D SA, 324D FM, 324D FM LL, 325D, 325D L, 329D, 329D L, 329D LN, OEMS
2897963
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2798109
ROD AS
324D, 324D LN, 324E LN, 325D, 325D L, 329D LN
324D, 324D LN, 324E LN, 325D, 325D L, 329D LN
2478802
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2897971
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2394409
ROD
324D FM, 324D FM LL, 325D FM, 325D FM LL, 325D L, 325D MH, 329D L
324D FM, 324D FM LL, 325D FM, 325D FM LL, 325D L, 325D MH, 329D L
3848190
ROD AS
324D FM
324D FM
2897963
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2478825
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
323D LN, 323D SA, 324D FM, 324D FM LL, 325D, 325D L, 329D, 329D L, 329D LN, OEMS
324D, 324D L, 324D LN, 325D, 325D L, 326D L, 328D LCR, 329D, 329D L, 329D LN, 330D, 330D FM, 330D L, 330D LN, 330D MH, 336D, 336D L, 336D LN, 336D2, 336D2 L, 340D L, 340D2 L, 345C L, 385C, 385C L
3509341
ROD AS
324D, 324D L, 324E, 324E L, 324E LN, 326D L
324D, 324D L, 324E, 324E L, 324E LN, 326D L
2590672
ROD AS
324D, 324D L, 326D L
324D, 324D L, 326D L
320D, 320D FM, 320D L, 320D2, 320D2 L, 320E LN, 323D L, 323D LN, 323D SA, 323D2 L, 323E L, 325D, 325D L, 328D LCR, 329D, 329D L, 329E, 329E L, 329E LN
320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L
2478867
ROD AS
320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L
320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, 320D2 L, 321D LCR, 323D L, 323D LN, 323D SA, 323D2 L
2897971
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2478802
ROD AS
324D, 324D FM, 324D L, 324D LN
324D, 324D FM, 324D L, 324D LN
2798109
ROD AS
324D, 324D LN, 324E LN, 325D, 325D L, 329D LN
324D, 324D LN, 324E LN, 325D, 325D L, 329D LN