CAT 9X6620 NUT for 3126B Caterpillar Part - WSTPARTS
Need a dependable Bolt/Nut part for your Caterpillar 3126B machine? The 9X6620 NUT from WSTPARTS is manufactured to OEM-grade tolerances. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3126B: AIR INLET AND EXHAUST SYSTEM, group 199-6064, page 438; C27: ELECTRICAL AND STARTING SYSTEM, group 389-7402, page 224.
9X6620 NUT for Caterpillar 3126B — Genuine CAT & Replacement Part
WSTPARTS supplies genuine CAT and OEM-equivalent direct-replacement NUT (Part # 9X6620). Designed for CAT 3126B equipment.
Compatible Models
Key Features
- ✔ 100% compatible with CAT 3126B
- ✔ Meets Caterpillar original quality and performance standards
- ✔ Genuine CAT lines: New Genuine / Cat Reman / Cat Classic | OEM-equivalent direct replacements
- ✔ Available for order, contact for lead time
Specifications
| Part Number (MPN) | 9X6620 |
| Product Name | NUT |
| Brand | CAT |
| Applicable Models | 3126B |
| Weight | 0.05 kg |
| Condition | New (Genuine CAT / OEM-equivalent direct replacement) |
| Warranty | 12 Months |
Where This Part Fits
Every row below is a real listing of 9X6620 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.
| Machine | System | Group No. | Manual Page |
| 3126B | AIR INLET AND EXHAUST SYSTEM | 199-6064 | p.438 |
| C27 | ELECTRICAL AND STARTING SYSTEM | 389-7402 | p.224 |
| C9 | AIR INLET AND EXHAUST SYSTEM | 260-3771 | p.130 |
| C27 | ELECTRICAL AND STARTING SYSTEM | 389-9736 | p.226 |
System Notes — AIR INLET AND EXHAUST SYSTEM
The air inlet and exhaust system covers the air cleaner housing and elements, intake piping, turbocharger, aftercooler, exhaust manifold, turbo mounting hardware and gaskets. It delivers clean, dense air and carries hot gas away. On this group, the two dominant failures are dust ingress and heat cycling: a leaking intake joint lets unfiltered air straight into the cylinders and dusts the rings in a few hundred hours, while exhaust manifold and turbo flange gaskets crack from repeated heat cycles and start whistling or sooting. Parts are replaced when boost drops, the intake tract shows dust trails past the filter, or a soot streak appears at a joint.
System Notes — ELECTRICAL AND STARTING SYSTEM
The electrical and starting system covers the battery, starter motor, alternator, wiring harness, relays, switches and the instrument panel. It carries current from the batteries to the starter to crank the engine, and from the alternator back to keep the batteries charged. Because these machines work in dust, vibration and wide temperature swings, connectors corrode, harness insulation chafes against the frame, and starter solenoids burn out from repeated short cranks. Parts in this group are usually replaced on a symptom basis — slow cranking, a dash warning, lights that dim under load, or a no-start condition traced to an open circuit.
FAQ
Is 9X6620 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 3126B.
Genuine CAT vs direct replacement — what is the difference?
Genuine CAT covers three factory lines: New Genuine, Cat Reman (core exchange with core charge) and Cat Classic (brand-new economy line). OEM-equivalent direct replacements are non-CAT parts; grade and warranty are confirmed in the quotation.
Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a warranty per quotation.
📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com
