PM schedule · Backhoe loader
Cat 420 maintenance schedule
Service intervals, fluids and filters for the Cat 420. Full specs, part numbers and heavy-duty intervals are in goAardvark.
- Series 07 (Tier 4 Final / Stage V)
- Engine Cat C3.6
- Emissions Tier 4 Final, Stage V
- Size class 90–110 hp
Source: Cat Backhoe Loader 415-450 Parts Reference Guide (cat.com) · Last verified October 29, 2026 · Always confirm with the operator's manual for your serial number
What's due next?
Enter the hour meter (SMU) reading to see what's coming up.
3,000 hr service
Includes 1,500 hr, 1,000 hr, 500 hr
at 3,000In 160 hr500 hr service
at 3,500In 660 hr1,000 hr service
Includes 500 hr
at 4,000In 1,160 hr1,500 hr service
Includes 500 hr
at 4,500In 1,660 hr
Shows the next four service stops. Red means due within 50 hours; amber, within 250. goAardvark tracks this automatically from telematics hours, across every make in your fleet.
The short answer
Service intervals
Pick an interval. Each service includes everything from the shorter intervals that fall on the same hour.
Every 500 hours
0 of 5 doneFluids and capacities 3 of 12 shown
| System | Spec | Capacity |
|---|---|---|
| Engine oil (with filter) | — | 9 L2.4 gal |
| Hydraulic tank | — | 42 L11.1 gal |
| Fuel tank | — | 160 L42.3 gal |
| Hydraulic system | Available in goAardvark | Available in goAardvark |
| Transmission, power shuttle (AWD) | Available in goAardvark | Available in goAardvark |
| Transmission, power shift (AWD) | Available in goAardvark | Available in goAardvark |
| Rear axle | Available in goAardvark | Available in goAardvark |
| Rear axle planetaries | Available in goAardvark | Available in goAardvark |
| Front axle (AWD) | Available in goAardvark | Available in goAardvark |
| Front axle planetaries (AWD) | Available in goAardvark | Available in goAardvark |
| Cooling system (with A/C) | Available in goAardvark | Available in goAardvark |
| DEF tank | Available in goAardvark | Available in goAardvark |
9 more systems with specs and capacities are in goAardvark.
Unlock full specsFilters 2 of 8 shown
| Filter | Part number | Change at |
|---|---|---|
| Engine oil filter | Available in goAardvark | 500 hr |
| Hydraulic filter | Available in goAardvark | 1,000 hr |
| Fuel filter | Available in goAardvark | Available in goAardvark |
| Engine air filter | Available in goAardvark | Available in goAardvark |
| Cab air filter | Available in goAardvark | Available in goAardvark |
| Transmission filter | Available in goAardvark | Available in goAardvark |
| Engine crankcase breather | Available in goAardvark | Available in goAardvark |
| DEF filter | Available in goAardvark | Available in goAardvark |
All 8 filters with part numbers are in goAardvark.
Unlock full specsFleet PM snapshot
Add up to 5 machines to see when each one hits its next service. This is free and needs no sign-up.
| Machine | Hours now | Hours per week | Next service | Around | |
|---|---|---|---|---|---|
3,000 hr at 3,000 160 hr | Dec 8 |
Official Cat maintenance resources
Cat SIS2GO app
Mobile app with free Operation and Maintenance Manuals and parts information; service manuals need a subscription.
Cat parts and service manuals
Explains how to get Cat Operation and Maintenance Manuals digitally, in print, or through a dealer.
Cat S·O·S fluid analysis
Oil, coolant and fuel sampling program run through Cat dealers to catch problems before failure.
Cat Inspect
Mobile app for completing and sharing machine inspections, linked with VisionLink.
Cat Planned Maintenance Self-Service Option
Explains Cat PM kits for 250, 500, 1,000 and 2,000 hour services and what they include.
Parts.cat.com PM kits and self-service options
Order planned maintenance kits and parts by machine model and serial number.
Cat Parts Reference Guides
Model-family guides listing maintenance part numbers by service interval.
Cat VisionLink
Telematics platform for tracking machine health, hours and maintenance across a fleet.
Cat Customer Value Agreements
Dealer-set maintenance and repair plans tailored to how you run your machines.
Cat Equipment Protection Plans
Extended parts and labor coverage beyond the standard warranty, sold through Cat Financial.
Cat backhoe loader 415-450 parts reference guide
Cat guide listing maintenance items by interval for 415 to 450 backhoe loaders.
Your 420 isn't the only machine due for service
Most fleets run several makes side by side. Each has its own manual, intervals and telematics portal. goAardvark pulls hours from all of them and builds one PM schedule for the whole fleet.
Compare similar backhoe loaders
Frequently asked questions
Sources
- Cat Backhoe Loader 415-450 Parts Reference Guide (cat.com)
- Cat 420 product page and specifications (catfinancial.com mirror of cat.com)
Cat and other product names are trademarks of their owners. goAardvark is not affiliated with any equipment manufacturer. This page summarizes public information for planning; your operator's manual is the authority for your serial number.