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Part Number
8B7121
FITTING
Category: | Fits: C18, C15, 3306, 3406C, 3406E, C13, C7, C9
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Replaceable OEM Parts (Compatible Models)
No OEM replacement record. Contact us
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CAT 8B7121 FITTING for C18 Caterpillar Part - WSTPARTS

8B7121 FITTING is a Hydraulic System component engineered for Caterpillar C18, C15 and 3306 machines, built to match original factory specifications. It is categorized under Hydraulic System. Every unit is fitment-verified before dispatch, backed by factory-direct pricing and warranty coverage. Contact our parts team with your machine serial number for a fast quotation.

8B7121 FITTING for Caterpillar C18 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement FITTING (Part # 8B7121). Designed for CAT C18, C15, 3306, 3406C, 3406E, C13, C7, C9 equipment.

Compatible Models

Key Features

  • ✔ 100% compatible with CAT C18, C15, 3306, 3406C, 3406E, C13, C7, C9
  • ✔ Meets Caterpillar original quality and performance standards
  • ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
  • ✔ Available for order, contact for lead time

Specifications

Part Number (MPN)8B7121
Product NameFITTING
BrandCAT
Applicable ModelsC18, C15, 3306, 3406C, 3406E, C13, C7, C9
Weight0.05 kg
ConditionNew (Genuine / OEM Equivalent)
Warranty12 Months

FAQ

Is 8B7121 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT C18.

Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.

Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.

📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com

Parts DiagramC15

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C15 · BASIC ENGINE · 243-0551 CAT parts diagram
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13S-9643SEAL-LIP TYPE (WATER TEMPERATURE REGULATOR)
24B-4810LEVER AS-HAND
31B-7538BOLT (5/8-18X5.75-IN)
40S-1587BOLT (1/2-13X1.75-IN)
53H-7654WASHER-HARD (13.5X22.5X3-MM THK)
75P-8247WASHER-HARD (17X32X3.5-MM THK)
86L-3964PIN-COTTER
98M-2530BOLT-12 POINT HEAD (1/2-13X1.25-IN)
106L-3970PIN
113N-8427CARRIER AS-BEARING
129F-2247PLUG-PIPEIn stock
132W-4904RING-SEAL
145L-3495LINK-LEVER
152L-6010PLUG-PIPE
165L-1545CUP-BEARING
177L-6551CONE-BEARING
185L-3556SHIM (0.0200-IN THK)
195L-3557SHIM (0.010-IN THK)
200L-1352BOLT (3/8-16X3.25-IN)
215L-3558SHIM (0.007-IN THK)
225L-3559SHIM (0.005-IN THK)
235L-3613RETAINER-BEARING
240S-1594BOLT (3/8-16X1-IN)
255L-3560PLATE-LOCK
265L-3553YOKE-OPERATING
274F-0411BOLT (3/8-16X6.5-IN)
285L-3485SHAFT-CLUTCH LEVER
296V-5063SEAL-O-RING
306L-5151KEY-WOODRUFF
317X-7731PLUG-PIPE
320S-1591BOLT (3/8-16X1.5-IN)
338T-6761PLUG-PIPE
343N-1462PIN AS
358T-6762PLUG-PIPE
363N-1461SPRING
378T-6767PLUG-PIPE
385L-3602PLATE-PRESSURE
399S-4183PLUG-O-RING
404P-3020PLATE-DRIVE
413N-9175RING-DRIVE
424B-4773LOCK
434B-4764NUT
443N-9176KEY
453N-9178PLATE-HUB & BACK
465L-3603PLATE AS-CENTER
476L-4016PIN
486L-3961PIN-COTTER
495L-3493LEVER
505L-3492YOKE-ADJUSTMENT
515L-3496SLEEVE-SLIDING
520S-1625BOLT (5/8-11X2.5-IN)
535L-3487COLLAR AS
545L-3561SHIM (0.06-IN THK)
552L-6267LOCKNUT (3/8-24-THD)
560L-1648BOLT (3/8-24X2.5-IN)
575B-2410HOSE AS
583B-8489FITTING-GREASE (CLUTCH)
599S-1354NUT (5/8-18-THD)
606F-0253LOCKWASHER
611L-6931SCREW AS-MACHINE (1/4-20X0.5-IN)
625L-3617SEAL-RUBBER
633N-9179HOUSING-CLUTCH
648B-7121FITTING-HYDRAULIC (CLUTCH)
654B-9782BALL
663N-9180SHAFT-CLUTCH
Quality Guarantee
Warranty Period 12 months / under normal use
After-sales Response Response within 24h, solution within 48h
Return Policy Return or exchange within 7 days of receipt (original packaging required)
Quality Inspection 100% inspected before shipment; inspection report on request
Technical Support Free installation guidance; engineer support online
📦 Packaging
Packing Method Genuine or neutral packaging available
Protective Packing Shock-proof & moisture-proof materials
Part Number Label Individual part number label
Customization Custom carton marking supported
After-Sales Service Process
01
Contact Us
Describe issue / send photos
02
Engineer Review
Solution within 24h
03
Confirm Solution
Return, repair or replacement
04
Case Closed
Send-back / re-ship / refund
Apply for After-Sales Service
Online Support ● Online
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✉️Emailcat@wstparts.com
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