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KIT-WHEEL CYLINDER 1666681 - Caterpillar


1666681 KIT-WHEEL CYLINDER Caterpillar parts 814B, 815B, 966D, D25C
Rating:
26
Alternative (cross code) number:
CA1666681
166-6681
1666681
Caterpillar 1666681 KIT-WHEEL CYLINDER
Weight: 4 pounds 2 kg.

Buy KIT-WHEEL CYLINDER 1666681 Caterpillar genuine, new aftermarket tractor parts with delivery
ARTICULATED TRUCK, WHEEL LOADER,

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$99.99

06 Oct 2025
4.7[2.12] Pounds
US: Zbox Global, LL
1666681 Wheel Cylinder Kit fits Caterpillar 814B 815B D25C 966D - Replaces 1666681-8V2539
ZBOX 【DESIGNED TO REPLACE】 1666681 - 8V2539 || 【FITMENT MODELS】 Fits Caterpillar 814B - 815B - D25C - 966D || 【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.
$99.99

06 Oct 2025
3.7[1.67] pounds
US: Zbox Global, LL
1666681 Wheel Cylinder Kit fits Caterpillar 966D 814B 815B D25C - Replaces 1666681-8V2539
ZBOX 【DESIGNED TO REPLACE】 1666681 - 8V2539 || 【FITMENT MODELS】 Fits Caterpillar 814B - 815B - D25C - 966D || 【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. || 【EASY INSTALLATION】Our parts are designed for a straightforward fit, making maintenance quick and simple, which helps reduce downtime and keep your equipment running smoothly.
$109.99

30 Aug 2025
3.7[1.67] pounds
US: Zbox Global, LL
1666681 Wheel Cylinder Kit fits Caterpillar 966D 814B 815B D25C - Replaces 1666681-8V2539
ZBOX 【DESIGNED TO REPLACE】 1666681 - 8V2539 || 【FITMENT MODELS】 Fits Caterpillar 814B - 815B - D25C - 966D || 【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. || 【EASY INSTALLATION】Our parts are designed for a straightforward fit, making maintenance quick and simple, which helps reduce downtime and keep your equipment running smoothly.
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Compatible equipment models: 1666681:

ARTICULATED TRUCK  D25C  
SOIL COMPACTOR  815B  
WHEEL DOZER  814B  
WHEEL LOADER  966D   Caterpillar

Information:

Conditions Which Generate This Code:
Illustration 1 g00722721
Rear view of the PRCM (1) 40-pin connector (2) Relay module
Table 1
Load Specifications For the Internal Relays of the PRCM    
Relay Module and Number     Ratings For Resistive Loads     Ratings For Inductive Loads    
"K1"     7 milliamperes to 1 Amperes (24 DCV)     None (1) (2) (3)    
"K2", "K3", "K4", "K5" (terminal 24), "K6" and "K7"     0.5 to 10 amperes (24 DCV)     0.5 to 10 Amperes (24 DCV) (3)    
"K5" (terminals 23 and 36)     0.5 to 10 Amperes (24 DCV) and 0.5 to 10 Amperes (24 ACV)     0.5 to 5 Amperes (24 DCV) and 0.5 to 7.5 Amperes (110 ACV)    
( 1 ) Do NOT connect inductive loads to these terminals.
( 2 ) The contacts of the relay that is connected to terminals 13 and 14 are gold flashed. The gold socket contact provides a source of low impedance for a low current resistive load. Loads that draw higher currents, currents that are of similar levels as terminals 23 and 36 in table 1 can be applied. However, if heavier loads are applied, the gold flashing will be permanently burned. This will eliminate the gold flashing from the contacts. This does not result in damage to the relay contacts, but the contacts can no longer be used for low current loads.
( 3 ) "K1" (terminals 13 and 14) is not fused.
Illustration 2 g00709866
The Connections for the PRCM to the Relay ModuleThe PRCM provides the internal relay outputs for customer's use. All relays are located in the relay module on the rear of the PRCM. If the CAT data link fails, the relay remains in the state required by the last valid input state. The relay may also be programmed to reset to the OFF position. Refer to Systems Operation, "Setpoint Viewing and Programming".The Possible cause of a CID 0479 FMI 04 is a short circuit of the "K3" relay coil. Clear the diagnostic code from the fault log when the troubleshooting procedure is completed.
Do not apply AC voltages to any relay module terminal other than terminals 23 and 36 of K5 and terminals 13 and 14 of K1 or permanent damage to the relay module will result. All other terminals have flyback diodes connected to them that increase relay life when driving inductive loads; however, this limits their use to DC voltages.
Note: All 3K-8782 Fuses ("AGC-10") in the relay module are rated at 10 Amperes DCV. Test Step 1. CHECK THE STATUS OF THE DIAGNOSTIC CODE.
Turn the ECS to the OFF/RESET position and then turn the ECS to the STOP position.
Press the "MODE" key until the diagnostic code viewing/clearing menu appears.
Observe the upper display. Check that the CID 0479 FMI 04 is active.Note: The "DIAG" indicator will be flashing and the CID 0479 FMI 04 will be present on the display if the

Caterpillar parts catalog:

Caterpillar parts catalog
815B Soil Compactor 17Z00001-UP (MACHINE) POWERED BY 3306 Engine
966D LOADER 99Y00001-05314 (MACHINE) POWERED BY 3306 ENGINE
814B TRACTOR / POWER SHIFT / 16Z00001-UP (MACHINE) POWERED BY 3306 ENGINE
816B LANDFILL COMPACTOR 15Z00001-UP (MACHINE) POWERED BY 3306 ENGINE
966E WHEEL LOADER 99Y05315-UP (MACHINE) POWERED BY 3306 ENGINE
814B TRACTOR / POWER SHIFT / 16Z00001-UP (MACHINE) POWERED BY 3306 ENGINE
816B LANDFILL COMPACTOR 15Z00001-UP (MACHINE) POWERED BY 3306 ENGINE
966E WHEEL LOADER 99Y05315-UP (MACHINE) POWERED BY 3306 ENGINE
D25D, D30D, D350D ARTICULATED TRUCK 1HK00001-00673 (MACHINE) POWERED BY 3306 ENGINE
D40D, D400D ARTICULATED TRUCK 2JJ00001-UP (MACHINE) POWERED BY 3406 ENGINE


Parts kit Caterpillar catalog:

2436718 KIT-CRANKSHAFT BEARING
16G, 16H NA, 24H, 24M, 3406, 3406B, 3406C, 3406E, 3412, 3412C, 3412D, 3412E, 3456, 365C, 365C L, 365C L MH, 374D L, 374F L, 375 L, 385B, 385C, 385C FS, 385C L, 385C L MH, 390D, 390D L, 390F L, 5080, 5...
7E8923 KIT-CRANKSHAFT BEARING
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14G, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 1673C, 1...
9S2013 KIT-RELAY TERMINAL
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 NA, 160G, 160H, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235, 24H, 30/30, 3114,...
9S2291 KIT-POSITIVE DIODE
120G, 120H, 120H ES, 120H NA, 12G, 12H ES, 12H NA, 130G, 135H NA, 140G, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 235, 3114, 3116, 3126B, 3176B, 3176C, 3196, 3...
2339207 KIT-SEAL
120K, 120M, 12H, 12H ES, 12H NA, 12K, 12M, 140G, 140H, 140H ES, 140H NA, 140K, 140M, 14H, 14H NA, 14M, 160H, 160H ES, 160H NA, 160K, 160M, 16G, 16H, 16H NA, 16M, 446B, 446D, 450E, 613C, 613C II, 613G,...
8S4680 KIT-SEAL
130G, 140G, 16G, 215, 235, 245, 3208, 3304, 3306, 3306B, 3406, 3406B, 3408, 3412, 3508, 3512, 3516, 561C, 572G, 613, 627E, 637E, 815B, 826C, 920, 950B, 963, 966C, 977K, 980C, D4D, D5H, D6D, D7G, PR-75...
7N7436 KIT-PISTON RING
14G, 16G, 3176, 3176B, 3304, 3306, 3306B, 3406B, 3406E, 3512, 615C, 621, 621E, 621R, 815B, 966C, 966D, 966F, 966F II, 980C, 980F, C-10, C-12, D25C, D300B, D30C, D350C, D35C
6V1277 KIT-GASKET
3306, 814B, 815B, 816B, 966D, 973, D6D, G3306
1U0381 KIT (flex plate repair-large)
235, 615, 615C, 621, 621B, 621E, 621F, 621G, 623B, 623E, 627B, 627E, 627F, 627G, 631C, 633D, 641B, 651E, 657E, 657G, 773, 824C, 826C, 966C, 966D, 966R, 977L, 983B
9W1495 KIT-METER SERVICE
215B, 215C, 215D, 225, 229, 229D, 231D, 235B, 235C, 235D, 245, 245B, 245D, 631E, 657E, 784B, 785, 785B, 789, 789B, 793B, 793C, 814B, 826C, 834B, 836, 916, 926, 926A, 936, 936F, 988B, 992C, D8L, D9L, I...
2G7182 KIT-CARTRIDGE
611, 615, 615C, 621, 621B, 621E, 621F, 623E, 623F, 627B, 627E, 627F, 631E, 633E II, 637D, 637E, 641B, 651E, 657E, 69D, 768C, 769, 769C, 769D, 771C, 771D, 772, 773B, 773D, 775B, 775D, 776, 776C, 776D, ...
2G7183 KIT-REFILL
611, 615, 615C, 621, 621B, 621E, 621F, 623E, 623F, 627B, 627E, 627F, 631E, 633E II, 637D, 637E, 641B, 651E, 657E, 69D, 768C, 769, 769C, 769D, 771C, 771D, 772, 773B, 773D, 775B, 775D, 776, 776C, 776D, ...
9V0205 KIT-CYLINDER REPAIR
814B, 815B, 966D, D25D, D40D
8V2540 KIT
966D, D25C, D30C, D350C, D35C, D35HP, D400
7X2730 KIT-SEAL
980C, R1600, R1600G
7X2701 KIT-SEAL
980C, 980F, 980F II
7X2688 KIT-SEAL
980C, 980F, 980F II
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