4Y9344 GLASS Caterpillar parts
D6R, D6R II, D6R III, D6R STD, D6T, D6T LGP, D6T LGPPAT, D6T XL, D7H, D7R II, D7R XR, D8R
Rating:
Alternative (cross code) number:
CA4Y9344
4Y-9344
4Y9344
CA4Y9344
4Y-9344
4Y9344
Weight: 19 pounds 8 kg.
TRACK-TYPE TRACTOR,
Compatible equipment models: 4Y9344:
Information:
General Information
Starting systems usually have four major components: ...Start switch...Start relay...Starter solenoid...Starter motor
Illustration 1. Typical cranking circuit.The only exception to this typical cranking circuit is that some small engines do not require the start relay. In this case, the start switch is connected directly to the starter solenoid.
Start switches are relatively low current devices. They are rated to switch approximately 5 to 20 amps. Because the coil of a start relay between TP2 (Test Point 2) and TP1 in Illustration 1 draws about 1 amp, the start switch can easily turn on the start relay and have long life.
The switch contacts of a typical start relay are rated to switch between 100 and 300 amps. Because a starter solenoid requires only 5 to 50 amps, the start relay can easily switch this load.
The starter solenoid has two functions: it engages the pinion with the flywheel, and it is a high current switch rated about 1000 amps that actually turns on the starting motor.
The starter solenoid has two coils: the pull-in coil (W) draws about 40 amps and hold-in coil (X) requires about 5 amps. The instant the start relay closes, both coils (W and X) receive power. Battery voltage is applied to the high end of both coils, at Test Point (3) which is the "start" terminal (S). The low end of hold-in coil (X) is permanently connected to the ground post of the starter motor. Grounding for the low end, Test Point (4), of pull-in coil (W) is momentary, and takes place through the DC resistance of the starter motor. When magnetic force builds in both coils, the starter pinion is moved to engage the ring gear. Only then will the solenoid contacts close to power the starter motor. This temporarily removes the ground from pull-in coil (W), and puts battery voltage on both ends of it while the motor cranks. During this period, the pull-in coil is out of the circuit and draws no current. Cranking continues until power to the motor solenoid is turned off by the start switch.
The result of these switches and relays is to permit a 5 amp dash-mounted switch to turn on a 500 to 1000 amp motor for cranking an engine.
Battery voltage (power) available during cranking depends on the temperature of the batteries. See Chart A. This chart is only a GUIDE as to what to expect from a NORMAL system.
Chart B shows maximum allowable voltage drops in the high current battery circuit to the starter. These values are maximums for engines with more than about 2000 SMH. Newer engines have less voltage drops.
Voltage drops greater than those listed are usually caused by loose and/or corroded connections or bad switch contacts.
The entire diagnostic procedure can be reduced to: ...confirming that batteries are within specifications...switches and cables/wiring from the batteries to the starter are not causing too much voltage loss.
The flow chart in Illustration 2 shows the entire procedure.
If the engine is equipped with the diagnostic connector, the 6V2150
Starting systems usually have four major components: ...Start switch...Start relay...Starter solenoid...Starter motor
Illustration 1. Typical cranking circuit.The only exception to this typical cranking circuit is that some small engines do not require the start relay. In this case, the start switch is connected directly to the starter solenoid.
Start switches are relatively low current devices. They are rated to switch approximately 5 to 20 amps. Because the coil of a start relay between TP2 (Test Point 2) and TP1 in Illustration 1 draws about 1 amp, the start switch can easily turn on the start relay and have long life.
The switch contacts of a typical start relay are rated to switch between 100 and 300 amps. Because a starter solenoid requires only 5 to 50 amps, the start relay can easily switch this load.
The starter solenoid has two functions: it engages the pinion with the flywheel, and it is a high current switch rated about 1000 amps that actually turns on the starting motor.
The starter solenoid has two coils: the pull-in coil (W) draws about 40 amps and hold-in coil (X) requires about 5 amps. The instant the start relay closes, both coils (W and X) receive power. Battery voltage is applied to the high end of both coils, at Test Point (3) which is the "start" terminal (S). The low end of hold-in coil (X) is permanently connected to the ground post of the starter motor. Grounding for the low end, Test Point (4), of pull-in coil (W) is momentary, and takes place through the DC resistance of the starter motor. When magnetic force builds in both coils, the starter pinion is moved to engage the ring gear. Only then will the solenoid contacts close to power the starter motor. This temporarily removes the ground from pull-in coil (W), and puts battery voltage on both ends of it while the motor cranks. During this period, the pull-in coil is out of the circuit and draws no current. Cranking continues until power to the motor solenoid is turned off by the start switch.
The result of these switches and relays is to permit a 5 amp dash-mounted switch to turn on a 500 to 1000 amp motor for cranking an engine.
Battery voltage (power) available during cranking depends on the temperature of the batteries. See Chart A. This chart is only a GUIDE as to what to expect from a NORMAL system.
Chart B shows maximum allowable voltage drops in the high current battery circuit to the starter. These values are maximums for engines with more than about 2000 SMH. Newer engines have less voltage drops.
Voltage drops greater than those listed are usually caused by loose and/or corroded connections or bad switch contacts.
The entire diagnostic procedure can be reduced to: ...confirming that batteries are within specifications...switches and cables/wiring from the batteries to the starter are not causing too much voltage loss.
The flow chart in Illustration 2 shows the entire procedure.
If the engine is equipped with the diagnostic connector, the 6V2150
Caterpillar parts catalog:
Parts glass Caterpillar catalog:
4J8252
GLASS
120H, 120H ES, 120H NA, 12F, 12H, 12H ES, 12H NA, 135H, 135H NA, 140H, 140H ES, 140H NA, 143H, 14E, 14H NA, 153, 16, 160H, 160H ES, 160H NA, 163, 163H NA, 16H NA, 173B, 183B, 193, 215, 225, 235, 416, ...
120H, 120H ES, 120H NA, 12F, 12H, 12H ES, 12H NA, 135H, 135H NA, 140H, 140H ES, 140H NA, 143H, 14E, 14H NA, 153, 16, 160H, 160H ES, 160H NA, 163, 163H NA, 16H NA, 173B, 183B, 193, 215, 225, 235, 416, ...
7G2454
GLASS
D10, D10N, D10R, D11N, D11R, D6H, D6H XL, D6H XR, D6R, D6R II, D6R III, D6R STD, D6T, D6T LGP, D6T XL, D7H, D7R, D7R II, D7R XR, D8L, D8N, D8R, D8R II, D9L, D9N, D9R
D10, D10N, D10R, D11N, D11R, D6H, D6H XL, D6H XR, D6R, D6R II, D6R III, D6R STD, D6T, D6T LGP, D6T XL, D7H, D7R, D7R II, D7R XR, D8L, D8N, D8R, D8R II, D9L, D9N, D9R
1882901
GLASS
D10N, D10R, D11N, D11R, D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II, D9R
D10N, D10R, D11N, D11R, D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II, D9R
1882903
GLASS
D10N, D10R, D11N, D11R, D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II, D9R
D10N, D10R, D11N, D11R, D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II, D9R
1882908
GLASS
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
2081692
GLASS
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
2081693
GLASS
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
2081694
GLASS
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
D6R, D6R II, D6R III, D6T, D6T XL, D7R, D7R II, D8R, D8R II
3858760
GLASS-FIXED
D6R, D6R STD, D7R XR
D6R, D6R STD, D7R XR
3858756
GLASS-SLIDING
D6R, D6R STD, D7R XR
D6R, D6R STD, D7R XR
3854562
GLASS-FRONT
D6T LGP, D6T LGPPAT
D6T LGP, D6T LGPPAT
3854563
GLASS AS-FRONT
D6T LGP, D6T LGPPAT
D6T LGP, D6T LGPPAT
2124216
GLASS-SLIDING
D3G, D4G, D5G
D3G, D4G, D5G
2124215
GLASS
D3G, D4G, D5G
D3G, D4G, D5G
1796475
GLASS
D3G, D4G, D5G
D3G, D4G, D5G
1796474
GLASS
D3G, D4G, D5G
D3G, D4G, D5G
1978774
GLASS-FRONT
D6N, D6N LGP
D6N, D6N LGP
2037742
GLASS
D5N, D5R LGP, D6N, D6N LGP
D5N, D5R LGP, D6N, D6N LGP
3080391
GLASS
583T, 587T, PL83, PL87
583T, 587T, PL83, PL87
3080390
GLASS
583T, 587T, PL83, PL87
583T, 587T, PL83, PL87
3080389
GLASS
583T, 587T, PL83, PL87
583T, 587T, PL83, PL87
3045582
GLASS
583T
583T
3045581
GLASS-FRONT
583T
583T
3070061
GLASS-WINDOW
583T, 587T, PL83, PL87
583T, 587T, PL83, PL87