Description

Bobcat 435, 435AG 2004 Parts Catalog

You ever order a filter for a 435, get it in hand, and realize the thread pitch is off by half a millimeter? I have. That’s what happens when you guess part numbers off a generic website or a faded sticker. This 361-page factory catalog kills that guesswork. Every part number is cross-referenced to the serial number range Bobcat 435, 435AG 2004 Parts Catalog covers — from S/N 5631 11001 & Above. If your machine falls in that range, the numbers on these pages match what came off the assembly line. No aftermarket substitutions, no “this might fit” nonsense.

Bobcat 435 and 435AG Parts Catalog: What’s Inside

The book opens with a full layout of maintenance items – engine oil filters, fuel elements, hydraulic filters, and fluid capacities. Page 3 shows you the exact part numbers for the 6675517 engine oil filter (6-pack), the 6667352 fuel element, and the 6661248 hydraulic element. You also get the factory-recommended motor oil grades: 15W40, 10W30, and straight 30-weight, all in quarts, gallons, or 2.5-gallon containers. The hydraulic fluid comes in 2.5, 5, and 55-gallon drums – part numbers 6903117, 6903118, and 6903119. No guessing which viscosity Bobcat specified.

Maintenance Items: Engine Oil, Filters, and Fluids

If you are doing the 50-hour service, you need the correct oil filter and the right amount of 10W30. Page 5 lists the 6675517 filter and the 6903108 motor oil (1 gallon) as the standard kit. But the catalog also shows alternative viscosities depending on your operating temperature. That kind of detail keeps you from running heavy oil in a cold-start environment and killing the hydraulic pump. The parts catalog won’t tell you how to install it – that’s the service manual – but it gives you the exact consumable parts to order. Pair it with a Bobcat 435 Compact Excavator 2008 Service Manual – Section: Fuel Level Sender or a Bobcat 435 Compact Excavator Service Manual – Section: Fuel Level Sender if you need the service procedures.

50-Hour Service Schedule: What You Need

The 50-hour schedule on page 5 is sparse but critical. It calls out the engine oil filter, the motor oil (10W30 or 15W40), and the hydraulic element. A lot of guys skip the hydraulic filter at 50 hours because they think it’s too soon. Bobcat put it in the schedule for a reason – break-in metal fines. Run without that filter change and you’ll be replacing a pump sooner than you planned. The catalog lists the 6661248 element and the 6681012 inline filter. Order both. Your hydraulic system will thank you.

How to Verify Your Serial Number Range

Before you buy this catalog, check your machine’s S/N. This edition covers S/N 5631 11001 & above for the 435AG series. If your serial is below that, you need a different revision. The manual explicitly states the serial range on the cover. I’ve seen guys buy a parts catalog blind, then find out their machine is two digits off and half the numbers don’t cross. Don’t be that guy. Verify the serial, then pull the trigger.

OEM Part Numbers vs. Aftermarket Substitutes

Aftermarket parts catalogs try to cross-reference Bobcat numbers, but they often miss revisions. For example, the 6675517 engine oil filter has a specific bypass valve setting and thread. An aftermarket cross might give you a filter that fits the thread but flows less oil. The factory catalog eliminates that risk because every number is Bobcat’s own. If you prefer aftermarket, you can still use this catalog to find the OEM number, then cross it yourself with a reliable source like the Automotive Industry Overview. But for peace of mind, stick with the factory part.

Get the Right Filter Element the First Time

Air filter elements – primary and inner – have separate part numbers. The catalog lists 6666376 for the primary and 6666377 for the inner. Mix them up and you either choke the engine or leave a gap that lets dirt through. The exploded diagrams in this catalog (not shown in the OCR but standard in the full PDF) show you exactly which element goes where. One order, one delivery, no returns.

If you’re working on a different Bobcat model, check out the Bobcat T3571, T3571L 2005 Parts Catalog – OEM Factory Specs for telehandlers, or refer to the Automotive Industry Overview for broader context on construction equipment documentation.

Frequently Asked Questions

Does this parts catalog include torque specs for assembly?

No. This is a parts catalog, not a service manual. For torque values and service procedures, you need the separate service manual.

Can I use this catalog for a 2008 Bobcat 435?

The 2004 catalog covers machines up to that year and serial range. The 2008 model likely has revisions. Bobcat issued updated parts lists for later serial breaks. Check your S/N; if it falls within 5631 11001 & above, the catalog applies. Otherwise, look for a later edition. The part numbers for filters may carry over, but structural parts like boom cylinders or undercarriage components could change. Always start with your machine’s serial number, then verify against the manual’s stated range. I’ve seen a 2005 machine use the same hydraulic filter as a 2004, but the fuel sender assembly changed. Without the correct catalog, you’ll order a part that doesn’t mate to the wiring harness.

What is the difference between the 435 and 435AG models?

The AG series is the agricultural variant – typically different hydraulics, auxiliary lines, and undercarriage options. The parts catalog covers both but separates them by serial range and remarks columns. Pay attention to the “Remarks” field on each page; it flags which model uses each part.

Is the 435AG covered in the same book?

Yes, the manual title includes both 435 and 435AG. All part listings apply to the AG series unless otherwise noted.

You need the right part numbers the first time. That’s what a factory catalog does. Stop chasing dead ends with generic cross-reference charts. Access the Factory Manual and get back to wrenching.