7Y1438 HOUSING-MOTOR Caterpillar parts
320 L, 322, 322 FM L, 322 LN, OEMS
Rating:
Alternative (cross code) number:
CA7Y1438
7Y-1438
7Y1438
CA7Y1438
7Y-1438
7Y1438
Weight: 96 pounds 43 kg.
EXCAVATOR, UNDERCARRIAGE,
Compatible equipment models: 7Y1438:
Number on catalog scheme:
6
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Information:
Illustration 1 g00713118
Solenoid testA basic four terminal starting motor solenoid circuit is shown in Illustration 1. The two windings that are found in the solenoid are the hold-in winding and the pull-in winding. The windings can be checked by using the procedures that follow.Hold-in Winding Test
Illustration 2 g00713128
Hold-in winding test
Refer to Illustration 2 in order to make the connections to the solenoid. Disconnect all other leads to the solenoid.
Close the switch.Observe the reading on the multimeter. Use the battery load tester to adjust the battery voltage until the following voltages are obtained: 12 Volt System ... 10 Volts 24 Volt System ... 20 Volts
Observe the reading on the clamp-on ammeter.The following amperes should be observed: 12 Volt System ... 9.9 to 10.0 Amperes 24 Volt System ... 18.8 to 20.0 AmperesNote: A high reading indicates a shorted winding. A low reading indicates excessive resistance.
The hold-in winding can also be checked by measuring the resistance.Disconnect the batteries. Select the "200 ê" range on the multimeter. Connect one of the leads of the multimeter to the "S" terminal and connect the other lead to the "G" terminal.The following Ohms should be observed: 12 Volt System ... 1.05 0.05 Ohms 24 Volt System ... 1.05 0.05 Ohms
Replace the solenoid if any of the above readings are incorrect.Pull-in Winding Test
Illustration 3 g00713129
Pull-in winding test
Refer to Illustration 3 in order to make the connections to the solenoid. Disconnect all other leads to the solenoid.
Close the switch.Observe the reading on the multimeter. Use the battery load tester to adjust the battery voltage until the following voltages are obtained: 12 Volt System ... 2.5 Volts 24 Volt System ... 5 Volts
Observe the reading on the clamp-on ammeter.The following amperes should be observed: 12 Volt System ... 10.0 to 10.87 Amperes 24 Volt System ... 20.0 to 21.74 AmperesNote: A high reading indicates a shorted winding. A low reading indicates excessive resistance. To avoid excessive heat, do not leave the switch closed for more than 10 seconds at a time. The current will decrease as the heat increases.
The pull-in winding can also be checked by measuring the resistance. Perform the measurement with a voltmeter that reads 0.01 Ohm.Disconnect the batteries. Select the "200 ê" range on the multimeter. Connect one of the leads of the multimeter to the "S" terminal and connect the other lead to the "Mtr" terminal.The following Ohms should be observed: 12 Volt System ... 0.24 0.01 Ohms 24 Volt System ... 0.24 0.01 Ohms
Replace the solenoid if any of the above readings are incorrect.
Caterpillar parts catalog:
Parts housing Caterpillar catalog:
120G, 120H, 120H ES, 120H NA, 12G, 12H, 12H ES, 12H NA, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 211B, 215, 215B, ...
120G, 120H, 120H ES, 120H NA, 12G, 12H ES, 12H NA, 130G, 135H, 135H NA, 140G, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 211B, 214, 215, 215D, 225, 225D, 227, 2...
120G, 120H, 120H ES, 120H NA, 12G, 12H, 12H ES, 12H NA, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 143H, 14G, 14H, 14H NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 215B, 225, 225D, ...
120H, 120H ES, 120H NA, 120K, 120K 2, 12K, 135H, 135H NA, 140G, 140K, 140K 2, 160K, 214B, 224B, 3116, 3126, 3126B, 3126E, 320 L, 320B, 322, 322B L, 322B LN, 322C, 322C FM, 324D, 324D FM, 324D FM LL, 3...
312, 315, 317, 322 FM L, 330, 330 L, 350, 375, 375 L, 5080
318C, 320 L, 320B
322B L, 325B, 325B L, OEMS
320 L, 320B, 320N, 322, 322B L, 322B LN, OEMS
322 FM L, 322B L, 322B LN, 325B, 325B L, M325B
1362807
HOUSING
345B, 345B II, 345B L, OEMS
345B, 345B II, 345B L, OEMS
330B, 330B L, OEMS
1913242
HOUSING
330B, 330B L, OEMS
330B, 330B L, OEMS
0874755
HOUSING-CONTROL
320 L, 322, 322 FM L, 325, 325 LN
320 L, 322, 322 FM L, 325, 325 LN
1111211
HOUSING
325 L, 330
325 L, 330
322 FM L, 325, 325 L, 325 LN
6E6328
HOUSING
325 L, 330
325 L, 330
6I2266
HOUSING-TURBINE
320 L, 322 FM L
320 L, 322 FM L
6I2265
HOUSING-COMPRESSOR
320 L, 322 FM L
320 L, 322 FM L
115, 320 L
1140671
HOUSING-PUMP
320 L, 325
320 L, 325
1140672
HOUSING-CONTROL
320 L, 320N, 322, 322 FM L, 322 LN, 325
320 L, 320N, 322, 322 FM L, 322 LN, 325
1140772
HOUSING-CONTROL
320 L, 320N, 322, 322 FM L, 322 LN, 325
320 L, 320N, 322, 322 FM L, 322 LN, 325
7Y1437
HOUSING-SPROCKET
320 L, 322, 322 FM L, 322 LN, OEMS
320 L, 322, 322 FM L, 322 LN, OEMS