Description

Caterpillar 941B Parts Catalog

If you have ever pulled a part off a machine, driven an hour to the dealer, and found out the box contains the wrong bearing or gasket, you know the waste. That stops when you have the factory parts book open on the bench. This Caterpillar 941B Parts Catalog is the original OEM publication – 466 pages of exploded views, part numbers, and cross-references that match the serial number plate on your Traxcavator. No guesswork, no returns, no down time waiting for the correct seal.

You get the same document the Caterpillar dealer uses to look up parts for the 941B (serial 70H4264-UP, engine 8V13472-UP). The index runs from Actuating Rod-Bucket Positioner (page 175) to Cutting Edge (pages 197-202). Every serviceable component on the machine is listed: Engine basic arrangement, Cooling system baffles and radiator, Fuel system and governor, Electrical system including alternators and circuit breakers. If you need to order a part, you use page 2 for the ordering instructions and the inside front cover quick reference chart.

Alphabetical Index: Finding What You Need

Page 3 contains the alphabetical index of groups. Look up “Brake Bands and Linings” – it points you to page 128. “Crankshaft Seal” – page 11. The index is the front door to the entire book. Without it, you would flip through 466 pages hunting for a part. With it, you find the illustration, read the caption, and write down the part number. That is the difference between a half-hour job and a three-hour scavenger hunt.

The index covers everything from Adapter-To Cylinder Block (page 71) to Cover-Valve Mechanism (page 16). It includes attachments like Bucket Positioner and ROPS mounting brackets. If it bolts to a 941B, the index has a line for it.

Does This Parts Catalog Cover the Engine?

Yes. The Basic Engine section starts at page 4 with the engine arrangement, then breaks down into components: balancer (page 13), camshaft (page 13), connecting rod and piston (page 12), crankshaft and bearings (pages 10-11). The 3304 engine serial number range is 8V13472-UP. Every part inside that block is illustrated with the factory Caterpillar part number. If you need a main bearing cap, the index sends you to page 9. If you need a crankshaft seal, page 11. You are not guessing which aftermarket catalog uses an obsolete supersession – this is the source.

7 Major Systems Documented

The Quick Reference Guide lists seven major systems: Basic Engine, Lubrication System, Cooling System, Intake and Exhaust System, Fuel System and Governor, Starting and Electrical System, and Power Train Power Transmission. Each system has its own set of group illustrations. For example, the Cooling System includes baffles-radiator (page 37) and bracket-fan drive (page 41). The Fuel System covers the base-fuel filter (page 69) and control-governor (page 54). The Electrical section covers alternators (19 and 50 amp), ammeter, batteries, battery cables, and circuit breakers. If you are rebuilding a harness or replacing a starter, you need the factory grouping to get the right cable length and terminal type.

Get the Right Part Number the First Time

Every illustration in this catalog has a caption that lists the part number and name. When more than one version exists (first type, second type), the caption tells you which serial number range each applies to. That is critical on a machine like the 941B that saw production changes. For instance, Brake Bands and Linings on page 128 may have a running change. The caption clarifies it. Do not rely on a third-party parts list that lumps all years together. Use the factory book and match the serial number.

Ordering instructions on page 2 state: specify quantity, part number, part name, and machine serial number. That is how you avoid the wrong part. The book also includes conversion equivalent tables (inside back cover) for inch-to-metric if you need to cross-check sizes.

Fuel System and Governor: Where the Parts Index Saves Hours

The fuel system section covers the base-fuel filter (page 69), governor control (page 54), and cap-fuel tank (page 74). If you are chasing a fuel leak and need the filter base gasket, you find it in the illustration labeled “Base-Fuel Filter” and order the correct O-ring. No draining the tank twice because the seal kit was for a different pump. The governor group includes the control linkage – if the throttle is hunting, you may need a new spring or rod end. The parts catalog shows every piece in the assembly.

OEM Parts Catalog vs Aftermarket: The Difference

Aftermarket parts books often reprint illustrations from different models or omit attachments. This is the original Caterpillar publication from August 1981, revision ST. It covers the exact serial numbers. The index is exhaustive – from “Cable-Starting Motor Ground” to “Counterweights” and “Cover-Hydraulic Control.” If you are working on a 941B with a multi-purpose bucket, the bucket section (page 201) lists the cutting edges and cylinder mounts. The aftermarket books leave that out. For a professional shop, the OEM catalog pays for itself the first time you avoid a wrong order.

Related manuals you might need: Caterpillar C15 2006 Parts Catalog – Factory OEM 884 Pages for your heavy truck work, or Caterpillar Elevated Sprocket Tractors Parts Catalog – 971 Pages for larger track machines. And if you are rebuilding the undercarriage, Caterpillar Undercarriage Parts Catalog – 866 Pages OEM covers track rollers, idlers, and sprockets in detail.

Understanding how parts catalogs fit into the broader Automotive Industry Overview helps, but nothing beats the actual factory document. For more on the evolution of construction equipment manuals, see Automotive Industry Overview.

Frequently Asked Questions

How do I find the part number for a specific component?

Use the alphabetical index on page 3. Find the component name, note the page number, then turn to that illustration. The caption below the drawing lists the part number and name. Cross-check the serial number range if multiple types are shown.

Does this catalog cover the 3304 engine?

Yes. The engine serial number range is 8V13472-UP. The Basic Engine section (pages 4-16) covers all internal parts, including camshaft, crankshaft, bearings, and piston assembly.

Are torque specifications included in this parts catalog?

No. This is a parts catalog, not a service manual. It provides part numbers and illustrations only. For torque values and repair procedures, you need the factory service manual for the 941B.

What serial numbers does this parts book cover?

Machine serial 70H4264-UP and engine serial 8V13472-UP. The revision was published August 1981. If your machine falls within these ranges, this is the correct catalog.

You have the machine. You have the serial number. Now get the part numbers right. Access the Factory Manual and keep it on your shop tablet or print the pages you need. The 466 pages will save you more time than any aftermarket website ever could.