Bobcat T770 Parts and Maintenance Guide

The Bobcat T770 compact track loader is one of the best-selling CTLs in the Bobcat lineup, powered by a 92hp engine with a vertical lift path and pressurized cab. A preventive maintenance schedule protects your T770 investment by catching wear items before they fail. Bobcat's service manual outlines service milestones at 250, 500, and 1,000 hours, plus track-specific maintenance that is unique to CTLs.

At a Glance

• Machine type: Large-frame compact track loader, 92hp, vertical lift, pressurized cab
• Service intervals: 250 hours (oil and filters), 500 hours (hydraulic and fuel filters), 1,000 hours (fluid changes, undercarriage inspection)
• Track maintenance: Rubber tracks last 1,000-2,000 hours depending on terrain and application. Proper tension extends track life significantly
• Parts availability: Aftermarket T770 parts widely available at 20-60% savings vs. dealer pricing

What Maintenance Schedule Should I Follow for My Bobcat T770?

The T770's maintenance schedule follows the same interval structure as other Bobcat machines, with additional items specific to the tracked undercarriage. Here is the complete service timeline:

Interval	Service Items
Daily	Check fluid levels (oil, hydraulic, coolant), inspect tracks for debris and damage, check track tension visually
Every 250 hours	Engine oil and filter change, grease all fittings, inspect air filter, check drive sprocket wear
Every 500 hours	Hydraulic filter, fuel filter, air filter replacement, measure track tension, inspect rollers and idlers
Every 1,000 hours	Hydraulic fluid change, coolant replacement, full undercarriage assessment, inspect all hoses and cylinders

According to Bobcat's operator manual, daily track inspection is not optional on CTLs. Debris wrapped around the undercarriage accelerates wear on rollers, sprockets, and the tracks themselves. Clearing debris takes two minutes and can save thousands in premature undercarriage replacement.

What Bobcat T770 Parts Need Replacing at 250 Hours?

The 250-hour service focuses on engine protection and lubrication, plus a visual check of track-specific components:

• Engine oil and filter: The T770's 92hp engine demands clean oil to protect under heavy load conditions typical of CTL work. Change both at every 250-hour service
• Grease fittings: The T770 has multiple grease points on the loader arms, tilt cylinder pins, and idler adjusters. Greasing prevents metal-on-metal wear at high-stress pivot points
• Air filter inspection: CTLs operate closer to the ground than skid steers, which means more dust ingestion. Check the outer air filter element and clean or replace if restricted
• Drive sprocket check: Inspect the drive sprocket teeth for wear, chipping, or uneven patterns that indicate track misalignment

What Additional T770 Service Items Are Due at 500 and 1,000 Hours?

The 500-hour service expands to include the hydraulic and fuel filtration systems. The 1,000-hour service is a comprehensive checkup of the entire machine.

At 500 hours:

• Hydraulic filter: The T770's hydraulic system powers the tracks, loader, and auxiliary hydraulics simultaneously. Protect the pump by replacing the filter on schedule
• Fuel filter: Pre-fill the new filter with clean diesel and prime the fuel system after installation to prevent air lock
• Air filter elements: Replace both the outer (primary) and inner (safety) air filter elements
• Track tension measurement: Use the measurement procedure in the operator's manual. Tracks that are too tight accelerate sprocket and idler wear. Tracks that are too loose risk de-tracking

At 1,000 hours:

• Hydraulic fluid change: Replace the full volume of hydraulic fluid with the specification listed in the operator's manual
• Coolant replacement: Flush and refill the cooling system
• Full undercarriage assessment: Measure roller, idler, and sprocket wear against the service limits in the manual. Replace any components near or beyond the wear limit
• Hose and cylinder inspection: Check every hydraulic hose for chafing, cracking, or bulging. Inspect cylinder rods for scoring or seal weeping

Browse our Bobcat T770 parts collection for filter kits, undercarriage components, and maintenance items.

How Often Do T770 Rubber Tracks Need Replacing?

Rubber track life on the T770 varies widely based on operating conditions, but typical replacement intervals fall between 1,000 and 2,000 hours of operation.

Factors that shorten track life:

• Hard surfaces: Operating primarily on concrete, asphalt, or rocky terrain wears tracks faster than soft soil
• Sharp turns: Counter-rotating (spinning in place) scrubs the track edges and accelerates wear. Use gradual turns when possible
• Debris accumulation: Rocks, rebar, and root material trapped in the undercarriage grind against rollers and the track interior
• Incorrect tension: Both over-tight and too-loose tracks cause accelerated wear on different components

Signs that tracks need replacement: visible steel cords through the rubber, chunks of rubber missing from the tread, excessive track slack that tension adjustment cannot correct, or cracking across the track surface.

From our experience serving equipment owners across North America, maintaining proper track tension and clearing debris daily are the two most impactful things you can do to extend track life on the T770.

What Filters Does the Bobcat T770 Use?

The T770 uses a full suite of filters similar to other M-series Bobcat machines, with specifications sized for its larger 92hp engine platform:

Filter Type	Purpose	Change Interval
Engine oil filter	Removes contaminants from engine oil	Every 250 hours
Hydraulic filter	Protects hydraulic pump and cylinders	Every 500 hours
Fuel filter/water separator	Removes water and sediment from diesel	Every 500 hours
Outer air filter (primary)	First-stage intake air filtration	Every 500 hours (sooner in dust)
Inner air filter (safety)	Backup filtration	Every other outer filter change
Cabin air filter	Filters air entering the pressurized cab	As needed (varies by environment)

The T770 also has a cabin air filter that keeps the pressurized cab interior clean. In dusty environments, this filter should be checked more frequently than the engine filters.

Which T770 Hydraulic Components Need Regular Service?

The T770's hydraulic system works harder than most skid steer systems because it powers both the loader functions and the track drive motors simultaneously. This dual demand means hydraulic components are under constant load.

• Hydraulic hoses: Inspect all hoses at every service interval. Pay special attention to hoses routed near the undercarriage where they can contact track components
• Cylinder seals: Check lift and tilt cylinders for oil weeping around the rod. Minor seeping is normal, but dripping indicates seal replacement is needed
• Hydraulic pump: Listen for unusual whining or cavitation noise. Changes in pump sound often precede failure
• Track drive motors: Unique to CTLs. These motors are sealed units but should be checked for leaks and proper operation. Uneven track speed or wandering travel indicates a drive motor issue

What Undercarriage Parts Should I Monitor on My T770?

The undercarriage is the highest-cost maintenance area on any compact track loader. The T770's undercarriage consists of:

• Rubber tracks: The most visible wear item. Inspect tread depth, edge condition, and check for exposed steel cords
• Drive sprockets: The toothed wheels that engage the track. Worn sprocket teeth cause the track to skip and accelerate wear on both components
• Front idlers: Guide the track at the front of the machine. Check for wobble, bearing noise, and seal leaks
• Bottom rollers: Support the machine's weight on the tracks. Worn rollers allow the track to sag and contact the frame
• Track tension springs: Maintain consistent track tension as the track stretches. Check for proper tension at every 500-hour service

Browse our Bobcat compact track loader parts collection for undercarriage components, track hardware, and sprockets.

What Door Glass and Cab Parts Does the T770 Need?

The T770 uses the M-series pressurized cab shared with other current Bobcat skid steers and CTLs. Key cab parts:

• Front door glass: OEM 7120401 (flat, tempered). Most commonly replaced cab component due to debris impact
• Pressurized door seal: OEM 7281063. Inspect whenever you replace the door glass
• Wiper arm: OEM 7251263
• Wiper blade: OEM 7251264

Browse our Bobcat door glass collection for cab glass and seal components.

Are T770 Parts Interchangeable with T750 or T650 Parts?

The T770 shares components with several other Bobcat CTLs and skid steers in the same platform family:

• T750: The radial-lift version of the same frame size. Many engine, hydraulic, and cab parts are shared
• T650: One step smaller in frame size. Some cab components and filters overlap, but undercarriage dimensions differ
• S770: The wheeled skid steer equivalent. Shares the same engine and many hydraulic components, but the undercarriage and drive system are entirely different
• M-series cab: Door glass, seals, and wiper components are shared across the M-series platform

Always verify interchangeability using your serial number. Track components are especially model-specific because track width, pitch, and roller spacing vary between CTL models.

How Do I Find the Right T770 Part Number Using My Serial Number?

Your T770 serial number is the definitive reference for parts identification. The serial number plate is located on the left side of the main frame near the rear of the machine.

1. Record the full serial number, including any prefix letters
2. Enter it into Bobcat's online parts catalog for the exact parts list for your production run
3. Cross-reference OEM numbers with aftermarket equivalents on our Bobcat T770 parts page
4. If you cannot find a match, email sales@partsonline.com with your serial number and a description of the part needed

Frequently Asked Questions

How many hours do T770 tracks typically last?

Rubber tracks on the T770 typically last 1,000-2,000 hours depending on terrain and operating habits. Soft soil extends track life, while hard surfaces like concrete and rock shorten it. Proper tension and daily debris clearing have the biggest impact on longevity.

Are T770 parts the same as T750 parts?

Many parts overlap between the T770 and T750 because they share the same frame size. The main difference is the lift path (vertical vs. radial), which affects specific loader arm components. Engine, hydraulic, and cab parts are largely shared. Verify by serial number.

What is the most common T770 problem?

Based on our catalog data, the most frequently ordered T770 parts are door glass, hydraulic hoses, and engine filters, suggesting that impact damage, hose wear, and routine maintenance are the primary service needs. Undercarriage wear is the highest-cost area for CTL owners.

Can I use aftermarket tracks on my T770?

Yes. Aftermarket rubber tracks manufactured to OEM specifications fit the T770's undercarriage and provide comparable performance. Verify the track width, pitch, and number of links match the OEM specification for your machine.

Where is the serial number plate on a T770?

On the left side of the main frame near the rear of the machine, accessible when the rear door is open.

What is the T770 engine oil capacity?

Consult your specific operator's manual for the exact capacity, as it may vary by serial number range. The T770's 92hp engine requires a larger oil volume than smaller Bobcat models. Use the oil weight and specification listed in the manual.

How often should I check track tension on the T770?

Bobcat recommends checking track tension as part of your daily pre-operation inspection. A formal measurement against the service manual specifications should be done at every 500-hour service or whenever the tracks appear visibly loose or tight.

What is the T770's operating capacity?

The Bobcat T770 compact track loader has a rated operating capacity of 3,475 lbs with a vertical lift path. This makes it one of the larger CTLs in the Bobcat lineup, suitable for heavy grading, excavation support, and material handling applications.