4I5520 VALVE Caterpillar parts
320B, 320B FM LL, 320N, 322B L, 322B LN, 325, 325 LN, 325B, 325B L, 330, 330B, 330B L, W330B
Rating:
Alternative (cross code) number:
CA4I5520
4I-5520
4I5520
CA4I5520
4I-5520
4I5520
Weight: 0.18 pounds 0 kg.
EXCAVATOR, WHEELED EXCAVATOR,
Compatible equipment models: 4I5520:
Number on catalog scheme:
5
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Information:
Probable Causes
Alternator
Charging CircuitRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps Values Results
1. Condition of the Alternator Drive Belts
A. Inspect the condition of the alternator drive belts.
B. Check the belt tension. If the engine is equipped with an automatic belt tensioner, check the automatic belt tensioner.
Excessive belt tension can result in damage to the alternator.
Drive Belt
Result: The alternator drive belts are in good condition and the belt tension is correct.
Proceed to Test Step 2.
Result: The alternator drive belts are not in good condition or the belt tension is incorrect.
Repair: If the alternator drive belts are worn or damaged, replace the belts. Refer to Disassembly and Assembly for the correct procedure.
If necessary, replace the automatic belt tensioner. Refer to Disassembly and Assembly for the correct procedure.
2. Condition of the Alternator Drive Pulley
A. Check the condition of the alternator drive pulley. Look for deep grooves that have been worn into the pulley by the belt. Check that the nut for the pulley has not become loose.
Alternator Drive Pulley
Result: There is excessive wear on the alternator drive pulley.
Repair: Replace the pulley.
Result: The alternator drive pulley nut was loose.
Repair: Tighten the nut.
Result: There is not excessive wear on the alternator drive pulley.
Proceed to Test Step 3.
3. Wear of the Alternator Bearings
A. Check the alternator bearings for signs of wear.
Alternator Bearings
Result: The alternator bearings are OK.
Proceed to Test Step 4.
Result: The alternator bearings are not OK.
Repair: Repair the alternator or replace the alternator, as needed. Refer to Disassembly and Assembly for the correct procedure.
4. Operation of the Alternator or Regulator
A. Verify that the alternator or the regulator is operating correctly. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for the proper testing procedures.
Regulator and Alternator
Result: The regulator and alternator are operating properly.
Proceed to Test Step 5.
Result: The regulator and alternator are not operating properly.
Repair: Repair the alternator and regulator or replace the alternator and regulator, as needed. Refer to Disassembly and Assembly for the correct procedure.
5. Inspection of the Charging Circuit
A. Inspect the battery cables, wiring, and connections in the charging circuit.
Charging Circuit
Result: The charging circuit is not working properly.
Repair: Clean all connections and tighten all connections. Replace any faulty parts.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
Alternator
Charging CircuitRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps Values Results
1. Condition of the Alternator Drive Belts
A. Inspect the condition of the alternator drive belts.
B. Check the belt tension. If the engine is equipped with an automatic belt tensioner, check the automatic belt tensioner.
Excessive belt tension can result in damage to the alternator.
Drive Belt
Result: The alternator drive belts are in good condition and the belt tension is correct.
Proceed to Test Step 2.
Result: The alternator drive belts are not in good condition or the belt tension is incorrect.
Repair: If the alternator drive belts are worn or damaged, replace the belts. Refer to Disassembly and Assembly for the correct procedure.
If necessary, replace the automatic belt tensioner. Refer to Disassembly and Assembly for the correct procedure.
2. Condition of the Alternator Drive Pulley
A. Check the condition of the alternator drive pulley. Look for deep grooves that have been worn into the pulley by the belt. Check that the nut for the pulley has not become loose.
Alternator Drive Pulley
Result: There is excessive wear on the alternator drive pulley.
Repair: Replace the pulley.
Result: The alternator drive pulley nut was loose.
Repair: Tighten the nut.
Result: There is not excessive wear on the alternator drive pulley.
Proceed to Test Step 3.
3. Wear of the Alternator Bearings
A. Check the alternator bearings for signs of wear.
Alternator Bearings
Result: The alternator bearings are OK.
Proceed to Test Step 4.
Result: The alternator bearings are not OK.
Repair: Repair the alternator or replace the alternator, as needed. Refer to Disassembly and Assembly for the correct procedure.
4. Operation of the Alternator or Regulator
A. Verify that the alternator or the regulator is operating correctly. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for the proper testing procedures.
Regulator and Alternator
Result: The regulator and alternator are operating properly.
Proceed to Test Step 5.
Result: The regulator and alternator are not operating properly.
Repair: Repair the alternator and regulator or replace the alternator and regulator, as needed. Refer to Disassembly and Assembly for the correct procedure.
5. Inspection of the Charging Circuit
A. Inspect the battery cables, wiring, and connections in the charging circuit.
Charging Circuit
Result: The charging circuit is not working properly.
Repair: Clean all connections and tighten all connections. Replace any faulty parts.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
Caterpillar parts catalog:
Parts valve Caterpillar catalog:
311, 311B, 311C, 312B, 312C L, 320 L, 320B, 320C, 320C FM, 320N
311, 311B, 311C, 312, 312B, 312C, 312C L, 314C, 318C, 319C, 320 L, 320B, 320C, 320C FM, 320C L, 320D, 320D FM RR, 320D LRR, 320D RR, 320N, 321C, 321D LCR, 323D L, 323D LN
311, 311B, 311C, 311D LRR, 312, 312B, 312C, 312C L, 312D, 312D L, 313D, 314C, 314D CR, 314D LCR, 315D L, 318C, 318D L, 319C, 319D, 319D L, 319D LN, 320 L, 320B, 320C, 320C FM, 320C L, 320D, 320D FM, 3...
311, 311B, 311C, 312, 312B, 312C, 312C L, 314C, 318C, 319C, 320 L, 320B, 320B U, 320C, 320C FM, 320C L, 320D, 320D LRR, 320N, 321C, 323D L, 323D LN
311, 311B, 311C, 312B, 312C, 312C L, 314C, 318C, 319C, 320 L, 320B, 320B FM LL, 320C, 320C FM, 320C L, 320D, 320D LRR, 321C, 323D L, 323D LN, E110, E110B, E120B, E200B, E450
318C, 319C, 320, 320 L, 320B, 320B FM LL, 320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320N, 321C, 321D LCR, 323D L, 323D LN, 323D SA
315D L, 316E L, 318C, 318D L, 318E L, 319C, 319D, 319D L, 319D LN, 320 L, 320B, 320B L, 320C, 320C FM, 320C L, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 320D2, 320D2 GC, ...
227, 229D, 322C, 325B L, 518, 528, 528B, 530B, 561D, 589, 615, 615C, 621, 621B, 621R, 623E, 627B, 637E, 651E, 657E, 814, 814B, 815, 815B, 910, 931B, 943, 950, 953, 966C, 966D, 966R, 977K, 977L, 980B, ...
315, 330, 350, 375, 375 L, 5080
325 LN, 330 L
325 LN, 330 L
325 LN, 330 L
5Q3795
VALVE GP-RELIEF
320 L, 320B FM LL, 320C FM
320 L, 320B FM LL, 320C FM
2117065
VALVE
AD30, AD45, AD55
AD30, AD45, AD55
1868174
VALVE AS
AD45
AD45
2238822
VALVE
320C FM, 322C, 322C FM, 325C FM, 330C FM, 345C
320C FM, 322C, 322C FM, 325C FM, 330C FM, 345C
1526749
VALVE-BALL
322B L, 325B L, 330B L
322B L, 325B L, 330B L
1780700
VALVE-FLOW DIVIDER
515, 517, 525, 525B, 527, 535B, 545, 574
515, 517, 525, 525B, 527, 535B, 545, 574
1603511
VALVE GP-RELIEF
320B FM LL, 320C FM, 325B L, 325C, 325C L, 325D MH, 330B L, 330C L, 330C MH, 330D MH, 345B, 345B II, 345B II MH, 345B L, 345C, 345C MH, 350 L, 365B, 365B II, 365C L MH, 375 L, 385C L MH, M325B, M325C ...
320B FM LL, 320C FM, 325B L, 325C, 325C L, 325D MH, 330B L, 330C L, 330C MH, 330D MH, 345B, 345B II, 345B II MH, 345B L, 345C, 345C MH, 350 L, 365B, 365B II, 365C L MH, 375 L, 385C L MH, M325B, M325C ...
1603507
VALVE GP-FLOW CONTROL
320B FM LL, 325B L, 325C L, 330B L, 330C L, 345B II, 345B L, 345C, 350 L, 365B, 365B II, 365C L MH, 385C L MH, M325C MH, M325D L MH, M325D MH, M330D
320B FM LL, 325B L, 325C L, 330B L, 330C L, 345B II, 345B L, 345C, 350 L, 365B, 365B II, 365C L MH, 385C L MH, M325C MH, M325D L MH, M325D MH, M330D
1602756
VALVE-NEEDLE
320B FM LL, 320C FM, 325B L, 325C, 325C L, 325D MH, 330B L, 330C L, 330C MH, 330D MH, 345B, 345B II, 345B II MH, 345B L, 345C, 345C MH, 350 L, 365B, 365B II, 365C L MH, 375 L, 385C L MH, M325B, M325C ...
320B FM LL, 320C FM, 325B L, 325C, 325C L, 325D MH, 330B L, 330C L, 330C MH, 330D MH, 345B, 345B II, 345B II MH, 345B L, 345C, 345C MH, 350 L, 365B, 365B II, 365C L MH, 375 L, 385C L MH, M325B, M325C ...