Bobcat E20 Mini Excavator: Step-by-Step Maintenance Guide

Bobcat E20 maintenance follows the interval-based schedule Bobcat publishes for the compact excavator line: daily greasing of every boom, arm, bucket, and blade pivot point, engine oil and filter replacement at 250 hours, hydraulic and fuel filters at 500 hours, and a full annual service with a hydraulic fluid change at 1,000 hours. The E20 is a 1.9-metric-ton next-generation machine that replaced the older E17 in the small mini-excavator slot with 24 percent more arm digging force and 26 percent more lifting capacity.

This guide walks the full E20 service schedule with system-by-system procedures, the specific fluid and filter answers operators actually search for, and where the dealer adds value over DIY. Use it as a working checklist while you service your machine. Browse aftermarket Bobcat E20 parts while you read if you need to source filters, seals, glass, bushings, or cab hardware before your next service window.

At a Glance

• Machine class: 1.9-metric-ton compact mini excavator, next-generation E-Series, replaces the older E17 in the 1.7T slot
• Daily service (every 8 to 10 operating hours): grease all pivot points (boom, arm, bucket, blade, hydraulic clamp), check fluids, walk-around inspection, verify safety systems
• 250-hour service: engine oil and oil filter replacement
• 500-hour service: hydraulic filter, fuel filter, air filter, cooling system inspection
• 1,000-hour and annual service: hydraulic fluid change, all major filters, full inspection of cylinders, hoses, undercarriage
• Owner difficulty: Daily and 250-hr service are owner-operator friendly. The 1,000-hr benefits from a dealer or trained tech for hydraulic system work

What's the difference between the Bobcat E17 and E20?

This is the question searchers ask before buying parts, because most aftermarket part numbers cross between the two machines and most do not. The E17 is the smaller 1.7-metric-ton model, designed as a value-tier entry point with premium features at a lower price. The E20 is the next-generation 1.9-metric-ton machine that replaced the previous-generation small excavator with 24 percent more arm digging force and 26 percent more lifting capacity over the blade than its predecessor.

For maintenance and parts purposes, the practical implications are:

• Cab and operator-station components: Many cross-fit between the E17 and E20. Door glass, seals, and cab hardware are often shared.
• Engine and air filtration: Largely shared at this displacement class. The fuel filter with water separator is common across Bobcat compact equipment.
• Hydraulic system: The E20's higher digging and lifting forces come from a different hydraulic pump sizing. Hydraulic filters and some hose assemblies are not interchangeable. Always verify by serial number.
• Undercarriage: Different size class. Rubber tracks, idlers, and rollers are not shared between the E17 and E20.

If you operate both an E17 and an E20, stock cab and engine service items as shared inventory, but treat hydraulics and undercarriage as machine-specific. The same fitment principle applies if you operate the E20 alongside other E-Series mini excavators like the E26, E32, or E35.

What does daily Bobcat E20 maintenance include?

Daily service runs every 8 to 10 operating hours. Bobcat's published schedule for the compact excavator line groups daily tasks into greasing, fluid checks, and a safety walk-around. The goal is to catch leaks, loose hardware, and damaged hoses before they turn into a downtime event mid-job.

• Greasing: Grease all pivot points on the boom, arm, bucket, and dozer blade. If your E20 is equipped with a hydraulic clamp (thumb), grease those pivot points too. Use a lithium-complex NLGI 2 EP grease.
• Fluid checks: Verify engine oil on the dipstick, hydraulic fluid level in the sight gauge, and coolant level in the overflow bottle. Top up to spec if low.
• Drain the fuel filter water separator: Open the drain valve and let any accumulated water drain from the bowl before starting the engine.
• Walk-around safety inspection: Check for loose hardware, damaged hydraulic hoses, fluid leaks, cracked or damaged structural components. Verify the seat belt latches, the motion alarm works, and all operator controls respond properly.
• Clean coolers and air intake: Remove debris from the radiator, oil cooler, and air conditioning condenser (if equipped) using compressed air from the inside of the cooler stack outward. Mini-excavators work in dust-heavy environments and cooler fouling is the leading cause of summer overheating.
• Track and undercarriage check: Remove packed mud, soil, and rocks from the track frames and around the drive motors. Look for cuts or chunking on the rubber tracks.

The whole daily check runs 10 to 15 minutes once the layout is familiar. Skipping it costs more time over a season than doing it costs over a year.

How much oil does a Bobcat E20 take?

Engine oil capacity for the Bobcat E20 is published in the operator's manual that came with your machine, and the exact figure can vary slightly by serial range and engine variant. The compact-excavator-class engine in this displacement bracket typically takes a few quarts of oil. Always confirm the capacity for your specific serial number against the operator's manual or by calling the parts counter with your serial number.

For viscosity, Bobcat specifies a multi-grade engine oil meeting their published API spec for the engine. The owner's manual lists the recommended viscosity grade by ambient temperature range. Use the grade specified for the climate where the machine operates. If you operate in extreme cold or extreme heat for portions of the year, follow the seasonal viscosity guidance in the manual rather than running a single grade year-round.

Whatever the exact capacity, the change interval is 250 hours under standard operating conditions. Severe-duty operation (high dust, high temperature, heavy cycle loading) tightens that to the 100-hour interval if the operator's manual specifies a severe-duty schedule. Always run to the published interval, not by appearance or smell of the oil.

What kind of hydraulic fluid does the Bobcat E20 take?

Bobcat specifies their published hydraulic fluid spec for the E20. Bobcat-branded hydraulic oil meets the spec and is the easiest choice if you can source it from a dealer. Acceptable equivalent fluids are major-brand commercial hydraulic oils that explicitly meet or exceed Bobcat's published spec for the compact excavator line. Cross-reference the spec sheet on any candidate fluid against Bobcat's requirement before using it.

The most important rule with hydraulic fluid is do not mix incompatible fluids. Mixing different fluid types can cause foaming, additive degradation, and seal damage. If you switch hydraulic fluid brands or types, drain the system completely before refilling, do not just top up. The 1,000-hour or annual service is the appropriate time to switch fluid types if you choose to switch.

Check the sight gauge daily. Hydraulic fluid that looks milky or cloudy indicates water contamination, usually from condensation in a partially-empty reservoir during seasonal storage. Drain and replace if you see water contamination. Hydraulic fluid that looks dark or burnt indicates excess heat exposure and should be replaced regardless of hour interval.

What's the Bobcat E20 service schedule by hour interval?

This is the consolidated schedule for the E20 under standard operating conditions. Severe-duty operation tightens every interval. The same general schedule applies across the small E-Series mini-excavator class with model-specific differences in fluid capacities.

Interval	Service
Daily (8 to 10 hrs)	Greasing of all pivot points, fluid level checks, walk-around inspection, cooler and air-intake cleaning, fuel-water filter drain, track condition check
50 hrs	Inspect hydraulic hoses and tube lines for chafing or leaks, check track tension, verify alternator and fan belt condition
100 hrs	Clean and tighten battery terminals, inspect battery condition. For severe-duty operation, change engine oil and filter at this interval.
250 hrs	Engine oil and oil filter replacement (standard duty), inspect all attachment hardware
500 hrs	Hydraulic filter, fuel filter, air filter (or check and clean), coolant condition inspection
1,000 hrs or annually	Hydraulic fluid drain and refill, all major filter replacements, coolant flush and refill, full inspection of cylinders, hoses, undercarriage, and electrical
2,000 hrs	Final drive (drive motor) inspection and oil change if specified, comprehensive condition assessment

The 250-hour and 500-hour services are where most owner-operators do their own work. The 1,000-hour service involves draining and refilling the hydraulic system, which is messier and requires clean fluid handling. Many E20 owners bring the machine to a dealer or qualified independent shop for the annual 1,000-hour and handle the 250-hour and 500-hour services themselves.

How do you grease a Bobcat E20 properly?

Daily greasing on a mini excavator covers more pivot points than a skid steer because the boom, arm, bucket, and dozer blade all have multiple grease fittings. Plan on around a dozen primary fittings on the bare machine, plus more if you have a hydraulic clamp or quick-coupler attachment. Find them all before you start, work in the same order each day, and nothing gets missed.

1. Park on level ground and rest the bucket flat on the ground. Lower the dozer blade to the ground as well. This relieves load on the cylinder ends and lets fresh grease push out the old grease properly.
2. Wipe each grease fitting clean before connecting the grease gun. Dirt pressed into a fitting goes straight to the bushing surface and grinds it. A clean rag and 10 seconds per fitting is enough.
3. Pump grease until clean grease emerges from the joint. Two to three pumps is typical for an undamaged pivot. If you have to pump more than five or six times before clean grease appears, the joint is dry, contaminated, or worn and should be inspected.
4. Wipe the excess grease off the fitting and the surrounding area. Leftover grease attracts dirt and forms an abrasive paste that wears the seal.
5. Work through every fitting in order: dozer blade pivots, boom-to-house pivot, boom cylinder ends, boom-to-arm pivot, arm cylinder ends, arm-to-bucket linkage pivots, bucket cylinder ends, bucket pin, hydraulic clamp pivots if equipped, swing post pivot.

Use a lithium-complex NLGI 2 EP grease rated for the temperatures you operate in. Bobcat-branded grease meets the spec, and most major brand commercial-grade EP greases of the same designation are acceptable equivalents. Do not mix grease types on the same fitting. If you switch grease brands, push enough new grease through to displace the old grease completely.

The most common greasing mistakes on mini excavators are over-greasing (pumping until the gun stops, which blows the seal) and skipping the dozer blade pivots (which wear faster than operators expect because they take ground shock on every grading pass). Both fail the same component but cost different amounts to fix.

How do you change the engine oil and filter on a Bobcat E20?

The 250-hour engine oil change is the most common owner service on the E20. Plan on about 45 minutes the first time, less once you know the layout. You will need new engine oil to Bobcat specification (consult your operator's manual for capacity and viscosity), a new oil filter, a drain pan, an oil filter wrench, basic hand tools, and rags. Bring the engine up to operating temperature first so the oil drains cleanly.

1. Park the machine on level ground. Rest the bucket and dozer blade flat on the ground. Engage the parking brake. Shut down the engine.
2. Open the engine access panel according to your operator's manual. Mini excavators have tighter engine access than skid steers, and getting the panel positioning right saves time on every subsequent step.
3. Position the drain pan under the engine oil drain. The pan needs to be sized for the oil capacity of your machine. Confirm capacity in your operator's manual.
4. Remove the drain plug and let the oil drain completely. Hot oil drains faster and carries more contaminants out with it. Be careful, the oil and drain plug will be hot.
5. Clean and reinstall the drain plug with a new sealing washer if one is specified. Torque to spec. Do not overtighten.
6. Remove the old oil filter using the filter wrench. Drain residual oil from the filter into the pan, then dispose of the filter properly.
7. Apply a thin film of fresh oil to the new filter's rubber gasket. Hand-tighten the new filter, then turn an additional three-fourths of a turn beyond contact. Do not use the wrench to install.
8. Refill the engine with the specified oil through the fill port. Use the capacity listed in your operator's manual. Wait two to three minutes for the oil to settle, then check the dipstick.
9. Start the engine and run for 30 to 60 seconds. Check for leaks around the drain plug and filter. Shut down and recheck the oil level. Top up if needed.
10. Reset the service interval indicator if your E20 is equipped with one. Record the service in your maintenance log.

Cross-reference your oil filter to a quality aftermarket equivalent using the part number from the old filter. Our Bobcat oil filter cross-reference guide walks through how to verify the right aftermarket filter for your machine. Used oil and filters need to be disposed of according to local environmental regulations.

When do you replace the hydraulic, fuel, and air filters on the E20?

The 500-hour service consolidates the major filter replacements. Bobcat groups the hydraulic filter, the fuel filter with water separator, and the air filter into this interval. Each filter has its own failure signature if you let it go too long.

• Hydraulic filter: Replace at 500 hours. Symptoms of an overdue hydraulic filter on a mini excavator include slow boom or arm response, hydraulic system overheating, and unusual pump noise. Our published guide on when to replace a Bobcat hydraulic filter covers failure modes and what causes premature filter loading.
• Fuel filter and water separator: Replace at 500 hours. Drain the water separator at every daily check. Symptoms of an overdue fuel filter include hard starting, loss of power under load, and fuel system warning lights. Our Bobcat fuel filter change guide covers the procedure.
• Air filter: Inspect at every 50-hour service. Replace at 500 hours, or sooner if you work in dusty conditions. Bobcat recommends never cleaning a primary air filter, as this damages the filter media and lets dust through to the engine. Browse aftermarket Bobcat air filters when you need a replacement.

Always cross-reference filter part numbers to confirm the right replacement for your serial number. Bobcat occasionally revises filter specifications during a production run, and the part that fit an early-production E20 may not be exactly the part that fits a later one. When in doubt, contact our parts specialists at sales@partsonline.com with your serial number and we will confirm the right filter for your machine.

How often should you service the Bobcat E20?

The short answer is: follow the schedule above. The interval-based service framework Bobcat publishes for the compact excavator line is the right answer for warranty protection, machine life, and resale value. Every 250 hours change the engine oil and filter, every 500 hours replace fuel filters and check the cooling system, annually or every 1,000 hours carry out a full inspection and replace major filters.

The longer answer is that hour intervals are a baseline, and your actual service frequency should account for operating conditions:

• Severe-duty operation (continuous dust exposure, high-temperature work, heavy-cycle loading) compresses intervals. Engine oil at 100 hours instead of 250. Air filter checked at 25 hours instead of 50.
• Seasonal use (machine sits for months at a time) means an annual service is the controlling interval regardless of hours. Old engine oil oxidizes in storage. Hydraulic fluid absorbs moisture. Coolant degrades. Don't let calendar time pass without service just because the hour meter is low.
• Heavy startup conditions (frequent cold starts in winter operation) accelerate wear and warrant tighter oil change intervals.

Whatever the operating profile, log the hours and the date at every service. A maintenance log on a mini excavator is also a resale value document. Buyers pay more for a documented service history than for the same machine with the same hours and no records.

What E20 parts wear fastest in normal mini-excavator service?

The mechanical maintenance schedule above is what keeps the powertrain alive. The cab, undercarriage, and attachment-end parts are where wear shows up first in a way operators actually notice. A handful of E20 service parts move at higher volume across our catalog than the rest.

• Cab door seals: Door seal degradation is the most common cab service item on the E-Series mini excavators. Symptoms are increased cab noise and dust ingress. Browse aftermarket Bobcat seals for door and window applications.
• Door glass and cab glass: Mini-excavators work in environments where flying debris is routine. Cab glass cracks from impact or thermal stress. Browse aftermarket Bobcat door glass when replacement is needed.
• Pivot bushings: Boom, arm, and bucket pivot bushings wear with hours and grease quality. Bushing replacement comes due before the bushing fails completely, signaled by play at the joint that grease cannot eliminate. Browse aftermarket Bobcat bushings.
• Hydraulic hoses: High-pressure hoses on the boom and arm chafe over time, especially at the routing transitions between the boom and the dozer blade circuit. Inspect at every 50-hour service.
• Bucket teeth and pins: Standard wear items on any excavator bucket. Replacement frequency depends on bucket use, material being dug, and operator technique. Stock a spare set if you do significant digging work.
• Air filter and engine oil filter: Routine 250-hour and 500-hour service items. Stocking one of each on the shelf prevents a service-interval-due day from turning into a parts-delivery-wait day.

Stocking one set of door seals, one cab glass, a couple of fresh grease cartridges, and one of each major filter is the simplest spare inventory for an active E20. Browse aftermarket Bobcat E20 parts to see the full catalog of common service items, or browse aftermarket Bobcat mini excavator parts for cross-fit items that work across the E-Series.

Frequently Asked Questions

How much oil does a Bobcat E20 take?

Engine oil capacity is published in the operator's manual for your specific serial number. The compact-excavator-class engine in this displacement bracket takes a few quarts of oil. Confirm the exact capacity by checking your operator's manual or by calling the parts counter with your serial number. The change interval is 250 hours under standard operating conditions, tightened to 100 hours under severe-duty.

What is the difference between E17 and E20?

The 1.7-metric-ton E17 is the smaller value-tier model designed for all skill levels at a lower price point. The 1.9-metric-ton E20 is the next-generation model with 24 percent more arm digging force and 26 percent more lifting capacity over the blade than its predecessor. For parts, cab and engine service items often cross-fit between the two, but hydraulic and undercarriage components are sized differently and are not interchangeable.

How often should I service my Bobcat?

Bobcat publishes an interval-based service schedule for the compact excavator line. Every 250 hours change the engine oil and filter and inspect hydraulics. Every 500 hours replace fuel filters and check the cooling system. Annually or every 1,000 hours carry out a full inspection, replace major filters, and service critical components including a hydraulic fluid change.

What kind of hydraulic fluid does a Bobcat E20 take?

Bobcat specifies their published hydraulic fluid spec for the E20. Bobcat-branded hydraulic oil meets the spec. Acceptable equivalents are major-brand commercial hydraulic oils that explicitly meet or exceed Bobcat's spec for the compact excavator line. Cross-reference any candidate fluid against Bobcat's requirement before using it. Never mix incompatible fluid types in the same system.

Can I use synthetic oil in my Bobcat E20?

Synthetic engine oil is acceptable in the E20 as long as it meets Bobcat's published API spec and viscosity grade. Follow Bobcat's published service intervals regardless of oil type. Synthetic does not extend the published interval. Service intervals are based on combined wear factors including filter capacity and fuel system contribution, not oil chemistry alone.

Where can I download the Bobcat E20 service manual?

The owner's manual that came with the machine is the free reference for routine service intervals and operator-level procedures, and is available from Bobcat dealers if yours has been lost. The full service manual is a separate paid document that covers diagnostic procedures, torque specifications, and component-level repair information. Contact a Bobcat dealer or Bobcat parts literature directly to order the full service manual for your serial number.

Need help finding the right service parts for your E20? Browse aftermarket Bobcat E20 parts for filters, seals, glass, bushings, and cab hardware. For fitment verification on your specific serial number, contact our parts specialists at sales@partsonline.com with your machine's model and serial number. It is the customer's responsibility to verify part compatibility before purchasing.