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VALVE AS-RELIEF 5I8066 - Caterpillar


5I8066 VALVE AS-RELIEF Caterpillar parts 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...
Rating:
20
Alternative (cross code) number:
CA5I8066
5I-8066
5I8066
Caterpillar 5I8066 VALVE AS-RELIEF
Weight: 0.26 pounds 0 kg.

Buy VALVE AS-RELIEF 5I8066 Caterpillar genuine, new aftermarket tractor parts with delivery
EXCAVATOR, MOBILE HYD POWER UNIT,

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$50.81

27 Oct 2025

US: Zbox Global, LL
5I8066 Relief Valve fits Caterpillar 311C 311D LRR 312C 312C L 312D L 313D 314C 314D CR 314D LCR 315D L 318D L 319C 319D L 319D LN 320C FM 320C L
ZBOX 【FITMENT MODELS】 Fits Case 311B - 312B - 320B - 320D - Fits Caterpillar 311C - 311D LRR - 312C - 312C L - 312D L - 313D - 314C - 314D CR - 314D LCR - 315D L - 318D L - 319C - 319D L - 319D LN - 320C FM - 320C L - 320D FM - 320D FM RR - 320D GC - 320D L - 320D LN - 320D LRR - 320D RR - 320 L - 320N || 【FITMENT MODELS】 Fits Caterpillar 321D LCR - 323D L - 323D LN - 323D SA - 311 - 312 - Fits John Deere 318C - 320C - 321C || 【AMERICAN OWNED & OPERATED】Fully owned and operated within the United States, our business is dedicated to contributing to local economies, supporting American jobs, and fostering community growth. || 【QUALITY REPLACEMENT】Engineered for durability and performance, our parts meet or exceed OEM specifications. Ideal for construction and agriculture machinery, ensuring reliability and efficiency in tough working conditions. || 【PACK SIZE】This product is a pack of 1, making it easy to stock up and ensure you have the necessary parts on hand for maintenance.

25 Oct 2025

CTP 5I8066 Relief Valve Assembly for Hydraulic System
CTP For Hydraulic System || Highly Efficient || Easy in-and-out fit
$54.99

26 Aug 2025

US: Zbox Global, LL
5I8066 Relief Valve fits Caterpillar 311C 311D LRR 312C 312C L 312D L 313D 314C 314D CR 314D LCR 315D L 318D L 319C 319D L 319D LN 320C FM 320C L
ZBOX 【FITMENT MODELS】 Fits Case 311B - 312B - 320B - 320D - Fits Caterpillar 311C - 311D LRR - 312C - 312C L - 312D L - 313D - 314C - 314D CR - 314D LCR - 315D L - 318D L - 319C - 319D L - 319D LN - 320C FM - 320C L - 320D FM - 320D FM RR - 320D GC - 320D L - 320D LN - 320D LRR - 320D RR - 320 L - 320N || 【FITMENT MODELS】 Fits Caterpillar 321D LCR - 323D L - 323D LN - 323D SA - 311 - 312 - Fits John Deere 318C - 320C - 321C || 【AMERICAN OWNED & OPERATED】Fully owned and operated within the United States, our business is dedicated to contributing to local economies, supporting American jobs, and fostering community growth. || 【QUALITY REPLACEMENT】Engineered for durability and performance, our parts meet or exceed OEM specifications. Ideal for construction and agriculture machinery, ensuring reliability and efficiency in tough working conditions. || 【PACK SIZE】This product is a pack of 1, making it easy to stock up and ensure you have the necessary parts on hand for maintenance.
Number on catalog scheme: 15
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Information:

Conditions Which Generate This Code:The Engine Control Module (ECM) detects the following conditions:
For C7 engines that are not in emergency vehicles, the engine coolant temperature is at least 111° C (232° F) for more than four seconds.
For C7 emergency vehicles and for C9 vehicles, the engine coolant temperature is at least 116° C (241° F) for more than four seconds.
For C9 emergency vehicles with automatic transmissions, the engine coolant temperature is at least 121° C (250° F) for more than four seconds.
The engine has been running more than 30 seconds.Note: This diagnostic code represents a critical event. This diagnostic code does not represent an electronic system fault.System Response:"DIAG" will be displayed next to the "Engine Coolant Temperature"on the Caterpillar Electronic Technician (ET). The check engine lamp and the warning lamp will illuminate.If "Engine Monitoring" is programmed to "Derate" or "Shutdown", the check engine lamp and the warning lamp will flash.Customer passwords are required to clear this diagnostic code.The vehicle speed is limited to a maximum of 72 km/h (45 mph) and the power is limited. If "Engine Monitoring" is programmed to "Shutdown" the engine will shut down once this code has been active for 20 seconds.If "Engine Monitoring" is programmed to "Warning", there is no effect on engine power.This diagnostic code indicates an excessive coolant temperature. This diagnostic code does not indicate a problem with the ECM or a problem with the coolant temperature sensor.Test Step 1. Check the Cooling SystemRefer to Testing and Adjusting, "Cooling System - Check".Results:
OK - STOP

Cat SIS web machinery list:

Caterpillar parts catalog
320B & 320B L Excavators 4XW00001-UP (MACHINE) POWERED BY 3066 Engine
320C, 320C L, 320C LN, 320C S Excavators BBL00001-UP (MACHINE) POWERED BY 3066 Engine
320C & 320C L Excavators AMC00001-UP (MACHINE) POWERED BY 3066 Engine
320C & 320C L Excavators BDC00001-UP (MACHINE) POWERED BY 3066 Engine
320C & 320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engine
312C & 312C L Excavators CBA00001-01200 (MACHINE)
320C Forest Swing Machine BGB00001-UP (MACHINE) POWERED BY 3066 Engine
320C S Hydraulic Excavator EGL00001-UP (MACHINE) POWERED BY 3066 Engine
320C U 320C LU Excavators CLM00001-UP (MACHINE) POWERED BY 3066 Engine
311C U Excavator CKE00001-UP (MACHINE) POWERED BY 3064 Engine
320C Excavators HBC00001-UP (MACHINE) POWERED BY 3066 Engine
314C CR & 314C LCR Excavators KJA00001-UP (MACHINE) POWERED BY 3064 Engine
318C L & 318C LN Excavators GPA00001-UP (MACHINE) POWERED BY 3066 Engine
318C Excavators BTG00001-UP (MACHINE) POWERED BY 3066 Engine
320C & 320C L Excavators MAB00001-UP (MACHINE) POWERED BY 3066 Engine
320C U & 320C LU Excavators MAC00001-UP (MACHINE) POWERED BY 3066 Engine
320C, 320C L, 320C LN Excavators DBG00001-UP (MACHINE) POWERED BY 3066 Engine
320C Hydraulic Material Handler EGA00001-UP (MACHINE) POWERED BY 3066 Engine
320C Material Handler JPL00001-UP (MACHINE) POWERED BY 3066 Engine
321C LCR Hydraulic Excavator MCF00001-UP (MACHINE) POWERED BY 3066 Engine
320C Forest Machines SAH00001-UP (MACHINE) POWERED BY 3066 Engine
312C & 312C L Excavators CBA01201-UP (MACHINE) POWERED BY 3064 Engine
320C & 320C L Excavators RAW00001-UP (MACHINE) POWERED BY 3066 Engine
312C & 312C L Excavators BWH00001-UP (MACHINE) POWERED BY 3064 Engine
319C LN Hydraulic Excavator KGL00001-UP (MACHINE) POWERED BY 3066 Engine
320C LRR Excavator GAD00001-UP (MACHINE) POWERED BY 3066 Engine
320C LN Excavator AXK00001-UP (MACHINE) POWERED BY 3066 Engine
320C & 320C L Excavators GNG00001-UP (MACHINE) POWERED BY 3066 Engine
323D & 323D L Excavator SDC00001-UP (MACHINE) POWERED BY 3066 Engine
320C S Hydraulic Excavator BMZ00001-UP (MACHINE) POWERED BY 3066 Engine
321C LCR Excavator KCR00001-UP (MACHINE) POWERED BY 3066 Engine
323D LN & 323D S Excavators CYD00001-UP (MACHINE) POWERED BY 3066 Engine
320D RR & 320D LRR Excavators EBY00001-UP (MACHINE) POWERED BY 3066 Engine
311C U Excavator PAD00001-UP (MACHINE) POWERED BY 3064 Engine
314C CR Excavator SNY00001-UP (MACHINE) POWERED BY 3064 Engine
320D & 320D L Excavators CXY00001-UP (MACHINE) POWERED BY 3066 Engine
320C L Excavator EAG00001-UP (MACHINE) POWERED BY 3066 Engine
323D L Excavator JLG00001-UP (MACHINE) POWERED BY C6.4 Engine
320D FM Forest Swing Machine CYZ00001-UP (MACHINE) POWERED BY C6.4 Engine
320D RR FM Forest Swing Machine SRT00001-UP (MACHINE) POWERED BY 3066 Engine
323D L Excavator PBM00001-UP (MACHINE) POWERED BY 3066 Engine
315D L Excavator CJN00001-UP (MACHINE) POWERED BY C4.2 Engine
319D L & 319D LN Excavators EAW00001-UP (MACHINE) POWERED BY C4.2 Engine
319D Excavators BZH00001-UP (MACHINE) POWERED BY C4.2 Engine
320D & 320D L Excavators MCH00001-UP (MACHINE) POWERED BY C6.4 Engine
320D & 320D L Excavators FAL00001-UP (MACHINE) POWERED BY C6.4 Engine
320D LRR Excavator XCK00001-UP (MACHINE) POWERED BY C6.4 Engine
320D RR Excavator YDS00001-UP (MACHINE) POWERED BY C6.4 Engine
320D LRR Excavator TAE00001-UP (MACHINE) POWERED BY C6.4 Engine
320D LRR Excavator ZGB00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator MDT00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator NAS00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator PBD00001-UP (MACHINE) POWERED BY C6.4 Engine
315D L Excavator NCM00001-UP (MACHINE) POWERED BY C4.2 Engine
323D LN & 323D S Excavators RAC00001-UP (MACHINE) POWERED BY C6.4 Engine
320D & 320D L Excavators JGZ00001-UP (MACHINE) POWERED BY 3066 Engine
320D Forest Machines BZF00001-UP (MACHINE) POWERED BY C6.4 Engine
320D Log Loader GKS00001-UP (MACHINE) POWERED BY C6.4 Engine
323D L Excavator BYM00001-UP (MACHINE) POWERED BY C6.4 Engine
312D Excavator HJX00001-UP (MACHINE) POWERED BY C4.2 Engine
311D LRR Excavator CLA00001-UP (MACHINE) POWERED BY C4.2 Engine
311D LRR Excavator DDW00001-UP (MACHINE) POWERED BY C4.2 Engine
312D & 312D L Excavators HCW00001-UP (MACHINE) POWERED BY C4.2 Engine
314D CR & 314D LCR Excavators BYJ00001-UP (MACHINE) POWERED BY C4.2 Engine
314D LCR Excavator SBP00001-UP (MACHINE) POWERED BY C4.2 Engine
320D & 320D L Excavators A6F00001-UP (MACHINE) POWERED BY C6.4 Engine
320D L Excavator A9F00001-UP (MACHINE) POWERED BY C6.4 Engine
320D FM Forest Swing Machine BWW00001-UP (MACHINE) POWERED BY C6.4 Engine
315D L Excavator KBD00001-UP (MACHINE) POWERED BY C4.2 Engine
320D & 320D L Excavators JFZ00001-UP (MACHINE) POWERED BY C6.4 Engine
323D L Excavator NDE00001-UP (MACHINE) POWERED BY C6.4 Engine
312D L Excavator TGY00001-UP (MACHINE) POWERED BY C4.2 Engine
320D LN Excavator WBN00001-UP (MACHINE) POWERED BY C6.4 Engine
320D Excavator BZP00001-UP (MACHINE) POWERED BY C6.4 Engine
312D Excavator LRK00001-UP (MACHINE) POWERED BY C4.2 Engine
323D L Excavator LFL00001-UP (MACHINE) POWERED BY C6.4 Engine
323D LN Mobile Hydraulic Power Unit DCJ00001-UP (MACHINE) POWERED BY C6.4 Engine
323D L Excavator PBE00001-UP (MACHINE) POWERED BY C6.4 Engine
323D L Excavator YSD00001-UP (MACHINE) POWERED BY C6.4 Engine
323D & 323D L Excavators WGC00001-UP (MACHINE) POWERED BY C6.4 Engine
312D Excavator DLP00001-UP (MACHINE) POWERED BY C4.2 Engine
311D LRR Excavator LKA00001-UP (MACHINE) POWERED BY C4.2 Engine
311D LRR Excavator DWR00001-UP (MACHINE) POWERED BY C4.2 Engine
311D LRR Excavator PNJ00001-UP (MACHINE) POWERED BY C4.2 Engine
312D L Excavator SKA00001-UP (MACHINE) POWERED BY C4.2 Engine
312D & 312D L Excavators KES00001-UP (MACHINE) POWERED BY C4.2 Engine
312D L Excavator XGK00001-UP (MACHINE) POWERED BY C4.2 Engine
314D LCR Excavator TXN00001-UP (MACHINE) POWERED BY C4.2 Engine
314D CR & 314D LCR Excavator WLN00001-UP (MACHINE) POWERED BY C4.2 Engine
314D LCR Excavator SSZ00001-UP (MACHINE) POWERED BY C4.2 Engine
315D L Excavator BZN00001-UP (MACHINE) POWERED BY C4.2 Engine
315D L Excavator JGS00001-UP (MACHINE) POWERED BY C4.2 Engine
319D L & 319D LN Excavators AYF00001-UP (MACHINE) POWERED BY C4.2 Engine
319D L & 319D LN Excavators KFM00001-UP (MACHINE) POWERED BY C4.2 Engine
320D L & 320D LN Excavators GDP00001-UP (MACHINE) POWERED BY C6.4 Engine
320D LRR Excavator EJT00001-UP (MACHINE) POWERED BY C6.4 Engine
320D & 320D L Excavators KLM00001-UP (MACHINE) POWERED BY C6.4 Engine
320D RR & 320D LRR Excavators GMX00001-UP (MACHINE) POWERED BY C6.4 Engine
320D L Excavator SPN00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator TXA00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator KBZ00001-UP (MACHINE) POWERED BY C6.4 Engine
321D LCR Excavator MPG00001-UP (MACHINE) POWERED BY C6.4 Engine
323D, 323D L & 323D LN Excavators CWG00001-UP (MACHINE) POWERED BY C6.4 Engine
312D & 312D L Excavators PHH00001-UP (MACHINE) POWERED BY C4.2 Engine
315D L Excavator TLE00001-UP (MACHINE) POWERED BY C4.2 Engine
319D L & 319D LN Excavators WBJ00001-UP (MACHINE) POWERED BY C4.2 Engine
323D SA Excavator NES00001-UP (MACHINE) POWERED BY C6.4 Engine
315D L Excavator JHA00001-UP (MACHINE) POWERED BY C4.2 Engine
320D LRR Excavator DHE00001-UP (MACHINE) POWERED BY C6.4 Engine
320D GC Excavator KTF00001-UP (MACHINE) POWERED BY C6.4 Engine
320D GC Excavator PCM00001-UP (MACHINE) POWERED BY C6.4 Engine
320D Excavator KHN00001-UP (MACHINE) POWERED BY C6.4 Engine
319D L Excavator KRM00001-UP (MACHINE) POWERED BY C4.2 Engine
323D L Excavator GTF00001-UP (MACHINE) POWERED BY C6.4 Engine
320D Excavator JPD00001-UP (MACHINE) POWERED BY C6.4 Engine
323D L Mobile Hydraulic Power Unit L5Z00001-UP (MACHINE) POWERED BY C6.4 Engine
313D Excavator KXD00001-UP (MACHINE) POWERED BY C4.2 Engine
313D Excavator WPK00001-UP (MACHINE) POWERED BY C4.2 Engine
318D L Excavator ZKJ00001-UP (MACHINE) POWERED BY C4.2 Engine
910G Wheel Loader AKR00001-UP (MACHINE) POWERED BY 3064 Engine


Parts valve Caterpillar catalog:

5I7643 VALVE
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
1318901 VALVE-DUST
311B, 311C, 311D LRR, 312B, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 320C, 320C FM, 320C L, 320D FM RR, 320D LRR, 320D RR, 320E, 320E L, 320E LN...
0952489 VALVE
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
1710031 VALVE GP-RELIEF
312C, 312C L, 315C, 318C, 319C, 320C, 320C FM, 320C L, 320D, 320D FM RR, 320D LN, 320D LRR, 320D RR, 321C, 321D LCR, 322C, 323D L, 323D LN, 324D, 325C, 325D, 325D L, 330C, 330C L, 330D, 330D L
2128477 VALVE
311C, 312C, 312C L, 314C, 318C, 319C, 320C, 320C FM, 320C L, 320D, 320D LRR, 321C, 323D L, 323D LN
5I7559 VALVE AS
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
7Y4267 VALVE
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, ...
2457837 VALVE AS-EXPANSION
307D, 311D LRR, 311F LRR, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 313D, 313D2, 313D2 LGP, 315D L, 318D L, 318D2 L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR,...
2941684 VALVE-INLET
311D LRR, 312D, 312D L, 313D, 314D CR, 314D LCR, 315D L, 318D L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
2941685 VALVE-EXHAUST
311D LRR, 312D, 312D L, 313D, 314D CR, 314D LCR, 315D L, 318D L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
3109537 VALVE AS
311D LRR, 312D, 312D L, 313D, 314D CR, 314D LCR, 315D L, 318D L, 319D, 319D L, 319D LN, 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA
7Y5457 VALVE AS-SOLENOID
320, 320 L, 325, 325 L, 325 LN, 330 FM L, 330 L, 375 L
5I8026 VALVE AS
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
5I7738 VALVE
311, 311B, 311C, 312B, 312C L, 320 L, 320B, 320C, 320C FM, 320N
5I7739 VALVE
311, 311B, 311C, 312B, 312C, 312C L, 314C, 318C, 319C, 320 L, 320B, 320C, 320C FM, 320C L, 320D, 320D LRR, 320N, 321C, 323D L, 323D LN
5I8015 VALVE AS-FLUID SAMPLING
311B, 311C, 312B, 312C, 312C L, 314C, 320 L, 320B, 320B L, 320B U, 320C, 320N, 321B, 323D L, 323D LN, 325C
5I7526 VALVE
311, 311B, 311C, 312, 312B, 312C, 312C L, 314C, 318C, 319C, 320, 320 L, 320B, 320C, 320C FM, 320C L, 320D, 320D LRR, 321B, 321C, 323D L, 323D LN
1659523 VALVE GP-PILOT
307C, 308C, 311C, 311D LRR, 311F LRR, 312C L, 312D, 312D L, 312E L, 315C, 315D L, 316E L, 318E L, 319D L, 319D LN, 345C, 345C L, 345D, 345D L, 345D L VG, 349D, 349D L
1652881 VALVE-BALL
312C, 312C L, 315C, 318C, 319C, 320C, 320C FM, 320D, 320D FM, 320D GC, 320D L, 322C, 322C FM, 323D L, 323D2 L, 325C, 325C FM, 330C, 330C FM, 330C L, 330C MH, 385B, 5090B, M325C MH
0952489 VALVE
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
1252927 VALVE
311C, 312B, 312C L, 320B, 320B FM LL, 320C, 320C FM
5I5147 VALVE
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, E110B, E120B, E200B
1318901 VALVE-DUST
311B, 311C, 311D LRR, 312B, 312C L, 312D, 312D L, 312D2, 312D2 GC, 312D2 L, 313D, 313D2, 313D2 LGP, 314C, 314D CR, 314D LCR, 320C, 320C FM, 320C L, 320D FM RR, 320D LRR, 320D RR, 320E, 320E L, 320E LN...
5I7643 VALVE
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
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